Podcasts about vrf

Every Bitcoin Layer 2 quietly depends on a trusted operator to order transactions and that's the single point of failure Jeremy Rubin wants to kill. In this MIT Bitcoin Expo conversation with Bitcoin Magazine's Shinobi, Rubin breaks down Char Network, a decentralized shared sequencer that lets anyone participate like a miner. He explains how staked Bitcoin gets burned the moment a participant cheats, and why anchoring proof of stake to Bitcoin avoids the pitfalls of standalone PoS chains.Grab your copy THE 2036 ISSUE

In this episode of the HVAC Know It All Podcast, host Gary McCreadie talks with Daniel Carrillo, Technical Sales and Training Expert at Airzone Control, about ducted zoning systems for VRF and inverter HVAC equipment. They discuss how Airzone controls airflow using thermostats, sensors, and modulating dampers to improve comfort and efficiency in different zones of a home or building. Daniel explains how the system avoids high static pressure by adjusting fan speed and damper positions based on demand. The conversation also covers the advantages of ducted zoning over wall-mounted systems, common problems with older zoning methods, and how proper duct design helps improve HVAC performance and airflow control. Gary and Daniel Carrillo discuss how Airzone zoning systems work with VRF and inverter HVAC equipment to improve comfort and airflow control in homes and buildings. Daniel explains how thermostats, sensors, and modulating dampers help manage each zone without creating high static pressure in the duct system. The conversation covers how fan speed changes based on demand and why dampers stay open when there is no heating or cooling call. They also talk about the differences between ducted zoning and wall-mounted systems, common problems with older zoning methods, and how proper duct design helps improve HVAC efficiency, airflow balance, and system performance. Expect to Learn: How Airzone zoning systems control airflow in different rooms using thermostats and sensors. How modulating dampers and inverter fan motors help prevent high static pressure issues. How ducted zoning systems can improve comfort and efficiency compared to wall-mounted units. Why older zoning systems used bypass dampers and the problems they created for HVAC equipment. How proper duct design and airflow control help improve HVAC performance and system balance.   Episode Highlights: [00:00] - Sponsor: Factory Direct Filters ad [00:42] - Intro to Daniel Carrillo in Part 02  [02:21] - How zoning works: thermostats vs. sensors explained [03:58] - Controlling zones via Blue Face thermostat or cloud app [05:56] - What happens when one zone is set too cold [07:28] - No demand = dampers open; fan stops unless constant mode on [10:18] - Ducted zoning vs. wall mounts: regional differences [13:03] - Old zoning problems (bypass, barometric relief) solved by ECM motors [16:49] - How to get free system design (blueprint, zone layout, heat load needed)   This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse!   Follow the Guest Daniel Carrillo on:  LinkedIn: https://www.linkedin.com/in/daniel-carrillo-922262305/   Airzone Control - LinkedIn Profile: https://www.linkedin.com/company/airzonecontrol/   Airzone Control - Website: https://www.airzonecontrol.com/as/en/    Follow the Host on: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/  Website: https://www.hvacknowitall.com Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/   Instagram: https://www.instagram.com/hvacknowitall1/  Follow the Podcast on:  YouTube: https://www.youtube.com/@HVACKnowItAll   Spotify: https://open.spotify.com/show/6LCBJGw0EHG03rdWHxUMce  Apple Podcast: https://podcasts.apple.com/us/podcast/hvac-know-it-all-podcast/id1359253455 

In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by Daniel Carrillo, Technical Sales and Training Expert at Airzone Control, to talk about A2L refrigerants, VRF zoning, and how new mitigation standards are changing HVAC system design. They discuss the challenges of using A2L equipment in residential and commercial spaces, how zoning systems can help improve airflow and safety, and why proper training is important for contractors. The conversation also covers common installation issues, communication errors, wiring practices, and how ducted zoning systems can improve comfort, efficiency, and room-by-room temperature control. In this conversation, Daniel and Gary discuss how A2L refrigerants are changing HVAC system design and why new mitigation standards are important for safety and airflow control. Daniel explains how zoning systems can help manage refrigerant dilution, improve comfort, and support better efficiency in VRF and ducted applications. Daniel and Gary also cover common installation issues, communication errors, wiring practices, and the importance of proper training when working with advanced zoning equipment and A2L systems. Expect to Learn: How A2L refrigerants are changing HVAC equipment and installation standards. How mitigation standards help improve safety and refrigerant dilution in occupied spaces. How zoning systems can improve comfort, airflow control, and energy efficiency. How communication errors and wiring issues can affect VRF and zoning equipment. How proper training and support can help contractors work with advanced HVAC systems.   Episode Highlights:  [00:00] - Sponsor Ad: Factory Direct Filters [00:42] - Intro to Daniel Carrillo in Part 1 [03:00] - A2L is slightly flammable, brings new regulations and mitigation standards [06:26] - How A2L affects VRF zoning - ductwork helps comply vs. wall mounts [09:32] - Top tech support tips: same supplier, training, don't fear calling [11:24] - Most common field issue: communication errors from loose connections [15:03] - Advantages of ducted zoning: fine-tuned air, no oversizing, better humidity control [19:08] - Four-room example - each room has its own climate, unused rooms get no air This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/hvacknowitall Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Guest Daniel Carrillo on: LinkedIn: https://www.linkedin.com/in/daniel-carrillo-922262305/ Airzone Control - LinkedIn Profile: https://www.linkedin.com/company/airzonecontrol/ Airzone Control - Website: https://www.airzonecontrol.com/as/en/    Follow the Host on: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ LinkedIn - HVAC Know It All Inc.: https://www.linkedin.com/company/hvac-know-it-all-inc Website: https://www.hvacknowitall.com Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/  Instagram: https://www.instagram.com/hvacknowitall1/  Follow the Podcast on: YouTube: https://www.youtube.com/@HVACKnowItAll Spotify: https://open.spotify.com/show/6LCBJGw0EHG03rdWHxUMce Apple Podcast: https://podcasts.apple.com/us/podcast/hvac-know-it-all-podcast/id1359253455

In this action-packed live stream episode of HVAC School, host Bryan is joined by Eric Kaiser, Ty Branaman, and Roman Baugh for a continuation of a deep-dive conversation on vacuum practices — picking up where a previous episode left off with Andrew Greaves and Jim Bergmann. The team sets out to both reinforce the foundational best practices every HVAC technician should follow and to explore some genuinely uncharted scientific territory around how vacuum gauges actually work, how refrigerant contaminates micron gauge readings, and what really happens to moisture inside a system when temperatures drop below freezing. A central revelation of the episode is Eric's explanation that modern electronic vacuum (micron) gauges do not actually measure pressure directly — they measure heat transfer and translate it into a pressure reading. Because these gauges are calibrated to nitrogen or air, the presence of refrigerant vapor in a system (which has roughly three times the heat conductivity of nitrogen) can cause the gauge to display a falsely high reading. This means a technician could believe the system still has poor vacuum when it may actually be further along than indicated — or, more concerning, that a system appears to have passed vacuum when contamination is still present. The team acknowledges that controlled experiments are needed to quantify exactly how much refrigerant affects the reading, and they commit to designing those tests. The conversation then pivots into the physics of water at the triple point — the precise pressure (4,580 microns) and temperature (32°F) at which water can exist simultaneously as solid, liquid, and vapor. Eric walks the audience through a phase diagram built from International Association for the Properties of Water and Steam data, explaining that once pressure drops below the triple point, liquid water no longer exists. Any moisture in the system either sublimes directly from solid ice to vapor or remains frozen. This has major practical implications: a system with ice inside can still pull down to a very deep vacuum, but will not pass a decay test until that ice is fully sublimated — which requires both sufficient vacuum depth and available heat energy. The colder the ambient environment, the deeper the vacuum must go to create the temperature differential needed to drive sublimation. The episode wraps with an illuminating discussion on refrigerant oils — specifically the differences between POE (polyolester) and PVE (polyvinyl ether) oils and how each interacts with moisture in fundamentally different ways. POE chemically bonds with water through hydrolysis, breaking down into acid and alcohol and permanently degrading the oil. PVE, on the other hand, physically traps moisture through surface tension and can hold up to twice as much water as POE, but remains chemically stable. This distinction affects vacuum strategy, dryer sizing, and long-term system reliability — particularly in VRF and cold-climate heat pump systems where compressor oil management is far more complex. Topics Covered Core vacuum best practices refresher: large hoses, removing valve cores, skipping the manifold, using clean pump oil, micron gauge placement, and decay testing Why micron gauges measure heat transfer — not pressure — and how refrigerant vapor causes false-high readings on the gauge The impact of refrigerant retained in compressor oil on vacuum accuracy and the potential role of nitrogen sweeps in displacing refrigerant molecules Triple point science: what happens to moisture when pressure drops below 4,580 microns and why liquid water no longer exists below that threshold How ice inside a system can allow a deep vacuum pull-down while still failing a decay test, and what that means for cold-climate HVAC work The role of heat during evacuation: why adding heat accelerates moisture removal and how deep vacuum increases temperature differential to drive sublimation Cold-climate challenges: vacuum pump limitations, micron gauge accuracy at low temperatures, and the physics of dry air in freezing environments Triple evacuation and nitrogen purging: whether nitrogen disrupts oil pockets, displaces refrigerant, or both — and why the team wants to test it Nitrogen tank quality concerns: the possibility that low-grade nitrogen could introduce moisture and whether an inline dryer would help Using system flush chemicals: why Ty cautions against flushing agents and the risks of adding additional chemicals that break down oil POE vs. PVE oil chemistry: how POE undergoes hydrolysis when exposed to moisture (creating acid) versus how PVE physically traps water without chemical breakdown Dryer strategy for large commercial systems, VRF, and VRV: filter dryer sizing, core pulls, oil sampling, and why an "oil dialysis machine" would be a game-changer Plans for future controlled experiments: testing refrigerant effects on micron gauges, ice behavior at various temperatures, and vacuum performance in cold climates Industry influence over time: how community-driven knowledge sharing has already shifted vacuum and refrigerant practices over the past decade Whether you're a residential technician looking to sharpen the fundamentals or a commercial refrigeration specialist wrestling with VRF oil contamination, this episode delivers both practical takeaways and a front-row seat to the scientific inquiry that drives best practices forward. As Bryan puts it: "Don't wait for us — if you want to do the experiment, be part of the conversation."   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 long-awaited live episode of HVAC School, host Bryan Orr reunites with three industry veterans — Jim Bergmann of measureQuick, Roman Baugh (Kalos), and Andrew Greaves of NAVAC — to tackle one of the most pressing and underaddressed challenges in modern HVAC: performing refrigerant recovery and system evacuation in extreme cold-weather conditions. The conversation was sparked by a real-world observation from technician Chris Hughes, who relocated from Louisiana to Minnesota and quickly discovered just how different — and difficult — cold-climate HVAC work can be. What follows is an honest, science-heavy, and often humorous deep dive into a problem the industry has largely ignored. The episode centers on the growing prevalence of cold-climate heat pumps, especially inverter-driven systems capable of operating at extremely low outdoor temperatures. As these systems become the primary heating source in cold regions, technicians are increasingly being called to make repairs — and perform evacuations — in sub-zero conditions. The group walks through why this is such a challenge, examining the fundamental physics that make pulling a proper vacuum nearly impossible once temperatures drop below 40°F. The conversation draws heavily from refrigeration science principles that, as Jim Bergmann bluntly points out, were largely left out of HVAC trade education over the past several decades. One of the most compelling moments of the episode is Andrew Greaves' introduction of the "heat provocation test," a term he coins on the spot to describe a technique for verifying whether moisture has truly been removed from a system by observing micron gauge behavior after applying external heat to cold-soaked components. This sparks a rich debate between Jim and Andrew about where moisture actually concentrates in a system — in the line set vs. the outdoor unit — and whether heat can realistically reach those areas in a real-world installation. The panel ultimately agrees that heat is the only viable tool when you absolutely must complete a job in cold conditions, but that prevention and scheduling remain the gold standard. The episode closes with a fascinating dive into the phase diagram of water, specifically the concept of the "triple point" and how it governs moisture behavior at low pressures. Andrew uses a whiteboard diagram to explain why, below 4,500 microns, moisture can only exist as vapor or solid — not liquid — and why that makes sublimation the only removal pathway when heat is absent. Jim adds nuance by describing the self-refrigerating cycle that occurs during deep vacuum pulls, a phenomenon that makes the problem progressively worse the deeper you pull without adding heat. The group wraps up with practical field takeaways and a promise to revisit the topic, including the potential role of nitrogen purging and triple-evacuation techniques in cold-weather scenarios. Topics Covered The rise of cold-climate heat pumps and why they demand refrigerant work during cold seasons Why evacuation becomes extremely difficult — or impossible — below 40°F ambient temperature The physics of moisture removal: heat energy, vapor pressure, and molecular movement Jim Bergmann's real-world demonstration pulling a vacuum to 135 microns on a wet system and still failing the decay test Andrew Greaves' "heat provocation test" — using external heat sources to verify dryness after evacuation The debate over where moisture concentrates: outdoor unit vs. line set Why mini-split manufacturers don't allow permanent desiccant dryers — and workarounds using temporary bypass configurations VRF systems and how shell dryers can be temporarily added and then removed post-evacuation The self-refrigerating cycle: how pulling a vacuum on ice makes the system progressively colder and more resistant to drying Phase diagram of water: the triple point (~4,580 microns) and why liquid water becomes unstable below it Why sublimation is the only moisture removal pathway below the triple point Gibbs free energy and its role in determining which phase (solid, liquid, vapor) a substance will occupy Hot nitrogen purging as a method for carrying moisture out of open line sets Push-pull recovery technique to maximize refrigerant removal in cold conditions The challenge of vapor recovery in cold weather — leaving multiple pounds of refrigerant behind Practical field solutions: insulated tarps, portable propane heaters, belly band heaters, heat guns Dry ice cold-trap brainstorm as a creative moisture capture method The dual-fuel argument: why Jim advocates for backup heating as the real long-term solution How rapid industry growth in the mid-20th century led to mechanics being trained instead of engineers, losing foundational science in the process Why this topic matters more now than ever as cold-climate compression refrigeration becomes mainstream   You can watch the original livestream on YouTube HERE. Learn more about the book Review of Vacuum for Service Engineers or purchase it from TruTech Tools. 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 of the HVAC School Podcast, host Bryan sits down with Johnny, the creator behind the popular social media channel "Let's Be Techs." Johnny brings a wealth of hands-on experience to the table, having spent his first 13 years in residential HVAC before transitioning into commercial refrigeration. He shares his unconventional path into the trade—starting out building houses before being recommended to an HVAC contractor—and how the lack of quality mentorship early in his career motivated him to create educational content for technicians. His videos, which began as a fun hobby and a way to teach his helper remotely, have since grown exponentially across TikTok, YouTube, and Facebook, and continue to attract technicians hungry for practical, real-world knowledge. The bulk of the episode is a deep dive into real-world troubleshooting strategies, covering everything from the very first moments you arrive on a job site to diagnosing complex intermittent electrical faults. Bryan and Johnny both emphasize the value of using your senses before reaching for specialty tools—listening for surging liquid lines, feeling condenser airflow with your hand, and visually inspecting service valves for oil before removing caps. They share a mutual philosophy that the best technicians are those who can step back, assess the big picture, and narrow down the problem systematically rather than immediately jumping to assumptions about charge levels or component failures. A significant portion of the conversation centers on low-voltage electrical diagnostics, an area where both techs have noticed major changes over the last several years. Bryan and Johnny discuss the rise of contactor coil failures, transformer overload from aftermarket add-ons like UV lights and zone dampers, and the clever use of a contactor in place of a fuse as a low-cost short-finder tool. They also revisit the concept of "tattletale" fuses and resettable fuses, comparing their reliability and appropriate applications. Throughout these discussions, both hosts bring in personal war stories that make the technical content feel grounded and immediately applicable to everyday service calls. The episode wraps up with discussions on thermal imaging cameras, scroll compressor anomalies, and a memorable consulting story from Barbados involving a VRF system. Johnny and Bryan also touch on the importance of sharing knowledge openly in the trades, pushing back against the gatekeeping mentality that leaves newer technicians struggling to find reliable information. Both agree that the comment sections of field-focused videos have become a valuable community resource—a place where techs teach each other, correct each other, and build a collective knowledge base that benefits the whole industry. Topics Covered Johnny's background: from construction to HVAC apprenticeship to commercial refrigeration How "Let's Be Techs" started as a fun hobby and grew into a major social media presence Using your senses first: listening, looking, and feeling before pulling out specialty tools Checking service valves for oil and inspecting caps/seals before connecting gauges Walk-in cooler first-response checklist: fans, thermostat display, suction line frost, liquid line surging Feeling condenser airflow direction to diagnose dirty or clogged coils Identifying capacitor and contactor issues from the moment you approach residential equipment The rise of contactor coil failures and how location-based dirty power contributes Transformer overload: understanding the 40 VA / 24V current rating and why a 5-amp fuse doesn't protect windings Aftermarket add-ons (UV lights, dampers, zone systems) overloading low-voltage circuits Float switches fusing closed from excess current draw The contactor-as-short-finder trick: a DIY alternative to the Short Pro tool Adding individual circuit fuses ("tattletale" fuses) for isolating intermittent low-voltage shorts Resettable (popper) fuses: reliability issues and why 3-amp versions outperform 5-amp versions Contextual diagnostics: thinking about when and why a fuse blew (weather, season, recent activity) The 225°F discharge line rule for monitoring compressor health Scroll compressor oddities: running backwards, check valve failures, and starting under equalized pressure VRF system quirk: electronic expansion valves staying open when power is cut to one air handler Thermal imaging cameras: practical applications in the field including electrical panels, motors, condenser coils, and compressor racks Using black tape (gaffer's tape) to improve thermal imaging accuracy on shiny surfaces Megohmmeter use for finding wire shorts that are intermittent but close to failing The importance of anti-gatekeeping: sharing knowledge freely and learning from community feedback   Follow Johnny on social media as "Let's Be Techs" on YouTube, TikTok, Facebook, and Instagram. 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.

This is a reset episode. After months of working behind the scenes, Heather and Mike Bayer come together to do something they have not done for a while: reintroduce themselves, take stock of where the Vacation Rental Formula Business School is now, and talk honestly about what they are building next. If you have been a long-time listener, this is your update. If you are new, this is the best place to start. The conversation covers the full VRF ecosystem, from the just-completed first cohort of the AI Ambassador Program and what Heather has already learned from running it, to the newly launched THRIVE Essentials onboarding course, the opening of five consultancy slots, and the decision to build community through Substack rather than another standalone platform.  What comes through clearly is that the focus has sharpened. VRF is no longer trying to serve everyone in the STR industry. It is building specifically for professional operators who are ready to bring AI into their businesses in a structured, responsible way, and who want experienced guidance rather than just another tool recommendation. About Heather and Mike Bayer Heather Bayer spent 20 years managing CottageLINK Rental Management in Ontario, growing it to nearly 200 properties before selling in 2022. She has hosted the Vacation Rental Success Podcast since 2014, making it the longest-running podcast in the STR space, and has spent the last two years building a focused AI education practice for property management professionals. Mike Bayer is CEO and co-founder of the Vacation Rental Formula Business School. He works across strategy, marketing, technology integration, and community, and joins Heather on the podcast periodically to discuss direction and new programmes. Key Takeaways The AI Ambassador Programme just completed its first cohort. Heather is already rewriting Module 2 because the tools she built the course around have shifted in the months since she wrote it. The second cohort launches in May and will include returning members alongside new participants. A knowledge base is the non-negotiable foundation for any meaningful AI adoption. Before touching any tool, operators need documented business context that gives the AI something real to work with. Without it, output is generic. The AI Ambassador role is not a tech job. It is the person in a company who understands the business well enough to see where AI can reduce friction, and who has the trust of the team to guide adoption without creating resistance. Think conductor, not programmer. THRIVE Essentials is a short onboarding course for new STR employees who may have no background in property management. It covers industry structure, operational roles, technology foundations, values, compliance, and a new AI-in-the-workplace module focused on ethics and safe use. The consultancy model is a 90-day intensive followed by nine months of monthly coaching. It is capped at five clients at a time, starts with a free hour-long discovery call, and is specifically designed around AI adoption and integration. It is not coaching in the general sense; it is bespoke problem-solving for a specific business. Community is now on Substack, specifically the Grounded in AI group. After trying several platforms over the years, Heather and Mike landed on Substack because it combines articles, short notes, and a chat forum in one place with a genuine mobile app, which has consistently been what makes community work for people who are managing a business during the day. Resources and Links Mentioned AI Ambassador Programme - vacationrentalformula.com/AI [TBC - confirm final URL] Thrive Essentials - link in show notes [TBC] Grounded in AI Substack community - free subscription, link in show notes Consultancy enquiry / free discovery call - link in show notes Shortcuts - vetted STR trainers, consultants, and coaches [TBC - confirm URL] VR Nation Conference - 28–30 April, Heather presenting on AI foundations Scale UK Conference — Brighton, 9 June, Heather presenting on AI adoption foundations Shortcuts webinar - 23 April, "What You Need to Know Before the Magic Begins" Connect With Heather and Mike Bayer The best place to connect is the Grounded in AI Substack Community, where Heather posts daily and responds to comments. If you are curious about the AI Ambassador Programme, Thrive Essentials, or consultancy, head to the show notes for the relevant links, or reach out directly through Substack. Heather's Substack: groundedinai.substack.com [TBC — confirm handle] Vacation Rental Formula Business School: vacationrentalformula.com ________________________________________________________________________________________________________

In this episode of the HVAC Know It All Podcast, host Gary McCreadie talks with Christopher Rystedt, Technical Sales and Trainer at Airzone Control, about air distribution and zoning with VRF and inverter systems. In Part 2, they discuss common applications such as hotels and residential homes, and how zoning can work with multiple brands and system types. Christopher explains how modern zoning avoids bypass dampers by adjusting fan speed and system capacity based on demand. They also cover ventilation modes, zone weighting, and how airflow is balanced across different spaces. The conversation wraps up with setup tips, training options, and how zoning can help manage refrigerant limits and reduce system size and cost. Gary and Christopher discuss how modern HVAC zoning systems work with VRF and inverter equipment in both commercial and residential applications. They explain how systems can control multiple zones or units from one platform, even across different brands. Christopher describes how proper duct design and variable fan speed help avoid the need for bypass dampers while maintaining correct airflow. They also cover ventilation settings, including local and system-wide fan operation, and how zone weighting helps balance airflow based on duct size. They finish by talking about system setup, training resources, and how zoning can help reduce refrigerant use and overall system costs.   Expect to Learn: How HVAC zoning systems can control multiple rooms using VRF and inverter equipment. How one platform can manage different brands and types of HVAC units together. Why proper duct design and variable fan speed help eliminate the need for bypass dampers. How ventilation modes work at both the zone level and system level to move air. How zone weighting and system setup help balance airflow and improve overall performance.   Episode Highlights: [00:00] - Sponsor: Factory Direct Filters ad [01:08] - Intro to Chris Rystedt in Part 02  [02:10] - Main applications: Hotels, villas, and residential  [04:34] - Airzone history: Spain (1997), North America (2021)  [06:57] - Inverter systems vs. traditional bypass dampers  [09:21] - Ventilation modes: Local and global settings  [13:29] - Christopher's role: Technical sales and trainer  [18:33] - Training resources and A2L refrigerant benefits    This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/ Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse!   Follow the Guest Christopher Rystedt:  LinkedIn: https://www.linkedin.com/in/christopher-rystedt-62258597/   Airzone Control - LinkedIn: https://www.linkedin.com/company/airzonecontrol/   Airzone Control - Website: https://www.airzonecontrol.com/as/en/  Follow the Host: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/  Website: https://www.hvacknowitall.com Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/   Instagram: https://www.instagram.com/hvacknowitall1/  Follow the Podcast:  YouTube: https://www.youtube.com/@HVACKnowItAll   Spotify: https://open.spotify.com/show/6LCBJGw0EHG03rdWHxUMce  Apple Podcast: https://podcasts.apple.com/us/podcast/hvac-know-it-all-podcast/id1359253455

In this episode of the HVAC Know It All Podcast, host Gary McCreadie is joined by Christopher Rystedt, Technical Sales and Trainer at Airzone Control, to discuss VRF and VRV zoning and how it applies to air distribution systems. Christopher explains how zoning can be used with inverter-driven equipment to deliver precise comfort by controlling airflow to individual spaces using modulating dampers and smart controls. The conversation covers how Airzone integrates with over 200 HVAC brands through manufacturer-supported communication protocols, allowing full system functionality without losing performance. Gary and Christopher also explore system design, control strategies, and how modern zoning helps reduce equipment load while improving comfort and efficiency. In this conversation, Christopher explains how VRF and VRV zoning can be applied to ducted systems to control airflow to individual rooms based on demand. He describes how modulating dampers and smart controls adjust airflow levels instead of simply opening or closing, allowing the system to match capacity to the exact needs of each space. Christopher and Gary discuss how zoning works with inverter-driven equipment and why proper communication with indoor units is important to maintain performance. They also cover system setup, including thermostats, sensors, and control wiring, and explain how this approach helps improve comfort, reduce equipment load, and provide more efficient operation. Expect to Learn: How VRF and VRV zoning can control airflow to different rooms using one ducted system. Why modulating dampers adjust airflow levels based on the exact demand in each space? How communication with indoor units allows zoning systems to maintain full equipment performance. What components, like thermostats, sensors, and control boards, are used in a zoned system setup? How proper zoning design helps improve comfort, reduce system load, and increase efficiency. Episode Highlights: [00:00] - Sponsor: Factory Direct Filters ad [00:00] - Intro to Christopher in Part 1  [02:36] - What is Air Distribution Zoning? [05:14] - What Air Distribution Zoning Is [08:33] - Airone Zone Damper Demo & How It Works [10:32] - Compatibility with 200+ VRF Brands [13:09] - System Setup: Sensors, Dampers & Wiring [17:49] - Building Automation, App Control & Integration This Episode is Kindly Sponsored by: Cintas: https://www.cintas.com/ Cool Air Products: https://www.coolairproducts.net/ Factory Direct Filters: https://www.factorydirectfilters.com/ SupplyHouse: https://www.supplyhouse.com/tm Use promo code HKIA5 to get 5% off your first order at Supplyhouse! Follow the Guest Christopher Rystedt: LinkedIn: https://www.linkedin.com/in/christopher-rystedt-62258597/ Airzone Control - LinkedIn: https://www.linkedin.com/company/airzonecontrol/ Airzone Control - Website: https://www.airzonecontrol.com/as/en/ Follow the Host: LinkedIn: https://www.linkedin.com/in/gary-mccreadie-38217a77/ Website: https://www.hvacknowitall.com Facebook: https://www.facebook.com/people/HVAC-Know-It-All-2/61569643061429/  Instagram: https://www.instagram.com/hvacknowitall1/  Follow the Podcast: YouTube: https://www.youtube.com/@HVACKnowItAll Spotify: https://open.spotify.com/show/6LCBJGw0EHG03rdWHxUMce Apple Podcast: https://podcasts.apple.com/us/podcast/hvac-know-it-all-podcast/id1359253455 

In this short episode, the HVAC School team members talk with Jim Bergmann (measureQuick) and Renee Tomlinson (ESCO) about the latest and greatest that they brought to their booths at the 7th Annual HVACR Training Symposium. First, JD Kelly spoke with Renee about ESCO Institute's educational offerings. ESCO offers a mix of books and online training content, including new training for A3 refrigerants, a new CO2 (R-744) training manual, and the newly released second edition of System Performance. ESCO has been working with Visual 3D Academy to bring augmented reality (AR) training to the market. Beginners and advanced techs alike can find training material to benefit their careers, as ESCO offers courses on fundamentals for beginners and specialized knowledge for those with more industry experience. ESCO's HVACR Learning Network allows you to access all ESCO courses with a monthly subscription package or purchase access to individual courses, such as if you only need one or two courses of specialized training. Then, Roman Baugh spoke with Jim Bergmann about the latest developments to measureQuick, especially as it has expanded in both breadth AND depth. The unlimited-use subscription has been a positive development that has been well-received, and Jim Bergmann's latest update in development aims to make the value even better with improvements to workflows (creating a hybrid between regular and guided workflows). Developments have also included improved support for VRF systems and all of those systems' operational considerations. The core function of measureQuick is to bring visuals to data, and measureQuick is implementing AI to reduce user errors, such as when it comes to label-reading and ensuring that pressure-temperature data matches the system. User testing is also rigorous to ensure that the software works as intended and to minimize tech support calls for the app itself, and Jim has spent the past several months on user testing in advance of the update's rollout.   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, Bryan answers a question submitted to HVAC School by an aspiring licensed architect who wanted to learn more about the many different types of HVAC systems. The three main buckets of HVAC systems are air-to-air, water-source, and air-to-water. Air-to-air systems move air around to remove heat from one space, and that heat is rejected to the air somewhere else. Water-source systems move water around the building and use water as the heat rejection medium. Air-water hybrid systems condition the load with water and may use air for ventilation; water or air may be used as the rejection medium. Systems may be direct-exchange (DX) and may transfer heat directly to refrigerant, or they may flow the air or water over a coil with water or glycol, utilizing a secondary fluid. Systems may also have separate indoor and outdoor architecture (split systems), or all components may be rolled into a single box (package unit). Package units include window units, PTACs, and RTUs. When it comes to forced-air systems, constant air volume (CAV) systems maintain the same volume of airflow (though the temperatures will change). Variable air volume (VAV) systems use one stream of cold air in a main duct, and each zone has a VAV box that functions as a damper to control zones individually. Dual duct systems have one cold duct and one warm duct that run parallel to each other and mix at each zone. Packaged rooftop units (RTUs) are self-contained with ducts that run down into the space and are common in retail spaces. Air-to-water systems use fan coil units (FCUs) fed with chilled or hot water. Air moves locally inside the space, so there is less ductwork and good zone control, but there are many units to manage. Chillers make chilled water, and that water is pumped around the building and sent to individual air handler units (AHUs). These are highly efficient and have large amounts of piping. They need mechanical rooms and dedicated personnel to maintain them. Variable refrigerant flow (VRF) systems are DX systems that are becoming more popular and consist of multiple indoor units with one or more outdoor units. Some of these can be used for heat recovery, meaning one space can be cooled while another is heated. Heat pump types include air-source, water-source, and ground-source. Air-source heat pumps absorb heat from the air via one unit and reject it via the other; the outdoor and indoor units can swap functions. Water-source heat pumps are common in commercial applications and have multiple heat pumps tied into a water loop that tries to stay within a given temperature range via boilers and cooling towers. Ground-source or geothermal heat pumps pick up heat from the earth's stable temperature and are highly efficient, but they have high installation costs. Passive systems come in all sorts of varieties and reduce the HVAC system's loads but don't replace HVAC systems in North America. Mechanical systems consist of straight-cool (air conditioner with electric heat), furnaces (gas, propane, or oil combustion), or heat pump (reversible air conditioners) systems.   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, Bryan and Roman dive deep into one of the most challenging topics in modern HVAC: making VRF (Variable Refrigerant Flow) and ductless systems perform effectively in humid climates like Florida. The conversation tackles a common misconception that inverter-driven equipment automatically handles humidity well simply because it can "turn down." Roman emphasizes that successful application of VRF technology in humid environments requires skilled professionals who understand building science, envelope integrity, and proper system sizing. The biggest takeaway? If you're going to err on sizing, undersize rather than oversize - these systems will run longer and maintain better humidity control when properly sized. The hosts explore the three critical factors for dehumidification: runtime, coil temperature, and surface condensation. They explain how traditional inverter systems were programmed for energy efficiency by allowing coils to warm up as they approached the set point, which unfortunately sacrifices latent capacity. Modern systems with active dehumidification capabilities use expansion valve control to "starve" the coil, lowering saturation temperature to around 35-37 degrees while extending runtime. Roman shares his personal experience with a 7,000 BTU unit serving his 700 square foot master bedroom suite, demonstrating how proper application and understanding of equipment capabilities can deliver excellent humidity control without oversizing. The discussion takes a practical turn as Bryan presents a comprehensive troubleshooting checklist for humidity problems, starting with bulk water leaks and progressing through envelope integrity, duct sealing, equipment selection, and pressure balancing. They debunk common "solutions" that actually make problems worse, like adding attic insulation or solar attic fans without addressing root causes. The conversation reveals a counterintuitive truth: reducing sensible load through excessive insulation can worsen humidity problems by reducing equipment runtime. They explain why "active dehumidification" through overcooling isn't true dehumidification, and why another solution - reheat - requires adding sensible heat back to spaces to maintain longer equipment runtime. Topics Covered: VRF and inverter sizing misconceptions - Why undersizing is often better than oversizing in humid climates Three factors of dehumidification - Runtime, coil temperature, and surface condensation explained Active dehumidification technology - How expansion valve control creates longer runtime and colder coils Equipment capacity ratings - Understanding that a "12K" unit may actually perform at 18,000 BTU Latent vs. sensible capacity - Why checking engineering specifications is critical for humid climate applications VRT (Variable Refrigerant Temperature) - When this energy-saving feature should be disabled in humid climates Fan operation strategies - Why continuous fan operation can worsen humidity problems Duct and envelope leakage - How pressure imbalances drive moisture problems Surface condensation - Why vents and ducts sweat and how to prevent it The overcooling trap - Why lowering the set point creates interstitial space moisture problems Humidity sensors in thermostats - Understanding what they do (and don't do) Load diversity and zone control - How multiple smaller units can outperform single large systems Reheat strategies - From electric resistance to passive solar gain Common mistakes - Why attic insulation and solar fans often worsen humidity issues Troubleshooting checklist - A systematic approach from bulk water to equipment selection   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 candid and comprehensive episode, Bryan sits down with Roman to tackle one of the most frustrating yet crucial aspects of the HVAC industry: technical support. What starts as a conversation about their own tech support nightmares quickly evolves into a deep dive examining the entire ecosystem—from manufacturers and distributors to technicians and sales reps—and how each player can improve the support experience. Roman opens up about his recent tech support struggles, including having to search Russian websites just to find service manuals for major brand equipment. This leads to a broader discussion about the fundamental problem: as HVAC equipment becomes increasingly complex with proprietary controls and advanced technology, manufacturers have simultaneously made it harder to access the information needed to service that equipment. The conversation highlights how the old "I never called tech support" mentality of veteran technicians is no longer viable when you're dealing with VRF systems, building automation, and equipment-specific protocols that require specialized knowledge. The hosts emphasize that good documentation isn't just helpful—it's essential, and manufacturers who hide behind "brand protection" are actually damaging their reputation in the long run. The episode doesn't just complain about problems; it offers real solutions. Bryan and Roman discuss what technicians need to do before calling tech support (hint: know your superheat, subcooling, and basic electrical readings), what makes great tech support personnel, and why investing in these roles pays dividends. They share inspiring examples of distributors and reps who go above and beyond, like the Johnstone team in Louisiana who actively seek out field experts when manufacturers can't provide answers. The conversation also touches on why tech support and education roles are chronically underpaid, and how properly compensating and supporting these positions could transform the industry. Perhaps most importantly, the hosts emphasize that everyone in the HVAC ecosystem is working toward the same goal: keeping end clients comfortable and satisfied. When manufacturers, distributors, reps, contractors, and technicians recognize this shared objective and work collaboratively rather than defensively, everyone wins. The episode concludes with practical advice for sales professionals, including the importance of ride-alongs and adopting the "I got it" mentality that turns good salespeople into indispensable partners. Topics Covered Service Manual Accessibility: The critical need for manufacturers to make documentation easily searchable and available online, not hidden behind outdated processes Manufacturer Responsibilities: Why "protecting the brand" often backfires and how transparency builds loyalty Technician Preparation: What basic measurements and troubleshooting steps should be completed before calling tech support Tech Support Personnel: The importance of properly compensating and supporting tech support staff to reduce burnout and turnover Distributor and Rep Excellence: How the best wholesalers and reps go beyond just forwarding emails to actively solve problems The "I Got It" Sales Approach: Why taking ownership of customer problems is the key to building lasting relationships Cross-Brand Part Referencing: The need for universal parts cross-referencing across sister brands and product lines Field Ride-Alongs: Why B2B sales professionals should spend at least one day per month in the field with technicians Legacy Product Support: The frustration when manufacturer partnerships dissolve and orphaned equipment becomes unsupportable AI in Tech Support: Why throwing technology at support problems without understanding the root issues is a waste of money   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.

Engineered Systems caught up with Laura Michel, Trane® Ductless Portfolio Manager. Hear current VRF and Ductless HVAC trends and discover how innovative solutions and updated standards are driving the next phase of VRF. Sponsored by Trane.

Не припомню, чтобы мы хоть что-то рассказывали про микросегментацию. Пора. Кто Павел Коростелёв. Руководитель отдела продвижения продуктов. Код Безопасности Ольков Евгений. Технический директор TS Solution. Основатель и автор образовательного проекта NetSkills. Про что: Виды микросегментации Сегментация в физических сетях - база. Виртуализация роутеров и межсетевых экранов (VRF, контексты) North-south и east-west. Что в этих сторонах света? Неочевидные проблемы и приколы. Пропускная способность, инвентаризация, SLA изменений. Многовендорье и решения класса Network Security Policy management Микросегментация в виртуализованных сетях - исторически базовый кейс для SDN от VMware. В чем отличия и что дало? SDN, Network function virtualization и Service chain для средств сетевой безопасности. Что можно прикрутить дополнительно? Микросегментация в облаках и гибридных средах. Оставайтесь на связи Пишите нам: info@linkmeup.ru Канал в телеграме: t.me/linkmeup_podcast Канал на youtube: youtube.com/c/linkmeup-podcast Подкаст доступен в iTunes, Google Подкастах, Яндекс Музыке, Castbox Сообщество в вк: vk.com/linkmeup Группа в фб: www.facebook.com/linkmeup.sdsm Добавить RSS в подкаст-плеер. Пообщаться в общем чате в тг: https://t.me/linkmeup_chat Поддержите проект:

Quotes from the Episode: “If it helps one person, then it's worth its weight in gold.” —Roman “Stop asking ‘What if I fail?'—ask ‘What if I'm amazing at this?'” —Roman “I ran into the fire and rescued my future self.” —Roman (riffing with Bill)   Roman Baugh—third-generation tradesman, educator at Kalos Services, and prolific HVAC content creator—joins Bill and Eric for a lively conversation that starts with mustache banter and lands on the deeper stuff: curiosity, service, parenting, and learning in public. Roman traces his path from riding along on service calls with his dad to getting humbled by his first big VRF job—then running into the fire to master the technology instead of avoiding it. That mindset led him to teaching, factory-level troubleshooting, and community building.   He discusses homeschooling four boys and how nurturing their curiosity reshaped his own teaching style. Roman shares why he makes no-frills videos and answers techs' questions at all hours: if one person benefits, it's worth it. The crew dives into oscilloscopes for diagnosing modern communicating systems, the VRF Tech Talk podcast and Facebook group, and technician-born tools like the EEVmate. Threaded through it all is a simple thesis: chase passion over titles, be okay with failing forward, and find (and become) the helpers.   The episode closes with practical encouragement: stop asking, “What if I fail?” and start asking, “What if I'm amazing at this?” Curiosity compounds; the work finds you; the money follows the value you provide.   EEV Mate products: https://trutechtools.com/eevmate   Roman's podcast, VFR Talk: https://open.spotify.com/show/1zVYrStAhjzRzCn3oEHE6M https://podcasts.apple.com/ie/podcast/vrf-tech-talk/id1796450302 https://www.youtube.com/channel/UCcWMzg9BGLvtXJXDO6Yb2BA   Roman on LinkedIn: https://www.linkedin.com/in/roman-baugh-311b21b3/   The Three Pillars Video #!: https://www.youtube.com/watch?v=nxhqW7quyUs   Kalos Services: https://www.kalosflorida.com/     This episode was recorded in October 2025.  

Join host Badri Patel, P.Eng., Member ASHRAE, along with industry veterans Christopher Williams, Member ASHRAE, and Scott McGinnis, P.E., Member ASHRAE, as they explore the impact of A2L refrigerants, ASHRAE Standard 15 and its implications, the future of VRF technology, and how ASHRAE members can get involved in the conversation surrounding refrigerants. 

The HVAC industry is evolving quickly, from advanced controls to new refrigerant standards, yet one principle remains timeless: skilled technicians are the backbone of the trade. What is changing is how companies are preparing those technicians for long-term careers through focused HVAC training. According to the U.S. Bureau of Labor Statistics, employment in the field is projected to grow 9 percent from 2023 to 2033, with about 42,500 openings each year. This faster-than-average growth underscores the need for clear career pathways, strong retention strategies, and higher service standards.How can HVAC companies design training that develops technical mastery while fostering pride, customer focus, and career growth?In this episode of Straight Outta Crumpton, Greg Crumpton engages with Jeremy Clark, the Training and Development Leader at Carolina Chillers. Clark shares how nearly two decades in the field, from residential service to data center cooling and project sales, shaped his vision for technician development. Clark explains why retention starts with career clarity, how “doing one extra step” elevates customer service, and why adaptability is essential in a rapidly changing industry where HVAC training must keep pace with new technologies.Key Points from the Conversation:Building training programs that pair technical standards with personal career roadmaps to improve retention and engagement.Encouraging technicians to “do one extra step,” small, thoughtful actions that strengthen customer trust and set work apart.Preparing teams for new technologies, from A2L refrigerants to advanced rooftop and VRF systems, through targeted skill-building.Jeremy Clark is the Training and Development Leader at Carolina Chillers, bringing nearly two decades of HVAC experience across residential, geothermal, commercial, industrial, controls, and critical facility environments. His career includes roles as installation and service technician, sales engineer, and building automation specialist, giving him a broad technical foundation and strong customer-focused approach. He is dedicated to developing both new and seasoned technicians through structured training, mentorship, and skill-building that enhances expertise, career growth, and service quality.

In this episode, Tony Mormino chats with Nathan Martin from O'dell HVAC Group in Ontario to explore the Canadian HVAC landscape—from custom VRF-enabled air handlers to electrification, decarbonization, and why Canada's still clinging to the metric system. It's a fun, insightful cross-border conversation packed with real-world strategies, industry trends, and a few laughs about voltage, refrigerants, and the great Fahrenheit vs. Celsius debate.

In this episode of the HVAC School podcast, Bryan Orr sits down with Roman Baugh, a leading VRF (Variable Refrigerant Flow) specialist and co-host of the VRF Tech Talk podcast, for an in-depth exploration of VRF system maintenance. The conversation begins with some lighthearted back-and-forth before shifting to the technical realities of maintaining VRF equipment. Roman immediately addresses a common misconception: the idea that VRF systems are “maintenance free.” He explains that, contrary to some marketing claims, these systems require regular, specialized attention to ensure longevity and reliable performance. Roman shares real-world stories that highlight the consequences of poor installation and lack of serviceability. He describes situations where VRF units are installed in hard-to-reach locations—like cabinets or hard-lid ceilings—making even basic maintenance a costly and invasive process. This lack of foresight often leads to significant expenses for property owners, especially when major repairs require extensive drywall work just to access failed components. Roman emphasizes that proper maintenance starts with ensuring that systems are accessible and serviceable, a step too often neglected during installation. The discussion delves into the specifics of VRF maintenance, moving beyond the basics of filters and drain lines. Roman explains how improper drain line installation can lead to persistent error codes and system shutdowns, particularly when condensate pumps are forced to exceed their design limitations. He goes on to detail the critical role of temperature sensors (thermistors), which are prone to failure from corrosion, moisture, and environmental factors—especially in challenging locations like laundry rooms. These sensor failures can cause misleading error codes and even compressor damage if not addressed promptly. Roman recommends regular sensor checks, especially as components age past their typical five-year lifespan. A significant portion of the episode is dedicated to electronic expansion valves (EEVs), which are susceptible to rust, dried grease, and mechanical binding. Roman advocates for proactive inspection and, when necessary, preemptive replacement of EEVs to prevent catastrophic compressor failures. He introduces tools developed by technicians for technicians, such as the EEV Mate and custom EEV magnets, which allow for manual manipulation and diagnostics of expansion valves in the field. These innovations help HVAC professionals quickly triage and resolve issues, minimizing downtime and protecting expensive system components. The episode wraps up with a strong endorsement for ongoing education, technician communities, and the use of specialized tools and software to ensure VRF systems are maintained to the highest standard. Topics Covered: Debunking the “maintenance-free” VRF myth Access and serviceability challenges in VRF installations Proper drain line design, installation, and common failure points The role and failure modes of temperature sensors (thermistors) Environmental impacts on sensor and component reliability Electronic expansion valve (EEV) maintenance and troubleshooting Field-developed tools for EEV diagnostics (EEV Mate, EEV magnets) The importance of commissioning and using service software Application and installation quality as a foundation for long-term reliability Technician communities, podcasts, and resources for VRF learning and support This episode is essential listening for HVAC professionals seeking to deepen their understanding of VRF systems, avoid common pitfalls, and stay ahead with practical, field-tested maintenance strategies. For more insights, check out Roman Baugh's VRF Tech Talk podcast and YouTube channel for additional resources on VRF technology and troubleshooting.   Check out the VRF Tech Talk podcast on YouTube HERE, or search for it on your favorite podcast app. 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

On this episode of Did You Know? The ESCO HVAC Podcast, Clifton sits down with Mike Hirschbock of Havtech to discuss what's really behind many VRF system failures—and why it often comes down to skipping the basics. From dirty filters and poor brazing practices to misdiagnosed compressor issues, Mike shares real-world examples and teardown insights that reveal how preventable most problems are.They also explore how specialization is changing technician training, the importance of whole-system thinking, and how new tools and AI are reshaping service and diagnostics. Whether you're troubleshooting in the field or training the next generation, this episode offers practical guidance you can use today.

In this episode, Bryan and Roman dive deep into the world of Variable Refrigerant Flow (VRF) systems, focusing on the persistent issue of compressor failures. VRF technology has evolved, and it has seen a major rise in the North American market since the early 2010s. Roman shares his passion for VRF, tracing its origins back to 1982 and explaining how it earned the nickname “chiller killer” by replacing traditional chiller systems in large facilities like hotels, churches, and schools. However, with this rapid adoption came a troubling reputation: VRF systems became notorious for frequent compressor failures, prompting some institutions to revert to older technologies. There are three primary causes of compressor failure in VRF systems: oil lubrication issues, liquid refrigerant return, and electrical failures. VRF compressors are shipped with excess oil to account for the system's extensive piping and multiple indoor units, but improper refrigerant charge—either overcharging or undercharging—can disrupt oil return and lead to gradual compressor death. They emphasize the importance of correct installation, accurate charge calculation, and diligent maintenance. Bryan adds that measuring discharge superheat is a key diagnostic tool: high discharge superheat with normal suction superheat signals poor lubrication and impending failure. The discussion then shifts to the dangers of liquid refrigerant returning to the compressor. Even small amounts can wash oil off the scroll plates, leading to metal-on-metal contact, galling, and eventual mechanical breakdown. Roman details the difference between high-pressure shell and low-pressure shell compressors, noting that VRF systems are more susceptible to operational flood back, which can cause elevated amp draws and catastrophic failure. They also highlight the role of contamination—such as copper shavings or sand from installation—which can damage expansion valves and lead to chronic flood back issues. Maintenance, including regular oil analysis and monitoring of expansion valve performance, is crucial for long-term reliability. Finally, the episode covers electrical failures, often the result of underlying mechanical issues rather than true electrical faults. The hosts advocate for using insulation resistance testing (megohmmeters) as a maintenance tool to track winding degradation over time. They stress that proper cleanup after a compressor failure is vital, recommending temporary filter dryers and oil analysis to mitigate contamination. The conversation closes with practical advice: always investigate the root cause of a compressor failure, communicate findings with clients, and prioritize best practices in installation and service to prevent repeat issues.  Topics Covered in This Episode: The history and rise of VRF technology in North America Why VRF systems earned the nickname “chiller killer” The three primary causes of VRF compressor failure: Oil lubrication issues (overcharge/undercharge, oil return) Liquid refrigerant return (flood back, expansion valve failures) Electrical failures (mechanical causes, insulation degradation) Diagnostic techniques: discharge superheat, suction superheat, amp draw analysis The impact of installation practices and system contamination Maintenance best practices: oil analysis, filter dryers, insulation resistance testing The importance of root cause analysis after compressor failures Resources for ongoing VRF education: VRF Tech Talk podcast, Facebook group, and Roman's YouTube channel   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

Is your HVAC knowledge aligned with today's smart building demands? This episode explores variable refrigerant flow (VRF) systems and their growing role in building automation. As building complexity increases and energy efficiency becomes a priority, VRF systems offer a different approach that requires new skills and understanding from BAS professionals. If you work in building automation, this conversation will help you see where the industry is heading and what it means for your work. Topics covered: Why VRF systems are gaining widespread adoption How VRF components interact to enable precise zone control Challenges with integration and proprietary communication protocols When VRF is the right choice, and when it's not How AI and remote monitoring are shaping the future of HVAC Don't miss this opportunity to sharpen your edge in a changing BAS landscape.

Welcome to the first official “Ask The Experts” edition of Build. Matt answers real questions from builders, architects, and fans of the show. This episode covers a wide range of high-performance building topics that every pro should consider. First, Matt breaks down unvented attic assemblies in LA's dry climate, offering insulation recommendations and best practices for staying code-compliant without overcomplicating the build. Then, he dives into the hot topic of venting dryers in airtight homes—exploring options like heat pump dryers and makeup air systems.Next up, a thoughtful discussion on HVAC design in energy-efficient, all-electric homes, especially when working with contractors who size systems by square footage instead of proper Manual J calculations. Matt shares practical advice for builders working in high desert climates and explains the value of multi-stage and VRF equipment. Finally, he addresses one of the most overlooked but crucial areas of waterproofing: sill pans. From stainless steel to PVC, Matt discusses materials, back dam design, and how to prevent rust or water intrusion under doors.Have a question for Matt (or any of the Build Experts)? Send an email to asktheexperts@buildproductions.com and it might get featured on the next show!Thank you to episode sponsors Mbrico & Pella. Learn more at mbricotiledecks.com & pella.com. Save the Date for Build Show LIVE 2025 in Dallas, TX: October 16-18, 2025!Don't miss a single episode of Build Show content. Sign up for our newsletter.

In this short podcast episode, Roman Baugh takes over the HVAC School podcast to answer a listener-submitted question about VRF (or VRV) system evacuation. Evacuation is a critical step of making repairs on VRF systems, which are very diverse and versatile but require a high level of understanding. VRF systems have multiple indoor units per outdoor unit, and they achieve that with the help of several components and accessories down the refrigerant line that can pose issues in evacuation and pressure testing. In heat recovery units, some manufacturers use solenoid valves (or even electronic expansion valves) in branch selector boxes or branch collector boxes. These valves act as little traffic guards, and the system needs to be put in its refrigerant recovery or vacuuming mode. If not, then you won't be able to evacuate all of the refrigerant and non-condensables from the system. Even if the system passes a decay test, contamination is a major concern when the system starts up and the valves open (due to nitrogen and oxygen mixing with pure refrigerant being put into the system). You can trust and verify that the system is in its proper operating mode at the thermostat to ensure that the valves are open 100% and ready for evacuation or pressure testing. Failure to do so not only poses a contamination risk but likely won't maintain its pressure during the pressure test. Assumption or trust alone is not enough. Heat pumps only have two lines, and the vacuum pulls from both sides of the valve. There's less of an issue because there are no branch selector or collector boxes, but it's still good to ensure that the valves are responding and communicating.    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

Roman Baugh and Donald Falese from VRF Tech Talk podcast takeover the HVAC School booth at AHR EXPO 2025. Join them as they talk about the new VRF products being unveiled, water cooled VRF up's and down's and why VRF is such a difficult trade work in. You will not want to miss this one! Highlights include: Daikin's innovative modular air handler for residential applications Hisense's groundbreaking single-phase VRF system with integrated hot water heating New NFC technology for easier system diagnostics and commissioning Updates on vapor injection technology and inverter developments The emergence of air source heat pump chillers Latest innovations from manufacturers like Gree, TCL, Cooper Hunter and more Whether you're a seasoned VRF technician or just getting started with inverter technology, this discussion covers everything from basic principles to cutting-edge developments in the industry. Roman and Donald break down complex technologies into understandable concepts while sharing their firsthand experience with the latest products at the expo. Don't miss this opportunity to stay up-to-date with the future of HVAC technology!   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

What if you could decide the most efficient HVAC system for a building without spending a lot of money on complex simulations? Join me, Tony Mormino, at the 2025 AHR Expo in Orlando as I introduce the revolutionary "Building Efficiency Systems Tool" (BEST).In this interview, I'm joined by Tony Furst, Senior Systems Engineer at TACO Pumps, for a live demonstration of how BEST enables quick, accurate evaluations of various HVAC systems' efficiency. You'll see firsthand how it handles choices between systems like VRF, chilled water, fan coils, water source heat pumps, and boilers.

This presentation was originally recorded during the LIVE PDH Marathon on December 11, 2024.  It qualifies for PDH credits in the following states: NY, NJ, NC, SC, GA, VA, TN, MD, AL, PA, DE, MS, WV, AR, and many others. If your state is not listed, please consult your local licensing board for eligibility.  To request a PDH certificate, please email tmormino@aircontrolconcepts.com.  “Welcome back! Our final session of the day features Trey Wilder, LEED AP, Sr. Product Support Engineer at LG Electronics USA. Trey will discuss A2L Refrigerants and VRF systems, exploring their role in modern HVAC design.  Live attendees can download their PDH certificate below. For those catching this on YouTube or the podcast, check the description or show notes for all the resources.  Trey's expertise in VRF systems and his in-depth knowledge of A2L refrigerants are sure to provide valuable takeaways.” 

In this episode, Simon Elisha and Brett Looney dive deep into the AWS Transit Gateway, a cloud-scale router that connects VPCs and other networking resources in AWS. They explain how Transit Gateway works, its advantages over VPC peering, and its scalability and resilience. They also touch on concepts like attachments, route tables, and VRF (virtual routing and forwarding). The conversation highlights the benefits of Transit Gateway for both experienced network administrators and newcomers to networking in the cloud. https://aws.amazon.com/transit-gateway

In this episode, we delve into the latest advancements in HVAC technology, focusing on the engineering behind innovative unit ventilators and air handling units. Join us as we discuss the integration of variable speed compressors and VRF controls, which enhance dehumidification and temperature regulation in educational settings. Learn about the technical challenges and solutions in designing HVAC systems that meet and exceed current environmental and energy efficiency standards. Perfect for professionals keen on the technical details that drive HVAC innovation.

OP Labs introduces the Granite Network Upgrade. A vote to deploy Aave V3 on ZKsync Era goes live. Chainlink launches VRF support on Base. And Base releases a USDC resource kit. Read more: https://ethdaily.io/531 Sponsor: Firefly is a one-stop Web3 social aggregator developed by Mask Network. Use one feed to connect with all users across Twitter, Lens, Farcaster, and all Web3 socials. Try it today at firefly.social.

In this special “on the go” episode, we discuss the difference between VRF heat pumps and VRF heat recovery. We explore these two different systems, the pros and cons of each type of system and where to apply heat pump VRF versus heat recovery VRF. This is Tony Mormino, and thank you so much for listening to The Engineers HVAC Podcast.

Rhydon and Dennis start their 3-Part Series of 2023 End of Year Review Specials with a discussion on the highs and lows of sales this year. Joining the two is long time listener and returning guest Zach, who is an in-home comfort specialist as mentioned in his previous appearances on the show. The three went through their wins and losses, this years experiences with homeowners and other stories from the field and wholesale life. #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis sit down for their third Thanksgiving episode since the beginning of the show and discuss the latter's most recent golfing escapades, freezing pipes for service repairs and their upcoming trainings together. Also, they bring on a special holiday guest and announce a Black Friday Deal that is on the way. #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis catch up after two busy and hectic weeks and talk everything from traveling and training to being the extra body in a delivery truck to make sure things get done. They also discuss customers hooking them up with fresh varieties of meat and the latest on Pink Warrior Youth Athlete Ricki Lee and her success on the water.   #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis catch up post their trip to Chicago and have an inspired discussion on many things in the Wholesale process of HVAC. From the Manufacturer to the Manufacturer Representatives and down to the distribution channel that provides everything to the contractor, the R&D duo break down some myths and misconceptions about what life is like on the other side of the field. #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis catch up after a busy two weeks that included Dennis training all over and Rhydon heading to FHP training with Bosch in Florida. The two discuss everything from A2L changes coming for Bosch Water Source to High Efficiency Furnace news and the true difference between competition and collaboration. #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Kelley Cramm, P.E., Life Member ASHRAE, and Drew Champlin, Editor of ASHRAE Journal, discuss the basics of VRF systems and how to keep them from failing. Learn more on installation practices and how engineers and contractors can ensure owners are getting a quality installation.Have any great ideas for the show? Contact the ASHRAE Journal Podcast team at podcast@ashrae.org. Interested in reaching the global HVACR engineering leaders with one program? Contact Greg Martin at 01 678-539-1174

Rhydon and Dennis welcome Kyle Beo of Beo AC and Refrigeration from Baton Rouge, LA. Beo made some bad choices at a young age and his decisions saw him have to face some tough consequences and difficult challenges. However, thankfully he is willing to talk about his past and how it gave him the opportunity to start over in a place where many think their future is hopeless. Through his challenges he found a means to rebuild and start a new chapter in his life in the world of HVAC and now he is paying it forward.    #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis welcome YouTube and social media sensation Jacob Krauss to the show. One of the five Episode 100 Giveaway Winners, Jacob and the guys had previously met briefly at the 2023 AHR Expo in Atlanta. The trio discuss the Koolin with Krauss HVAC story of how he got into and remained in the trades. Additionally they talk about doing HVAC for the love of the challenge and the satisfaction of seeing what you have accomplished in a hard days work. Also make sure to take advantage of Jacob's Troll Clothing discount code: KRAUSS10 on www.trollcoclothing.com! Dirty Hands, Clean Money! #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis enjoy a great episode filled with good times and technical difficulties from the beginning to the end. All the headaches worked to highlight what became the main focus of the show, which morphed into a discussion about the rapid pace of technological advancement hampering the development of person to person communication in the trades and in everyday life. The two conversed about the importance of eye contact, a quality handshake and body language when talking with homeowners and fellow tradespeople. They also discussed some of the short falls that they are both seeing in everyday life in regards to the same thing. They also closed the show with a great "Crawlspace Confession," and a surprise cameo! #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Roman Baugh joins the podcast to talk about oil return and the refrigerant charge in VRV systems. VRV systems—also known as variable refrigerant volume (or variable refrigerant flow/VRF) systems—have one outdoor unit, one or multiple compressors, and multiple indoor units. The outdoor unit modulates to meet the indoor units' fluctuating demands. They are versatile and flexible systems. Like parallel racks, VRV systems have long lines and a lot of piping, so oil return and refrigerant charge are especially critical. VRVs have specific control protocols, as they need refrigerant volume and velocity to move oil and keep it lubricating the compressor for its entire lifespan; oil return mode, the refrigerant charge, and the piping protocols are supposed to support that function.  When it comes to piping protocols, line sizing is critical. Whenever there is a need to relocate the outdoor unit and change the piping configuration, the charge needs to be adjusted, and the piping may even need to be upsized to prevent restrictions from happening. Daikin has VRV WebXpress (and SplitXpress) software for equipment selection; the goal is to help installers out with the line length and charging whenever it needs to be changed.  When trying to get the oil return and line sizing right, you ultimately need to look at the manufacturer's literature and resources. It also helps service technicians if the installer makes the charge and line information readily available to anyone who works on their VRV install in the future. Roman and Bryan also discuss: Where and how oil can settle in VRVs Consequences of improper charge in VRVs Liquid lines in VRVs Violating piping rules and safety protocols Vertical separation in liquid line sizing Suction line sizing POE and PVE oil miscibility Daikin's resources   Check out daikincity.com to find Daikin's literature and software programs. 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.

Rhydon and Dennis welcome another member of the #TradeCrew faithful to the show in Massachusetts Sheet Metal Legend, Caio Torres, known to the HVAC world as SheetMetalHVAC. The guys talk about life in the trades from an immigrant family perspective and how Caio has been forging his own path as a Blue Collar worker proving that Dirty Hands truly does equal Clean Money. We also would like to dedicate this show to his late Grandfather who was a major part of him becoming the hard working man he is today.          #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis have a good old fashioned beer with a buddy discussion as they talk about everything going on in their worlds of HVAC Distribution and personal reality. Looks like it's time for another move for Dennis and another one for Rhydon as well as everyone just seems to be getting all grown up around here. Come crack a cold one with the guys and enjoy some HVAC Family conversation.   #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

Rhydon and Dennis are excited to welcome Rachelle Martins, known in the social world as HVAC_Install_Her on Instagram and TikTok. She and her husband are an install team for Raleigh North Carolina based Air Experts: Raleigh Heating and Air. She is also a proud daughter of the trades as she grew up in a family HVAC business in Massachusetts before coming to the Carolinas. It was a pleasure to spend some time heating about her life and story as a woman in the trades and we hope her candidness and openness help to bring more awareness to the potential for females in this business.     #HVAC #HVACCREW #HVACR #HVACRND #TRADECREW #AC #AIRCONDITIONING #AIRHANDLER #ATTIC #BOILER #BUSINESS #BUSINESSDEVELOPMENT #COIL #COLD #COMBIBOILER #COMEDY #CONSTRUCTION #CONTRACTOR #CRAWLSPACE #DRYBULB #DUCT #DUCTLESS #DUCTWORK #EEV #ELECTRICAL #EPISODE #EQUIPMENT #ERV #FANCOIL #FLEX #FURNACE #GASFURNACE #HEAT #HEATPUMP #HP #HRV #INVERTER #MINISPLIT #MULTIFAMILY #NEWEPISODE #NEWPRODUCT #NEWS #NEWSHOW #PODCAST #PLUMBING #RNC #SHEETMETAL #TANKLESS #TANKLESSWATERHEATER #TECHNICIAN #TECHREP #TRADE #TRADES #TRAINING #TXV #VARIABLESPEED #WATERHEATER #WETBULB    Air balancing, Air conditioning, Air curtains, Air filtration systems, Air handlers, BAS, BMS, Building automation systems, Building energy modeling for HVAC, Business, Business Development, Cased Coils, Coils, Commercial refrigeration, Compressors, Condensers, Consulting, Cooling systems, Cooling tower systems, Dehumidification systems, Duct cleaning, Ductless mini-split systems, Ductwork design, EEV, Electrical, Electronic Expansion Valve, Energy efficiency, Energy efficiency in HVAC, Energy, management software, Energy management systems, Energy-efficient HVAC technologies, Energy-saving tips for HVAC, ERV, Evaporative coils, Evaporative condensers, Evaporative, cooling systems, Evaporators, Geothermal HVAC systems, Green building HVAC solutions, Heat exchangers, Heat load calculation, Heat pump maintenance, Heat pumps, Heat recovery, systems, Heat recovery ventilation, Heat transfer in HVAC, Heating systems, High-efficiency, furnaces, Hot Gas Bypass, Hot Surface Ignition, Hot Water, HRV, HVAC, HVAC airflow, measurement, HVAC controls and thermostats, HVAC industry trends, HVAC installation guide, HVAC maintenance tips, HVAC repair techniques, HVAC retrofitting, HVAC system airflow, balancing, HVAC system automation, HVAC system balancing, HVAC system commissioning, HVAC system components, HVAC system control strategies, HVAC system controls, HVAC, system controls integration, HVAC system design software, HVAC system energy audits, HVAC, system integration, HVAC system life cycle cost analysis, HVAC system noise reduction, HVAC, system optimization, HVAC system preventive maintenance, HVAC system programming, HVAC, system reliability, HVAC system troubleshooting guide, HVAC system upgrades, HVAC, system zoning, HVAC training, Hydronic heating systems, IAQ, IAQ (Indoor Air Quality) testing, IAQ monitoring devices, Indoor air purification, Indoor air quality, Inverter, Inverter Compressor, Inverter Equipment, Load calculation in HVAC, Plumbing, Radiant heating and cooling systems, Refrigerant leak detection, Refrigerant recovery and recycling, Refrigerant types, Refrigeration, Refrigeration cycle, Refrigeration principles, Refrigeration system maintenance, Refrigeration, system retrofits, Refrigeration system troubleshooting, Reheat, Reheat System, Residential Air, Conditioning, Residential Cooling, Residential Equipment, Residential Heating, Residential, HVAC solutions, Residential New Construction, RNC, Smart thermostats, Tankless, Tankless, Water Heater, Territory Manager, Thermal Expansion Valve, Thermal insulation in HVAC, Troubleshooting HVAC, issues, TXV, Variable frequency drives (VFDs), Variable refrigerant flow (VRF), Variable speed, technology in HVAC, VAV (Variable Air Volume) systems, Ventilation systems, Water Heater

HVAC (Heating, Ventilation, and Air Conditioning) is one industry that finds new ways to innovate in the technology era. The advent of new technologies, such as Variable Refrigerant Flow (VRF) and Variable Refrigerant Volume (VRV), are evolving the way spaces are heated and cooled. But what does this mean for those working in the industry, and how are these changes impacting the journey of professionals in the field?In this episode of Straight Outta Crumpton, hosts Greg Crumpton and Gabby Bar delve into these questions, exploring the intersection of technology and HVAC. They're joined by Ruth Gill, an HVAC Engineer at Crystal Air Ltd. Ruth shares her journey into the HVAC industry, her experiences with new technologies like VRF and VRV, and her insights into the industry's future. This conversation sheds light on the evolving landscape of the HVAC industry, providing valuable insights for professionals and enthusiasts alike.

In this live podcast, we quickly look at the six most common types of heat pumps used in the HVAC industry today. Heat pumps are gaining popularity as an alternative to traditional gas heating systems as the world moves towards electrification and away from fossil fuels. YouTube Channel: https://www.youtube.com/InsightPartnersHVACTV The Engineers HVAC Podcast: https://anchor.fm/engineers-hvac-podcast Insight Partners Website: www.insightusa.com Tony Mormino at Insight Partners: tmormino@insightusa.com Connect with Tony on LinkedIn: https://www.linkedin.com/in/tony-mormino View current line card: https://www.insightusa.com/manufacturers Connect to Insight Partners on LinkedIn: https://www.linkedin.com/company/insightusa While heat pumps are not a new technology, first invented in 1856 to dry salt in the Austrian salt marshes, they've come a long way since then. As HVAC professionals, we must stay informed about the different heat pump technologies available today to serve our customers and clients better. Several heat pump technologies are available, each with advantages and disadvantages. Here are some of the most common types: 1. Air-source heat pumps: This heat pump extracts heat from the outdoor air to heat indoor spaces. They are suitable for moderate climates where temperatures don't drop below zero. 2. Water-source heat pumps: These heat pumps extract heat from water sources, such as a lake or river, or more commonly, water cooled in a cooling tower. They are highly efficient and can be used in all climates but require a nearby water source. 3. Heat Pump Chillers: These are conventional centrifugal chillers modified to serve as heat pumps. 4. Heat Pump Water Heaters: Dedicated heat pumps are designed to transfer heat from the ambient air to water. 5. VRF heat pumps: These systems offer many advantages over traditional ducted systems, such as energy efficiency, individual temperature control, and flexible design. However, they also have disadvantages, such as the higher initial cost and increased maintenance expertise requirements. 6. Ground-source heat pumps: Also known as geothermal heat pumps, these systems extract heat from the ground using a series of pipes buried beneath the surface. They are highly efficient and can be used in all climates but are more expensive to install. As an HVAC professional, it's essential to stay informed about the latest trends and advancements in the industry to provide our clients with the best possible solutions.

In this episode, Anna (https://twitter.com/annarrose) explores the concept of Ultrasound Money with Justin Drake (https://twitter.com/drakefjustin) from the Ethereum Foundation (https://ethereum.org/en/foundation/). They kick off with updates on his work in VDFs, MEV and censorship resistance, alongside his particular interests in ZK and how the progress VRFs have made can be applied in Ethereum's POS architecture. They then dive into the original concept of Ultrasound Money and where Justin sees it progressing to in the future, including the current status around issuance. Here are some additional links for this episode: Episode 74: Blockchain 101: Randomness and Random Beacons with Justin Drake (https://zeroknowledge.fm/74-2/) Episode 120: ZKPs in Ethereum with Vitalik Buterin & Justin Drake (https://zeroknowledge.fm/120-2/) Episode 168: Flashbots with Phil Daian and Stephane Gosselin (https://zeroknowledge.fm/168-2/) Zero Knowledge Episodes on zkEVMs (https://zeroknowledge.fm/?s=zk+evm) ZK Whiteboard Sessions: Module Fourteen - Nova Crash Course with Justin Drake (https://zkhack.dev/whiteboard/module-fourteen/) MevWatch.Info (https://www.mevwatch.info/) DeFi Llama (https://defillama.com/) L2BEAT (https://l2beat.com/scaling/tvl/) Ultrasound.Money Website (https://ultrasound.money/) RISC Zero announce the next version of their ZKVM is now available on GitHub at github.com/risc0 (https://github.com/risc0) Today's episode is sponsored by Mina Protocol (https://minaprotocol.com/) The need for private, trustless solutions is clear. A new era of ZK powered decentralized applications is coming – and Mina is the place to build them. Introducing Mina's zkIgnite Cohort 0, where developers complete tutorials and build zero knowledge apps, or zkApps, and get rewarded. There are a quarter-of-a-million MINA tokens up for grabs for zkIgnite Cohort 0 participants. Cohort 0 is finishing soon so head to minaprotocol.com/zkpodcast (https://minaprotocol.com/zkpodcast) to get involved today. If you are tuning in to this podcast later, no worries! Mina will be launching additional zkIgnite Cohorts, just head to minaprotocol.com/zkpodcast (https://minaprotocol.com/zkpodcast) to check out the best way to get involved. If you like what we do: * Find all our links here! @ZeroKnowledge | Linktree (https://linktr.ee/zeroknowledge) * Subscribe to our podcast newsletter (https://zeroknowledge.substack.com) * Follow us on Twitter @zeroknowledgefm (https://twitter.com/zeroknowledgefm) * Join us on Telegram (https://zeroknowledge.fm/telegram) * Catch us on Youtube (https://zeroknowledge.fm/) * Head to the ZK Community Forum (https://community.zeroknowledge.fm/) * Support our Gitcoin Grant (https://zeroknowledge.fm/gitcoin-grant-329-zkp-2)

Bryan has a bit of an industry nerd out with Ross Trethewey from “This Old House” and TE2 Engineering at IBS 2022 (the International Builders' Show). Ross's education and career have focused on mechanical engineering, especially with sustainable solutions. In building science, the key mindset is to think of the building as a system. Using that school of thought, Ross has developed building science and HVAC solutions that also consider indoor air quality and ventilation, such as hybrid VRF systems.  Many of Ross's solutions take the best aspects of air-source and ground-source heat pumps and apply those to hydronics. Some exciting applications for those types of systems could include simultaneous heating and cooling as well as the integration of domestic hot water. Demand control ventilation has been used for a long time in the commercial world, but its possible use in residential applications is another exciting thing to consider. With proper control devices, DCV would give us the opportunity to control temperature, humidity, VOCs, carbon monoxide, carbon dioxide, and radon. In residential applications, DCV has to be a delicate balancing act, as bringing in too much outdoor air would require us to condition that air. High latent loads also present challenges to some of the ventilation solutions in development. Serviceability is another challenge to DCV usage in residential applications; whenever an innovative system is brought to the market, very few people will know how to fix and maintain those systems. One of the possible solutions is to create instruction manuals and give education similar to what already exists for package units. 3D models and animations also help make complicated systems easier to understand. Ross's presence on “This Old House” marks the third generation of Tretheweys on the show. Ross is excited to talk about building science and HVAC innovations and concepts while on the show. Heat pumps are also getting better, especially due to inverter-driven compressors, enhanced vapor injection, advanced control systems, and ECMs. Heat pumps are safer than gas-fired equipment, and we have made them work well in subzero temperatures (because we're nowhere near absolute zero). 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.