Podcasts about btus

In this short Q&A podcast episode, Bryan answers a question from Evan, a licensed mold assessment consultant, about system oversizing: What can be done when an HVAC system is oversized to control humidity and keep occupants comfortable? The extent of the problem will depend on how badly the equipment is oversized, whether it has any turn-down or staging, and how the latent capacity is set up. To make the equipment work as best as it can, reducing the airflow to about 350 CFM per ton can help, as well as properly setting up dehumidification modes. The downside to slower airflow is a likely increase in cabinet and duct sweating. In brand-new houses, it may be possible to swap the condenser (though it may be unlikely with the recent refrigerant change) and then drop airflow at the air handler. You can use AHRI's data to look for a possible match and then check the manufacturer's expanded performance data to verify whether a new condenser is a match.  It's also possible to decouple the latent and sensible loads by installing a dehumidifier. However, completely decoupling the loads is not always practical, as a properly-sized HVAC system is the main source of dehumidification (and the dehumidifier fills in the gaps). Dehumidifiers need to be installed properly (with the supply ducted into the supply duct).  Intentionally derating the equipment's cooling capacity, such as via reheat, will turn it into a better dehumidifier, but you're still adding sensible BTUs and need to be aware of the consequences of that, including higher power bills. You can use electric reheat, remove insulation, or remove shades from windows. Using a smaller compressor until the system can be replaced and downsized would achieve a similar effect but comes with other negative consequences. Right-sizing equipment, load-matching, and managing air movement and heat transfer are ultimately the keys to preventing moisture problems.   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 8th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this episode, HVAC veteran Adam Mufich of National Comfort Institute (NCI) pulls back the curtain on one of the industry's most overlooked problems: the majority of residential HVAC systems in the United States are not delivering the correct amount of airflow. Drawing on decades of hands-on experience, Adam opens up about his own journey from confident installer to humbled diagnostician, sharing the moment he started measuring his systems and realized how much he had been getting wrong. His candor and expertise make this a must-listen for any HVAC professional serious about doing better work. Adam walks listeners through a sobering picture painted by a Department of Energy study covering 44 research projects across the country. The data reveals that between 50 and 93 percent of systems tested moved less than the minimum 350 CFM per ton of capacity, and between 67 and 100 percent of systems leaked more than 100 CFM to the outside. Equipment oversizing is rampant, with some studies showing that up to 93 percent of systems exceed what Manual J calculations would call for. The ripple effects are enormous: compressor failures, blown blower motors, cracked heat exchangers, wasted energy, and homeowners who are simply not comfortable in their own homes. Adam argues that the single most powerful fix is also the most underused one — properly sizing the equipment in the first place. The bulk of the episode dives into two distinct approaches NCI teaches for addressing these problems. The first is the Air Upgrade, a targeted set of repairs focused near the equipment to reduce static pressure and increase fan airflow. This includes reworking the filter system (a commonly undersized 16x25x1 filter can triple the allowed pressure budget on its own), improving duct fittings with lower equivalent lengths, cleaning evaporator coils and blower wheels, adjusting fan speed, and sealing duct joints. The second approach is full Duct Optimization, a more comprehensive renovation that addresses the entire duct system, incorporates Manual D calculations, installs balancing dampers, improves insulation, and uses tools like flow hoods and MeasureQuick to verify that every room in the house is receiving the correct airflow and BTUs. Adam also spends time on the practical and human side of this work — how to talk to homeowners, how to prioritize what matters to them, and how to overcome the very real obstacles that keep technicians from doing thorough airflow work. He addresses everything from fear of opening walls (his solution: build relationships with drywall contractors and offer turnkey repairs) to the simple but powerful mindset shift of treating airflow as something to be measured, not felt with your hand. His closing message is clear: the tools and methods exist, the training is available, and virtually every house in the country has a problem worth solving. The only thing standing in the way is the willingness to do it right. Topics Covered The current state of the HVAC industry based on a DOE meta-analysis of 44 studies Why equipment oversizing is the number one contributor to airflow problems and how to address it How a 50 percent oversized AC system can increase energy consumption by up to 91 percent (per the ASME Journal of Sustainable Buildings) Tools for proper load calculations, including Ample Energy and Conduit apps Why most systems are not moving enough airflow and what the consequences are (heat exchanger failures, compressor failures, comfort complaints) Duct leakage to the outside and its effects on comfort, indoor air quality, and building pressurization The four pillars of NCI's approach: safe, healthy, comfortable, and efficient systems The Air Upgrade approach: targeted repairs near the equipment to reduce static pressure and increase fan airflow The Duct Optimization approach: full duct system renovation with balanced airflow to every room Static pressure profiling: taking four measurements (before/after filter and before/after coil) to pinpoint restrictions Static pressure budgets and how to use them to identify which part of a system is the biggest problem Fan Law 2 as a planning tool to predict system performance before making changes The TrueFlow Grid and its forecasting feature for planning equipment changes Filter sizing and its massive impact on total external static pressure Duct fitting equivalent lengths and how to reduce resistance near the equipment Sealing duct joints and why it adds static pressure that must be planned for The importance of rechecking and adjusting refrigerant charge after any airflow improvement Air balancing with a flow hood to verify delivered CFM at every register Measuring delivered BTUs using tools like MeasureQuick, JobLink, and NCI's ComfortMax workflow Overcoming obstacles: technician buy-in, access to ducts in walls, attic space limitations, and homeowner hesitation Building relationships with drywall contractors to offer turnkey duct repair solutions Why airflow is invisible and why measuring it is non-negotiable   To learn more about NCI and its training offerings, visit https://www.nationalcomfortinstitute.com/. Watch Adam Mufich's previous symposium session, Fan Law 2 for Techs, at https://www.hvacrschool.com/videos/fan-law-2-for-techs-with-adam-mufich/.  Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 7th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this episode, Brad Cooper — second-generation HVAC technician, educator at Arkansas State University-Beebe (ASUBB), and CMHE-certified professional with HVAC Excellence — breaks down geothermal systems for everyday HVAC technicians. Brad brings a grounded, no-hype perspective to a technology that has long intimidated many in the trade. His central message is simple: if you already understand heat pumps and air conditioning, you already have most of the knowledge you need to service geothermal units. The only real difference, as Brad explains, is swapping air for water, a fan for a pump, and a condenser for two heat exchangers. Brad opens with a compelling real-world story: a customer with two malfunctioning geothermal units called a company for help, but because the technicians were unfamiliar with geothermal systems, they replaced both units with air-to-air equipment — costing the customer $25,000 and stripping them of the significant efficiency benefits geothermal provides. This kind of outcome is exactly what Brad wants to prevent. He urges technicians not to shy away from geothermal work the way past generations were told to avoid flex duct or mobile homes, but instead to approach these systems with the same confidence and diagnostic mindset they bring to any HVAC call. A major portion of the episode is devoted to practical diagnostics — specifically, how to use a pressure probe and a temperature probe on the water side to calculate GPM flow, BTU output, and system efficiency using a straightforward chart. Brad walks listeners through the math: a gallon of water weighs 8.34 pounds, multiplied by flow rate and delta T, gives you a reliable BTU reading — all without expensive equipment. He also covers the flush cart, the one specialized tool you'll eventually need for water-side work, and explains that most geothermal calls don't require it at all — the majority of failures are standard heat pump issues like bad capacitors, clogged drain lines, or faulty thermostats. Brad closes with an encouraging, community-minded message: you don't need to go it alone. He encourages technicians to build a network of mentors — someone like a "Paul and a Barnabas" — who can guide them through unfamiliar territory in the field. He also highlights key industry resources, including IGSHPA (International Ground Source Heat Pump Association) for training and certification, GeoFlow for parts and materials, and his brother's company, EDGE Geo Supply, for tools and field training. Brad himself offers his personal phone number and email for anyone with questions, reinforcing that the geothermal community is accessible and willing to help. Topics Covered •       Brad's background as a second-generation HVAC tech and his role at ASUBB and HVAC School •       Why geothermal systems intimidate technicians — and why they shouldn't •       The core analogy: air-to-air vs. geothermal (air → water, fan → pump, condenser → two heat exchangers) •       A $25,000 cautionary tale: replacing working geo units out of fear and unfamiliarity •       Geothermal efficiency: constant EER ratings vs. seasonal SEER ratings and why seasons don't affect geo performance •       BTU fundamentals: what a BTU is and how to calculate BTU output on the water side •       Tonnage review: 1 ton = 12,000 BTUs per hour, melting a ton of ice in 24 hours •       Water weight and flow math: 8.34 lbs/gallon, calculating GPM and BTUs with delta T •       Using a two-probe setup (pressure + temperature) and a field chart to diagnose water-side performance •       The flush cart: what it is, when you need it, and why most jobs won't require it •       Common heat pump-side failures in geo units: capacitors, low-pressure switches, evaporator coils, bad thermostats •       Common water-side failures: bad pump, low water, dirty water, frozen loop field •       How antifreeze/glycol affects heating load and BTU output — and when to add it •       Responding to frozen loop fields during extreme cold events (ice storms in Arkansas and Texas) •       Humidity control advantages of geothermal in high-humidity climates vs. high-efficiency air-to-air units •       Selecting the right system: geo isn't for every home or every situation •       Open-loop options: pulling water from lakes or rivers and utility company incentives •       Closed-loop installation considerations: drilling costs, lot size, and buried line depths •       Building a mentor network for field support (the "Paul and Barnabas" principle) •       Industry resources: IGSHPA for training and certification, GeoFlow, and Edge Geo Supply   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 7th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

Seja membro deste canal e ganhe benefícios:https://www.youtube.com/channel/UCdmGjywrxeOPfC7vDllmSgQ/joinCriminosos clonaram o site da Ticketmaster para enganar fãs do BTS com ingressos falsos via PIX. Veja como se proteger e entenda por que a Anthropic criou uma IA tão poderosa que decidiu não lançar ao público. Além disso: um candidato a emprego foi desafiado a xingar Kim Jong-un para provar que não era um espião.

In this episode, Tyler and eco hold down the fort while Skot is away and dive deep into the frontier of Bitcoin-powered heating and open-source mining. They walk through a new Home Assistant + Venstar-based dashboard built for a customer that tracks miner-delivered BTUs vs. natural gas, stage changes, outdoor temps, sats earned, and economics—proving a single 5kW miner can carry a 3,000+ sq ft home through shoulder season. We unpack heat pumps versus combustion heat, why furnaces are oversized, the sovereignty trade-offs of remote monitoring, and the promise of “buddy systems” that pair hashrate heat with legacy boilers or even wood-fired hydronic setups. We also discuss policy shifts in Denver County, energy resilience at altitude and in extreme cold, and the real-world business models for small-town installers versus metro markets. Then we shift to the 256 Foundation's roadmap. They outline funding realities post-Telehash and the near-term plan to keep four core open-source projects moving: Ember One hash boards (next rev targeting Intel BZM2), LibreBoard control board (v3 on deck and designed to orchestrate multiple boards, relays, and sensors), HydraPool (one-click, self-hostable pool with gamified dashboard and future Lightning/eCash payouts, Start9/Umbral packaging, and plugin architecture), and Mujina firmware (a Linux-like, no-dev-fee, open standard that can be flashed onto legacy S19-class hardware and, ultimately, ship on flagship miners). We talk market dynamics, why open source beats closed aftermarket firmware in the long run, and how Ember One serves as a reference platform for builders even if efficiency lags cutting-edge ASICs today. We wrap with community updates, forum plans for better knowledge sharing, shoutouts to our HydraPool supporters, and details on our “Open Sourcing the Bitcoin Mining Ecosystem” panel in Las Vegas on Monday, April 27.

iOS 26.4 é lançado para todos com ajustes para atender ao ECA Digital. OpenAI descontinua Sora, app que gera vídeos por IA. TecMundo vence Prêmio iBest 2025 na categoria de melhor canal de tecnologia do Brasil. Claude agora controla seu PC à distância para executar tarefas automaticamente. AirDrop entre celulares Samsung e iPhones já funciona no Brasil: nós testamos. Meta perde processo sobre abuso infantil e leva multa de US$ 375 milhões. O Brasil entrou no radar das grandes empresas de IA — e isso diz muito sobre o que vem por aí!

A listener has questions regarding her dual-glaze windows she had installed 15 years ago. In that time, she’s had to replace all of them — is this a common thing? Got chicks? Our next caller sure does! He’s wondering how many BTUs of a small AC unit he would need in a 12x12 building space. It's where he incubates his eggs! Our next caller is building an extension to his single-story California ranch house and needs to figure out if one of his internal walls is load bearing. Lastly, our final caller is asking about siding for the inside of a steel garage that’s been converted into a jumbo mancave and is wondering what Dean would recommend. See omnystudio.com/listener for privacy information.

️ “Wait… where did the liquid go?” That was my reaction about three seconds into a demonstration at a HazMat conference in Edmond, Oklahoma. This was my conversation with John Brinkman, President of Imbibitive Technologies. On the table in front of us was a container with some small white particles in it. They looked like salt or sugar grains. Nothing special. John picked up a bottle of paint thinner and poured it into the container. I expected the liquid to pool at the bottom. Instead…the liquid disappeared. Not evaporated. Not wiped up. The free liquid phase was gone in seconds. John smiled and said: “Once the liquid embibes into the polymer, the liquid phase is eliminated.” Here's what actually happened Those tiny particles were IMBIBER BEADS®. They're oil-sensitive superabsorbent polymers. Most people know superabsorbent polymers from disposable diapers, which absorb water. These beads do the opposite. They are engineered to absorb organic liquids like: • crude oil • gasoline • diesel • solvents …and they ignore water completely. The chemistry is wild Each bead is a solid polymer sphere roughly 150–400 microns in size (about a grain of salt). When hydrocarbons contact the bead: • the liquid diffuses into the polymer matrix • the bead swells several times its original size • the hydrocarbon becomes locked inside the polymer The result: No free liquid phase. Why that matters.. Most spill cleanup materials today are adsorbents — think polypropylene pads. They coat liquids on the surface. Meaning the hydrocarbon can still: • drip • spread • release vapors IMBIBER BEADS® eliminate the liquid phase, which can: • reduce secondary contamination • lower hazardous vapor off-gassing • simplify containment and recovery The craziest part? This chemistry was invented in 1968 by polymer chemist Dr. Richard Hall. More than 50 years ago. Today the technology is being applied to: • oil spill response • refinery containment • stormwater filtration • hazmat cleanup • oil-water separators Even more interesting… Hydrocarbons captured in the beads can be used in energy-from-waste systems producing 15,000+ BTUs per pound. Cleanup material → recoverable energy. This is why I love stepping outside the oil & gas silo. When chemists, engineers, hazmat responders, and energy operators collaborate…you discover technologies that change how problems get solved. Sometimes the most disruptive technology in the room…is a polymer bead smaller than a grain of salt. If you work in: • oil & gas • refining • pipeline response • hazmat • environmental remediation What applications could you see for something like this? Curious to hear your thoughts. www.imbiberbeads.com⁠� #Energy #OilAndGas #HazMat #EnvironmentalTech #SpillResponse #Engineering #PolymerScience #IndustrialSafety

Want your spa hot in 25 minutes or your pool warm all season without crushing bills? We break down the real differences between gas heaters and heat pumps so you can pick with confidence. From wiring needs and gas line runs to BTU sizing and actual heat-up times, we translate specs into clear choices you can act on.We start with the basics: why a gas heater delivers instant, on-demand heat while a heat pump pulls warmth from the air with far better efficiency. Then we look at the hidden costs of switching—dedicated 230-volt runs for heat pumps, new gas lines for heaters—and how those infrastructure moves can outweigh any small difference in utility rates. You'll hear how climate shifts performance, too: gas stays consistent even in the 40s, while heat pumps shine in mild weather and can even chill overheated pools in summer.If speed, recovery time, and cold-night spa sessions matter most, a properly sized 400,000 BTU gas heater is tough to beat. If steady comfort, solar integration, and long-term efficiency are your goals, a heat pump often wins on cost per degree. We also share practical notes on lifespan, maintenance complexity, footprint in tight pads, and noise. For anyone stuck between camps, we spotlight Pentair's UltraTemp ETi High Performance Hybrid Heater—one cabinet with four modes: heat pump, gas, hybrid, and dual—so you get fast spa heat when you need it and efficient daily warmth when you don't.By the end, you'll know which option fits your climate, budget, and space—and when a hybrid makes the decision effortless. If this helped you plan your next upgrade, subscribe, share the show with a pool owner who needs it, and leave a quick review to tell us your climate and what you chose.• core differences between gas heaters and heat pumps• installation needs for electrical lines and gas lines• heating speed, BTUs, and real warm-up times• operating costs, efficiency, and solar synergy• climate impacts on performance and reliability• footprint, noise, and recovery time on busy days• regional patterns and Send a textSupport the Pool Guy Podcast Show Sponsors! HASA https://bit.ly/HASAThe Bottom Feeder. Save $100 with Code: DVB100https://store.thebottomfeeder.com/Try Skimmer FREE for 30 days:https://getskimmer.com/poolguy Get UPA Liability Insurance $64 a month! https://forms.gle/F9YoTWNQ8WnvT4QBAPool Guy Coaching: https://bit.ly/40wFE6y

Como Vorcaro enviava mensagens de visualização única no WhatsApp? Domo de Ferro: cibercriminosos alegam ter desativado defesa aérea de Israel. Xbox anuncia Project Helix, console de nova geração que roda jogos de PC. O Brasil deve proibir redes sociais para menores? Senado aprova aumento de pena para furto e roubo de celular. Dell, ChatGPT, Nvidia e mais!

Vídeo mostra 'túnel de drones' do Irã preparados para ataque. OpenAI vai revisar acordo com o Departamento de Guerra dos EUA após reação negativa. Motorista da Uber viraliza ao criar jogo sobre ele mesmo. TSE regulamenta uso de IA nas Eleições 2026; conheça as novas regras e Google alerta que Irã vai retaliar no ambiente cibernético.

In this live episode recorded at the AHR Expo 2026 Podcast Pavilion in Las Vegas, host Bryan sits down with longtime friend and industry expert Nikki Krueger of Santa Fe and AprilAire. Nikki brings over 15 years of experience in indoor air quality and whole-home dehumidification to the conversation, having started her career with AprilAire before moving to Santa Fe (formerly Ultra Aire) — and now coming full circle as the two brands have integrated under the AprilAire umbrella as of January 1st of this year. The episode dives deep into a topic close to both hosts' hearts: how to properly manage indoor humidity, and what role a whole-home ventilating dehumidifier plays in a comprehensive HVAC system strategy. Bryan and Nikki lay out a holistic framework for tackling moisture problems, emphasizing that a dehumidifier should be the last tool added — not the first. Before reaching for dedicated dehumidification equipment, contractors need to assess the building envelope for air leaks, evaluate whether the air conditioning system is properly sized (oversizing is a major contributor to poor latent removal), confirm that the AC is set up with the right airflow and sensible heat ratio, and take into account the ventilation strategy and occupant behavior. The pair discuss real-world scenarios ranging from elderly residents in Florida who keep their thermostats at 80°F, to a project in Barbados where overcooling caused interstitial condensation in walls and ceilings. The message is clear: humidity control is a systems problem, not a single-product fix. A significant portion of the episode is dedicated to proper installation practices for whole-home dehumidifiers. Nikki explains why Santa Fe recommends pulling from a dedicated return and discharging into the supply side of the AC duct — rather than tying into the return side — because the heat generated by dehumidification (roughly 1,054 BTUs per pint of water removed) can warm the AC evaporator coil and reduce its latent removal capacity. Bryan adds nuance around dew point management when routing outdoor air ducts, and both hosts agree that fan operation strategy (continuous low-speed vs. intermittent) matters more in tight, low-load homes where mixing is harder to achieve naturally. They also clarify a common misconception: a ventilating dehumidifier is not a dedicated outdoor air system (DOAS) and does not automatically condition incoming ventilation air before it enters the home. The conversation wraps up with an exciting look at Santa Fe's newly launched Ultra V Series, which features an upgraded 8-inch ventilation duct (up from 6 inches), a more powerful fan for handling higher static pressure in retrofit applications, a new digital control panel, and a wired remote humidity sensor that can be placed in the living space for more accurate readings. Nikki and Bryan also field audience questions on topics like short-cycling risks from oversized dehumidifiers and why Santa Fe chose a wired sensor over wireless (accuracy, reliability, and fewer callback headaches). Bryan closes by noting that rising dew points across most U.S. markets over the last 20 years make whole-home dehumidification more relevant than ever — and that any region where you can see green grass outside is a candidate for a more advanced moisture control strategy. Topics Covered Introduction to Nikki Krueger and the merger of Santa Fe and AprilAire under one brand The purpose of whole-home ventilating dehumidifiers and how they fit into an overall HVAC system strategy Latent vs. sensible heat loads explained — and why both matter for comfort and moisture control Geographic reach of humidity problems — why dehumidification isn't just a Florida or Gulf Coast issue Ken Gehring ("Teddy Bear"), inventor of the whole-house ventilating dehumidifier, and his framework for diagnosing moisture problems The four-factor checklist before deploying a dehumidifier: building envelope, AC sizing, AC setup/airflow, and ventilation strategy How occupant behavior (thermostat preferences, activity levels, large households) creates latent load variability The dangers of overcooling — how setting thermostat too low can cause interstitial condensation in walls, ceilings, and attics Sensible heat ratio (SHR) and its role in a system's ability to remove moisture — targeting ~350 CFM per ton in humid climates Why dehumidifiers should connect to a dedicated return and discharge into the supply — not tie into the AC return side How dehumidifier heat output (~1,054 BTUs per pint) can reduce AC coil efficiency when ducted incorrectly Fan-on strategy debate: when running continuous low-speed circulation helps vs. hurts humidity control Tighter homes, smaller systems, and the importance of air mixing strategies (including ceiling fans)  Ventilating dehumidifiers vs. dedicated outdoor air systems (DOAS) — clearing up a common misconception about how ventilation air is conditioned Dew point management for outdoor air ducts — preventing condensation inside duct runs Using dehumidifiers to address sweating ductwork in multi-story homes Rising dew points over the past 20 years and what "green grass climates" means for dehumidification demand Heat pump oversizing challenges in colder climates and the downstream impact on AC latent removal Santa Fe's new Ultra V Series: 8-inch ventilation duct, stronger fan, digital controls, and wired remote humidity sensor Why proper dehumidifier sizing matters: short-cycling risks, moisture reservoir release, and uneven RH throughout the home Why Santa Fe chose a wired humidity sensor — accuracy, reliability, and reducing contractor callbacks Audience Q&A: oversizing consequences, short-cycling mechanics, and sensor placement best practices   Learn more about Santa Fe Dehumidifiers at santafeproducts.com.  Connect with Nikki Krueger on LinkedIn or Instagram @nikkikruegerIAQ. Check out the work of Ken Gehring ("Teddy Bear") or ask him a question on the HVAC Talk Forum: hvac-talk.com. Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 7th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this informative episode, host Bryan welcomes guest Bert for an in-depth discussion on the often-overlooked but critically important topic of electric heat in HVAC systems. The conversation takes listeners through both the common and uncommon issues that arise with electric heat installations, offering practical insights drawn from years of field experience. Bryan and Bert balance technical expertise with relatable storytelling, making complex electrical concepts accessible to both HVAC professionals and homeowners interested in understanding their heating systems. The discussion begins with some of the more dramatic (and rare) scenarios, including tales of objects left on heat strips during installation—from instruction manuals to spray glue cans—that have led to fires and property damage. These cautionary tales serve as memorable reminders of the importance of proper installation practices. The conversation then shifts to the far more common issues technicians encounter regularly, particularly loose electrical connections. With electric heat strips drawing substantial continuous amperage—often 20 amps per 5kW or more—poor connections can quickly lead to melted wire nuts, damaged terminal blocks, and potentially dangerous situations. Bryan and Bert emphasize that these connection problems often don't manifest until the heating season begins, making proper installation and inspection critical. Bryan and Bert also address widespread confusion around emergency heat versus auxiliary heat, explaining why emergency heat settings are largely obsolete in most modern heat pump applications. They clarify that in typical residential installations with 5-10kW heat strips, the electric backup cannot efficiently heat an entire home on its own, making the emergency heat function impractical. Instead, auxiliary heat should work in tandem with the heat pump to supplement heating during extremely cold conditions or defrost cycles. The hosts advocate for implementing lockout controls that prevent auxiliary heat from activating unless outdoor temperatures drop below 40 degrees, helping homeowners avoid unnecessarily high electricity bills while still maintaining comfort. The technical discussion extends to critical safety mechanisms, including interlocks, thermal overloads, and fusible links that prevent catastrophic failures. Bryan provides historical context on how interlock systems have evolved from high-voltage relay-based designs to modern control board logic, while warning against improper retrofitting that can create new hazards. The episode concludes with practical guidance on proper sizing, voltage considerations, airflow requirements, and the economics of electric heat versus other fuel sources. Throughout the conversation, Bryan and his guest stress that while electric heat is simple and reliable, it demands respect for proper electrical practices and thoughtful system design to ensure both safety and cost-effectiveness. Topics Covered Installation Horror Stories and Safety Hazards: Objects left on heat strips causing fires, including the infamous spray glue can incident Loose Electrical Connections: The #1 issue with electric heat systems and why continuous high amperage makes proper connections critical Wire Sizing and Breaker Matching: Common mistakes when replacing furnaces with heat pumps and the dangers of undersized wiring Emergency Heat vs. Auxiliary Heat: Why emergency heat is largely obsolete in modern residential applications and when auxiliary heat should actually engage Heat Output Calculations: Understanding BTU production per kilowatt (3.41 BTUs per watt) and why 5-10kW strips can't heat most homes alone Lockout Controls and Outdoor Thermostats: Implementing temperature-based restrictions to prevent unnecessary auxiliary heat operation above 40°F Interlock Systems Evolution: How blower/heat strip safety interlocks have changed from relay-based to control board logic Thermal Overloads and Fusible Links: The two types of safety devices that prevent overheating and fire hazards Defrost Cycle Operation: How auxiliary heat integrates with heat pump defrost sequences Balance Point and Dual Fuel Considerations: Economic and operational factors in choosing between electric and gas backup heat Voltage Variations and Sizing: Working with different voltage ratings (208V vs. 240V) and how they affect heat output Diagnostic Techniques: Using Ohm's law and resistance measurements to verify heat strip operation and specifications Airflow Requirements: Why proper air movement is critical for preventing overload trips and premature failures Electrical Safety Practices: Avoiding dangerous shortcuts like bypassing thermal limits or using undersized relays Energy Efficiency and Economics: Comparing the true cost-effectiveness of electric heat versus gas and heat pump operation   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 7th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this short podcast episode, Bryan covers the history of the great heating debate: furnaces vs. heat pumps or combustion vs. compression. He also gives a breakdown of each other's strengths and gives his two cents on the winner of the debate. Fire kept humans warm for much of history, but engineers developed a way to move heat by manipulating refrigerant pressures. Early heat pumps got a bad rap because they didn't live up to the hype; they had frequent operational issues, didn't heat effectively, and were largely unable to be serviced effectively by technicians. However, heat pumps have evolved and now outperform furnaces in many areas. Ones with COPs between 2 and 5 can be anywhere from 200-500% efficient in terms of watts in, BTUs out. They also have many safety benefits over gas furnaces, including no risk of flame rollout, carbon monoxide poisoning, and gas leaks; removing the gas meter and all its risks entirely is a possibility.  Nevertheless, some people still insist that combustion is king due to its comfort, as furnaces' heat is more intense than that of heat pumps. Furnaces also require little electricity, making them more sensible in markets with weak or dirty electrical grids. Combustion appliances also only need to work part of the year, meaning they run fewer cycles and experience less mechanical wear over the same period of time as heat pumps (thus may have longer lifespans). Dual fuel allows you to get the best of both worlds; it allows the heat pump to handle the cooling and most of the heating for the energy efficiency benefits, and the furnace can step in when more intense heat is needed. Ultimately, the "winner" of this debate, at least to Bryan, is the most sensible solution for energy costs, safety, comfort, and reliability; the real answer will depend on the climate, infrastructure, and other factors.   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 7th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this comprehensive episode of the HVAC School podcast, host Bryan Orr sits down with three experts from Copeland to demystify tandem and trio compressor systems. Joining him are Gina Kahle (Multiples Engineering Manager with 12+ years at Copeland), Tyler Daniels (Product Management team member), and James Stevenson (Technical Sales veteran with 28 years of field experience). Together, they provide both the engineering perspective and real-world service insights that technicians need to understand these increasingly common systems. The conversation begins with the fundamentals: tandem and trio systems represent an evolution in compression modulation, allowing multiple compressors to work together on a single circuit rather than requiring separate circuits for each compressor. This design philosophy delivers significant advantages, including energy savings through better modulation, simplified system design, reduced costs, and the ability to meet stringent minimum modulation requirements (such as the 25% threshold for units under 60,000 BTUs per hour). The team emphasizes that tandems aren't just about pairing any two compressors together—Copeland engineers carefully consider application requirements, flow characteristics, and stress testing to ensure reliable oil management and system resonance control. A major focus of the discussion centers on practical service considerations that every technician needs to understand. James provides invaluable guidance on identifying whether a failed compressor in a tandem system can be replaced individually or requires replacing the entire tandem assembly. The "rule of thumb" is clear: compressors small enough to fit in residential systems (typically under 10 horsepower or about 7 inches in diameter) generally require full tandem replacement, while larger units may allow single compressor replacement. The distinction between "tandem ready" and non-tandem ready compressors becomes critical here—larger compressors (10+ horsepower) are typically sold tandem ready at wholesalers with the necessary oil equalization ports and sight glass connections, while smaller units are not. The episode also explores advanced topics, including the integration of Enhanced Vapor Injection (EVI) technology with tandem systems, particularly for cold climate heat pump applications. Gina explains how EVI extends the operating envelope down to -40°F, opening new markets and applications. The team discusses the transition to A2L refrigerants and how Copeland continues to innovate despite changing regulatory landscapes. Throughout the conversation, they emphasize the critical importance of proper oil management through oil equalization lines (OEL) and two-phase transfer lines (TPTL), and why maintaining these connections exactly as designed is non-negotiable for system longevity. Key Topics Covered: Tandem and Trio Basics: Definition and benefits, including energy savings, cost reduction, and design simplification Modulation Requirements: Meeting state-mandated minimum modulation thresholds (25% for units under 60,000 BTU/hr) Applications: Data centers, DOAS units, rooftops, chillers, and various commercial spaces Compressor Pairing Options: Fixed speed, digital, variable speed, two-stage, and mixed configurations Oil Management: Critical importance of oil equalization lines (OEL), two-phase transfer lines (TPTL), and gas equalization lines (GEL) Service and Replacement: How to identify tandem-ready vs. non-tandem-ready compressors; when to replace individual compressors vs. full tandem assemblies Visual Identification: Using compressor size (7" vs 9" diameter), port configuration, and horsepower ratings to determine replacement strategy Piping Configurations: Three-pipe vs. four-pipe designs and when each is necessary Installation Considerations: Importance of keeping oil equalization lines level (parallel to ground) and using proper mounting spacers Enhanced Vapor Injection (EVI): How EVI technology extends operating envelopes to -40°F for cold climate heat pump applications Energy Efficiency Standards: Meeting IEER, IPLV, and upcoming IVEC standards through strategic tandem use Copeland Mobile App: Features, including parts lookup, resistance specifications, amperage mapping, AI Scout assistant, and technical bulletins   Learn about the Copeland Mobile app at https://www.copeland.com/en-us/tools-resources/mobile-apps/copeland-mobile.  Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 7th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

No vídeo de hoje você fica sabendo como o Brasil está prestes a ter internet via satélite de 1 Gbps, a parceria entre Nubank e Amazon que oferece até 24× no parcelamento, os rumores do Galaxy S26 Ultra com carregamento de 60 W e o possível vazamento de 100 mil credenciais na Universidade Cruzeiro do Sul._____________________________________________________

 Boiler rooms reward clarity: how many BTUs from the flame actually arrive in steam—and stay there to do useful work? For Boiler Tuesday, Trace Blackmore, CWT, treats boiler care as heat-transfer management across the full train, from feedwater and deaeration to distribution and condensate return, with dry steam as the operational benchmark. Heat Transfer Is a Leadership Metric Dry steam isn't a detail; it's throughput. Steam on its worst day carries ~1,150 BTUs while hot water on its best day carries ~180 BTUs. When carryover creates wet steam, production loses energy at the point of use. Treating “BTUs-in-steam” as a shared KPI aligns maintenance, operations, and finance around the same outcome: efficient work.  The Steam Train: Protect the Interfaces  Trace maps the sequence—pretreatment → feedwater/DA → boiler → steam lines → condensate return—and explains where heat transfer is taxed when fouling or poor practices creep in. Recover condensate BTUs, verify deaerator performance, keep tube interfaces clean, and protect dryness at end users. Each interface preserved is energy returned to work.  Field Perspectives & Safety  Concise greetings from global practitioners reinforce fundamentals and vigilance. Barry Higgins underscores soft, high-quality water for “fluffy steam.” Ivan Morales contrasts OTSGs with conventional boilers and the implications for steam quality. Ben Frieders offers a memorable safety reminder: disciplined restarts and gasket integrity are non-negotiable in steam environments.  Boiler Tuesday is a call to manage heat-transfer efficiency, not just chemistry. Protect interfaces, speak in BTUs, and make dryness measurable where the work happens.  Stay engaged, keep learning, and continue scaling up your knowledge!    Timestamps   02:20 — Welcome and IWW25 context; Boiler Tuesday focus (why: frame the professional lens for the week).  03:46 — “Heat transfer efficiency managers”: defining the water treater's job (why: reframes role beyond chemistry)  08:13 — Technology parity; execution and knowledge as differentiators (why: invest in people and practice).  09:59 — The train: feedwater/DA, boiler, lines, condensate return (why: systems thinking prevents local optimization)  12:52 — Guest greetings begin: international and cross-industry viewpoints (why: broaden operating context).  14:04 — Barry Higgins: soft water for “fluffy steam” (why: pretreatment quality → steam quality).  16:18 — Ivan Morales: OTSG vs conventional cycles and steam quality differences (why: choose tech with eyes open).  17:36 — Ben Frieders: post-inspection restart incident and safety lesson (why: operational discipline in steam).  20:19 — Detective H2O: The Case of Having The Blues 25:07 — Boiler Tuesday call to action: share photos, use IWW25 hashtag (why: community and practice sharing).    Connect with Barry Higgins  Phone: +353 87 987 8606  Email: bhiggins@aquachem.ie  Website: www.aquachem.ie   LinkedIn: in/barry-higgins-bagrsc-59030225    Connect with Ivan Morales  Website: www.ecolab.com/nalco-water/  LinkedIn: linkedin.com/in/ivan-morales-mba-06793b5/  linkedin.com/company/nalco/    Connect with Ben Frieders   Phone: (317) 719-1452   Email: bfrieders@zinkan.com   Website: https://www.getchemready.com/    LinkedIn: https://www.linkedin.com/in/benjaminfrieders/    https://www.linkedin.com/company/getchemready/        Links Mentioned  AWT (Association of Water Technologies)  Scaling UP! H2O Academy video courses  Submit a Show Idea  The Rising Tide Mastermind  Industrial Water Week  Industrial Water Week Scaling UP H2O Resource Page 353 Steam Boilers: Essential Checks, Part 1  354 Steam Boilers: Essential Checks, Part 2  366 Produced Water: Expert Perspectives and Practical Tips  420 Tapping Into Tech: How Ben Frieders Uses AI to Elevate Water Treatment Marketing 

CEO brasileiro da Qualcomm prevê estreia do 6G para 2028; iFood lança chip de telefonia para entregadores do app; Alibaba anuncia planos de instalar data centers no Brasil e outros países, além de parceria com Nvidia; Empresa de quase 200 anos vai à falência após ataque de ransomware; Battlefield 6 e finalmente o jogo do Wolverine! Resumo do State of Play com trailers e anúncios da PlayStation na TGS 2025!Se inscreva no nosso novo canal, o TecMundo Security! Lá teremos documentários, notícias, entrevistas e podcasts sobre cibersegurança!

Tesla e Samsung firmam acordo de 16 bilhões de dólares para chips de inteligência artificial. E tem mais: a Meta quer controlar seus gadgets só com gestos, o Google levou um processo curioso por foto de homem nu no Street View, vazou tudo sobre o novo Galaxy S25 FE e o Pixel 10 Pro apareceu com visual novo, fone e smartwatch.

As notícias de hoje, que estão com os tempos marcados aqui embaixo incluem Correios lança site de compras com mais de 500 mil produtos, Empresas agora poderão te ligar também pelo WhatsApp, Governo regulariza uso de IA em investigações criminais, Trump sugere deportar e cortar contratos com Elon Musk e Microsoft demite 9 mil funcionários e divisão Xbox é bastante afetada.

In this short podcast episode, Bryan talks about EER (Energy Efficiency Ratio) and SEER (Seasonal Energy Efficiency Ratio) and how to calculate EER in the field. EER and SEER are ratings that we often see on equipment (as are SEER2 and EER2) based on a ratio of an output to an input. Whereas coefficient of performance (COP) is a direct ratio of watts out to watts in, EER and SEER account for BTUs and watts. EER and SEER indicate the cooling capacity (in BTUs) we get from the watts we put in. The ratio changes based on field conditions, and EER2 and SEER2 have more realistic test conditions than EER and SEER (the static pressure for systems rated below 65,000 BTUs per hour was 0.1"wc for EER and SEER, and it is now 0.5"wc for EER2 and SEER2, which is much closer to average field conditions). To determine EER, you have to figure out BTU production and stack it against your wattage. You'll need to know your delta enthalpy (delta H), multiply it by the CFM, and then multiply the product of those by 4.5 to get your BTU output. A calculator on apps like measureQuick can help you find out your delta H, but you'll need a proper wet-bulb temperature before you can do that. You can determine CFM with a TrueFlow grid or manufacturer's blower charts. Finding watts can be a challenge with ECMs and inverter-driven systems; it's not as simple as volts x amps, and you will need a meter that can measure power factor and take readings from the condenser fan, compressor, and blower motor. That wattage becomes the number you divide into BTUs to get the EER. SEER is averaged over a season, HSPF is for heating instead of cooling, and you can convert the BTUs to watts (by multiplying by 3.41) and determine the ratio of watts out to watts in.   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool. Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android. Subscribe to our YouTube channel. Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android

David Simpkins, Director of Technology at Polygon, delves into the world of construction heating and moisture control solutions in a recent presentation from their North Andover office near Boston. Simpkins introduces three varied heat options that cater to the diverse demands of construction sites, ensuring an optimal climate for efficient operations. The Spectrum of Heaters Simpkins unveils a direct-fired 2.5 million BTU heater, suitable for applications that can manage 100% outside air. However, this powerful unit sacrifices recirculation for effective ventilation, resulting in higher energy costs and combustion products in the airstream. On the other hand, a 150 kW electric heater enables air recirculation either inside the space or adjacent to the building, trading a lesser half a million BTUs for cleaner ventilation. Two versions of the million BTU indirect-fired heaters introduce the option of mixed air – recirculating the inside air while simultaneously drawing in outside air. Energy Efficiency and Controlled Environments These indirect-fired units, functioning like a furnace that secludes the combustion products from the air, present a more energy-efficient option. Moreover, these heaters also provide the prospect of adding desiccant dehumidification, allowing independent control of temperature and humidity. Simpkins highlights how this feature is crucial for certain construction processes that require precise environmental conditions, like drywall drying and millwork installation. Match the Heater to the Project To close out, Simpkins ensures that Polygon's dedicated business development team is always eager to assist in selecting the best-suited equipment from their extensive range for any project. Experience the difference with Polygon's advanced construction heating solutions, effortlessly managing moisture and temperature in your construction environment for optimal results.

David Simpkins, Director of Technology at Polygon, delves into the world of construction heating and moisture control solutions in a recent presentation from their North Andover office near Boston. Simpkins introduces three varied heat options that cater to the diverse demands of construction sites, ensuring an optimal climate for efficient operations. The Spectrum of Heaters Simpkins unveils a direct-fired 2.5 million BTU heater, suitable for applications that can manage 100% outside air. However, this powerful unit sacrifices recirculation for effective ventilation, resulting in higher energy costs and combustion products in the airstream. On the other hand, a 150 kW electric heater enables air recirculation either inside the space or adjacent to the building, trading a lesser half a million BTUs for cleaner ventilation. Two versions of the million BTU indirect-fired heaters introduce the option of mixed air – recirculating the inside air while simultaneously drawing in outside air. Energy Efficiency and Controlled Environments These indirect-fired units, functioning like a furnace that secludes the combustion products from the air, present a more energy-efficient option. Moreover, these heaters also provide the prospect of adding desiccant dehumidification, allowing independent control of temperature and humidity. Simpkins highlights how this feature is crucial for certain construction processes that require precise environmental conditions, like drywall drying and millwork installation. Match the Heater to the Project To close out, Simpkins ensures that Polygon's dedicated business development team is always eager to assist in selecting the best-suited equipment from their extensive range for any project. Experience the difference with Polygon's advanced construction heating solutions, effortlessly managing moisture and temperature in your construction environment for optimal results.

As notícias de hoje incluem a Apple aparentemente encerrando a produção do Vision Pro, o Telegram começando o ano com recursos para NFTsde presente e novo sistema de verificação de contas, a placa de vídeo RTX 5090 da NVIDIA pode ter 24 GB de memória na sua versão para notebooks graças a uma nova tecnologia, a Tesla registrando a primeira queda nas vendas de carros elétricos desde 2012 e o site da Poco saindo do ar para dar início a reunificação da empresa com a Xiaomi. Boa noite e bem-vindos ao Hoje no TecMundo, o seu resumo diário de tecnologia!

In today's podcast, Bryan talks with legendary Hydronics author and trainer Dan Holohan about the history of steam heating and some practical applications of old ideas. Recently, Dan has been working on more novels, having published two of them over the past few months. Steam heating is a “lost art” nowadays; it has become increasingly uncommon and has been disappearing since the Vietnam War. Many people who understood steam heating either retired or died after the Vietnam War. Many elements of steam heating are difficult to understand or surprising. (For example, steam pressure has a surprising relationship with velocity: low-pressure steam moves through piping much more quickly than high-pressure steam.) So, Dan Holohan is on a mission to revive that knowledge and teach the newer generations about the lost art. There are many older steam heating systems still operating today, especially in the older large buildings in New York. Dan learned a lot about steam heating when working on these old systems and optimizing them. Most of the time, he optimized those systems by removing unnecessary accessories, not by adding components like steam traps. Many old boilers used coal as a heat source. Nowadays, many old boilers have been fitted with conversion oil burners with thermostats, but they are still piped for coal. Some systems now have multiple risers or massive vents on the main riser to prevent the thermostats from getting too hot too early and satisfying the thermostat too early. We call that master venting, which reduces pressure and allows steam to move very quickly and efficiently. Dan also discusses: The 2-PSI standard Transportation metaphors for BTUs in steam Harmful renovations for old boilers Replacement vs. restoration mindsets Gaps in steam boiler education Monopolizing the market if you HAVE the education Boiler piping and venting Two-pipe vs one-pipe steam   Find out more about Dan and hydronic heating at HeatingHelp.com. Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.  Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android.   Subscribe to our YouTube channel.  Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

Listen to hear what's coming in hot for 2025! There are so many exciting trends that are popping up, and we are here for it! Have a look at the gorgeous wallpaper from Morris and Co that Kelly used for her client's kitchen. See it HERE. You can actually order this pattern from Home Depot! Farrow & Ball Caulk Green is a beautiful paint that looks fantastic with the Black Thorn wallpaper. See it HERE. Kelly's blog post on BTUs to help you understand the type of range hood you might need. Read it HERE. DTT defines scullery We are including affiliate links to Amazon and other retailers. If you make a purchase we may earn a small fee at no cost to you. CRUSHES: The Talking Gardens podcast from Gardens Illustrated magazine is Kelly's crush this week. Have a listen HERE. Anita's crush are the plaid Christmas chargers HERE Need help with your home? We'd love to help! We do personalized consults, and we'll offer advice specific to your room that typically includes room layout ideas, suggestions for what the room needs, and how to pull the room together. We'll also help you to decide what isn't working for you. We work with any budget, large or small. Find out more HERE Hang out with us between episodes at our blogs, IG and Kelly's YouTube channels. Links are below to all those places to catch up on the other 6 days of the week! Kelly's IG HERE Kelly's Youtube HERE Kelly's blog HERE Anita's IG HERE Anita's blog HERE Are you subscribed to the podcast? Don't need to search for us each Wednesday let us come right to your door ...er...device. Subscribe wherever you listen to your podcasts. Just hit the SUBSCRIBE button & we'll show up! If you have a moment we would so appreciate it if you left a review for DTT on iTunes. Just go HERE and click listen in apple podcasts. XX, Anita & Kelly DI - 10:21/30:20 Learn more about your ad choices. Visit megaphone.fm/adchoices

Listen to hear what's coming in hot for 2025! There are so many exciting trends that are popping up, and we are here for it!Have a look at the gorgeous wallpaper from Morris and Co that Kelly used for her client's kitchen. See it HERE. You can actually order this pattern from Home Depot!Farrow & Ball Caulk Green is a beautiful paint that looks fantastic with the Black Thorn wallpaper. See it HERE.Kelly's blog post on BTUs to help you understand the type of range hood you might need. Read it HERE.DTT defines sculleryWe are including affiliate links to Amazon and other retailers. If you make a purchase we may earn a small fee at no cost to you.CRUSHES:The Talking Gardens podcast from Gardens Illustrated magazine is Kelly's crush this week. Have a listen HERE.Anita's crush are the plaid Christmas chargers HERENeed help with your home? We'd love to help! We do personalized consults, and we'll offer advice specific to your room that typically includes room layout ideas, suggestions for what the room needs, and how to pull the room together. We'll also help you to decide what isn't working for you. We work with any budget, large or small. Find out more HEREHang out with us between episodes at our blogs, IG and Kelly's YouTube channels. Links are below to all those places to catch up on the other 6 days of the week!Kelly's IG HEREKelly's Youtube HEREKelly's blog HEREAnita's IG HEREAnita's blog HEREAre you subscribed to the podcast? Don't need to search for us each Wednesday let us come right to your door ...er...device. Subscribe wherever you listen to your podcasts. Just hit the SUBSCRIBE button & we'll show up!If you have a moment we would so appreciate it if you left a review for DTT on iTunes. Just go HERE and click listen in apple podcasts.XX,Anita & KellyDI - 10:21/30:20 Learn more about your ad choices. Visit megaphone.fm/adchoicesSee Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

In this short podcast, Bryan talks about evaporator coil placement based on a question submitted by a listener, John. Evap coil placement differs in furnace applications versus air handlers. When we use air conditioners with furnaces, we usually put evaporator coils on the positive side to protect the heat exchanger from rusting out during the summer (due to condensation and the chemical reactions that can occur with the metal heat exchanger). However, when it comes to air handlers, they're usually on the negative side. The coil is usually on the negative side of a fan coil or air handler because it keeps the blower motor cooler (though that doesn't make a huge difference in terms of performance).  The HVAC system will lose fewer BTUs to leakage when the coil is on the negative side, which is better for energy efficiency; those BTUs can reach the conditioned space rather than the closet, garage, or wherever it is stored. Pulling air over the evaporator coil on the negative side, however, could potentially lead to greater turbulence.  We run into challenges with evap coil placement on gas furnaces when we have dual fuel systems (a heat pump and furnace working together). You can't run gas heat over a heat pump coil due to the high head pressure, so a parallel setup would avoid the risks of high head pressure (downstream) or rusted-out heat exchangers (upstream).    Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.  Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android.   Subscribe to our YouTube channel.  Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this short Q&A podcast, Bryan answers a listener-submitted question about apps for doing proper loads. Fred specifically asks about apps or charts that can help an HVAC contractor determine the insulation value of a home without assuming numbers or drilling into walls during load calculations. Load calculations account for all the ways that BTUs can enter or leave a home: conduction, convection, and radiation. Insulation prevents heat transfer via conduction, so it's important to the load calculation process. High-end HVAC design software like Wrightsoft and Kwik Model 3D will have these features built into them (based on the age and location of the home). ASHRAE's handbook also has tables and data with R-values and U-factors to help you out with Manual J load calculations. RED Calc is an app that allows you to calculate a wall's R-value with measurements, including surface and air temperatures indoors and outdoors. This RED Calc software is available through the U.S. Department of Energy, as is REScheck. The DOE insulation fact sheet is also quite valuable, as are The Engineering Toolbox and materials straight from the insulation manufacturers. The best way to get a comprehensive load calculation is to have a lot of tribal knowledge about how houses are built in your area, analyze energy bills, and combine tools like RED Calc with building performance tests.   RED Calc is available through the U.S. DOE at https://basc.pnnl.gov/redcalc. REScheck is available at https://www.energycodes.gov/rescheck.  ASHRAE's resources are available at https://ashrae.org/technical-resources.  Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.  Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android.   Subscribe to our YouTube channel.  Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this short podcast episode, Bryan answers a listener-submitted question about an HVAC system that won't dehumidify. This question was submitted by a homeowner with a Carrier heat pump with an attic air handler that cools but won't dehumidify on the hottest days of summer. One of the past companies that serviced the system added charge, but the problem wasn't resolved. This case doesn't seem to be a sizing issue, as the insufficient dehumidification is happening on the hottest days. Normally, sizing issues happen during the edge seasons when temperatures aren't as high as in the summer, but the dew points are still high.  Bryan's first recommendation is to use measureQuick to evaluate the delivered capacity and determine the sensible heat ratio (SHR) by comparing sensible BTUs to latent BTUs. High SHRs are associated with less effective dehumidification and more effective sensible BTU removal. Then, we have to determine that airflow is properly dialed in. Typically, lower fan speeds are associated with better dehumidification; 350 CFM per ton is typical of humid climates. In the case of two-speed or variable-speed equipment, we should verify that it is staging up and down properly.  On the ventilation side, a duct leakage test is recommended. Proper use of exhaust ventilation, like bath fans and kitchen exhaust, is also critical. Structural leakage and MAD-AIR are also worth checking if a company can measure those, though those are premium services that are usually more expensive.   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.  Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android.   Subscribe to our YouTube channel.  Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this short Q&A podcast, Bryan answers a listener-submitted question about sizing heat pumps for heat load in heating mode, something that we haven't talked much about in the past due to the greater need for cooling in our market. In most cases across the country, a heat pump's heating loads will be greater than the cooling loads. There is a greater swing between the desired temperature and the actual temperature in heating mode than in cooling mode (in terms of sensible BTUs). We don't want to oversize for cooling because of its lower efficiency, comfort, and humidity control due to the shorter runtimes. (However, oversizing for cooling loads is far less of an issue in arid climates.) We don't want to oversize the heat pump to meet the heating load when we'll far exceed the cooling load. However, that's not much of a concern for the opposite scenario in which we oversize for heating to meet the cooling load. We can add auxiliary heat, such as electrical heat or natural gas in dual fuel setups, to help us meet the heating load; we don't have those same options in cooling. Variable-capacity systems can also be beneficial in scenarios where heating and cooling loads are massively different. Bryan is excited about future opportunities for standby cooling and heating capacity, such as in the case of a heat pump heat recovery chiller system with buffer tanks. In the meantime, we have to design for vastly different heating and cooling loads and may have to oversize for one or the other.   Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.  Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android.   Subscribe to our YouTube channel.  Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

Dean talks about tankless water heater systems and the different BTUs (British Thermal Unit) that they come in. Dean advices a caller about fences around a garden that will provide a good amount of space. Dean discusses the city of Palos Verdes in California and its critical landslide crisis the city is experiencing. Also, on natural disasters and the threats that continue to hit the world every year and the importance of planning ahead.

In this short podcast episode, Bryan answers a listener-submitted question: How do inverter air conditioners work? Inverter-driven systems have variable capacity to match loads. We can provide cooling or heating BTUs to match the needs of the space without overcompensating or undercompensating and causing temperature swings. Load matching also helps us get better efficiency out of the system. High-humidity climates also benefit from load matching, as equipment doesn't dehumidify well unless it has been running the entire time. When set up and designed properly, variable frequency drives (VFDs) improve comfort, efficiency, and even dehumidification. You can "overclock" your compressor to get more BTUs out of it without oversizing, particularly when you have high heating loads due to the cold weather. Inverter-driven equipment takes AC power in, runs it through a rectifier circuit, and turns it into rough power that resembles DC power. The current is then smoothed out and goes through the inverter bridge circuit. Unlike an analog AC wave, we rely on pulse-width modulation (PWM) to simulate three-phase power and control the motor speeds according to a space's needs. We typically troubleshoot residential inverter-driven equipment by following the manufacturer flowcharts and possibly by communicating with tech support. Commercial VFDs are external to the motors and tend to be a bit more universal rather than manufacturer-specific.   Watch the livestream about VFDs & inverters with Matthew Taylor and Corey Cruz HERE, and you can also watch the livestream about cold climate heat pumps with Ross Trethewey and Russ King HERE. Learn more about NCI's High-Performance HVAC Summit at https://www.gotosummit.com/.  Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.  Purchase your tickets or learn more about the 6th Annual HVACR Training Symposium at https://hvacrschool.com/symposium. Subscribe to our podcast on your iPhone or Android.   Subscribe to our YouTube channel.  Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In the 194th edition of Too Noobs, the guys discuss a bizarre request from the Paris Olympic Committee involving units with 12,000 BTUs of raw cooling power! Then, more silliness in the world of business as Coldstone Creamery faces a class action law suit and Wells Fargo fires 12 "mouse jigglers" and Harvard goes all "National Enquirer" involving aliens. Finally, the guys put together their own "Mount Rushmore" of Philly athletes for the city's four major teams.

In this short podcast episode, Bryan talks about when to switch to emergency heat. He talks about coefficient of performance (COP) and how it's a deciding factor when to run emergency heat, which is when a system ONLY runs the backup heat; it doesn't use it as supplementary heat. When we have a heat pump with backup electric heat, we shouldn't ever rely just on emergency heat; we want the heat pump to run. Electric heat is just designed to supplement the heat pump's heating because it's inefficient. Hybrid or dual-fuel systems can use gas or hydronic fuel-based heat, and they work well on their own (such as if the heat pump is broken). You can't usually run the fuel-based emergency heat at the same time as your heat pump, so it makes sense to run just the emergency heat if it is fuel-based. The thermal balance point is the point at which the heat pump can no longer keep up with the heating load by itself; the temperature in the space will start to drop, but the heat pump will still produce heat. The thermal balance point can give us a clue about client comfort, not efficiency. COP is a measure of efficiency, and an electric heater has a COP of 1. A heat pump with a COP above 1 saves energy (compared to using just electric heat). COP is the heat delivered in BTUs divided by the energy supplied; it's a ratio.   You can read the "Good COP - Bad COP" tech tip at https://hvacrschool.com/good-cop-bad-cop/.  Learn more about the 5th Annual HVACR Training Symposium at https://hvacrschool.com/Symposium24. If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE.” Subscribe to our YouTube channel at https://www.youtube.com/@HVACS.  Check out our handy calculators HERE or on the HVAC School Mobile App (Google Play Store or App Store).

Mohamed El-Erian, Bloomberg Opinion Columnist, guests hosts the show and says the 'enormous volatility' in the bond market needs to be corrected in order to restore the Fed's credibility. Stephanie Kelton, Stony Brook University Professor of Public Policy & Economics, says the Fed has effectively put fiscal policy on autopilot. Steve Chiavarone, Federated Hermes Head of Multi-Asset Solutions, describes the Fed's policy trajectory as headed for a "rocky landing." Stephen Schork, The Schork Group Principal, says traders have become skeptical about supply levels of oil and jet fuel heading into a major travel season. Jeannette Lowe, Strategas Managing Director of Policy Research, says the meeting between President Biden and Xi Jinping won't change the dynamic between the two countries in a major way. Get the Bloomberg Surveillance newsletter, delivered every weekday. Sign up now: https://www.bloomberg.com/account/newsletters/surveillance  Full transcript:  This is the Bloomberg Surveillance Podcast. I'm Tom Keene, along with Jonathan Farrell and Lisa Abramowitz. Join us each day for insight from the best an economics, geopolitics, finance and investment. Subscribe to Bloomberg Surveillance on demand on Apple, Spotify and anywhere you get your podcasts, and always on Bloomberg dot Com, the Bloomberg Terminal, and the Bloomberg Business App. Why don't we move on to what doctor Olrium cares Mohammed, We've got to sit on crude, the idea that crude has essentially collapsed into a bear market, down more than twenty percent from the September highs. We spent this week talking about soft lending, hopes and dreams. Do we have to start thinking about an economic downturn in the not too distant future, well some of them. Some people are talking about this. I mean to see oil prices down more than twenty percent from the highs at the time that there's a conflict going on in the Middle East. It's quite quite and that's feeding into the soft landing. And we're going to talk a lot about this. But the market has now fully embraced not just that the fat has finished this hiking cycle, which I think is correct, but that we're going to see deeper and deeper cuts next year without a recession, and that's the critical assumption that's now built in across markets. I want to get the money question out of the way right away. As CEO of a major two million employee company in America called Walmart, yesterday brought up a d word deflation seared into the fabric of Cambridge, Oxford in the London School of Economics as a study a British deflation of the thirties and forties. America has never faced that have they They haven't, and we've had Japan recently. And the problem with deflation is it discourages people from buying today. However, I want to stress the US is deflation in certain products, food being the primary example, and that's why Walmart we decited it. We don't have general deflation, and I doubt we're going to have general deflation. I mean, I look at the an inflation question and it is a vector of disinflation in place. Clearly we see that. What is your optimism of getting back to John Williams two point zero percent? Richard claired is two point x percent. I think Richard is more likely to be right than John. I think we're going to get stuck in the high twos, and the FED is going to have to make a very difficult decision. Does it live with inflation higher than target because the target itself is too low, or alternatively, does it acknowledge that two percent is the right target and then crushes the economy. I think that's the choice the FED is going to have to make. What's your best guess right now? I think it's going to go for the format. I think the FED will understand that pressing two percent inflation in a world where there's insufficient structural supply is not the right thing to do. So where do you think it leaves this bond market? Let's go through this course right now. We've got a two year at the moment at about four eighty, a ten year at about four forty. Think about where we've been in the last month of Summerhammet had a two year pushing five twenty five high set of cycle, ten year through five percent high set of cycle. How are you thinking about what we come back down to, bearing in mind what we're pricing for right cuts next year. I think we've come down too far to tell your truth. I understand why some people think that we're going further, but if you look at the inflation dynamics, that's harder to get unless we go into recession. If we go into a recession, then the stock market is mispriced, so you can't have both at the same time. Has something changed? I think this is what it goes back to. Has something changed post pandemic? That means we don't go back to the pre pandemic world. That debate, I think is still on going. Mohammed, where'd you come down on it? I think the pre pandemic world was exceptional. It was a world of qui. It was a world of insufficient aggregate demand. And when you have insufficient aggregate demand, you can push into the economy as much liquidity as you want because you won't get inflation. That world is gone. We're in a world now of efficient, inflexible supply, and that's a very different world. Sometimes talk about over the two hours with doctor Olian is growth economics. I've been telling a lot of people to remind themselves of a guy named Solo at MIT in nineteen fifty six and the near religious experience of trusting and growth. Can you state that we have a new American growth economics of what some people are indicating is improved productivity, improved efficiency. So you know, I listened carefully to our friend Mike Spence, the Nobel Prize winner, because he spent so much of his career studying studying with John Hicks, I mean correct majesty of that alone, and he is incredible and his insights are really valuable. And his bottom line is that most countries have to evolve to a new growth model. The US is the most advanced in that evolution. I think the three important piece of legislation that the administration passed last year were critical in that perspective. So if you look around the world, whether it is the US, Europe, or China, all three have the challenge of evolving the growth model, and only the US is doing it seriosly right now, too gloomy? We no, Lisa isn't here, so we're not too blooming. No. I think we recognize that the world is evolving. This is a different global economy, this is a different domestic economy, and policies have to evolve accordingly. What worries me and I think the concern of a lot of people listening to this conversation on going at home is you just have to go about forty eight hours and we're talking about disinflation, soft landing, hopes and dreams, and then twenty four hours, forty eight hours later, you look to Burberry a collapse in luxury. You look to Walmart a warning about the US consumer. You look to Crew entering a bear market, and all of a sudden, we're talking about a slowdown and maybe even recession. Mohammed. The bond market is stuck between all of this. We're seeing double digit moves day after day in either direction. You've written about this extensively in the last few months, about a bond market that's lost its anchors. Is an economic slowdown sufficient to regain some stability in fixed incoming treasury specifically? No, I mean I was really struck yesterday. I was watching you when you said, guess what, we had the same level of the tenure as we were a week ago, and my reaction is, how could that be? So I looked it up and you were right. Now. Most people feel that this week is very different from last week because of the inflation print that we've had. We still lack one of the three anchors. You either need an economic anchor, or a policy anchor, or a technical anchor to the bond market, and we've lost all three. So these moves are going to continue. The thing that has really impressed me is that nothing has broken. If you had told me a year ago we're going to see this incredible volatility and the most important market in the world is the benchmark for so much else, and yet nothing will break, I would have said that's impossible. So the resilience of the functioning of the market has really impressed me. The financial system, and of course we had the shock and the United Kingdom off a derivative structure in the pension plans, but to lead to this and measured in standard deviations, which is how fancy people like Alarian think. We had a six seven eighth standard deviation and thereat moderation. There's a hope in prayer we get back to that trend line that's in years. How many years are do you think we heal this great bond tobacco. I think it's going to take time. Remember we've had ten exceptional years where the bond market was distorted, so I must say back to vulgar We've had, you know, thirty exceptional years. But the shift to an artificially low interest rate and ample and predictable injections of liquidity fundamentally changed the bond market and that is going to take time to recover from. Did you and Bill Gross get a free ride because you were within the Great Moderation? Was that such a structural like a free life? But the PIMCO when you build it, you invented it with Bill? Was it? Was it easier because you had the Great Moderation? Or just just think of investor. Investors care about three things, returns, volatility, and correlations. And we went through a period that because liquidity was being injected into the economy over and over again, we got high returns, we got virtually no volatility, and the correlations broke down. But in your favor, you made money on your risky assets and you made money on your risk free acids. At the same time, there was a great time. We took it to be normal, but it was truly exceptional. And we're going back to a world that I think is more like what we had before the Global financial crisis. It's going to be so hard to shake this, Mohammed, because we've got a whole generation, in fact, a couple of generations conditioned by two major shocks, the financial crisis and the pandemic. And we know how the FED response to major shocks. What we've all forgotten is how it responds to just normal economic downturns and upside pressure on inflation. How do we start to get into that all over again? Yeah, And this is where FED credibility and better communication is better. John, It's really striking that the market is willing to take on the FED on a price that the FED controls. The FED totally controls the policy rate, and yet the market does not believe what the FED is is telling us. And it is really striking because we have got to restore FED credibility otherwise we're going to continue with this enormous volatility. Your thoughts on what's percolating into the end of the year in the Q one twenty twenty four. Are there shadows in private equity? Are there shadows in the new non traditional finance? Yeah? So, one thing that I don't think is pricing enough is that when you move from the banking system to the non banks, you change the lags in the system. So you see this with commercial real estate. Everybody recognizes that the re financing of a trillion plus of assets is going to be tricky, but because it's over time, we don't worry about it. Everybody recognizes it as a maturity wall in the corporates out there, but because it's over time, we don't worry about it. If it were all within the banking system, we would have worried about it really quickly. So the move from the banks to the non banks has extended this Michael Spencer's shore. The regulatory lag here is tangible. This is the uncomfortable calm note as well, just to borrow that phrase from a long time ago from the Bank of International Settlements, This maturity wall is out there in twenty twenty five, and it's just this feeling mohammed that we don't have to think about it. But at some point we have to start thinking about it, don't we, right? But you know what, you enjoyed the journey before you get to a destination. Oh, here we go, and you want to give us some good news bad news, bradmos out here, No, no, I totally understand, you know, because momentum is really important, and you want to be exposed to this market. And I think most people have much more of a tactical mindset than they do of a strategic or structural mindset, and investment has become very tactical. Mohammed's set in the Town's great to have you with us, by the way, it is without questions, through the pandemic and literally over the last five years she has had a greater influence on the debate of our American economics and anyone out there. Out of Sacramento, Cambridge and a tour of duty at the very liberal New School of Social Research, Stephanie Kelton joins us now from Stonybrook University. The book is a deficit myth. In the three letters, are MMT professor honored to have you on Bloomberg's surveillance? Are we unraveled? Stephanie? The worry here of the annual interest expense the return of a real interest rate? Are we unraveling as we roll into twenty twenty four? No, I mean we are. The Fed is effectively in a sense, putting fiscal policy, a big part of the federal government's budget on autopilot. And it's really tantamount to running, you know, a pretty regressive fiscal stimulus. That's what the rate hikes are actually doing. If we don't like it, Tom, there's a pretty easy way out of it, which is to say, if the rate high are pushing up the amount of money the federal government is spending to service the debt, interest expenditure up by hundreds of billions and trillions of dollars over time, remittances from the Fed to the treasury have collapsed. All of this is adding to the deficit, which triggers more issuance of treasuries, which puts you in what is essentially just a cycle now of higher rates, higher deficits, higher debt, and it will continue for as long as the Federal Reserve holds in this position with a deficit. The debt and the deficit is from the new school Heilbrunner and Bernstein classically talked about years ago. But the arch MMT criticism is, you're handing monetary decision making from the acuity and date driven data dependency of a FED over to the legislative branch. Can we trust the legislative branch to prosecute MMT given where we are right now? Well, okay, I'm glad you mentioned hal Brunner. He was a professor of mine when I was there in a really terrifically bright person Tom. MMT is a description of the monetary system that we have today. It is a floating exchange rate fiat currency. Love it or hate it, it's what we have. MMT describes the monetary system that we have and the mechanics of government finance. It's not a policy proposal. It doesn't propose changing anything. It's describing how things already work. So think about what Congress did with the onset of the pandemic, drafting first the Cares Act that two point two trillion and then the big Omnibus Bill, a nine hundred billion dollar package, and then the Democrats came in and did their one point nine trillion dollar American Rescue Plan Act. All of that was deficit spending. We didn't give Congress any new permission to do anything. We just described how it all works. And it helps to unders stand why Congress was able to muster that kind of fiscal firepower when so many economists had previously said that when the next crisis came, we would be unable to act. People like Larry Summers said because of the Republican tax cuts in twenty seventeen, that we would be living on a shoe string for decades to come. Those were his words. That we wouldn't have the ability to spend money because of the deficits, because of the debt. That was wrong. Congress has the power of the purse. MMT recognizes that, and MMT says, listen, this is an extraordinary power they have. They need to use it responsibly, and that means thinking before you move forward with bold spending programs about the inflation risk that's associated with those spending proposals. And that's the piece that was missing. The one thing you didn't mention in you know, my tour of going through my education and so forth, was the time I spent in the US Senate as the chief economist for the Demomocrats. And I'll just say very quickly and i'll stop that. When I was in the Senate, my great frustration was being surrounded by members of the Senate on both the Republican and the Democratic side, who were drafting bills trillion dollars of infrastructure, talking about medicare for all and all these other things without ever mentioning inflation risk, I couldn't believe it. So MMT would have us do things very differently when it comes to the way we approach the federal budgeting process. It's inflation that you have to watch for, Stephanie, it's Mike McKee. If wishes were horses, then beggars would ride. The idea that Congress is going to think about anything before these start passing bills is probably not going to happen. So I'm wondering, after all this is there a limit in the sense that at some point we aren't going to be able to respond fiscally, for one reason or another, to some sort of crisis because all the money is going into debt payment instead of instead of going into additional spending, and the way we're set up now, we got to pay those bills. Okay, So two things I'll say. One, I've been hearing this my entire life. You'll remember that Chairman Volker had into straights up pretty high. And meanwhile, you know Ronald Reagan did two massive tax cuts and massively built up the military. So again, if Congress has the will to pass legislation, the votes are there, the money is there, and I'll just say I don't think it's right to say, actually that we can't trust Congress to rein it in. Remember, the so called Inflation Reduction Act was Congress's effort to say, listen, we don't want to continue passing legislation given the inflationary environment. So we want to get revenues up, we want to control costs. We're going to negotiate prescription drug prices. That was all Congress taking, you know, careful steps. I think are you would you suggest, Stephanie, whether it's a Republican or Democratic, to houses that we can have budget responsibility. Do you see displayed budget responsibility in the modern Congress and Senate? Well, Tom, what I'm saying is that if we were doing things the way I'd like to see them done, instead of handing proposed spending bills to let's say, the Congressional Budget Office and saying, give me feedback on this legislation I have drafted. Tell me if it's going to increase the deficit, tell me whether it adds to the debt. I don't think that is the most important feedback. I think it would be much better to have CBO and or other agencies evaluate proposed legislation on the basis of inflation risk. But we don't do it that way, right, So I think that that would put us much closer to having a Congress that operates with fiscal responsibility, i e. Inflation risk at the heart of what it is. Okay, can you and say a critic of yours, John Cochrane, the great conservative economists, Can you and John Cochrane get on the same page and say we need a Simpson Bulls reducts where in the initiation of that panel we actually demand that we get something done. No? Uh, sorry, sorry, but no is the answer to the question. You would have to first convince me that there is some sort of looming crisis that necessitates the formulation of a fiscal commission. And I don't believe that we are facing that kind of crisis. Inflation is coming down. So if you approach things the way I do, which is to say, you know, are we at risk? Is the budget posing and inflation problem, then let's get at it and let's figure out what adjustments need to be made to ensure that we aren't putting ourselves at risk of trenched inflation well above the Fed's target. I don't think that's the future facing fascinating and controversial Professor Calton. Thank you so much, Stephanie Calton. I can't say enough about how refreshing to any and all her book. The deficit myth is she is at Stonybrook and you know her from the phrase MMT right now with us and Mohammedalarian with us is a great thrill today. He is at Queen's College in Cambridge and he's interested in the asset allocation of their endowment. That's the campus that Steve chiveron had a multi Asset Solutions that federated him as Steve. This is a lonely bull market. How do you reallocate into the end of the year. Well, you had to get ahead of it a little bit. We were adding over the course of the summer when it was uncomfortable on the idea that markets like FED pauses and they price in soft landings even if a soft landing doesn't materialize, because when the FED pauses, invariably it's on suspicion they've gone too far, not on confirmation. And so the data that's available to you is a FED that's no longer hiking and an unemployment rate that's still low, and that's been the case throughout history and it's the case today. And so finally, with the bond market having broken, we're getting that FED pause rally and that can be powerful, Tom. You know, historically those are nine month events, and you can see the equity market up fifteen twenty percent. And interestingly enough, and this is something that's been on our mind, the equity market has hit an all time high each of the last five times that the FED has paused. Now four of those ended in tiers, but it still happened either way, and we think this rally has legs. I think the jury on whether or not, you know, how soft this landing is next year, is still very much out or for the time being, we think this rally continues. Steve, what are you looking at to determine this whole macro question of has the FED not just paused, but it's going to stop cutting and kind to do so within a soft What are the key variables you look at. We're calling them the five Games of Chicken, and it's that corporate refinancing wall. You're going to have about sixty percent of corporate debt come due between twenty four and twenty eight, So what percentage of that is going to face materially higher rates, and what does that do to company earnings? That's number one. Number two for small businesses, they've already seen their debt repriced because it's variable rate bank debt. So how many quarters of high rates can they survive? On the consumer negative or I'm sorry, real income growth is finally turned positive, But how positive does it get? And does it allow a consumer to de lever again, rebuild savings and continue to spend eight hundred and seventy seven billion dollars of bank deposit outflow? What does that do to restrict lending? And then what percentage of the federal debt, a third of which becomes due this year reprices to a significantly higher rate. Those five things we think, if they were to all go perfectly, you'd get this immaculate soft landing. I think that's unlike we think what's more likely is a kind of rocky landing where inflation stays stuck at three rates, stay hi, there's some slow down, and it's a kind of malaise. It's a single digit equity environment with a real risk that something breaks and you get into a classic recession. So it's really between that rocky landing and then a kind of a classic recession break that we think is most likely to happen. We're in the rocky landing camp at least for now. And what do you say to those who say, of your five factors, it's one in five. It's all about supply. It's all about who's going to buy all the supply. I think that's big. But where I would focus more acutely is on the nexus between banks and small businesses. The banks. Again, if there's eight hundred and seventy billion dollars less of deposits, that's eight hundred and seventy seven billion less of loans that can be made. And small businesses are reliant on that, and they're not facing a maturity wall. They've already seen it, and so if something's going to break, we would look there. So we're spending a lot of time focused there. It also has a bias towards larger cap companies within our asset allocation. Steve, let's get to the quote that shook up this market in the last twenty four hours. TK talked about it at the start of the program. It came from the Walmart CEO. We may be managing through a period of deflation in the months to come. Steve, when you heard those words yesterday, what was your response. I think the word deflation is probably a little strong, But I do think that there could be a lot more disinflation than what we've what we're expecting. If you look at the areas of the economy where you've seen disinflation so far, it's goods prices, it's food prices, its energy prices, It's a lot of stuff that quite frankly, can be explained by COVID normalization. Big interest rate sensitive purchases have not really seen the big deflation that you'd expect r. I mean, home prices are still relatively buoyant. Go and try to buy a car. It's not exactly a value exercise these days. And so I think as the rate heights filter through the economy, there is more disinflation in the pipeline, and I think you could see a at some point in twenty four go very quickly from worrying primarily about inflation to worrying very much about growth and the employment markets. And that could switch on a dime. And it's something that keeps us in a kind of humble position. Well states is the same true for investors just to jump in. You mentioned that as a federal reserve can make that switch. I just wonder how quickly investor start to make that switch, and whether we can get some divergence between what's happening with bonds and what's happening with stocks. I think what you do is you pull up some charts and you look at them. Historically, you know, unemployment takes stares down and elevators up. The equity market takes stairs up and elevators down. Particularly if you are headed towards a recession. You don't gradually shift your view in the late part of a cycle. It happens very, very swiftly, and that's why as an investor you have to prepare for that. You start to lengthen duration, you start to upgrade the quality of your equities. We like companies right now that have strong balance sheets, strong cash flow generation, low external financing, and you move in that direction so that if it does move on a dime, which historically it does, you know you're you're not left out in the coal stave. What if I get you thoughts, it's going to catch up. Have a good weekend, my stave Chevron the Federated terms, Stephen Schory, So principle of the short group saves us. Now, oil disinflation, Stephen, how does New York Harbor adjust to oil deflation? All the little idy busy things jet fuel, diesel, distillate, how do they adjust as collapse in oil. Yeah, it's a really interesting question, Tom. We're trying to figure it out as we speak right now. When you look at the spread action between gasoline on the flub with curb and inventories, seemingly there is enough oil power, enough gasoline in your harbor. The neok Carver just want to point out is important because that is the delivery hub for the mercantiles, diesel and gasoline contracts. Now, when we look at overall supplies relative to demand, we're looking at about twenty four days worth of supply of gasoline. Now. That is normal, That is spot on to the five year average, and it's slightly above a year ago. The problem now is that traders are skeptical. They are pricing in a premium on the front end of the curve, which is a clear signal that someone out there is concerned about these supplies, regardless of the fact that we do have all of this space worth to supply? The other big issue here is jet fuel. Right now, we don't have enough jet fuel stocks are extremely low and as we look forward to next week, we expect this or I should say Triple A expects us to be one of the busiest travel seasons for Thanksgiving of the past twenty odd years. So when we look at the rising demand, when we look at the spread action, something here is afoot. It doesn't line up that the spreads are saying one thing, ie, there's not enough supply, regardless of what we're actually seeing in a weekly inventory reports from the EIA. So Stephen, the SANDI is a frustrated with the price section, as you can imagine. I just wonder if they're frustrated enough to change policy again, do you think they are? It's really interesting and it is really conundrum that, to be honest, I am perplexed that the market never really priced in any sort of risk premium with regard to what is happening now in the Middle East. And let's be clear on this. This is a war not between Israel and Hamas, but it is effectively a war between Israel and Iran. Given that we're fighting that is to say, Israel's fighting Amas has Blah and the Huti's all backed by Iran. Now that is a pretty scary proposition with Iran's ability to halt the flow of oil coming out of the Persian go free straight her moves. So yes, there clearly is a head scratcher here that we have this huge risk on supply, but the market refuses the price that in regardless, we're focusing now on the demand picture. And yes, if you're Sali Radio, if hey, if you're a Texas and you are trying to produce and you're looking at this price action, yeah you are frustrated at this point. But I want to say here, based on our modeling, we're likely at the bottom of the market right now, given this situation around the globe and the inbalance now between supply and demand. So, Stephen, do you think that the Saudis will weight this out or do you think the Saudis will be on the phone to the Russians and any other ORPAC plus member that's willing to participate in another cut in production. Yeah, I do think that there is a concern that we'll see further cuts Already the Saudis, Russia, have extended their cuts of volunteer cuts to the end of the year. We've seen now in oil prices, unlike the product prices, we've seen an absolute collapse in the front end of the curve. So we've now actually on the noomics. We've moved into a situation called contango, meaning that prices for nearer term delivery are now below that of prices for longer term delivery. So this is a clear takeaway that right now from an oil standpoint, fundamentals are extremely weak, and I would suspect that we'll see the chances are going into the quarter OPEC plus either extending the cuts or increasing those cuts into the new year. Steven Shark over the arc of Bloomberg surveillance twenty years. One of the great shocks has been America's success with hydrocarbons into the new year. Are we energy independent? No, not at this point. Now. I want to point out that we were energy independent a few years ago. In keeping in mind, energy independence does not mean we do not have to import a BTU from anywhere around the world. We wore a fluid trader in the world. We wore the dominant krudeoil producer in the world, and we wore the swing producer. That is so for all intents and purposes, we wore an energy independent when it comes to hydrocarbons, and that is just a shout out to how well how efficient the industry has grown over the past fifteen to twenty years. But given current policy right now, no, we're not energy independent and going into the new year, big risk is that we are playing a zero sum game. That is to say that we are taking off dispatchable BTUs natural gas, nukes, coal faster than we can replace them renewables. That's not opinion, that is fact. The regulators are telling the government this is so, and yet the government is still going ahead enforcing these retirements where we don't have enough power. So everyone out there get used to this and get ready. There's going to be a huge jump in volatility over the next two years, a huge jump in pricing for electricity and for other alternative BTUs because we're quite not ready for the transition that the government is forced in upon the industry. Stephen with a big one is Stephen Schork at the Short Group. A lot of happy talk this week. Jeanette low Strtigas wrang in on this meeting between Biden and Jain, saying this the meeting does not change the trajectory of US Chinese relations. Tom the US will continue to push for de risking or decoupling with China in order to protect this national security interest, and China will continue to push to develop a multi polar world against US interest. Janet Low there join us now from strtigis MS Lord, Jeannette. I look at where we are, and of course the major question is what's the next step. What is the next step. Should we look for President Biden to visit China. Yeah, that's probably, to somewhat extent unlikely. I think maybe if we look back at last year, we had a meeting between Biden and She in November of twenty twenty two, and you know, not much occurred out of that. After that, a couple months later, we had that spy balloon flying over Montana, which then ruptured relations again. So I don't necessarily think that there's going to be a lot more steps moving forward. It was also very interesting to have the Defense Secretary at the exact same time in the Philippines talking about continued coordination while this APEC and the Biden She summit was happening in San Francisco. So I think this is going to be about trying to lower the temperature, trying to make sure we have continued communications. As you guys have mentioned, having she he wanted to he's having some domestic issues. This is also a good opportunity for him to kind of have a reset. But ultimately, I think that the two sides are going to continue on their trajectories and this is not going to change the overall path. What it is going to do is just make things a little bit easier in the short term. We have an election coming up in the US. We don't want to continue tensions with the China. But at the same time, if Biden was to be too conciliatory towards China, we have a whole lot of hawks in Congress who would then pounce him on that. So Janetta, I very much agree with your analysis. Can you take it one step further? How easy is it to de risk without decoupling? Right? And I think that this is part of the issue too. I mean, you have the US has been trying to make strides to de risk from China, but it's going to take quite a bit of time. Obviously, We're quite reliant on China for supply chains, for critical minerals, for a whole host of things, and so it's going to be very difficult to actually move those pieces away. And so I think that trend is in place and you're going to see it continue over the next couple of years. But that also means that to some extent, you almost need a daytunt at the highest level so that you can build these pieces out from the bottom and ultimately get to that de risking. I don't think decoupling is probably where the ultimate goal is, but it is really about trying to protect US national security interests and making sure there is reduced dependency on China. And I do think that you are seeing that you regardless of the fact that you have to make choices between how you align with US and China, there is an effort or there is a realization across the globe that having too much dependency on China is not a good thing either. And from Chrona's perspective, de risking involves building little pipes around the US at the core of the system. How far can they go into building basically an alternative global system. So this is obviously something that they have been working on, and they would like to continue to accelerate that. I think the one thing that is important is I think the fact that the US is not doing this alone is important that they will actually be more successful and actually trying to at least move supply chains. China is still going to be involved, China is still going to try to work with their partners in Asia to get around some of those pieces. But the other thing is that is if you look at China trying to build this multipolar world, they have been doing that over the course of a couple of years. They're trying to obviously move away from the US dollar, They're trying to get other countries to do the same. But if you are looking at China also being in a place of having economic weakness, that also is not necessarily conducive to them actually being the leader of that movement. So there's a lot of things that have to be worked out on both sides to actually reach their ultimately ultimate goal. And I think that's why we're going to kind of see a I don't want us to use the term muddle through, but kind of a muddle through scenario where they continue down their path but there is obviously some need to be conciliatory in the interim quickly, here Jin ed and I've been guilty of this all week. I have failed and taken my eye off Ukraine, Ukraine in this cold December. What will that debate, that study look like. Right, So this is the US does not have a lot of military aid left to provide to Ukraine at the moment unless Congress appropriates more funding. And so the spring offensive has not necessarily produced the results that the both sides were looking for. We're going into the winter, which makes it more difficult for there to be progress on the battlefield. Think that you will see an effort in Congress to try to come back from a Thanksgiving holiday and pass Biden's National Security Supplemental, which would provide aid for Ukraine as well as Israel and Taiwan and the border. But that is something that they still are trying to find a solution on. They need to figure out whether or not they can add border policy changes in order to get Republican support for that bill. But if we don't get aid to Ukraine over the next couple of weeks, there is probably going to be a strong hole put into Ukraine's defenses because they really do need more money. You obviously have Europe also supporting them, but Europe has been struggling to get some aid packages passed, some munitions given to them as well, so it's it's been put on the back burner. But I think you might start to see more discussion over over the next month in Congress. At least this is a fine We're going to seek out it to the new year. Jeanette low A shatigas Jeanette, thank you. Subscribe to the Bloomberg Surveillance podcast on Apple, Spotify and anywhere else you get your podcasts. Listen live every weekday starting at seven am Easter. I'm Bloomberg dot Com, the iHeartRadio app, tune In, and the Bloomberg Business app. You can watch us live on Bloomberg Television and always I'm the Bloomberg Terminal. Thanks for listening. I'm Tom Keen, and this is BloombergSee 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In this English lesson, we will visit my brother's backyard, and he will teach you some terms native English speakers use when talking about heating their house in winter. He will talk about what a cord of wood is, how he heats his home in the winter, and how he sells his extra wood.

Ready to unravel the fascinating world of heat pump water heaters and the influence of ducting on these devices? We promise, this episode will equip you with insights that can potentially save you a great deal of trouble. We kick off by exploring the common practice of ducting water heaters to the outside and why it might not be required in unfinished spaces. Also, discover how heat pump water heaters can be a game-changer in commercial places where there's an existing heat source.Ever wonder how humidity levels affect the efficiency of heat pump water heaters? Well, we've got you covered! We take a deep-dive into the role of varying humidity levels, especially in humid regions like Minnesota, and how heat pump water heaters might still be beneficial without impacting your gas bill. We also discuss the relevance of the size of your furnace and the BTUs per hour of the heater. We wrap up with some invaluable tips on ducting and the importance of reading the installation instructions. So, gear up for this enlightening roller-coaster ride that will leave you with a wealth of knowledge on heat pump water heaters and ducting.Send us your feedback or topic ideas over on our social channels!Eric Aune @mechanicalhub Andy Mickelson @mick_plumbCheck out our website: mechanical-hub.com

In this short podcast, Bryan talks about air changes per hour, also known as ACH, and what it means in HVAC design and indoor air quality (IAQ) discussions. ACH tells us how frequently the entire volume of air in a room or structure is replaced; we are referring to the cubic feet of air leaving a space and then being replaced within that same space. If we have a balanced number of cubic feet per minute (CFM) of air supplied to and returned from the room in one hour, we would multiply that CFM by 60 to get the ACH, as there are 60 minutes in one hour. ACH should not be used to calculate heat loss and heat gain, even though BTUs are moved with air. ACH is a practical guideline for HVAC design. Ventilation needs will vary based on the purpose of a room and the number of occupants in it, and ACH tends to be a more important factor for determining how we can meet ventilation needs in commercial and industrial structures than in residential structures, in which we mostly rely on Manual J calculations of sensible and latent BTU gains and losses. However, we should not confuse ACH with outdoor air ventilation requirements as described in ASHRAE Standards 62.1 and 62.2. ACH also comes into play when it comes to infiltration and the tightness of an entire structure. When used in the context of blower door testing, the ACH will tell us if a building meets tightness standards. There is also a term called ACH50, which refers to air changes per hour at the standard pressure for blower door testing: -50 Pascals. ACH50 does not reflect ACH under natural conditions (ACH natural).   If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

This podcast episode is one of Alex Meaney's HVACR Training Symposium presentations: HVAC Design Backwards, Forwards, and In Between. Load calculation factors in all three means of heat transfer: conduction, convection, and radiation. It doesn't directly tell you the tonnage; it just tells you how many BTUs (sensible and latent) are entering or leaving a structure. When designing systems after doing load calculations, we need to be mindful of industry standards and their pitfalls, as well as the climate conditions and the difficulty of obtaining manufacturer data. Equipment selection by tonnage is only part of the picture when it comes to HVAC design; we also need to factor in airflow and duct design, especially duct sizing. However, many rules of thumb and poorly explained terms are counterproductive to a thorough understanding of HVAC design. In some cases, the best way to design a system may seem "backward," especially when starting with blower selection instead of ductwork. Duct design is particularly difficult, especially when software identifies several problems with designs that seemed to look good on paper. However, the software points out areas where you can adjust the duct size and manage restrictions to allow the fan to do its job without being derated by friction. Alex also covers: Insulation and efficiency ratings CLTD Groups Tricky radiant gains and losses The relationship between BTUs and tons AHRI ratings Shortcomings of Ductulators in duct design education Pressure vs. friction in ductwork Static pressure vs. velocity pressure Measuring friction with pressure Regulations vs. reality Furnace static pressure range Differences between commercial and residential duct design Oversized and under-ducted systems Variable-capacity systems ACCA manuals and tables   Check out Alex Meaney's consultation business at https://www.meanhvac.com/.  Learn more about the HVACR Training Symposium or buy a virtual ticket today at https://hvacrschool.com/symposium. If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

Gary Klein is in hot water and that's a good thing. Hot water is the often-overlooked aspect of energy use in our homes and buildings and that makes zero sense. Energy for water heating is either the second largest, or in some cases the largest single energy use and does not get enough attention.As if that were not motivation enough, hot water is also the place where convenience and energy savings align perfectly because no one wants to wait for hot water and no one (arguably) wants to needlessly waste energy. With all the product based attention on ways to heat water - air-water heat pumps, electric, gas, tankless - it may surprise you to learn that once you have hot water what you do with it can matter even more. Join us in this action packed interview with Gary Klien, a true national treasure in the realm of water heating and distribution as he applies simple logic again and again to break down the How and the Why of having hot water arrive efficiently When and Where you need it. Gary KleinGary Klein is the principal and founder of Gary Klein and Associates. Every day, across the United States, millions of gallons of water and millions of Btus of energy are lost in our hot-water systems through a combination of structural and behavioral waste. Ours is an era where efforts to conserve resources have led to ever-increasing complexity, be it in water heaters that are harder to understand and use, be it in the smart grid and electric meters that tell the utility all about our behavior. Given human nature, it is our responsibility to provide the infrastructure that supports efficient behaviors.Gary Klein is tackling this issue in a different way, rejecting complexity and concentrating on elegant simplicity. He works to change building codes and to get architects and builders to use plumbing systems that, by their design, deliver hot water quickly and with minimal waste. He has looked at the structural and behavioral waste and believes great resource savings are to be had in both. When he gives a presentation, it's impossible to doze in the back row. He calls on people at random to serve as props, marks lines on the floor in tape, makes people think, and makes them laugh. It works.TeamHosted by Kristof IrwinProduced by M. WalkerEdited by Nico Mignardi

In this short podcast episode, Bryan talks about TXVs and their impacts on energy efficiency ratings (EER and SEER). EER (Energy Efficiency Ratio) is calculated based on fixed conditions (an outdoor temperature of 95 degrees Fahrenheit and an inside temperature of 80 degrees with 50% RH). EER is a ratio of cooling-only capacity in BTUs per hour to the total electrical input in watts. SEER (Seasonal Energy Efficiency Ratio) is the ratio of an HVAC system's cooling output during a typical cooling season to the seasonal electrical input in watts. Both energy efficiency ratios use non-proportional units (BTUs to watts), but SEER is supposed to account for a wide set of conditions (even though the climates of regional markets can vary quite wildly). EER2 and SEER2 are new standards based on updated equipment testing protocols with more realistic static pressures. TXVs and EEVs can modulate to control the amount of refrigerant going into the evaporator coil. TXVs maintain a set superheat at the evaporator coil outlet, which it detects with a sensing bulb mounted to the suction line. These sorts of modulating metering devices can boost system efficiency by adjusting the amount of refrigerant it feeds into the evaporator coil. Underfeeding can lead to inefficiency, and overfeeding can cause system damage. Non-bleed TXVs shut tight once the compressor shuts off, which prevents refrigerant migration during the off cycle and pressure equalization, thus protecting the compressor and reducing the cyclic degradation coefficient. The compressor may have to start a little bit harder, but the effects of the hard shutoff can improve the SEER rating by about 0.5. TXV systems are, overall, more efficient than systems fixed-orifice metering devices.   Learn more about the HVACR Training Symposium or buy a virtual ticket today at https://hvacrschool.com/symposium. If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

This podcast episode is Nikki Krueger (Santa Fe Dehumidifiers) and Bryan's 2023 HVACR Training Symposium session about how we can optimize dehumidification and efficiency to create an HVAC design and humidity utopia. While we attempt to achieve comfort and high indoor air quality in humid climates, we may find challenges integrating these with the HVAC system and getting customers to understand the need for proper dehumidification. Older homes that are built "leaky" allow for uncontrolled infiltration and exfiltration, but newer constructions are a lot tighter and rely on mechanical ventilation to control where the outdoor air comes from and make sure it is properly filtered and distributed. We deal with both sensible and latent BTUs in a home, and we can't treat them as though they're all equal. Many high-efficiency systems have high sensible heat ratios (SHRs) and are designed to remove sensible BTUs very efficiently, but they're not adequate at removing latent BTUs. Ideally, we would rely on an A/C system or heat pump to dehumidify the air in cooling mode before adding a dehumidifier. However, some of the systems that are best equipped to handle high latent loads will be less efficient. If you wish to install supplemental humidification, the ideal design will have a dedicated return and tie into the main HVAC supply duct. Nikki and Bryan also discuss: Willis Carrier's real invention Strategies for reducing conductive, convective, and radiant gains Understanding relative humidity and dew point Design loads Electrification and energy efficiency incentives Adiabatic heating and cooling Single-stage vs. multi-stage equipment Dehumidification for ductless mini-splits Supplemental dehumidifier designs   Learn more about Santa Fe Dehumidifiers at https://www.santa-fe-products.com/.  Learn more about the HVACR Training Symposium or buy a virtual ticket today at https://hvacrschool.com/symposium. If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

A full quarter of global energy use goes toward heat that powers industrial processes. To provide clean industrial heat but avoid the variability often associated with renewable energy, a company called Rondo makes a thermal battery, storing renewable-energy heat in bricks. In this episode, Rondo CEO John O'Donnell talks about this breakthrough technology and the opportunities that thermal storage promises to open.(PDF transcript)(Active transcript)Text transcript:David RobertsElectricity gets the bulk of the attention in clean-energy discourse (this newsletter is, after all, called Volts) but half of global final energy consumption comes in the form not of electricity, but of heat. When it comes to reaching net zero emissions, heat is half the problem.Roughly half of heat is used for space and water heating, which I have covered on other pods. The other half — a quarter of all energy humans use — is found in high-temperature industrial processes, everything from manufacturing dog food to making steel or cement. The vast bulk of industrial heat today is provided by fossil fuels, usually natural gas or specialized forms of coal. Conventional wisdom has had it that these sectors are “difficult to decarbonize” because alternatives are either more expensive or nowhere to be found. Indeed, when I covered an exhaustive report on industrial heat back in 2019, the conclusion was that the cheapest decarbonization option was probably CCS, capturing carbon post-combustion and burying it.A lot has changed in the last few years. Most notably, renewable energy has gotten extremely cheap, which makes it an attractive source of heat. However, it is variable, while industrial processes cannot afford to start and stop. Enter the thermal battery, a way to store clean electricity as heat until it is needed.A new class of battery — “rocks in a box” — stores renewable energy as heat in a variety of different materials from sand to graphite, delivering a steady supply to various end uses. One of the more promising companies in this area is Rondo, which makes a battery that stores heat in bricks.I talked with Rondo CEO John O'Donnell about the importance of heat in the clean-energy discussion, the technological changes that have made thermal storage viable, and the enormous future opportunities for clean heat and a renewables-based grid to grow together.All right, John O'Donnell of Rondo. Welcome to Volts. Thank you for coming.John O'DonnellThank you. It's a great pleasure.David RobertsI am so excited to talk to you. I've been geeking out about thermal storage for over a year now, just wanting to do something on it, and there's so much there. And I find that unlike a lot of electricity topics which I cover, there's just not a lot of baseline familiarity out there among, let's say, normal people. So there's a ton to cover from the ground up. So I want to start at the highest possible level, which is to say, let's just talk about heat. Like in the clean energy world, electrical power gets a lot of attention, a lot of discussion, a lot of technological development.Everybody's got their favorites, everybody knows what's going on. But then there's also heat, which is the sort of weirdly ignored not so much anymore, but up till pretty recently ignored. So maybe just start with an explanation of why heat is important if you care about clean energy, why you should care about heat?John O'DonnellThank you. Sure. That's a great question. And that context you just provided is, of course, dead on. There's a really simple answer. Heat. Industrial heat is 26% of total world final energy consumption. Whether you are making baby food, or fuel, or cement, or steel, the manufacturing processes vastly predominantly use energy in the form of heat, not electricity. Globally, it's three quarters of all the energy used by industry is in the form of heat. Again, whether you're pasteurizing milk or melting steel. And the DOE has just created a new office focused on this topic. We're thrilled about it.Their assessment is that industrial heat is 11%, I think, of all total US CO2 I'm in California. Here in California, we burn more natural gas for industrial process heat than we do for electric power generation. And to a first approximation, as you just mentioned, no one knows that.David RobertsRight. So heat is a huge portion of final energy consumption. It's a huge portion of global CO2 emissions. So maybe give a sense of like, what percentage of total heat final consumption is industry, like how's the total heat-pie divided up.John O'DonnellSo when I said 26% of world — that's industrial heat, right. So that's not buildings, that's not other heating sources.David RobertsRight. Heat is a bigger category than that.John O'DonnellI mean, if you take actually heat for buildings and heat for industry, together they're like 60% of all the natural gas used in Europe. But within industrial heat, people sort it out by a couple of different things. One of them is the temperature. There's a lot of heat in cooking processes. That's around 150°C in the form of steam all the way up to the highest temperature heat in making cement, that's around 1800°C. About 95% of total heat is used in processes that need it below 1500°C, about maybe half to two thirds of industrial heat is below about 400°C.There's a fairly steep curve. About half of all industrial heat, something like that, is delivered as steam.David RobertsRight. Steam is the lower end of the temperature spectrum. I recall looking at these charts of sort of what industries use, what levels of heat. Up at the super high heat, you have pretty singular industries, like steel's up there and concrete's up there. But down in the lower heat registers, where you're using just steam, there's a bunch of little industries clustered up there. Most of the industries are using that.John O'DonnellThat's right. All of these have been things that people say are hard to decarbonize because across many of these industries, they're making commodities, whether it's steel or tomato paste that are relatively low margin and for which the cost of heat is a very significant portion of the total cost of production. So this is a sector where all these processes use heat in somewhat different ways. The cost of that energy is really critical to the competitiveness of that industry and what commodities cost consumers. And there have not been great solutions until recently that could provide decarbonized heat at the same or lower cost.David RobertsSo the situation is there's a huge chunk of our energy that goes toward heat, a huge chunk of that goes toward industrial heat. And there's been comparatively little work on finding zero carbon versions of that heat. That's the problem we discussed the last time we talked, probably three or four, five years ago. Everything pre-pandemic is a haze. But I think it was around five years ago I covered this big comprehensive report on industrial heat options, like, what can we do about industrial heat? And it went through the options, and basically the conclusion was that continuing to do it with fossil fuels and just capturing the emissions post combustion was the cheapest option for a lot of these heat uses.And I dutifully reported that. But I didn't like it. I didn't like the idea that that's the best we can do is create these Rube Goldberg machines where we're digging up carbon, burning it, capturing the carbon, burying the carbon again, et cetera. I was like, surely that's not the best we could do. But things have changed a lot, since then. So maybe just run through what are the low carbon heat alternatives and which ones have emerged recently, and what has changed that has helped them emerge?John O'DonnellYeah. Thank you. You said for a long time there hasn't been much work on this. I would say partly there hasn't been so much success on it. I've been working on for 15 years.David RobertsNo offense, John.John O'DonnellAnd in two previous solar companies we wound — who are a lot of the team here at Rondo worked with me there — we wound up delivering more than half of all the solar industrial heat that's running worldwide right now. But to say that's a drop in the bucket is oversizing a drop you asked exactly the right question. What are the options? Because the world has really changed.There has always been the option of burning biomass, which is more or less sustainable, but very high cost, high air pollution, and very, very limited availability. Other kinds of biofuels, like renewable natural gas, if we take it to a giant scale, it might power as much as 1% of our industrial heat. And it's easy to laugh about, but it's true. The thing that has profoundly changed is what the wind and solar PV industries have accomplished over the last 15 years. The 95% reduction in cost means that intermittent electricity is becoming — has become — the cheapest form of energy that humans have ever known.And it's now cheaper than burning stuff as a source of heat, but it's intermittent. So how do we take that intermittent electricity and use it to deliver the continuous heat? I mean, you turn on a smelter or a factory or even a tomato paste plant, you run it for months or a year on end, it has to have continuous heat or it will be damaged.David RobertsIt's worth just pausing to emphasize this. The vast majority of industrial processes are continuous. They cannot run intermittently. They cannot stop and start with the sun and the wind. It just would be wildly uneconomic.John O'DonnellThat's a beautiful and concise way of saying it. Like there are processes where if they get a half second interruption in their energy supply, it takes a week to restart the process. Reliability is a very big deal. So what are the tools we have for that? Intermittent electricity, which is becoming plentiful. And in places right now, you can have essentially unlimited amounts briefly every day at prices far below fuel prices. We have hydrogen, electrolytic hydrogen, make hydrogen, compress it, store it, and then combust it. That works. Although electrolyzers are today expensive, they're coming down in cost.But the laws of physics bite you in that you get about one unit of heat for every two units of electricity because of the chemical steps involved.David RobertsRight. All the conversions.John O'DonnellYes.David RobertsBut can you just dump hydrogen into existing boilers and kilns? Like, is existing equipment hydrogen ready, as they say?John O'DonnellNot exactly. It's hydrogen ready for a few percentage of hydrogen. But when you look at a boiler, 95% of its lifetime cost is the fuel, not the boiler. So upgrading boilers to run that other fuel, that's something that you would do if the economics of that fuel were sensible.David RobertsGot it.John O'DonnellRight? Now at taxpayer expense. We're creating a period where hydrogen, electrolytic hydrogen is going to get down to the same cost as fossil fuel in the US with tax credits. But again, intermittent electricity by itself today is cheaper than fossil fuel. Doesn't need tax credits to get it to that point. And now there is this emerging class of electric thermal energy storage systems that don't do chemistry. They just convert electricity to heat directly and then store the heat. Because heat storage, another thing you could do I skipped over is you could, of course, store electricity in a battery.Right.Which would be the most expensive thing.But if you have a coffee thermos on your desk, it's storing energy as it happens. The energy stored in your coffee thermos is more energy than the energy stored in your laptop battery, and it's a bit cheaper than your laptop battery. Storing heat is cheap right now in the thermos. What do you have? You have hot water, which stores a lot of energy per degree, and an insulation thing around it, depending on how good the insulation is, that'll tell you how long that thing will store energy. All those things have been around for a long time, and suddenly, okay, how are we going to heat these things electrically?How are we going to use simple technology? Because most people who are working on electric thermal storage are doing simple things. There are some exotic things using conductive materials, liquid metal things, but there are simple things that people are doing also.David RobertsYou're hitting directly on something. That is why I love this area so much, why it sort of kind of caught my imagination so much. Like, you really have a situation here where electricity was just more expensive than fossil fuels for these purposes up until like five minutes ago.John O'DonnellExactly.David RobertsIn terms of looking for opportunities for just storing. Now that electricity is cheap, we're looking for ways to store it and use it as heat in a lot of ways for the first time. And what that means is there's like, very simple low hanging fruit all over the place. The way I think about it is, like, my generation maybe like younger people than me, when we think of technology or advanced technology, we generally think digital, and that generally means opaque. Like, we don't know what's going on in there. Even cars these days. Like, so little of it is mechanical anymore and so much of it is digital and computerized.It just seems opaque to us. And these technologies of storing electricity as heat are so delightfully simple. Like, you're literally just heating up a rock and that's, like, you might say that heating up a rock is literally the oldest energy transfer mechanism that humans have available to them. It's probably the very first way we moved energy ever, literally. So it's just fun to me in that it's almost like a childlike sense of discovery to it. Anyway, that's just my that's completely off topic, but ...John O'DonnellOne of the electric thermal energy storage technologies actually uses rock. And on the outside of the pilot it says, welcome to the new Stone Age. And there's a mastodon as the mascot. So, yes, it's a well understood thing.David RobertsSo just to sort of summarize where we've been so far, you need all this heat. Up until very recently, it was overwhelmingly cheaper to do it by combusting fossil fuels. A lot of the alternatives to fossil fuels are more expensive than fossil fuels. But now recently, along comes renewable wind and solar electricity, which are cheaper than anything. So now the challenge is, well, how do you get the heat from the wind and solar electricity? As you say, the applications are running around the clock. Wind and solar come and go. So in between the wind and solar and the applications, you need something that's going to store that wind and solar that can release it in a steady flow.John O'DonnellExactly.David RobertsSo that's the new thermal storage technologies that are emerging now are sitting right in that space, including Rondo. So if you're talking about something sitting in that space, what do you need out of it? What are the sort of metrics by which you judge the performance of that thing that's sitting in between the renewables and the application?John O'DonnellGreat question. So obviously you need safety, efficiency, cost, temperature at which the heat can be delivered.Right.Some other things as well. One of them is the faster that you can charge the system and deliver energy continuously. If you can charge it, if it takes you typical batteries, they charge and discharge at the same rate. But here we'd like to charge perhaps during the solar day in six or 8 hours and deliver for 24 hours continuous. If you could charge in about 4 hours, we find that's even more valuable. The periods of curtailment and the periods of zero and negative electricity prices in electricity grids are short.So the ideal thermal storage can charge very rapidly. You can control its charging like other batteries, it could participate in providing grid services and it can run continuously, shut it down once a year for inspection and when the factory that it's connected to is shut down and just sit there and require low O and M, operating and maintenance, costs.David RobertsYeah, and I presume low losses too.John O'DonnellYeah, that's right.David RobertsBut I want to pause and just emphasize the first point you made just so people get it. We have these wind and solar all come online at the same time because they're all using the same wind and sun. So what you have are these periods of oversupply. I think people are familiar with this. You get oversupply more than the grid can use and today that just goes to waste. It's curtailed. That energy is not used. And so what you're doing is proposing to come along and use it. But if that's your economic sweet spot, those couple of hours of curtailed energy, you need your battery to charge as much as possible during those couple of hours.In other words, charge really quickly because the amount of energy available in those curtailed hours, especially in coming years, is going to be potentially huge. Right. So you need to stuff a lot of energy in your heat battery really quickly.John O'DonnellThat's right. Now the early deployments of heat batteries will use what is curtailed today. One of the things that we see that's uniquely pretty cool about this class of electric thermal storage is the total amount of energy that industrial heat needs is really large for scale. I think we had a 52 gigawatt system peak in California not long ago. We've got about 20 gigawatts of PV in the state. Just repowering the boilers and furnaces that we have right now in California needs 100 gigawatts of new generation to replace those fuel BTUs, about 40 of those gigawatts can actually be built without any connection to an electricity grid.One of the things that's great about ETES powering industry is we're headed for a world where industrial electrification is not creating more problems for the grid, but we'll get there. But this matter of fast charging rate means that new generation projects that are serving the grid, the best ones, the cheapest ones, will be built selling part of their power to thermal storage. Like during the peak and curtailed hours and then delivering those broader shoulder renewable power to the electricity grid. And we're seeing again and again that that's a formula for low energy prices for the industrial and for lower prices to the grid.There's an interesting synergy.David RobertsYeah, we're going to get into that synergy in just a second, but I want to focus on how we're evaluating the heat battery. So we want it to absorb a bunch of energy quickly.John O'DonnellFast, charge. Yeah.David RobertsAnd then we want it to hold that energy with very little losses. And this is the other fact about thermal storage that blew my mind that I do not think is widely appreciated, which is the incredibly low losses here. People are accustomed to, I think if you want to store energy in hydrogen, you're losing about 50% of your energy through all the convergence. Like a 50% efficiency ish yes, batteries, lithium-ion, depending, you're getting up to don't know what the standard average is, but just heating up a rock, you get 90% to 95% of that heat back out of that rock.That is wild to me.John O'DonnellThat's right. Yeah. The least efficient of the thermal energy storage systems are around 90%. We happen to be 98%.David RobertsThat's just crazy. So the heat just sits there in the rock and doesn't go anywhere?John O'DonnellWell, fill up your thermos with hot coffee, take the thermos and wrap it in a couple of blankets, open it up, three days later the coffee is still hot. It's not like a chemical system where there's self discharge or something. The only place energy can go is either lost to the environment through insulation or delivered to the target. So it's a lot easier than it sounds. A lot of people think, "Oh, this efficiency couldn't be possibly the case." It really is almost embarrassingly simple.David RobertsAnd now my question though is when we say 95-98%, what are the time horizons of that? Like if I fully charge your thermal battery and we're going to get into the guts of your thermal battery here in a second, but if I fully charge a Rondo battery and then just don't do anything to it, how long would it take for all that heat to be lost? Like what is the time horizons we're discussing here?John O'DonnellAgain, the use case that we're considering that we're targeting, is it's discharging continuously?David RobertsRight. It doesn't need to hold it that long. Theoretically, I'm wondering.John O'DonnellTheoretically that's right, because the one place where you are holding energy, we've got a food factory that runs shift work. They operate one shift five days a week. So yeah, you're storing some energy and you got more energy on Monday than you did on Friday afternoon. The short answer is we lose about 2%, 2.5% per day. So if you were holding energy multiple days, there would be self discharge. But that's because we were designing for a particular use case. Again, you could decide the rate at which your thermos loses heat by if you wrap it in a blanket ... you could make it store energy for months on end.Then the question is, is that valuable? If you really want to store energy for months on end? If you want to move energy from July to January, chemical storage is a great thing because it doesn't have self discharge.David RobertsRight.John O'DonnellIf you are in a place where you can have a salt cavern and you can make hydrogen in July and pull out in January, okay, that's great.David RobertsRight? Because the hydrogen you pull out in January contains the exact same amount of energy ...John O'DonnellExactly.David Roberts... as you put in the hydrogen.John O'DonnellAs long as it didn't leak out. But yes.David RobertsSo in the hours today's, maybe multiple days, rarely a week time horizon that you're working in, you're getting 98% efficiency. 98% of the energy that goes in comes back out to the application.John O'DonnellYes. In that use case. That's right.David RobertsI think now that we're focused in here on the heat battery, let's just discuss what the Rondo heat battery is, and maybe while you're telling us, tell us what some of the other options in this space are. I know people are heating up. You're heating up bricks. Some people are heating up giant chunks of graphite. I think sand is on the table. I don't even know what all the options are. But what are people trying in that space?John O'DonnellThe one technology that's been at scale for quite a while, that's been used by the solar industry since the 1980s is using nitrate salts, which melt at around 250 degrees. Salts? That's right. They're stable up to about 600°C. And so you can have a big tank of cold salt, which is something like 600 degrees Fahrenheit. It looks like a transparent liquid, but stay away from it. And a tank of hot salt, and you heat by pumping from one to the other and pull the heat out going the other way. I built my first molten salt test facility back in 2008 at a national lab.David RobertsI remember there was a hype cycle around molten salts that has kind of faded. Why has it faded? Like, why are rocks preferable?John O'DonnellThe more you know about it, the less you like it. It's one thing to use it in a solar power station where there's nothing in there for a mile away except for the turbine. It's quite another thing for an energy storage facility to be put inside a factory where people are working. When I mentioned safety first, you don't want a system that can catch fire or spill a superheated liquid that would burn everybody or release toxic gases. I'm not aware of any molten salt projects that haven't sent at least one person to the hospital. So there's the molten salt systems.And again, they work. They're proven but they have proven challenges.David RobertsThey just require a lot of engineering to contain.John O'DonnellWell, and that's another matter that you've talked about previously, which technologies get cheap, right? Molten salt systems are a lot like they have the nuclear reactor characteristic that everyone is bespoke, those tanks at that site with that engineering and there has not been much learning capable to drive cost out. The modular approach, the factory manufactured approach, eludes that technology. Now there are a lot of people exploring how do we do modular factory manage. And one of the things that you first do if you want to store heat is, okay, what's it cheap to store heat in?As you mentioned stone, crushed rock, various kinds of rocks in a box or sand in a cylinder where you build an industrial strength hairdryer. You blow superheated air through the rock or the sand bed. And then when you want heat, you push cool air the other way through the sand or the rock bed. That works. There are people taking it to scale. It has temperature and cost challenges. What you find in every one of these cases, the rock is cheap, but the box costs a lot.David RobertsAnd the fans, I assume like the fans and that kind of engineering adds to the ...John O'DonnellThat's right. And remember now that your fan has to blow at your peak charging rate. And there's an example of a technology that leads you to it's more expensive to charge fast. But the big problem with those unstructured materials is when they heat up, they expand and you have to have a container strong enough and then when they cool, they shrink and settle and then the next day they expand again and they slowly turn into dust over at a rate. So the material looks really cheap, but the system turns out to be not so cheap.Right then you mentioned there are a lot of interesting science experiments with new materials that have never been used this way before. When we started Rondo, we did a really careful look at everything that's out there. There are people using liquid silicon. It melts at 14° Celsius stores a lot of heat. Just like ice melting in a glass absorbs a lot of heat melting and releasing silicon. Freezing silicon is a really good thing for high temperature heat. But what do you make the glass that's holding that silicon-ice? How do you keep it like there are a lot of challenges that companies have been working on for years and it's probably going to take another decade before that technology is at the point that an ordinary project finance guy will say, yes, that's as low risk as PV. I'll invest in that at the same finance rate. And that time to bank ability is one of the biggest issues. If you want a technology to go big fast, everybody's got to agree it's boring and low risk and that's a challenge with new materials. Graphite is another material that's interesting. It has higher heat capacity than rock or brick, especially when it gets hot, but it catches fire at 560°C. So you want to store energy at 1500° or 2000°.You've got to keep it in some atmosphere so that it can't catch fire for 30 years and it's conductive electrically, which could be great. But anyway, there are interesting engineering challenges and there are at least four companies working on that. One of them is also looking at using that graphite not for electricity to heat, but electricity to heat to electricity. Using PV cells to capture the light from the graphite.David RobertsIs that Indora?John O'DonnellAntora.David RobertsAntora. Yeah, I talked to them, too. And in terms of like science-fiction geeky fun, that one is just a great one. They heat the graphite up, it gets so hot that the energy comes back out as light.John O'DonnellLight.David RobertsSo they have it covered in shutters that they can open incrementally. And the light can either shine on tubes full of fluid if you want heat, or these special PV modules that they built especially for it. If you want electricity, like the whole conceptually, that's very satisfying.John O'DonnellIt's super cool. My first job was infusion power, where you have a reactor that wants 100 million degree plasma right next to a superconducting magnet that has to be five degrees. The Antora PV challenge when they solve that that technology is cool for electricity to electricity because it could turn out to be long duration, no moving parts storage. It's hard for us to see that. That's an example of we're going to do something deeply innovative. How long will it take to prove that it's bankable and what we're doing is much more boring? The back to electricity is their superpower is back to electricity.David RobertsYeah, I want to discuss that. Like the ability to go back to electricity and what, you'll come to that. We'll get to that. But you guys have settled on rather than any of these materials science fun time experiments. Bricks.John O'DonnellYeah. Okay. Somebody told me this the other day. How many gigawatts of batteries are there in the world right now, do you know?David RobertsI don't.John O'DonnellSomebody told me there are about three gigawatts of batteries in the world right now.David RobertsLithium-ion batteries, you mean?John O'DonnellYeah. So how much heat storage is running in the world right now? As we speak, there's about 30 gigawatts of heat storage running right now. In 1828 was the first patent for a thing called a cowper stove, which is a tower with a thousand tons of brick in it that has air passages that on a 1 hour cycle. The still combusting exhaust of the blast furnace is blown down through that tower and heats all the brick to about 1500°C. And then for about 20 minutes, fresh air is drawn up through the tower and it's providing the inlet air to the furnace and it's delivering 115 megawatts heat for about 20 minutes.David RobertsCrazy.John O'DonnellAnd then it's heated again. These. Things are heated and cooled 24 times a day. They last 30 years. There's a million tons of that brick in service right now at the blast furnaces around the world.David RobertsAnd these are just ordinary brick-bricks that people are familiar with. Like, what are bricks made of?John O'DonnellWhat, are they the term they use? Yeah, there are a bunch of different materials, but two of the most abundant elements in Earth's crust are silicon and aluminum. Silica, silicon dioxide, alumina, aluminum oxide are two of the most important minerals. Different bricks are made of different mixtures of silica and alumina. And there are other kinds of bricks as well that are even higher temperature, but they call it aluminosilicate brick. It's higher temperature brick than in your fireplace. Looks a lot like it. And it's what is in every if you have a ceramics kiln, that's what's in your ceramics kiln liner.It's in a cement kiln, and it's again, used in all kinds of areas. People have been making brick like this for thousands of years. Brick is made from dirt. I mean, certain kinds of dirt. You mix it up, you put a little binder, you throw it in a kiln, and you've got your brick.David RobertsSo if I'm looking inside a Rondo box, am I literally just looking at a stack of bricks?John O'DonnellPretty much. The one thing that's different ... our breakthrough. So the brick, as you know about brick, it's brittle. If you drop a brick, it'll break.David RobertsRight.John O'DonnellYou also know that brick is not a good heat conductor. That's why we make fireplaces out of it. So if we want to heat it fast, we have to heat it uniformly. If you stuck a brick and you had, like, one side in a bucket of water and the other side in a fire, the brick might fracture. But if you put the brick in the middle of the fire, it'll heat up rapidly to the temperature of the fire. It's one of those ideas that once you see it, it's obvious. But it only took 80 design revisions.If you look inside a Rondo unit, what you'll see is a brick stack that's full of these open chambers. It's a checkerboard of open boxes surrounded by brick, and brick surrounded by these open boxes. And electrical heaters are embedded directly in the stack, and they provide radiant heat within those open boxes. And because thermal radiation of every object in the universe goes as the fourth power of its temperature in degrees Kelvin, as I know you remember.David RobertsOf course.John O'DonnellThings that can see each other get to become the same temperature by exchanging heat. So the result of this was we found a way to directly, rapidly heat the brick.David RobertsAnd this is an alternative to blowing hot air over the bricks.John O'DonnellThat's right.David RobertsWhich, a. would require more engineering and more money, but b. also might not heat them uniformly, like might heat one side before the other side or something like that.John O'DonnellHot air. You can heat them uniformly, like the blast furnaces do that. But in that case, you have the same electrical heater that's in something like a hairdryer. And inside a hairdryer, the heaters are mostly radiating to the metal plates, which in turn are heating the air, which in turn would in this case, heat the brick. There'd be a couple of hundred degrees difference between the final temperature of the brick and the temperature of the wire. In our case, that's about five degrees.David RobertsSo instead of using the wire to heat the air, to heat the brick, you're just sticking the wire in the brick, and the wire is heating the brick directly.John O'DonnellThat's right. So we just last week, we announced the world's highest temperature thermal energy storage system running. That's not because we use different heating materials than others. It's because of that physics insight that led to that structure. That's right.David RobertsGot it. Okay, just quickly, what are some of the engineering challenges here? Do the bricks expand and contract when they are heated, or do they degrade over time? What sort of things are you dealing with here with bricks that you had to overcome?John O'DonnellYeah, there were lots of things because what we're talking about is kind of at some level obvious, and people have done really good work on this previously. But the challenge is you have to think about, yes, the bricks expand and contract, so build your structure. But the nice thing is they're freestanding. They don't need a container to hold them in. So if you build your structure properly, it can freely expand and contract.David RobertsSo there are like spaces between the bricks in which they can ...Where they're touching when they're hot and spaces open up when it's cold. Exactly. Other big challenges consider if you have a storage system and one area has some airflow blockage so that during discharge, it's not getting as cool as another area the next day when you put heat in, it's going to wind up hotter than another area. And the day after that, even hotter thermal runaway that would cause failure because one part was too hot. If you have that possibility, you have to run the whole thing cooler. So it turns out one of the hard problems, one of the hard engineering problems is making sure that the temperature inside the material is uniform.John O'DonnellAnd it's uniform not just when the unit is new, but when it's 30 years old.David RobertsYour promise here is that this Rondo battery has the same capacity and the same performance characteristics in 30 years that it does today. Is that the idea?John O'DonnellThat's exactly right, yeah.David RobertsAnd no other battery? There's no other battery that can say that.John O'DonnellI think that's true. But here, there's a million tons of this material running in the world, and those guys have much higher mechanical force on it. They build 30 meters tall things. We build eight meter tall things. They heat and cool it 24 times a day. We heat and cool it once a day. Lasts 30 years for them. Pretty clear it's going to last longer than that for us. Yeah.David RobertsAnd let me ask about getting the heat out to where it needs to go, because as I have been reading about, I did a thing on a company a while back that was using concentrating solar to superheat a fluid. And they could get to these levels of heat that are germane to concrete and whatever the higher end, the higher temperature applications, but only at a particular spot. Right. It's got to be right where the sun is and where everything's coming together in that one spot. And then, of course, you face the challenge of how do I get that heat to where it needs to be without losing a bunch of the heat?And this is sort of, obviously the other half of the thermal energy challenge. And there's sort of two challenges. One is making it into steam right. For all these lower temperature applications, and then, I don't know, making it into what, for the steel or the super high energy. I don't even know how you transfer that high version of heat. So what are you using on the back end?John O'DonnellYeah. So every combined cycle power station in the world has a jet engine that's generating electric power. Its exhaust is around 605 C. That exhaust is passed through a boiler, a heat recovery steam generator that drives a steam turbine that makes extra electric power. So the world knows how to build those boilers that run on about 600 C air.David RobertsGot it.John O'DonnellThe Rondo storage is much hotter temperature than that we mix down. And for the systems that are delivering steam, we work with leaders who build conventional boilers and we've engineered the heat battery to include that boiler. So the basic heat battery models are exact drop in replacements for particular models of industrial boilers. They're just about the same size. Stick us next to your existing one, hook us up to the pipe.David RobertsYou're replacing a fossil fuel run boiler with a heat battery and a boiler in the same space.John O'DonnellYeah. We think of the heat battery as from the substation to the steam flange in that case. So it is a like for like drop in replacement. The less work the customer has to do, the better off we are.David RobertsYeah, I was going to ask it. We might as well discuss this now, because this is obviously one of the this is something you run into with battery chemistries all the time. Right. Which is just like there's so much existing infrastructure that even if you have something clever and fancy and new that's super cheap, if it requires all the facilities to update themselves, you're just starting way, way behind the eight ball.John O'DonnellThat's right.David RobertsSo to what extent is the sort of Rondo heat battery plug and play like in a low temperature steam application and like a steel plant, can you wander into any of these and just switch out with no pause.John O'DonnellAll of the energy. So the top four categories in the United States, the Doe just gave a talk recently and the top four categories in descending order of industrial heat use are chemicals, food and beverage, paper products (That includes everything from toilet paper to cardboard,) then cement, and then steel. So for chemicals, about a third to 50% of all the heat is steam. For food and bev and paper products, it's all steam. And for cement and steel, none of it is steam. So we are simultaneously, we're delivering drop in boilers today and simultaneously with our investors and partners building and developing the calciners, the ethylene crackers, the kilns, to drive particular industrial processes.Because you made this point about the solar tower. Yeah, you have a spot that's 100 meters up in the air where you can have your heat. But what we want, the heat is in some process unit. And look, we have 200 years of designing industrial process units that are powered by fuel. Which of those can we retrofit? Where will we need to design new things? We were given a grant by the Danish government. We have a project underway to design and pilot a true-zero cement process, intermittent electricity to zero-emission cement. Most of the work in that project is the design of a calciner that instead of internal combustion, runs on superheated air or superheated CO2.So it doesn't all happen all at once, but it does all happen, but some of it will. The high temperature things will take more work to integrate because industrial plants today were designed with magnificent engineering and heat balance and efficiency burning fuel. And so, as it happens, everything that runs on steam, easy drop in all the high temperature processes. We have work underway now and hope to have results over the next couple of years that use the same thermal storage platform.David RobertsBut this first commercial battery that you've deployed now, which by the way was just last week, I think, what application is that or what temperature level is that?John O'DonnellYeah, that's targeting steam, steam, steam, steam and steam. The particular installation is at a fuel producer and it's at a biofuel producer. Whether you're making renewable diesel from soybeans or animal fat or ethanol from corn, about half the total carbon intensity of that fuel is fossil fuel that was burned to produce that biofuel. And we can set that to zero. So we can produce biofuels that are about half the carbon intensity of what they are today. Interesting, our customer is really a visionary that's going to zero because the other thing that's been talked about a lot with biofuels is combining carbon capture of the biogenic CO2 in those facilities.As it happens, using Rondo for the heat eliminates about half the total carbon intensity using carbon capture, eliminates about the other half and together you get about essentially a zero-CI, zero-carbon-intensity fuel. That little unit we just started up is the pilot for deployment of a series of larger ones to do exactly that, to produce zero carbon biofuel.David RobertsVery interesting. So let's pull the lens back a little bit, maybe talk about business model. Is the idea long term that if I'm say I'm a manufacturing facility and I'm making I don't know what baby food, is the idea that I buy a Rondo unit and install it in my factory? Or is the idea that Rondo comes in, sets things up and sells me heat as a service? In other words, am I buying the equipment or am I buying the heat? Or some of both.John O'DonnellYeah. Over time, there are as many answers to that question as there are to how conventional gas turbines and steam turbines are sold. Right. Sometimes people own their own cogeneration plant. Sometimes they contract with someone else to provide them electricity or heat as a service. The renewable heat as a service business will develop the same way. In the United States today, there's a huge community of developers who know how to shave a few pennies off solar and wind electrons, but have never really looked at these industrial facilities. In Europe, actually, there are already renewable developers who are out there originating renewable industrial heat projects.So, first of all, Rondo is offering, on four continents, commissioned, guaranteed installed heat batteries. That's the foundation. We are also originating and financing heat as a service, principally in North America.Interesting.Because, again, whether you make baby food, as you said, or steel, you don't drill gas wells to get the fuel to run your process. You buy energy as a service, your capital dollars, most folks want to spend it on their own processes. And this class, this thermal energy storage class, is arguably creating one of the great business opportunities of our time for the development community, because we all know wind and solar deployment is slowing down, not because of reduced demand, but because of congestion.And I think the interconnection queue time in England is now 13 years.David RobertsYes, there's like a terawatt now, I think, waiting in the queues.John O'DonnellRight. Rondo heat batteries. Our basic unit, the RHB 300, needs 70 megawatts of generation. Typical installations may have two to ten at a single site. These are utility scale energy demand and they can be built with no grid connection.David RobertsRight. So the idea is you go build a solar farm or a wind farm that is just attached to these batteries.John O'DonnellThat's right.David RobertsAnd then you're selling the heat from the batteries. So at no point do you need the electricity grid. You're not waiting for the interconnection or anything else, that these are a coupled unit. Wind and solar being so cheap, the implications are endless and often counterintuitive. Like when I hear I could either buy heat from a conventional boiler or I could buy heat from someone who had to go out and build an entire utility scale renewable energy installation and a couple of heat batteries. Intuitively, that just sounds more expensive. But are wind and solar so cheap now that that's competitive?John O'DonnellYes, absolutely. And it depends, right, because one of the things that's exactly the right matter that you just raised someone is making an investment that's going to provide 40 years of energy to your facility. They're going to sell it to you on a contract, they're going to care about your credit worthiness and your willingness to sign that contract. That's one of the things that's unique here. It's different than selling electricity to a utility. On the other hand, from your standpoint, someone is saying you can get off the fossil fuel price roller coaster. Not surprisingly, there are a lot of people in Europe who ... and we've seen that in US.Prices have been fourteen, they've been two, they're ten. And they are also in places that have carbon prices. You can have a permanent. This lack of volatility and exposure to regulatory matters also is a strategic advantage. A friend of mine said, why were all the factories in England built on the coast? Because where it was cheap to bring the coal, low cost, reliable energy supplies are the foundation for industrial investment.David RobertsSo you're free from fluctuations in fossil fuel prices and you're free from any worry about escalating carbon prices or other carbon related regulations. Basically, like two huge worries because as you say, for a lot of these facilities, the cost of energy is the bulk of the costs. And to have the bulk of your costs fluctuating 500x back and forth over the course of a couple of years is just an insane way to try to run an industrial facility.John O'DonnellThat's right. This matter of what kind of risks do we take? People say, oh, it's risky to work with this new technology, but look at the risks that we just were used to taking. And we're entering this new world where we're not talking about a green premium, we're talking about the same or lower energy cost with these reduced risks. And then, of course, depending on what the commodity is, low carbon aluminum trades at a price premium on the London Metals Exchange. Low carbon fuels trade at much higher prices in California and Germany. And for consumer facing brands, there are buyers, coops of producers who are seeking low cost effective renewable heat sources so they can offer to the market low carbon commodities.David RobertsYeah, I mean, it seems like there ought to be a bunch of market actors that are just ready to embrace this. Like, for one thing, as you say, just on a quantity basis. If you take all that energy that we're using for heat and transfer that to electricity, you need a lot of new electricity and a lot of new clean electricity. So it seems to me like renewable energy developers ought to be over the moon about this, like beating down your door. Are they lining up to be proponents for renewable heat in the industry generally or have they not caught on yet?John O'DonnellIn some places the answer is yes. As I mentioned, Europe is very aggressively moving in this direction and a number of folks over the last few years have said "this Rondo thing sounds too good to be true. Come back to me when you're operating something commercial." We're now operating something commercial. So the short answer to your question is yes, because again, these projects offer this mix of speed and certainty that we're not tied up in a grid queue. Scale, utility scale, there's a lot of commercial industrial C&I Solar, where people are building 2 MW here, 2 MW there.It takes the same amount of brain power and lawyer time to do the two megawatt project versus the 400 megawatt project that the same facility would use for heat, and returns now that we're in an era where that's the coolest thing is that the numbers work for the heat user, they work for the financier, they work for the builders of the solar fields and they work for us. And that's a new world and economic tailwinds driving it. It will keep going faster and faster. The size you mentioned, I think at the end of 2021, there was about 1000 gigawatts of wind and 1000 gigawatts of solar each in the world.The IEA did an assessment of industrial heat and their number is it's about 9000 gigawatts of new generation that's going to be required to replace the oil, coal and natural gas now being burned.David RobertsGood grief.John O'DonnellThat's worldwide, right? And so it's only, what is it, 20% of that in the US. Yeah, that's right. It's only a few thousand gigawatts in the US.David RobertsAn enormous opportunity to build more renewable energy.John O'DonnellYeah.David RobertsA similar question is, and I have always had this question about electric vehicles too, which is electric utilities are sort of notoriously stressed, worried about this death spiral, they're worried about grid defection. And you represent potentially just a wild new load, a new responsibility for them. Something that natural gas utilities were doing, were handling, is now all going to transfer and be their responsibility, which is just a way for them to grow and invest and just a wild new opportunity for them. Why aren't they at the front of the line beating down the door, trying to make this happen faster?John O'DonnellThat's a great question, and they are. One of our investors is Energy Impact Partners, whose backers are the North American electric power industry. And for sure the lowest cost way that we're going to decarbonize all of civilization is electrification. And for sure the electric industry is at the heart of that. One of the things that's really profound about what we're doing for them is that electrification, you install an electric furnace. That furnace is now running on wind power 30% of the hours of the year. And the other 70%, it's a new load on gas fired or coal fired power stations until the grid has fully decarbonized.David RobertsRight.John O'DonnellThese thermal storage systems, these things can be dispatched by the utility the same way they dispatch generation. The deal is not that I want a megawatt continuously, the deal is I want 24 megawatt hours today. You deliver them when it's convenient. These things become an asset in the electricity grid and a solution to these problems of variability and over generation and balancing.David RobertsRight. In the same way that sort of any controllable load helps grid stability. These are controllable.John O'DonnellYeah, but people talk about controllable load, demand response, for example, is a load that you expect to run all the time, but you can turn it off during emergencies. That's not this, this is something that no, no, you're going to dispatch it so that it never takes a single megawatt hour of spinning reserve or gas fired power generation. You're going to dispatch it so that it never raises the peak demand on your transmission or distribution system. You can manage it with telemetry from the grid operator. It's different than anything that's come before. It's like lithium-ion batteries in that sense, but at a tiny fraction of the cost.And we're not trying to solve from moving electric power from noon to 07:00 p.m.David RobertsRight.John O'DonnellWe are taking that electric power and replacing gas combustion principally in North America, and oil and coal combustion. We're opening an entirely new segment to renewable deployment. So, yeah, the electric utilities are getting engaged now. They face all kinds of issues with the regulatory frame that we have for electricity. Of course, they're already facing those matters as renewables deploy. And there are some new challenges, but there are people actively working that issue and we're thrilled to be working with them.David RobertsSo if I'm, I've got this manufacturing facility, I've got a big Rondo battery and I'm trying to decide between two options. One is I could build my own off-grid behind the meter generation, solar and wind. I could put my own solar and wind up, or I could just get on the grid and time my charging so that I'm chasing the clean energy on the grid so that I'm only charging when there's clean energy on the grid. Do we have any sense of which of those will be more economic or why you'd want to go one way rather than the other?I'm just wondering how many of these sort of self contained, off-grid, purpose built renewable energy installations there are going to be, it seems to me intuitively like that ought to be more expensive and what you ought to prefer is just for the grid itself to clean up so you have more, so it's easier. But what are the choices there?John O'DonnellThese questions are right at the heart of the matter. You're dead on. And I'll give you the long answer. The short answer is it depends. And it depends primarily on where you are. Pre-war economics, one project in Europe, large operation, that wanted to replace a 250 megawatt gas boiler. They could install a 250 megawatt electric boiler and eliminate their scope one. Their actual scope one, plus scope two would go up because they're in an area that's about 40% wind. And now, if 60% of the energy is coming from a coal plant, you were worse off.But from an economic standpoint, they were paying $35 a megawatt hour for gas fired heat. The electricity price annually would have been about €68 sorry. Per megawatt hour. But upon a study, given the presence of offshore wind in that area, their expected energy price on a long term buying in the cheapest 4 hours a day was under €10 a megawatt hour. So that's an example where the grid connected thing is exactly right, and it will only take four years to get the grid upgrade done, of which about three months is construction. So in a lot of places, the grid connection for grid projects is a matter.Oklahoma last year had 2000 hours of negative wholesale prices. If you put a project in Kansas or Oklahoma, you have energy prices that are slightly negative on an annual basis. If you can charge very rapidly, if you are allowed to participate in the wholesale market, there are regulatory obstacles.David RobertsBut in theory, in Oklahoma, during a time of negative wholesale prices, your facility that's running off a Rondo heat battery could be paid to charge itself.John O'DonnellThat's right.David RobertsIs that how that works? Is that what negative prices means?John O'DonnellThat's what negative prices means.David RobertsThat's so mind-blowing.John O'DonnellWell, again, and we have lots more of that coming. I know you've spoken to folks about the IRA. The production tax credit coming to solar is going to broaden the areas of the country where we see intermittent negative prices. Because, of course, if I'm getting $20 megawatt hour for tax credit, I'm perfectly happy to generate when prices are negative $19, right?David RobertsYeah. That's just crazy.John O'DonnellTechnologies like this that can absorb those periods are going to lift the price floor. They're going to benefit all the generators, especially the generators that can't turn off. And we're pretty excited. But again, it's can we connect to the grid? Can we capture those prices?David RobertsBecause if you can, there's enough heat to absorb all the curtailed power in the US, times a gazillion. Theoretically, if you could hook up all heat to electricity, you'd never curtail again, or at least not for decades. Probably.John O'DonnellOf course, subject to where is the heat-load versus where is the curtailment? Some curtailment is regional associated with total generation. You know, some of it is transmission constrained. But to a first approximation of the answer yet, that was correct, yes?David RobertsYeah, that again, seems just a crazy business opportunity for everyone involved.John O'DonnellYeah, we agree.David RobertsBut you do expect to see these off grid, custom built renewable energy installations, purely powering heat batteries in areas, say, where the grid is congested, or the grid is dirty or the interconnection queue is unusually long. You do expect to see those pop up?John O'DonnellWell, as I mentioned earlier, and just for scale, California has on the order of 20 gigawatts today. We need 100 gigawatts of new PV just to replace the BTUs of fuel now being burned for industrial heat. About 40 of those gigawatts, because of where the things are cited, could be built with no grid connection at all. And most of them will need some kind of grid connection. We see again and again that the new renewable project development model is going to be building a project that part of its electricity goes to industrial heat, into a heat battery, and part of it goes to the grid.And that, that's the sweet spot that delivers lower cost electricity to the grid. And we're absorbing what would have been curtailed power from that new purpose built thing to get all the power we need for the factory or the cement kiln or whatever.David RobertsRight. Yeah, if I'm a renewable developer and I catch wind, that there's this whole category of renewable projects that don't require this unholy paperwork nightmare that they all go through. Now again, I just can't imagine that they're not going to be stampeding in this direction. I mean, I hear them complain about this constantly.John O'DonnellWhat are the required conditions? Obviously the financial community we have to get our minds around. Okay, how are we structuring these projects where most of the energy is going to a single factory rather than to the utility? Let me think about the credit worthiness of that. And then for the moment, how long will it take to retire the Rondo technology risk? How do we backstop that? And we're busy building systems and projects that this first one of course, is the first step at commercial scale to build the track record. But again, there's a reason why we chose these century proven materials specifically, so that once you turn one of these things on and operate for six months, there's nothing left to prove.We know it works and we already know everything is durable.David RobertsThe brick heats up, the brick cools down. It's not again, it's so simple.And exact ... but that exact material, there's a million tons of doing that around the world. Doing that right now in much more severe service. But yes, it's simple. That's right.And I would imagine also that this space is going to see a lot more entrance competition. Of course, once it's kind of uncorked and it becomes clear what the opportunity is.John O'DonnellLook, trillion dollar markets don't happen without lots of people trying to enter them and nothing could be better, right? That's what we urgently need.David RobertsRight. One other question about industry, about location matters. You mentioned industry clustering along a coast where the coal is available. As more and more of our industrial activity in general and civilization gets hooked up to cheap renewable energy. Do you see something like over the course of I mean, I guess this will take years and decades, but do you imagine areas of intense renewable capacity like with lots of sun and lots of wind becoming new attractors to industry? Do you see global industry starting to migrate to renewable energy? Is it that much of a chunk of the cost of an industrial facility that it might be worth someday literally moving to it?John O'DonnellThe short answer to your question is yes. Just look at what happened with the shale gas revolution in the US. Vast investments in petrochemical and other manufacturing immediately shifted to where huge employment growth shifted to where that low cost energy was. And there's a question of how fast these transitions happen. Vasila Smill likes to talk about, "oh, it takes a really long time," but there are lots of examples where that is not true. Just, again, when the rules changed and combined cycle gas fired power generation was allowed in the US. We saw giant capital flows and giant rates of transformation.Now, that took awareness. It took enough experience that investors could say, oh yeah, I'll build that giga project because I know it's going to work. It took awareness of the kind that you are building that these opportunities exist, but the long term. Yes, absolutely. That's right.David RobertsThat'll be such an interesting geopolitical like of all the forces in the last 50 years or whatever that have moved industry around the globe, this will be just a completely new version of that. It's going to scramble all the previous alliances.John O'DonnellYeah, but there is one example that's even faster, which is not just the long term, but the right now. A couple of weeks ago, I spoke at the Munich Security Conference in a session with a number of industry CEOs and Ursula von der Leyen, the European Commission president and president. Wevine said, look, there are three wars underway. There's the ground war, there's the energy war. He thought he would bring us to our knees. And there's a clean energy war, mostly with China. And a huge challenge before us today is how do we get off gas? But we need to get off gas without deindustrializing.There have already been giant plant shutdowns and layoffs because of the unavailability of gas right now and the forecast unavailability of gas longer term. Europe's bullets in the energy war are clean electrons, domestically produced, stable, low cost sources of energy. And again, we and all the other electric thermal storage technologies because we save twice as much gas per kilowatt hour as hydrogen. We're an important part of speeding up that transition there and preserving an existing industrial base. I think the same thing is true in the US as well as carbon prices come into the world. As gas prices rise, the competitiveness of US manufacturing on the world stage is going to be affected by how fast can we make this transition to renewables.And it doesn't happen all at once. But there are beyond the climate drivers, beyond the huge business response that we've just seen in the last five years, to the climate drivers, the pledges, and not just pledges, but action that we're seeing across all kinds of industrial producers. We are really at an amazing moment. I kind of wish we had gotten started with what we're doing here at Rondo five years ago. But five years ago what we were doing was stupid, right?I mean, go back ten. What we're doing somebody could have figured out earlier.David RobertsI said it at the outset, I'll say it again, I say it over and over again. Wind and solar being as much cheaper now as they were five to ten years ago is just like it's not an incremental change, it's a phase change. It's a flip to a different system. All we're doing now is just like sort of one at a time here and there in different industries, in different places, kind of opening our eyes to like, oh, this is a completely different landscape, like completely new opportunities. It's a different world now. It's going to take a while just to absorb the implications of super cheap renewables.John O'DonnellYes. And the thing we know for sure is that every year somehow those cost reductions will continue, right? We have some short term supply chain things, but somehow, I mean, I worked in the electronics industry for decades and everybody every year said, oh, Moore's Law is over, it can't keep getting better.David RobertsThey say it every year for wind and solar too, right?John O'DonnellYeah, exactly. And you look back over every five year period, every year's forecast was wrong, it fell faster than that. It's reasonable to assume we're going to continue to be in that, so that this era that we're entering, it keeps getting better and better. Our storage technology and the other storage technologies will cost reduce as they come down. But the storage technology is only 20% of the cost of the total project. The fact that the wind and solar are coming down so steeply, this cost advantage is going to continue to open for the people who have made this transition onto renewables.David RobertsIt's really interesting watching people in industry try to sort of skate to where the puck is going to be, as they say, sort of like start off on something that might not be economic when you first start developing it, but you're going to meet that cost curve, right, in five years, and then your business model will become viable. It's a real tricky timing there. There's a lot of people trying to sort of coordinate that dance just right.John O'DonnellYes, but my point is we're already at that point where we're at break even or better, we're not waiting five years. That's one of the big difference of this class versus there are a lot of things that are just as you said, we're investing now because we're hope it's going to be cheaper in the future.David RobertsWe're already at that point, right, so a final question. I wan

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Episode Notes Episode Summary For this episode of This Month in the Apocalypse, Brooke, Margaret, and Casandra chat about more horrible things and some fixes. They talk about supply chain shortages, corn, ways to keep your house warmer without using a ton of energy or resources, dubious debunked how warming myths that also might burn it down, and a thorough introduction to hurricane preparedness. Host Info Casandra can be found on Twitter @hey_casandra or Instagram @House.Of.Hands. Margaret can be found on twitter @magpiekilljoy or instagram at @margaretkilljoy. Brooke is just great and can be found at Strangers helping up keep our finances intact and on Twitter @ogemakweBrooke Publisher Info This show is published by Strangers in A Tangled Wilderness. We can be found at www.tangledwilderness.org, or on Twitter @TangledWild and Instagram @Tangled_Wilderness. You can support the show on Patreon at www.patreon.com/strangersinatangledwilderness. Next Episode Hopefully will come out Friday, October 4th, and every two weeks there after. Transcript An easier to read version is available on our website TangledWilderness.org. This Month In the Apocalypse: October Brooke Hello and welcome to Live Like The World Is Dying, your podcast for what feels like the end times. I'm Brooke Jackson, one of your hosts today, along with the brilliant Margaret Killjoy and the iridescent Casandra. This is October 2022 installment of your most favorite Live Like The World Is Dying sub-segment, This Month In The Apocalypse. Today, we're going to talk about the latest shortages, the looming crisis in energy, fuel sources and what can be done about the crisis, war, climate disasters and probably some shit about the economy. But first, we'd like to celebrate being a member of the Channel Zero Network of anarchist podcasts by playing a little jingle from one of the other luminous podcasts on our network. Doo doo doo. Jingle Speaker 1 Kiteline is a weekly 30 minute radio program focusing on issues in the prison system, you'll hear news along with stories from prisoners and former prisoners as well as their loved ones. You'll learn what prison is, how it functions and how it impacts all of us. Margaret Behind the prison walls, a message is called a kite, whispered words, a note passed hand to hand, a request submitted the guards for medical care. Illicit or not, sending a kite means trusting that other people will bare it farther along until it reaches its destination. Here on Kiteline, we hope to share these words across the prison walls. Jingle Speaker 1 You can hear us on the Channel Zero Network and find out more at Kiteline radio.no blogs.org. Brooke And we're back. Quick introductions for those of you who might not remember each of us or might be listening for the first time. I'm Brooke an indigenous, baby anarchist woman who loves spreadsheets home remodeling and connecting with the land. And I'm going to toss to Margaret. Margaret I'm Margaret, and I am someone who writes a lot and is on podcasts a lot. And does useful stuff too. But, those are some of the things I do. And I will pass it to Casandra. Casandra I wasn't prepared for an introduction. Margaret Neither was I. Casandra My name is Cassandra. I garden and weave. Check! Margaret Yay. Brooke And do amazing art. Casandra Yeah, I make books. And drink tea. Okay. Margaret That's good tea. Casandra Yeah. Margaret Back to you, Brooke. Casandra Oh, yeah, we're supposed to remember to plug things. Strangers In A Tangled Wilderness is putting out our...Well, it's not really technically our first book is it, Margaret? Brooke Speaking of books, I feel like there's a book that you've been working on lately. I know we're supposed to plug things at the end. But this sounds great to mention it now. Margaret No, but it's our first book is a new collective. Casandra Okay, we're putting out our first book as the new collective. And also, first book in a long time, called "Try Anarchism For Life: The Beauty Of Our Circle" by Cindy Barukh Milstein. And I think I sent it to the printer yesterday. So fingers crossed. Brooke If people want to preorder that, Casandra, where can they do that? Casandra On the Stranger's site. And if you preorder it, you'll get some cute little book plates, which I didn't realize other people didn't know what book plates are. But, they're like the little stamps or stickers, you can put at the beginning of books. And it says "ex libris," which means 'from the library of,' and you can write your name so everyone knows it's your book. Brooke Nice. So check out our website for that awesome book, which is beautifully designed, and actually a really, really good read. I really enjoyed it. All right, in our very first episode of This Month In The Apocalypse, one of the things we talked about was things that were in shortage, and surprise, surprise, we are continuing to have supply chain shortages. The thing that made me recall this and want to bring it up, again, is that I saw an NPR article in the last week about the fact that Adderall is facing a shortage, which is interesting, and did a little more digging on what's going on there. And part of it is that they had labor shortages. So, they fell behind in their production. And then the part that was super interesting to me that I've never thought about, Adderall is a highly controlled substance. It's probably a well known fact, part of the part of the highly controlled portion of it is that manufacturers are regulated in how much of it they can produce. So, if they fall behind their schedule, it's not as easy as just like, "Oh, we're gonna do a double shift and make extra this month," they have to get like, special dispensation to be able to make more. So they can make the amount that they're allowed to, but not more than that without special permission. Margaret So they can't catch up? Brooke They can if like they apply for FDA approval and get, you know, temporary approval or whatever to make extra, assuming they can get the ingredients they need and workers to actually make the extra. But yeah, it's not as easy as just like, "Oh, we need to make extra." There's a whole bunch of extra stuff going on that they have to do to do that. Casandra Yay, bureaucracy. Brooke Yeah, totally. So ration your Adderall? That's probably probably not how that works. There are other medical supplies that are still in shortage too. This, I also found interesting because we haven't seen it in the headlines as much, or at least I haven't, right.? Like, it hasn't been in the news. But, there have been things that have continued to be in short supply of the throughout the whole pandemic. One of the items is gloves. There's lots of different kinds of gloves that medical providers use, you know, you've got vinyl gloves, and nitrile gloves, and powdered, and non powdered, and the thicker and thinner, and all of that kind of stuff. And so there's like several different types of specific gloves that are in short supply that.... Casandra When you said gloves, I was picturing like knitted gloves. Like why? Brooke Sorry, no, like medical gloves. Casandra That makes much more sense. Brooke Just get your grandma's to start knitting, and it'll be okay. Casandra Yep. Brooke Also, testing supplies are in short supply for medical providers. And specifically, it was like the equipment used to collect samples, store samples, transport samples, for medical tests, that portion of it. And then I guess, ventilator parts are still in short supply, as well. Margaret I guess that makes sense, since everyone wants that. Brooke Yeah. So that's the medical side of things. And then other things out in the real world, this is one I hadn't heard about, but tampons, I guess I've been in short supply. So it's good time to learn menstrual extraction. If you know somebody that can teach you that if you want to learn, or looking for other options, if you haven't previously been open to trying things like menstrual cups, might be a time to do that. Margaret, this is a fun throwback to our first one, there was this thing that was in short supply that you mentioned, and that each of us have two have on our respective homes. Margaret Um, wind...I'm trying to come up with something clever, I know the actual answer, but trying to come up with something funny. Casandra Garage doors? Margaret Yeah, it's garage doors. Brooke To the point where like, if you're a contractor, and you're going to build a house, they're recommending that before you start with anything related to the building of your house, the very first thing you do is order the garage doors, because it will take basically the whole time for them to get there. Like the last thing that will arrive and that you will install in the house is the garage door because of how long they taking. Casandra I knew it! Casandra Okay, I feel like every, like it's a running joke, and you all will always bring up garage doors. And every time I'm like, But, why is there a shortage? And then every time I forget, so I'm gonna ask again. Why? Brooke I don't think we talked about why last time. Margaret I don't think we have a 'why.' I think that there's just a lot of shit that is like, my guess is because it's so specialized that they make a certain amount. And then I don't know, but it might be something more about new homes? I don't know, The answer is I don't know, Brooke Part of it is lumber. Because remember, lumber was in short supply, like lumber mills shut down early in the pandemic. And so there was like a lot of lumber that was not being produced. And then when they started up again, because the price of lumber has gone up the price of garage doors are like two or three times higher, depending on where you live than they were pre pandemic. And part of that's because the lumber is so much more expensive. Margaret Okay, but hear me out. It'd be prettier anyway, it's instead of having the kind that rolls up above, just have like big old barn doors that swing open, and just make them out of two by fours. And it will totally work. And I'm sure there's no specific reason that people have developed a much more specialized solution. Brooke Yeah, definitely not. Casandra And there can just be like a rope from the door to your fence. So when you drive up to your fence, you can just grab the rope and pull it. Margaret Yeah, totally. Casandra And that will open the garage door. Margaret Yeah, or some sort of like system where you like knock something over as you're driving up towards your house. It like knocks over the ball, that rolls down the hill and it hits the thing and then it does the thing. And then the garage door swings open and then hits something that it shouldn't have and then starts another chain reaction and then the whole neighborhoods on fire. Casandra Yeah, totally secure Brooke I was with you till the end. So a real nice Rube Goldberg type of garage door opening. Margaret Yeah, I think that is the solution for most of these things that we're missing. Like for example, lack of gloves. Have doctors considered using knit gloves? Brooke Really great point, Margaret. Really great point. Moving on. Computer chips continue to be in short supply.That was an issue like this time last year. It got a little better. Casandra Wait, what news? Brooke Computer chips, Casandra Computer ships? I'm sorry, I... Brooke The ones that go into like everything, like not just computers, but like they go into cars now, they go into your television, they go you know... Casandra My contribution today is going to be to mishear everything. Brooke That's alright, it's going to be way more fun that way. Margaret Okay, so tortilla chips, also chips conduct electricity, probably if you put enough electricity into them. Brooke I don't know if they have any conductive materials in them, Margaret. Maybe we need to add some metal to our tortilla chips. Brooke And then they can do this. Margaret Yeah. Margaret It's good for everyone. And just mark it for anyone who has braces that they should avoid them. Brooke Okay, yeah. Excellent. Renewable too because corn. Margaret That's not something I'm going to talk about later about. Anyway. Brooke Sadly, baby formula continues to be in shortage. Again, that's not making the headlines like it was when it first started. But, that is still a major issue. So, check on your people. Do what you can to help out there. Unfortunately, that's ongoing and doesn't still doesn't have a solution in sight right now. They've been...like they ramped up production on it and stuff, but it's just still not enough. And then the raw ingredients that go into make it too, of course, have continued to have problems. Here's a really sad one for you, Margaret. It's it's one of your favorite things. And the concept of this item tends to be a sponsor of one of those other podcasts. Casandra Guns. Margaret Oh no, smiling children? Brooke No, there's plenty of them. You only really need one. So that's, that's okay. Margaret Don't tell me that there's no potatoes. Brooke Potatoes are in short supply. Margaret This has gone historically badly for my people. Brooke There was like a whole famine or something. Except there wasn't. Casandra Something. Brooke Yeah, sorry. potatoes, potatoes in short supply. Okay. Casandra But it's like harvest potato season right now? Are they just already anticipating that there won't be enough potatoes? Brooke Yeah, that's part of it. Again, we've talked about in previous episodes, how like, there have been really weird climate shit happening, especially like in the US that's affected the growth and production of things. Like here where we live, our Spring was way long and cold and wet. And it really fucked up the growing cycles of things. So, loss. Casandra Yeah, my potatoes didn't do great. Brooke Yeah, exactly. Yeah. So there were losses due to that early in the season of like potato plants. And then they're not anticipating, you know, what they are getting out of the ground to be, excuse me, as plentiful as it might otherwise be. Or normally be. Yeah, that's sad. Less sad, Christmas trees are probably going to be in short supply again, this year, they're not sure. But, they were last year, and the conditions that cause that are looking to be much the same. So yeah, living things that get chopped down in order to decorate your house for a month, fewer of those. Sorry? Margaret Alternatives include decorating a living tree, or moving into a house that some old weird person left a fake Christmas tree in the attic. Or using last year's tree. Casandra I'm a big fan of rosemary trees, and then you just plant it. Brooke You can also paint a tree on your wall somewhere and then just set out presents. You can make out of cardboard with your children. Margaret Or, you can realize its pagan idols idolatry and realize that a true Christian would never celebrate Christmas. Casandra Or you can convert, and do Hanukkah, because they overlap this year. Brooke Yes, I love it when they overlap. Casandra Menorahs are pretty. Margaret There's so many options. Yeah. Brooke Okay, cool. And then our last supply chain thing, which will be a nice toss is that energy and fuel are in short supply and expected to be in even shorter supply, which means I can toss this to Margaret to talk more about that issue. Margaret Yay, everything's doomed. I mean, everything's gonna be fine. Somewhere in between these two extremes is the truth. Okay, so Europe is having a power crisis. And not the old fashioned kind where people decide they don't want kings anymore, but kinda about natural gas mostly. And, it is the worst energy crisis since World War II. And, there's a lot of causes of it. The most immediate cause, that is absolutely the most immediate cause, and it's, it's not the straw that broke the camel's back, it's like the two by four that broke the camel's back, is the is that Russia has responded...Okay, so no, I'm gonna start at the beginning instead. Okay, so for 20 years or so... Brooke No, start in the middle! Margaret So for 20 years or so, Euroupe has been trying to use fossil fuels...If I was really starting at the beginning it would be like: the economic project that is Europe was caused by stripping all of the natural resources out of the developing world. But, for the last 26 years, Europe has been like, "We want to be the seen as the people who are really good. And so we're going to use fewer fossil fuels." And so, for about 20 years, they've been trying to work on that. However, this has basically increased their dependence on other places, like Russia, primarily Russia, in this case, where natural gas imports cheap, natural gas imports from Russia have been absolutely a mainstay. However, this has been crisis for the past two Winters too, even before the Ukrainian war, basically. Because, if you're going to have renewables as the way that you're trying to make a sustainable world, it has to be coupled with degrowth, instead of just like continuing to have a growing thing, because like, actually, renewables create less power overall at the moment, right. So, increased dependence on Russia, and then Russia has not officially cut off natural gas exports to Europe, what they did instead is they stopped 89% of their natural gas exports. And, they did it by saying, "Oh, we have a leak, and we can't fix it because of the sanctions. So, I guess you have to stop the economic sanctions against us, or you don't get any natural gas." And so they're blackmailing the West, and I don't know, whatever, I mean, I don't expect better of them. They're in the middle of fucking fading and genociding Ukraine, so whatever. But, this is a problem. And also increasing drought that's been hitting Europe really badly, it fucks up a bunch of other things, too. It fucks up their hydroelectric. And then, it even fucks up their coal, because coal is transported by river. And, they can't if the rivers are too low. And so the Right wing wants to blame a lot of this on Germany's shutdown of like the completely safe nuclear power plants or whatever. But, I think that that's worth contrasting with...France is actually at half nuclear power right now, because corrosion, lagging repairs, and general lack of safety have caused the nuclear power plants about to...to have to operate at about half capacity. So nucular, actually, sometimes complicated. And the heatwave has also meant that they can't use river water to cool the plants, because there's the nuclear power plants, and the other, I think other power plants too, because they use river water to cool it. But, I think it's a combination of the river water being much hotter than it usually is. And then also much less of it. Though, the one weird thing that people are like hoping will like pull it through at the last minute is there's now this new micro nucular reactor that's supposed to be safe, because it uses molten salts and fuel rods. And it fits onto a tractor trailer and powers 1000 homes, and is not yet being produced commercially. But, it's like a thing that people say that they've developed. So, the UK has seen energy prices, the energy price increase has doubled since last year's increase. So, it's not like...energy prices aren't double, but they have grown at double the rate, protests are breaking out, people are starting to burn their utility bills. And what's kind of cool is that you'd sort of expect this kind of protest to kind of go in a Right wing direction about like, you know, fuck you, let's go frack or whatever. But, actually, it's, at least what I've seen is that the protests are mostly coming out of a Left wing and a-political position. And, a lot of is like pushing to nationalize gas, and basically say like, "This is fucked up. This is affecting the poor people more than anyone else." Gas being, in this case used for heating, but also is used for power generation, and then a lot of industrial manufacturing. And, this is not just a matter of rising costs, it's literally a potential in the next couple of weeks, there might be blackouts and power rationing. Various places are limiting power use, like businesses are being encouraged to turn off their air conditioners, and all this kind of stuff. And of course, everything happens in a vacuum with this kind of thing. So, there's no way...wait, no, no, this will cause stagnation economically and could easily trigger a recession. Margaret And the other thing that it does, is it creates this awful fucking feedback loop. We talked about last time where like the feedback loop of like, all this flooding, destroying Pakistan, causing them to get IMF loans, which cause more austerity, which cause more, you know, climate change or whatever, you have a very similar feedback cycle, in that it's the...because of this stuff that's happening, more fossil fuel production is happening, coal plants are coming back online. Fracking is no longer banned in the UK. And of course, the pipeline attack that didn't help any of this, that was probably Russia, but Russia blames it on the US, was the largest methane release in documented history. So, even though the pipes weren't even an active use, the fact that they were ruptured caused the largest methane release in documented history. And of course, it was the heatwave the summer that spiked power usage. And so, climate change causes people to get more desperate for power. So, we enter to a vicious cycle, which will definitely not have any effects anywhere but Europe, and we can probably be done with that issue unless someone else has something to say about it affecting elsewhere. Casandra Yeah, I was reading about how the domino effect is impacting the US. It sort of seems self evident, but I'll talk about it anyway. So it looks like 40% of the US of our electricity is generated by natural gas, which I didn't realize. So, you know, in the US, we either heat our homes with natural gas or electric, but natural gas prices impact electricity prices, maybe someone else can explain that to me, because I don't quite get it. But, the moral of the story is that when natural gas prices go up, all of the other prices go up as well. Yeah, they're expecting anything from a 17% increase to a third increase? I don't understand. Yeah, thank you. 33%. So that sucks. It's not as bad as Europe, like I'm looking at...I was looking at Germany in the UK, and it sounds like their prices are way, way, way, way higher, but it's still not gonna be great here. So, I was hoping we could talk about things that people can do. Like ways they can keep their home warm, and insulated and stuff like that. Brooke and I are both in the Pacific Northwest, which is known for its mild winters, but we also get lots of rain and damp and then Margaret is on the East Coast and has much harsher winters. So maybe between the three of us, we can come up with some good ideas. Brooke Let me start with what I tell my kid which is put on some socks and a goddamn sweater. Casandra And a hat. Feet and head. Margaret And then what I tell your kid which is, "If you if you make a...if you build a fire, if you build a man a fire, he's warm for a day, but if you set a man on fire, he's warm for the rest of his life. Brooke Well we do like to set men on fire in this house, so that's that's perfectly acceptable here. If any men come in, you can be set on fire for our warmth. Margaret Yeah, yeah, that's a renewable resource. Casandra Because, I mean, we know that lumber and wood prices have gotten up and you got to use something in your fireplace, Margaret And I hear that they're made out of wood. That's why we throw them in the lake to find out. Cause men are witches. Wait, hold on. Okay, so sweaters and hats, okay. Okay. Casandra Some things I learned. So clothes dryers can be up to 20% of a home's energy bill. I had no idea. And in my head, a dry...like drying racks aren't good idea where we live because it's so damp here. But maybe that's not the case. So, I'm gonna try that this winter. Checking...I've always rented so the the idea of like checking the filters and shit on my whatever way your home is heated has never occurred to me, but apparently that's super important. Right, Brooke? Brooke Absolutely. I'm gonna be totally honest, I don't know if that has anything to do with the, I guess it probably helps the efficiency of the device. Yeah, I do it every six months, because I know it helps the air quality in my house. And that's important. Casandra I don't even know how to do that. So you should come over. Margaret There's both filters in the HVAC. Sorry. Casandra Let me know, tell me more, I don't understand. Margaret As far as I understand, there's both the filters that are like the big screen filters that people are like run out and strap to their fans to do air filter cleaning, right? And then there's like, at least in my house has an oil heater and in an oil heater, there's a filter, an oil filter, and so my presumption is that it just takes more power to push things through a clogged up filter, both air filter and oil filter. That's my guess. The main thing I learned the hard way by moving somewhere with harsh winters and an oil furnace is that if you let your furnace run dry, it breaks. And so you actually have to keep it full, which is cool because my gauge is broken, so I just need to every now and then like call and be like, "Hey, can you fill it up?" And they're like, "How much do you need?" And I'm like, "I don't know. You fill it up." I did learn that heating oil and diesel are functionally the same thing, although you're not allowed to put heating oil in your car, because that they'd like stain it red so that you can get caught if you do that. Casandra Weird. Margaret Yeah, and there are some diff...please don't run out and put diesel in your home oil filter because you heard some girl who lives in the mountains tell you to. I haven't fucking done this. And but, some people I think sometimes like top off, like in a hurry. They'll do that if they keep diesel around for like their tractor or whatever the fuck. Brooke I mean, it's probably better than...may be....I'm guessing, totally guessing, that it might be better than letting it run dry, because that can be an expensive fuckup. Margaret Yeah, if you do that you have to change at very least the oil filter. And then if not the also the fucking spark plugs and all this shit and the parts are cheap, the capacity to do it without exploding things is harder. This is sort of beside the point that only applies to oil. Let's talk about other ways to heat homes. Casandra So, yeah, other ways to heat your homes or more like how to keep heat in. I was researching this anyway, because my house has lots of windows like huge, like walls of windows, which is beautiful, but they're all single pane and none of them seal. Like literally, there's no, I don't even, I still haven't figured out what this type of window's called, but it's like slats of...horizontal slats of glass sort of layered on top of each other, and you can crank it so they tilt open or crank it so they tilt shut, but there's nothing actually...like air just you know, comes in. So using that fun, classy plastic stuff that's temporary to cover your windows. That's one of my plans this year, the few windows that don't have that tilty glass, that's an official term, I'm going around the edges and caulking them. I checked on my door seals. I learned that they're like energy efficient electric blankets. Casandra I'm anticipating that if I set my set my thermostat a lot lower and like use those while I'm working during the day or even at night, maybe that will be helpful. Margaret Oh, that's cool. Brooke Heavy curtains can help too. With Windows. Casandra Yeah! Inulated curtains! Brooke That can be a real trade off if you have any like seasonal effective disorder, light issues, but like they can do a lot to keep the cold back if you have a heavy curtain that you hang over the window. Casandra Totally, yeah, those are super effective. Margaret And then you can play the fun game of opening them when the sun's out and then closing them when the sun's gone. Casandra Though here when the sun's out, it's colder. Margaret Oh, okay. Yeah. Casandra So, that's why we're all sad all winter. Margaret Yeah. Casandra Let's see, did I find anything else exciting? People are on social media right now sharing all of these like wild ideas about how to heat your house. And, I haven't tried these. I'm not going to vouch for them. But some of them are really interesting. So, one is like, when you're baking, you put very, already dry, that's important, bricks in the bottom of your oven, because they hold in heat. So, when you're done baking, you can open your oven and turn your oven off and the bricks will keep your house apparently. People are making a little like tea light and flower pot heaters. Margaret Can I talk shit on those really quick? Casandra Yeah, please do. Margaret They're bullshit. They're absolutely bullshit. Casandra I kind of figured. Also, like open flames? Margaret Yeah, no. And like actually, a lot of them the the actual clay pot can get hot enough to catch the candle wax on fire. And so, there's been like a bunch of houses, people have like burned down their houses trying to use these fucking things. And it would take like, I think it I looked this up the other day, it would take like hundreds of these to heat a small room. The time in which that this is a reasonably efficient thing to do is an emergency or survival situation. If you make...if you're in a fucking tent, if you're in, if you're in your house, you can do this, you can throw a blanket. If you're trying to heat up the space hidden under a blanket. A candle can be a meaningful part of that. But, if you're trying to heat up even a small room, they're not a meaningful part of it in terms of the trade off, but the stuff about thermal mass like these bricks, sorry, is it okay to just tangent on this? Casandra No please do. These are my like things that people are talking about that kind of sketched me out. Margaret Yeah, and so it's like in that I haven't specifically researched putting the bricks in the oven. What I would probably do, I mean, you want thermal mass thermal mass doesn't heat things. It's like a battery. It's a heat battery, right? And so like for example, what a lot of people do is if you put like...thermal mass is often like clay or something like that. Some people even historically use like stored jugs of water and stuff where the sun comes in and heats it up or wherever your passive heating comes from. Then it radiates out that heat once the heat sources gone. And so, you can keep your house cooler at night by having a lot of thermal mass. This is one reason why cob houses have some advantages in a lot of climates and adobe and all that stuff right. And concrete even, can actually act as thermal mass, although I don't know as much about the efficiency of that. Brick houses have an advantage for this. But yeah, like a lot of the hacks around like, "Oh, light a candle," are like just a really good way to burn your house down. Casandra Well, it's not even just a candle. People are like building...like constructing these like...you take a flower pot. You know what I'm talking about? Margaret Oh, yeah, totally. Yeah, so and that doesn't actually amplify...Okay, so this idea where you take the candle and you put the flower pot on top of it and the terracotta flower pot is amplifies the heat, it doesn't amplify shit, you can't amplify heat. That's like one of the laws of thermodynamics. But you can't store the heat and you can centralize the, so it doesn't get lost as much, right? So in some weird ways as maybe like a handwarmer, it would like be maybe a little bit more effective, right? Because Casandra That's an expensive handwarmer. I'm gonna knit gloves. Margaret Yeah, totally. And so it, the, the flower pot itself does get so hot, and especially if you put enough candles under it to make it useful. And you can see there's a bunch of like research that people have done, where they're like, "Oh, the flower pot gets up to 170 degrees with one candle or like 400 something degrees with four candles," or something roughly like that. I don't have the numbers in front of me. But, it doesn't make enough heat to fill a space. It instead is actually specifically preventing that heat from going out into the space, which is... Casandra Which is why it gets so hot. Margaret Yeah, totally. And again, like I mean, I don't know, and there's some advantages to it. But overall, however, I think the alcohol lamps that people make, the like DIY, there's like, like the heater block, and I think it's Philly, I can't remember. Brooke Portland has one. Margaret They like make...you can make alcohol lamps, as little portable heaters. And, and when you're talking about like a tent or something in a survival situation, they are fairly effective. I actually don't know enough about the BTUs that they put out to, to in terms of heating and other spaces. That that's beyond what I know. That what's my rant about candles, sorry. Casandra No, I appreciate the rant. My contribution was gonna be like, people are talking about sketchy shit that I don't know about. So confirming that it's sketchy shit is great. Yeah, I don't know. Do y'all know any other fun ways? I'm trying to think about like, my grandparents live in a really old house, and they have a wood stove, which heats one room. And the house is very long and thin. So, it heats one room on one end of the house and their bedrooms on the other end. So, all of the weird shit I've seen them do over the years to stay warm, like the window plastic, or those like long sock things that you put at the bottom of doors, you know, I'm talking about? Margaret Oh, yeah, totally. My house. I mean, I clearly bought my house with like 'prepper' in mind, but my house has the two different wood burning stoves, or one's a pellet stove, which are more like human energy efficient, but they require electricity, so a little bit more complicated. It's like a wood burning stove, but it's a little pellets of fuel that you can buy super cheap, but you have to buy them. You can make them yourself, but it's super labor intensive and complicated. I looked into it for a while. And then I have a regular wood burning stove in the basement and the wood burning stove is actually hooked into the HVAC like vent system in my house. And so that is something you can do is you can put a wood burning stove and hook it up to...this is not a simple retrofit. Installation in general, just fucking add insulation to your house however you can, which sometimes means like, you know, tearing open the walls and putting in more insulation or putting more insulation in your attic. If you have an attic or Casandra Covering your fireplace when you're not using it, that's one I'm learning. Margaret Oh, really? Oh, that makes sense. Because it just goes up out into the...Yeah, Casandra Yeah, even when it's closed, it can still suck heat out. Not using fans for too long, which sucks. I'm thinking about like bathrooms. You know? Margaret I see Yeah, yeah. Casandra Like, above your kitchen stove. Margaret Yeah, hmm, that makes sense. Brooke One thing I've done for the last several years to conserve energy use is to consolidate where in the house I am located and or with my person, or people are located to a single room or a portion of the house and then closing up the rest of it and closing the vents that go there and all of that and just focusing the heat on wherever I am or I am with my kid or whatever it is. Casandra Oh, closing the vents you're not using as a good idea. Brooke Yeah, so like when she's off at school while I'm working, I close the door to my office, close most of the rest of the house. And then when it's like the two of us, we'll hang out in just her room with the vent open, or just our two bedrooms that are next to each other with vents open. Margaret And it's it's another advantage of people who choose to live communally is that I mean more people in a house is just going to warm things up a lot, like putting a bunch of people into a room with closed...that's like closed off and insulated is a real good way to stay warm. So like, I don't know, use this as an opportunity to get close to someone, I mean, very consensually and stuff. Brooke I was gonna say cuddling. Cuddling is a good way to provide heat. Margaret Get a dog. Brooke Or fucking Margaret I take back the part about the dog. Okay. Casandra They're also, both in Europe and I know state by state and the US, there're also energy and utility assistance programs and grants that have always been available, but it's seems like more are starting to become available. So, if you live somewhere colder than me, it's a good thing to look into. Margaret Well, and then also in Oregon, starting in 2024, Medicaid is going to cover expenses related to climate change in terms of like, generators and air filters and shit like that. Brooke That's amazing. I haven't heard that. Margaret I just read about it while I was getting ready for this episode. Brooke If you think you may qualify for one of the energy assistance programs, that's something to look into sooner rather than later, like, Now, instead of before the colds get real high, or the bills get real high. I know that one of the programs here in our town, for instance, only has a few days a month in which they accept applications. And we'll even close that, you know, for the next month if they got too many in the previous month kind of a thing. Casandra Yeah. Yeah, then, yeah. The The only other thing I wanted to bring up with all of this is that, you know, we've talked in past episodes about how expensive food is getting and how expensive everything's getting, and with rising energy costs, that's just going to contribute to inflation more because of businesses are having to pay more money to stay open. You know? Margaret Yeah. Brooke But Biden just passed the Inflation Reduction Act, so everything's gonna be fine now. Casandra Right? Brooke He did it. Casandra Okay? Brooke He solved it. Margaret Yeah, thanks, O-Biden. Casandra 'O-Biden?' is that what you said? Brooke Haven't you heard that joke? Margaret Usually, it's because you want to complain about something. The gas prices are high, like, "Thanks, O-Biden," because people always said, "Thanks, Obama." Casandra Okay. Yeah. Thanks for explaining jokes to me. Brooke Well, Biden's just Obama's puppet. I mean, haven't you heard that he's old and senile, and it's actually just secretly Obama still running the country through Biden? Margaret Who's totally not old and senile. Casandra I mean, according to Tulsi this morning, it's it's actually the elite Cabal. So. Brooke There's a whole other conversation I want to have with you about why everyone is so anti--fucking-semetic. But that's like not on our topic list. Casandra Oh, gosh, the French Revolution. Brooke If we want to do a segue I really really want to talk about it. Casandra Now we're gonna segue to talk about the French Revolution. Margaret Welcome to Mediocre People Who Made Lateral Moves, the new podcast about all the revolutions that have happened Casandra and how people blamed it all on the Jews. Margaret The only revolutions accepted are the Haitian Revolution, the Mexican Revolution kinda, yeah. Anyway, Brooke This is the thing I don't understand. Like, why why is anti-semitism been such a global thing for fucking ever? Like, I can't think of another group of people that have had it quite like the Jews. Casandra It's called the coldest hatred for a reason. Margaret I mean, everyone has it different. I think anti-blackness is also real fucking old and anti-indigenous as soon as we find y'all. Casandra There's these interesting accounts of of...We should not go on this tangent. Brooke But it's interesting. Casandra I could talk for too long. Brooke It's topical. Casandra It's always topical. Brooke Exactly. Casandra Oh, what were some of our other fun topics? Margaret Okay, let's talk about hurricanes. Can I talk about hurricanes? Casandra Hurray! Margaret Oh, wait first I wanna talk about about corn really quickly. It's like a short note. Okay, so by 2053, the Corn Belt won't be able to grow corn. Brooke What? Casandra Wow. Margaret Because there will be days 125 degrees Fahrenheit or higher. And of course, corn is already having trouble now. It's not like a switch that will be flipped in 30 years. And also, my cynical ass has been proven right every time someone's like, "All of the X will happen by 2080." I'm like, that's gonna be way sooner. And then like 2020 comes around, they're like, "Yeah, nevermind this is sooner." And then so some of the solutions that people are trying to come up with around this, some of them are like make a lot of sense about like, being a little less monocroppy and like, and people are like getting really into perennial grains. But, of course they're doing it in like weird capitalist ways. So there's like weird named ways to be less monocrappy. And there's also this perennial grain that's like trademarked called Kernza which is a plant name with a little reserved symbol after his name. So that's how you know, it's good. And basically, a lot of the existing perennial grains are actually more like hays and things are for foraging. And so intermediate wheat grass is Kernza. It's a type of intermediate wheat grass, which is not actually wheat, but has a similar grains. However, they're currently trying to hybridize it with wheat and it's hard to bake with because it's not as gluttony. Unfortunately, it still has some gluten, so it's not the solution for that problem, either. But, people are trying to do some weird shit. Then I could talk about hurricanes unless y'all wanna talk about corn. Casandra Most grass seed is edible. That's my contribution. Brooke Also tubers. So plant yourself some day-lilies, dahlias. Casandra Turnips. Brooke They're pretty and then you can eat them. Casandra We should bring back neeps as a instead of mashed potatoes, mashed neeps. Margaret Y'all are just making up things. Casandra We're listening now. Margaret Casandra's always making up plants that don't exist. There's only three plants: corn, potato, and grapes. Casandra I thought it was wheat. Margaret Oh, yeah, and wheat. Brooke I know you've seen apples. And also, I've given you kale. So. Margaret That's just fancy. It's just different forms of...okay to be fair, broccoli, kale...Can you help me list off all of these things that are the same plant? Casandra Brassicas? Margaret Yeah. Brooke Cauliflower? Brussels sprouts, cabbage, mustard. Margaret Everything is already secretly...the the secret cabal that we should be blaming is the brassicas. Casandra Plant families? Margaret No, just brassicas, because they're everything. Everywhere you look, it's brassicas. Casandra Unless it's a nightshade. Brooke I get what you're looking for. And I'm with you. Margaret Okay, so hurricanes. So, there's two things about hurricane survival. And one is like this, like promising thing, although it ties into some bougie shit is that like....cause obviously, people who are listening this...a lot of people are listening to us have dealt with hurricanes more immediately and recently than any of the three of us have. And so I don't mean to be light hearted about like, you know, like, whatever I want to say that, like people are dealing with this shit...I, I'm not trying to...It's a big fucking deal. Okay. One thing is that communities absolutely can be built to survive hurricanes. And it isn't done because people aren't rich enough. And because doing so is incentivized, and because people don't value this, right. It's like a combination of these things. Have you heard of this small town called Babcock Ranch that survived Hurricane Ian? Brooke Nope. Margaret Okay, there's this. It was built in 2015 People started moving into in 2018. It's a 2000 home community. And it's, it's sort of like actually mixed class a little bit. The houses start at 200,000 and go up to a million dollars. And it's, and they're like working on building condos and stuff. And it is meant to survive hurricanes. This is in fucking Florida. And it got hit by Ian. And so it makes sense to build things are meant to survive hurricanes. The streets are designed to absorb water. I think that they're designed to absorb water into like, basically almost a French drain system that runs underneath where there's like pipes or whatever. I know that they are capable of making this like some kind of concrete that water can just like flow right through. And I think that's what's happening. Yeah, Brooke Yeah, pervious concrete. yeah. Casandra What is that not everywhere? Brooke More expensive, Margaret Because people don't value infrastructure in this country. And and then there's, they use native landscaping everywhere to like limit flooding. They do all this stuff to like, make sure that...because flooding kills more people in hurricanes than wind. And so they do all of this stuff with native landscaping to limit flooding. The power and all the communication lines are buried, which is another thing that should just be happening everywhere, but isn't. Like where I live, I lose power all the fucking time, because like, "Oh, sorry, a tree fell on a power plant. Power Pole." Casandra Are you laughing at me Brooke? Brooke I'm picturing your backyard right now where you could like, garrote yourself with your power lines in your back yard. Casandra That my landlord is like, "This is not a problem." Yeah. Margaret Yeah, no, totally. And like, every...where I live like a tree falls on...it's like, it's like once a month, I lose power for a day, because I'm in the fucking mountains with really shallow soil, and so the trees fall over every time there's a windstorm, but we're in the fucking mountain. So there's wind storms all the time. Anyway, so they bury their power and internet lines. And the whole town has it's own solar array that powers like all of it, and 8000 other nearby homes. And so, to that 2.6 million people lost power during Hurricane Ian but not Babcock Ranch. And this was its first like trial by fire. And to be and to be fair to them they weren't total assholes about it. It wasn't like "I've got mine fuck you." They turned their school into a shelter for all the nearby folks, because it still had power even though, it like I think I think it couldn't be registered as an official storm shelter because didn't have a generator. But, it didn't need one. Casandra Cause it didn't need one? Margaret Because it had its own fucking micro grid. Casandra Wow, amazing. Bureaucracy. Margaret Yeah. So that's like, what we could be doing, right? We could have a society that like, prepares for these things, you know, and like there are ways to build things if people are able, if people are able to have the resources or like institutions are willing to give resources to make things that are appropriate to their area you know, you can have fire resistant homes you can have...I mean everything would just be concrete domes if I had my way as of the past six months, but then I'm sure get over this particular infatuation with concrete domes, but they're like everything proof. Okay, anyway. Except aesthetic proof. Okay, so actually, okay, whatever. The other thing that's... Brooke Also concrete is not great for the environment and climate change. It's really bad, actually. Margaret Yeah, but it has actually weirdly, I haven't looked in this little while, there's the embedded greenhouse gases and in terms of how long it lasts are like, compare favorably in a lot of ways. And also in terms of its insulating...Well, its insulating properties because of thickness. The way it's constructed is...the way it's made is not nice. You can you can also disagree with me about this. Brooke No, that's fair. And there's been recent research and work into putting cellulose into concrete mixtures that actually helps. I can't remember all the beneficial properties of it, but some really cool research that's out there about about mixing wood fibers. Margaret That's cool. Plus brutalism is way cooler than...anyways Okay, whatever. Now everyone's gonna hate me if I start talking about liking brutalism. Alright, so hurricanes, I have never survived a hurricane, just to be really clear. And so I'm not trying to tell everyone....okay, but I it's my disclaimer, I researched... Brooke You've also never not survived a hurricane. Margaret That's true. Oh, I see what you're saying. Every time I'm in a hurricane, I die. I've been playing this...I want...this video game I've been playing called...Okay. So, God, what if I was...the ultimate prepper would be Groundhog Day guy. That's what he really should have done. Margaret You ever seen that movie "Hurricane Day" where the person has no...groundhog, whatever, as a movie,... Casandra What? Casandra What does Groundhog Day have to do with hurricanes? Margaret Okay, but if you died and came back every single day, you could do so much research. The ultimate scientist Casandra No one can see me putting my head in my hands. Brooke They just heard the thunk of your skull on the table there. Margaret Alright, so what to do if you live in the path of a hurricane and you don't live in a little weird prepper neighborhood. First of all, if you live in a mobile home, I'm sure you already know that life sucks, because classism is real and awful, but mobile homes are in a really bad situation. And I'm sure you already know that. Hurricane timing is forcastable, but its course is less predictable. So, you can start knowing that a hurricane is possible, but you won't necessarily know where it exactly where it's going and exactly what kind of power it will have by the time it lands. Flooding kills more people than wind. And basically the best that I've been able to read and find different people have researched this is that like overall evacuating if the instructions say you should evacuate is probably the best move. And, voluntary evac happens before mandatory evac. Voluntary often comes earlier to basically give people to get a head start, because when everyone tries to leave an area all at once it fucking sucks. I'd love to at some point, talk to someone who has done more work into evac, and like talk about like what it means to transport oneself over a roads during those kinds of crises. But, and to be clear, mandatory evacuation doesn't mean they come around at gunpoint to force you out, it means that no one will help you while you stay. At least that's the official version of it. If you're going to stay or rather, if you like think that you might be stuck, consider being able to survive two weeks without outside help or without the grid. And the grid in this case means water. And it means probably the ability to heat food if you run on a municipal gas line or power, right. And that also means electricity. And so you want like for example 15 gallons of water per person in storage containers. You want two weeks of non refrigerated food that doesn't require utility cooking gas, because maybe you have a separate gas stove you know, or you're planning a cold cans of chili or whatever. You want a battery or hand crank radio, you want to get medical kit. If you're trained, you want a chainsaw, but one of the main ways that people kill themselves in the wake of disasters is using chainsaws incorrectly to try and like move down trees and stuff. One of the other main ways is like propane and propane accessories, and people trying to use like shit that you shouldn't use inside inside. Don't run a fucking generator in your house or your garage. Make sure everyone has a flashlight. When you're prepping your house. You want to bring in everything in your yard like furniture and tools. You want to get directions to local evacuation shelters and you want to have them printed out and or like saved offline in Google's maps. You want to prepare your house for internal flooding by moving shit up off the floor, and like getting everything that you don't want to get wet available. Make sure it's able to stay dry. You want to know how to shut off your utility gas, water and electric in your house. You do want to fill up your bathtubs for extra water, but don't fucking rely on this. This isn't the like "Haha," everyone's like , "Oh it's cool I got like you know this bathtub filled with water." You usually want to use bathtub water more for sanitation water. You want to turn your fridge and freezer to the coldest settings and make sure they're packed full of thermal mass like we were talking about. Thermal mass is also a battery for cold as well as heat. So for example, your freezer works way less hard if it's full of frozen bottles of water. And so, if you feel plastic water bottles like 90% full, and this is true generally speaking, right? A full fridge or freezer works way less hard. And, because you know it's not stuff that disappears every time you open the fucking door whatever. In general, your fridge or freezer can last about two days without power if they're like real packed full of thermal mass and set to the coldest. In terms of long term preparation for your house, if you live somewhere and you're trying to retrofit shit, you kind of want to go through and make sure that there's hurricane ties attaching your roof to your house. And do the same with your deck and shit, which are just basically these like metal straps that attach one piece of wood to another piece of wood. If you look up hurricane ties, you'll see pictures of them. And then you can go up to your attic or whatever and look to see if you have them. And you can you can retro actively add this, because what happens, the way that wind destroys a house, first, it like pulls off like shingles and siding and stuff that only sort of matter. And then it starts breaking out windows with debris, and doors flying open because of wind, and stuff like that. But then eventually you get to the point where the fucking roof rips off your house is like one of the main things, and then once the roof rips off your house, then the walls have nothing supporting them, so then they fall over. And so you can do a lot of stuff with your doors also to help protect them, especially if you have like double doors, you can add bolts to the inactive door, the door that doesn't open, or the door that doesn't have the handle or whatever, and you had bolts that go up into the ceiling and through the floor. It's also stuff that makes your house harder to break into, which is like cool bonus, right? And garage doors, our old friend garage doors. Casandra Why we're really talking about this. Margaret I know Margaret They they can be storm proofed, but it means you buy a new one. And, I have a feeling that they are expensive and hard to get right now. Like old articles are like "Oh, they cost between $1,000 and $5,000 for a storm proof garage door and I assume that that is not easily the case right now. Okay, and in terms of covering your windows, you want to cover all the windows in your house, not just the ones facing the water. And ideally, if you live there like long term, you want to actually get storm shutters, but those can be expensive. Worst case scenario, you can screw plywood or metal roofing over the windows and glass doors. With plywood you want to aim for about a half inch thick at least, half inch to five eighths. And particle board, don't use particle board or MDF, because probably not strong enough. I don't know and there's just like other shit right like you keep your car packed and facing outward with gas in it. However also, you might want to keep it in a garage and or at least next to a solid building, so that it doesn't fucking blow away or get destroyed by things. Fill up an extra gas can or two because fuck it there's often gonna be gas shortages after these sorts of things. Don't fucking drive through floodwater, that is another way that people die all the fucking time. Like it's about a foot or something of flood that will move a car that will like take a car away. It's way less than you think. Don't fucking drink floodwater. Most of the ways that people water filter don't filter out like gasoline and all kinds of other shit. With a generator, don't fucking run it inside. During the storm, don't go outside during the Eye of the Storm, it'll come back suddenly. Stay away from your windows and glass doors and such. Don't take a shower or a bath because of electrical risk. Kill the power of the main breaker if flooding is coming. And that is what I learned not through direct experience, because again I've died every time I've tried these...I've never been in a hurricane. I've been on the coast rain some storms, right, some tropical storms and shit. But I've never personally been through a hurricane. Brooke Full circle. Casandra We should add like Hurricane Preparedness Guide to our list along with the First Aid Guide. That'd be cool. We should talk to like Mutual Aid Disaster Relief folks or someone. Margaret Yeah. Agreed. Casandra Cool. But this isn't a Strangers meeting, so... Margaret No. Welcome to our Strangers meeting. Brooke You hurri-'can' survive. Margaret Hurri-'can't.' It's a hurri-'can', not a hurri-'can't.' But, that's...the hurricane itself can destroy houses. It can't...It's a hurri-'can' destroy houses not a hurric-'can't' destroy houses. Got it. You see what I'm getting at. It's a funny joke. Brooke You're hurri-canceled. Love it. Casandra When Margaret makes jokes... Brooke Margaret makes great dad jokes and I love it. So does my kid. Casandra It's us, not you. Margaret I say a few short things with our last five minutes. Margaret No, no, it's fine. It's fine. I mean, I'm trying to make you laugh, so you all laughing works. Okay, so I don't know, what other what other shit? I got. I got like some like little short things. Is anyone else have a major topic? We should talk about it? Should we go into short things? Margaret Okay, here's the ones I've got. Other people add them at the end. Monkeypox transmission is slowing. There's a small chance it's gonna go endemic, but like overall. monkeypox transmission is slowing. And that's cool. You should still go get fucking vaccinated, though. I should go get vaccinated. LA is installing water restrictors in houses of people who break their water limit, including like including rich people, which is great. Like basically if anyone is using more than 150% of their limit like they're going around and just like literally being like, "You get less water now." The Mississippi River is currently so low that grain and fertilizer transports are halted. Brooke And that's contributing to supply chain shortages in all kinds of ways, because they can't get stuff up here. Margaret It also fucks up China. They apparently...a lot of them...They get a lot of soybeans from the US, and 40% of the US soybean export to China comes through the Mississippi River. The Army Corps of Engineers, don't worry as dredging the river to deepen it. Brooke Great. Margaret So that they can still ship things there. Brooke I'm sure that no part of the Mississippi River is a Superfund site or anything like that, and highly toxic. Margaret Nah, it's fine. I'm sure it's good. I bet everyone who's working that job will be treated well. And a British Columbia river has dried up, and I think a bunch of British Columbia rivers have dried up. They're facing like one of the worst fucking droughts ever, which has killed 65,000 salmon, and has cut spawning by 70%, at least in this area. Bird flu in California is killing a ton of birds. I saw this thing, I was like reading oh, it's like a bird flu again. Goddamnit. And then I'm like, Oh, it's just killing birds...Wait, no, birds are good. Casandra Yeah, we need birds. Margaret Yeah. Oil prices might go up again, because OPEC countries are cutting oil production more. Thanks. O-Biden. Inflation is causing manufacturers to start using cheaper ingredients. That's like one of the main ways that like manufacturers are getting around this. And so like a lot of shit they're used to using and trust might now be made like shit. Casandra I've read about new homes they're building as well. Margaret Oh, great, because that's what we need is cheaper designed homes. Casandra Yeah, they're like, A) don't buy a home right now. But B) when you can buy a home in the future, maybe someday don't buy homes built right now. Brooke I hear that. Margaret That makes sense. Brooke But Biden passed the inflation Reduction Act, you guys, so it's gonna be fine. Margaret Yeah, the fine print is like, "Now use refined," I don't know, whatever, "corn syrup instead of..." Brooke And the Federal Reserve is raising the target interest rate. So, it's gonna be fine. Casandra Have you all seen the new like COVID antivax study that just came out? Margaret No. Brooke Nope. Oh, we were supposed to die yesterday. Casandra Apparently, I'm using air quotes, a study came out linking the risk of like heart disease with COVID vaccines in 'men' in particular, something like that. And so, you know, anti vaxxers are like, "See!" Margaret I wonder if it came out because...the the one that I had heard was that there was a study that came out and I don't have these numbers in front of me, and I'm sorry, audience. I think it's, I think that the the rate of death among Republicans is 18% higher than the rate of death among Democrats, with all other factors considered, as soon as the vaccine came out. And like, yeah, exactly just the vaccine came out people who didn't get it just fucking die more. Brooke Comparative Study. Margaret Conspiracy, to try and kill all the Republicans, by the Republican leaders. No, no, wait, go ahead, Brooke. Sorry. Brooke No, I was gonna give more details on the study. But y'all can y'all can look it up. It was definitely aninteresting study. And it's not like 100% due to COVID for sure. At least they can't like rule out... because it was like measure of excess deaths. And they don't have all the specifics on that. But yeah, a large portion of that is due to vaccine versus not vaccine. Than also there was some tweet that made the rounds that that we were all going to die on October 10 because something was gonna get activated in the vaccine. Y'all see this on Twitter at all? Margaret That explains why I died in the hurricane. Casandra I want to back up to the study I mentioned because I didn't clarify that there were like major issues with it. That's all. I didn't want. I didn't want to bring up like this study antivaxxers are using without saying like there were major issues with the study. Margaret Yeah. That makes sense. Casandra Yeah, that tracks. Margaret Well, does that do it for us this month? Casandra That was a lot. It really was a lot of bad things. Margaret Oh, one good final thing. Tankers that go around with like, all the stuff that they ship around, are starting to add sails back, and it saves about 10% of their fuel. This is a really minor thing. Brooke Sailing sails? Margaret Yeah, yeah. Brooke Math. Nice. Margaret Like all the container ships and shit. Not all of them, but they're starting to add sails to container ships to help alleviate the cost of fuel to move everything around. Whatever it is a really minor thing. I just thought was neat. This is my final note. Casandra Yay, sailboats. Margaret Yeah. The global economy that got us into this mess in the first place trudging along. Casandra Ohhhh. Well, stay warm out there, everyone. Margaret Brooke, you want to lead us out? Brooke Yeah, I do. So, I took your outro from from the last episode and transcribed it. I'm just gonna I'm gonna read it word for word, Margaret. Margaret Oh, God. Brooke Are you ready for how great this is gonna be? Margaret Yeah, let me hold on to something. Alright. Brooke And then maybe I'll do a real one after I do this. Thanks so much for listening. Algorithms suck, but if you like this podcast, please like comment, review, blah, blah, blah. It makes the algorithms give our show to more people. It's kind of the only way people end up hearing about our shows is word of mouth. All of that stuff's true. I'm not just saying it cynically, it's just that I have said it, like, whatever, I'm on Episode 50, or whatever. So I've said it like 50 times, and you can support us on Patreon by supporting our publisher, our publisher is Strangers In A Tangled Wilderness. The three of us are collective members of a collectively run publisher called Strangers In A Tangled Wilderness. It's been around for like 20 years, but it's like getting new mega forces Voltron combines version of itself lately, and it's primarily supported by Patreon. Brooke I think that was perfect. Flawless. And also, that means that Inmn doesn't have to transcribe it again. Margaret Yeah. Brooke You're welcome, Inmn. Just copy/paste. But more seriously, this podcast is produced by the anarchist publishing collective Strangers In A Tangled Wilderness. And you can connect with us on Twitter at Tangledwild. And I think we have like Instagram and stuff too. But I don't do Instagram and I think Instagram's

RACT manual co-author Eugene Silberstein joins the podcast to talk about the titular topic of his book, Pressure Enthalpy Without Tears.  Pressure Enthalpy Without Tears is a book that introduces engineering concepts to HVAC technicians in a way they can understand and apply in the field. Enthalpy is a fancy way of saying “heat,” and we use it to refer to the total heat content (BTUs). The pressure-enthalpy chart shows the relationship between the refrigerant pressure and enthalpy in a system; it's like a P-T chart that shows the relationship between heat content instead of temperature.  Each refrigerant has its own pressure-enthalpy chart, but the points and lines on the chart usually form a right trapezoid. Dirty air filters and other less-than-ideal conditions can distort the trapezoid or shift it on the chart. Each side of the trapezoid represents the refrigerant inside a major component of the HVAC system: evaporator, compressor, condenser, and metering device. The pressure-enthalpy diagram allows you to get a look at individual components while keeping the entire system in mind.  To plot points on a pressure-enthalpy chart, you need the high side pressure, low side pressure, condenser outlet temperature, evaporator outlet temperature, and compressor inlet temperature. Pressure is usually measured in absolute units (rather than gauge units), but ballpark estimates are typically sufficient. Entropy is another concept we need to consider. Compression theoretically leaves no additional entropy and is reversible. Crossing a line of entropy means that a process is no longer reversible. Eugene and Bryan also discuss: Technicians vs. engineers Temperature vs. heat content Psychrometric and pressure-enthalpy charts Using the pressure-enthalpy diagram to assess operation costs Electrical measurements Predicting compressor failure Putting passion into learning and trades education   You can visit https://www.escogroup.org/ to purchase Pressure Enthalpy Without Tears and access all of ESCO Group's resources. You can also use the code HVACSchool22 for a discount on ESCO Group's eLearning services. If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

In this short podcast, Bryan explains what the heat of compression is and why we should care about it as HVAC/R professionals. More heat is rejected in the condenser than absorbed in the evaporator coil, and that's because the compressor adds heat. That added heat is called “heat of compression.” That heat does NOT contribute to the net refrigeration effect (NRE), as it doesn't contribute to cooling. When we compress something, we increase the system entropy during that process. Entropy is the waste and disorder associated with work. There is some inefficiency, which we see in the form of additional heat. So, the HVAC system needs to reject that additional heat of compression, and we can plot and track reversible changes by following lines of constant entropy. As the temperature increases, the molecules begin moving more quickly. However, the refrigerant doesn't absorb many more BTUs in the compressor (in a properly operating system). The temperature spikes, but the compressor doesn't typically add a significant number of BTUs to the refrigerant. Heat also enters the system via the suction line, which also doesn't contribute to the NRE. Long, uninsulated suction lines can absorb a lot of heat without cooling the space at all. That heat also has to be rejected in the condenser. So, short, well-insulated suction lines tend to absorb less heat. When plotting the heat of compression, we're looking at BTUs added into the system in the compressor, discharge line, and suction line. BTUs that don't contribute to the NRE may fall under the “heat of compression” label, though the actual definition may vary by organization.   Check out Eugene Silberstein's book, Pressure Enthalpy Without Tears, at https://escogroup.org/shop/itemdetail.aspx?ID=1445.  If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

In this short podcast, Bryan explains what the net refrigeration effect (NRE) is and how it affects HVAC systems. The net refrigeration effect (NRE) is what happens in the evaporator coil. The evaporator is the heat absorber; as air passes over the coil, the cooler refrigerant within the evaporator absorbs that heat and boils. The NRE is the net energy change that occurs during that process. You can plot the NRE on a pressure-enthalpy chart. When air moves over the evaporator coil, there is a change in enthalpy or BTUs per pound in the refrigerant (usually called delta h). There should be more BTUs per pound in refrigerant exiting the coil than when it went in. We have to know how many pounds of refrigerant we're circulating (mass flow rate) and how many BTUs are in those pounds. Many of those BTUs come from latent heat transfer, which happens when the refrigerant boils. When refrigerant undergoes a phase change, it remains at a constant temperature (sensible heat), but it continues absorbing heat. The heat absorbed contributes to the phase change, and that's latent heat. Most of the NRE deals with those latent BTUs. (Note: this does NOT refer to latent heat loads.) In addition to the boiling or saturation phase, we also have to consider BTU changes when refrigerant flashes off at the beginning of the evaporator coil and heat obtained during the superheating phase at the top of the coil. We can maximize our NRE by running a cold evaporator coil (without freezing) and ensuring the evaporator is full of boiling refrigerant. BTUs absorbed in the suction line do NOT count towards the NRE, as they don't contribute to cooling spaces or refrigerated boxes.   Check out Eugene Silberstein's book, Pressure Enthalpy Without Tears, at https://escogroup.org/shop/itemdetail.aspx?ID=1445.  If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.

In this short podcast episode, Bryan talks about ERV and HRV technologies, including their appropriate applications and limitations. HRVs are heat recovery ventilators (not to be confused with heat recovery units or HRUs), and ERVs are energy recovery ventilators. The main difference between these two lies in the type of heat they move; HRVs only move sensible BTUs, whereas ERVs move sensible and latent BTUs.  As you bring air in from outside, you're discharging roughly the same amount of air (though modern technologies allow you to manipulate the pressure a bit more). The goal of the HRV or ERV is to recover some energy from the air exiting the structure and incorporate it into the incoming airstream. The airstreams cross over each other, and there is heat transfer but not air mixing. (ERVs also allow for the exchange of moisture.) Two fans drive the direction of energy flow, and a mesh or a porous desiccant medium facilitates the interaction between the airstreams. You will get some energy savings with an HRV or ERV, but savings are dictated by the amount of air moved and the temperature differential between the airstreams. In general, you will see HRVs up north (in low-humidity markets) and ERVs down south (in higher latent-heat markets). However, even ERVs aren't very effective in conditions with low energy transfer and high moisture UNLESS they're used with a ventilating dehumidifier. Bringing in fresh air is good for indoor health and safety, as it helps dilute the presence of VOCs, viruses, and harmful gases. HRVs and ERVs help us manage the air we bring in. Bryan also covers: Integrating ERVs with bathroom ventilation Safety considerations to consider for outdoor air Positive pressurization Demand ventilation with CO2 sensors Learning about ASHRAE 62.2   If you have an iPhone, subscribe to the podcast HERE, and if you have an Android phone, subscribe HERE. Check out our handy calculators HERE.