The Building Science Podcast

Risk is real in the AEC. True risk management isn't about avoidance, but about informed engagement.Homes and buildings today measure success in many ways, each of these represent a potential failure mode. Managing risk means recognizing and embracing it, this is a core message from our guest today. Joe Basham is a seasoned construction industry attorney with decades of experience, a keen mind, clever wit and the ability to cut to the heart of the matter.Join Kristof and Joe as they delve into the critical role of risk management in the design and construction process and unpack real world ways to navigate challenges with demanding clients, the importance of clear contracts, the power of proactive project management. The discussion also focuses on the impact of new project delivery methods, the rising costs of professional liability insurance and evolving liability concerns in the larger context. Discover how architects are adapting by focusing on design leadership, leveraging consultants, clear contract language and the importance of having open and respectful relationships with all stakeholders. We explore the arriving potential of AI to revolutionize the design profession, offering increased efficiency and informed decision-making - recognizing that this is also a deep change and one that comes with implicit risks and rewards. One final thought is that the ultimate de-risking move is to design thoughtfully, build carefully and maintain open communication and realistic expectations at all times!Joe BashamJoe Basham is Allensworth's Co-Managing Partner. In addition to being responsible for the vision of our firm, he has twenty years' experience in guiding construction industry clients in the preparation, negotiation, and revision of the contracts that govern their work. Contracts are the foundation of any project, and Joe's job is to make sure that foundation is solid. From there, Joe counsels clients in the full range of project-related legal issues, strategies, obligations, and risks that arise from preconstruction to closeout.As a seasoned construction contract attorney, Joe is well versed inthe industry-standard contracts, including AIA, EJCDC, ConsensusDocs and DBIA templates, which he customizes for each specific project. He drafts and negotiates contracts with an emphasis on market-based risk management and practical solutions—all in furtherance of getting the deal closed. Because he represents a broad range of clients, from owners and developers to contractors and design professionals, he understands construction and design contract issues from all angles and is particularly skilled at getting projects underway by getting parties to “yes.”TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

In this special episode of the Building Science Podcast Kristof is joined by Ilka Cassidy of Passive House at NESEA's BuildingEnergy Boston '25.Ilka and Kristof are joined by the following inspiring speakers and organizers of NESEA 25:Jacob Deva Racusin, New Frameworks Natural Design/BuildAndrew Himes, Carbon Leadership ForumLaura Bailey, Vermont Council On Rural DevelopmentHeather Ferrell, Prism Design LabThey dive in to the conferences main take aways, lessons learned, and calls to action.

Understanding climate action through the words we useKeep an ear out for an easter egg after the outro on this one.The words we use matter. Terms like "sustainability”, “net zero” and “resilience” signify our industry's evolving priorities and concerns. These “buzzwords” reflect current cultural circumstances within the AEC industry and larger society while also actively shaping how we approach and address these issues. In this episode will be exploring the meanings and relationships between many of the current buzzwords that are alive in the AEC today. If you've ever wanted to deepen your understanding of words and terms like “sustainability”, “net zero”, “embodied carbon”, “circular economy”, “resilience” or “adaptation” you'll appreciate this interview w/ Kjell Anderson of LMN Architecture in Seattle.Yes, buzzwords come and go. We routinely air quote them somewhat irreverently. But do not be fooled - buzzwords are also important. Far from being superficial, these trends in language mark the emergence, acceptance, and eventual integration of new, often significant, ideas. When a word gains prominence, it often signals a collective reckoning with the issue it represents. Conversely, when it fades, it may indicate that the idea has either been absorbed into the mainstream, superseded by more urgent concerns, or—sometimes quite worryingly—been deprioritized.Dictionary definition of “Buzzword”: (pejorative) A word drawn from or imitative of technical jargon, and often rendered meaningless and fashionable through abuse by non-technical persons in a seeming show of familiarity with the subject.Kjell AndersonKjell is LMN's Director of Sustainable Design and leader of LMN's Green Team, spearheading initiatives into energy modeling, materials + health, and water use reductions. With 24 years of experience, Kjell is well-regarded at local and national levels as a sustainability expert. He is a founding part of Seattle's 2030 Roundtable, an inaugural member of AIA's National Energy Leadership Group, and in other roles in setting practical and innovative directions for the profession. Kjell has contributed to the design of dozens of LEED New Construction projects, plus Pilot projects under USGBC's Neighborhood Development and Commercial Interiors programs, including several Gold and Platinum-certified projects. He is the author of Design Energy Simulation for Architects, published by Routledge in 2014, and has guest taught Arch 533 (Advanced Environmental Systems) at the University of Washington. Kjell earned a Bachelor of Science in Architecture from Washington State University.Some of Kjell's representative projects include the Hyatt Regency Seattle, Seattle Aquarium Ocean Pavilion, and the Eastside Tech Tenant East Campus Modernization and RedWest South project.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

“The world is not made of atoms, the world is made of stories”Muriel Rukeyser“Where do buildings come from?” is a question that comes with a story. Less often asked, “Where do buildings go?”. The evolving story human society tells itself in answer to those questions is worth unpacking thoughtfully. That's what happens in this episode. Join Kristof as he shares a conversation with Greg Esparza on the power of storytelling and the connection between stories and the materiality of buildings. The power of storytelling is clear in the ability to connect people, foster empathy, and transmit knowledge and shape cultural values. The materiality of buildings is itself a response to storytelling. Every building belies the presence of an underlying story about our relationship with nature. At every step of the design and construction process we make decisions. What are those decisions based on? Unfortunately the answer is not often evident and is likely tangled up in outdated ideas based on stories that no longer make sense. The importance of biogenic building materials as an emerging theme in the AEC is not just their materiality, it's deeper. It is the story of us all coming to our senses - both literally and figuratively - our senses of sight (of course), sounds, smells, and textures - while also thinking about where buildings come from and where buildings go. Ultimately the choices we make in how we deliver homes to ourselves impacts our felt sense of life altogether. Why not curate materials for our homes that actually make us feel good? Turns out when we do this we find that these same decisions support the AEC's ultimate triple bottom line of healthy homes, healthy people, healthy planet.Greg EparzaGreg Esparza is a designer and builder with over a decade of experience in custom residential design and construction as a co-founder of Moontower Design Build in Austin, TX. In 2021, Greg immersed himself in designing and building a prototype project called Cross Cabin, a “plant-based” home made of hemp, cork, and cross-laminated timber for himself and his family in Austin. Inspired by this experience. Greg established Cross Cabin Build & Supply to represent and distribute healthy, high-performance, and low-carbon building materials in Texas. Greg has a passion for building with natural, plant-based materials rooted in the commitment of the AIA Architecture & Design Materials Pledge to support health at three scales–human, social, ecosystem–and to prioritize climate impact and circular economy considerations with all material specifications. The Cross Cabin has been featured on the Build Show Network, Dwell+, Passive House Accelerator, The Architect's Newspaper, as well as the 2023 AIA Austin Homes Tour where the most frequent feedback on the home was “I love the smell!”.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

The tension between aesthetics and performance in architecture is a critical and complex issue in contemporary design. Architects are increasingly and appropriately being tasked with designing buildings that are not only beautiful but also functional in terms of impacts on owners, occupants, resources, and planetary ecosystems. The contrasting view, one where architecture is principally form-making comes at its peril. As Juhani Pallasmaa cautions, following this path “The world becomes a hedonistic but meaningless visual journey”Navigating the path between form and function is central to the role of architecture in our society. It is also the backdrop to the daily routine for our guest in this episode. Keith Simon FAIA is both an architect and an enclosure consultant, two roles that move him from one vantage point to the other continually.As Keith says in this interview Architects could be leading many of the changes society needs now but are not. I think we should all look introspectively and ask “Am I prioritizing the right things?”. This episode is both a tribute to the importance of architecture and an appeal to prioritize the lived experience of homes and buildings over the hedonic sculpture on the cover of the glossy magazine. The themes touched on here will ripple out through the AEC for the rest of our careers. It's both important and captivating to reflect on them now. Enjoy!Keith SimonAn expert in building enclosure technology, Keith Simon addresses the critical and often unmet need for ensuring and improving building performance, resilience, and durability by guiding design teams, educating future architects, and facilitating interdisciplinary exchange. Keith is the Vice President of Design Phase Services at Salas O'Brien. He is a Certified Passive House Consultant (CPHC), Legacy LEED AP, Building Enclosure Commissioning Provider (BECxP), and Fellow of the American Institute of Architects (FAIA) with over 20 years' experience in architectural design and building enclosure consultation. His experience includes peer review, design assistance, durability analysis, construction administration, testing, and forensics of building envelope issues. Keith was the founder of the AIA Austin Building Enclosure Council (BEC: Austin) and currently serves as chair for BEC: Austin and board member for the Passive House Institute US (PHIUS) Alliance Austin Chapter. He also serves as the Vice Chair for the National Institute of Building Sciences (NIBS) Building Enclosure Technology and Environment Council (BETEC) executive committee. Keith has been adjunct faculty at the University of Texas School of Architecture since 2011 teaching Environmental Controls, Building Science, Detailing, and Design Studio.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Join Kristof and Corey Squire in this third and final installment of their interview series discussing Corey's book People Planet Design. In Part 1, they opened the discussion at the logical starting place of the important Why questions. Why design matters to society and Why architecture is the place to address so many important issues we face today. Part 2 addressed How to make good design happen by focusing on often overlooked dimensions of the design process. These include company culture, communication and information flow, and the importance of positive incentives.Here in Part 3 is where the rubber meets the road in the form of the What question - What types of systems do we actually design? What do we actually do during the design process? This conversation flows across ten different architectural systems that each correspond to a chapter in Corey's book. The systems covered are (1) Scale; (2) Windows; (3) Air; (4) Roof; (5) Electricity; (6) Structure; (7) Embodied Energy/Carbon; (8) Interior Finishes; (9) User Behavior, and (10) Access/Equity.Corey SquireCorey Squire is an architect and nationally recognized expert in sustainable design. Working as both a sustainability leader within architecture practices and a sustainable design consultant through his firm, Dept. of Sustainability, Squire has empowered multiple award-winning design firms to achieve high-performance projects across their portfolios. He lectures nationally on a range of sustainable design related topics and was a lead author of the AIA Framework for Design Excellence, a resource that's actively redefining excellence in the built environment. Squire is an Associate Principal and Director of Sustainability at Bora Architecture and Interiors in Portland Oregon, where he lives with his Family.Helena Zambrano, IllustratorHelena Zambrano is an architect, licensed in the United States and Mexico, with over a decade of national and international experience. She practices with a passion for environmental systems and is a strong advocate for the use of evidence to inform design. Emphasizing the design of daylit spaces, Helena's work has been recognized with local, national, and international design awards. Her advocacy work includes leading the development of both the COTE Super Spreadsheet and the AIA Common App, two tools that raise the status of sustainability metrics and reframe the way design awards recognize architecture.People, Planet, Design: A Practical Guide to Realizing Architecture's PotentialIf you were asked to close your eyes and envision where you are happiest, would you picture somewhere inside a building? North Americans are inside buildings for more than 90% of the day. Meanwhile, the indoors are stifling us, sometimes even killing us. Buildings, and the materials that make them up, expose us to materials linked to negative health impacts. The construction and operation of buildings is responsible for 40% of climate-changing carbon emissions. In the US, the design choices made by the typical architecture firm employee each year can reduce emissions by about 300 times that of an average American. But the promise of sustainable architecture will not be realized if sustainability remains a secondary consideration for architects. What if great design were defined by its ability to cool the planet, heal communities, enhance ecological functioning, and advance justice?In People, Planet, Design, architect Corey Squire builds the case, provides the data, and lays out the practical tools for a transformative human-centered architecture. This approach integrates beauty and delight with an awareness of how every design choice impacts the community, the planet, and the people who will use the building. Outcome-focused with a deep dive into practical design strategies, the book showcases ten building systems that embody design excellence.Squire centers the idea that by focusing on the desired outcomes—that buildings shelter us from the elements without disconnecting us from the world, that buildings provide the quality of air, light, and views we now know to be essential to health, productivity, and joy—we can move beyond the checklist mentality that has captured much of the design community.Essential reading for architects who want to transform what the profession means, People, Planet, Design pioneers a new vision and sets readers up with clear guidance on implementing it. Only when design prioritizes people, as it should, can architecture realize its full potential.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

What is the future of dehumidification? Turns out this simple question opens up an exciting view of the future of IAQ generally. The goal of a low energy method for removing water molecules from a flowing airstream boils down to some way of identifying, grabbing and holding onto them. Essentially we are talking about a designer desiccant or molecular filter that lets the air pass through while it filters out water molecules. If we can do this, the next logical question is “Why stop there?” Why not identify a broad range of pollutants and contaminants in the airstream and also select and remove them as well? Enter metal molecularly sensitive filtration based on Metal Oxide Framework (MOF) technology. MOFs are a type of advanced material that scientists are developing to tackle a wide range of challenges, from clean energy, to environmental protection via direct air carbon capture (DACC), to health and drug delivery.. While the name may sound complex, the basic idea behind MOFs is relatively simple—they are materials made by combining metal ions (like zinc, iron, or copper) with organic molecules to create a kind of 3D structure that is highly porous, meaning it has lots of tiny holes or cavities - and they operate as a molecular sieve or filter. Join Kristof as he interviews Todd DeMonte of Madison IAQ to unpack the future of dehumidification and learn about desiccants, and the potential for metal oxide frameworks. Along the way we learn whether the “good old” compressor-based dehumidifier is likely to remain the preferred and appropriate approach for many years to come. This is an episode that will bring you up to date at this important edge of the industry. Enjoy!Important Links!Article on MOFs:https://pubs.acs.org/doi/10.1021/jacs.7b04132SMECO Document discussing 3Å wheels:https://www.semcohvac.com/hubfs/Importance_of_3A_Molecular_Sieve.pdf?hsLang=enLithium Chloride Examples:https://www.alfalaval.us/products/heat-transfer/dehumidification/liquid-desiccant-dehumidification/https://temaprocess.com/products/dehumidifier/https://www.ventilex.com/working-principle-drygenic-air-dehumidification/Todd DemonteTodd DeMonte is the Chief Innovation Officer of Madison Indoor Air Quality (MIAQ), a Madison Industries business vertical that holds the following companies: Nortek, Broan-NuTone, StatePoint, NGH, Big Ass Fans, UV-Resources, Therma-Stor, DAS, Addison, Specified Air, Air Xchange, Novel Aire, United Cool Air, Conviron, Argus Controls, and Steril-Aire. As Chief Innovation Officer, Todd identifies and leads the development of innovative new product concepts, markets, and solutions across all MIAQ companies, increasing vitality and driving long-term value creation.Prior, Todd was President and General Manager of Therma-Stor from 2004-2019, where he and his team grew the company's revenue over 600% ($100M+) and created over $250M in enterprise value through innovation in products and markets.Before joining Therma-Stor, Todd was a business owner and worked as a manager and technician in the automotive business for more than 10 years. During that time, he won awards from Mercedes-Benz, Land Rover and for being among the top 15 and top 10 (respectively) technicians in the United States.Todd earned a B.S. in Mechanical Engineering from Cornell University and an M.B.A. from Tulane University. He has been awarded 28 U.S. patents with several more pending.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Passive house has become synonymous with the rapidly arriving new normal for our homes and buildings and offers layers of positive outcomes. Thermal comfort, IAQ/IEQ, durability, and low energy use are typically the incentives for owners, architects, builders and trades. As it turns out, there may be broader societal benefits tied to thoughtfully managing heat flows in and out of a building as well. Good ol' thermodynamics isn't getting the flashy attention of solar PV, wind turbines and batteries, but the demand side may well be where we win this fight to protect ourselves and our planet from the worst, most devastating impacts of the climate crisis.Join Kristof in this wide-ranging conversation with Lisa White, the Co-Executive Director of Phius, where they unpack the positive ripple-out impacts that passive buildings have on our energy grids, and our decarbonization efforts. Seen holistically, buildings are a powerful enabling technology for the ongoing energy transition away from fossil fuels to renewable sources of energy. Starting with a perspective on the current state of the grid and its ongoing evolution, the conversation here positions passive buildings in relation to the decline of the fossil fuel era and the dominance of renewables.Lisa WhiteLisa White is the Co-Director and a technical lead for Phius. Ms. White has been with Phius since 2012. She led the building certification review team for seven years and is an instructor for Certified Passive House Consultant (CPHC®) training and WUFI® Passive energy modeling software training. She holds a degree in Environmental Sustainability with a minor in Architecture from the University of Illinois at Urbana-Champaign, and a Master's in Energy Engineering from the University of Illinois at Chicago.Ms. White has a strong understanding of high-performance building design and how this is integral to the transition to a renewable energy grid. Her Masters' thesis posed the question “What do Net Zero Buildings Cost the Grid?”, combining the concepts behind how building loads are shaped, how design techniques can alter that shape, and how that ultimately impacts the electricity generation resources needed to meet the load – all while considering the shift to more intermittent, renewable energy resources. Ultimately, this research concludes that energy conservation and demand response in buildings is a critical up-front investment to facilitate this transition.At Phius, White works on the development of new and existing professional training courses and has delivered professional training to more than 800 students. She has taught introductory and advanced seminars at professional conferences and universities nationwide, including guest lecturing at the Harvard Extension School. She is a longtime member of Phius' technical committee and was instrumental in the development of the Phius+ 2015 Climate-Specific Passive Building standard, followed by the 2018 and 2021 updates. Alongside standards development and research, White works directly with the Fraunhofer Institute of Building Physics to develop and implement new key features into the WUFI Passive energy modeling software that Phius uses for passive building certification. While in her previous role as Certification Manager, Ms. White reviewed and provided feedback on energy models, drawings, details, planned mechanical systems, etc. to more than 500 project teams working on passive building designs across the world.Ms. White has written and co-authored many publications, the most recent being a cover-featured article in the ASHRAE High Performing Buildings magazine. She has presented at numerous national and international conferences on topics related to grid-friendly buildings, assessing resiliency and passive survivability, measured data for high performance and net zero buildings.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Empowering the practice of architecture to achieve consistent, predictable, positive impacts on human well-being and planetary health is perhaps one of the most pressing topics in the AEC today. Starting with a review of the history of the search for Bioclimatic Law, this conversation with Dr Bill Braham, FAIA is an invitation to architects to reclaim their power. Bioclimatic Law is the relationship between architecture and life. In practice “life” is more narrowly defined by architecture as “comfort” or “comfort, health and well-being”. At its core bioclimatic design asks “What are the climate opportunities?”. The basic principle is to start with a clear understanding of the ambient climate and map those inputs to the design of the building - its massing, orientation, enclosure systems, and window sizes, locations, and shading devices. Beyond these truly passive methods, there are always active systems involved in maintaining a balance between heat flowing into the building and heat sources within the building.Our buildings mediate between the external climate and our lives. From a thermal perspective, actively managing the enclosure can lead to comfortable indoor conditions 60-80% of the time in most climates. From a well being perspective, as the external climate becomes more unpredictable and severe we have an opportunity to improve the quality of the lived experience of the buildings we deliver to ourselves to protect and shelter us. Join Kristof as he and Bill enjoy a thoughtful, wide-ranging discussion about the role of architecture in society and the role of buildings as extensions of our lives and goals. Big picture, we also want to thank you for being listeners who, in our increasingly soundbite world, appreciate the depth, breadth and subtlety of conversations like this. We're happy that you're noticing and valuing that we “go there” in these idea exchanges. Please keep your emails and comments coming.Bill BrahamWilliam Braham, PhD, FAIA is a Professor of Architecture at the University of Pennsylvania, where he previously served as Department Chair and Chair of the Faculty Senate, and is currently Director of the Master of Environmental Building Design and of the Center for Environmental Building + Design. He has worked on energy and architecture for over 35 years as a designer, consultant, researcher, and author of numerous articles and books. His most recent projects include energy and carbon plans for Nakashima Woodworkers and Chautauqua Institution and building performance modelling for Daikin Open Innovation Lab, Silicon Valley.His books include:Architecture and Systems Ecology: Thermodynamic Principles for Environmental Building Design (Routledge, 2016)TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

The work of the AEC is broader than buildings. On a daily basis we, collectively and individually, make decisions that have broad and lasting impacts on our lives, our health, and our world. These impacts can be either positive or negative; the choice is ours. This is the perspective of Gina Ciganik and her brilliant and motivated team at Habitable. Armed with powerful minds and compelling data, they are working to help society rethink material supply chains altogether. Formerly the Healthy Building Network, Habitable exists to help people understand that we need to fundamentally shift the materials economy to protect ourselves and our planet's ecosystems. These are also the people who created the Pharos database. Now they are releasing a powerful tool, The Informed Tool, to make it easy to make good decisions for materials using a simple Green, Yellow, Red system. It's time to start.If the term materials economy is somehow just a bit bland and doesn't connect or feel engaging for you, consider these two facts to remind you of what we're talking about:1. Microplastics in the ocean: 58% of them are from one material - Paint. And 48% is from paint used in homes and buildings. We know latex gloves are plastic but somehow we forget that latex paint is as well. If we are going to ever get the plastics out of our waterways, oceans and bodies, we have to address this material and the upstream decision making process. 2. Carpeting as single use material: 2 Millions Tons of carpeting are thrown into landfills and incinerators in the US every year. Our national obsession with fuzzy floors uses more plastic than all single use plastic bottles, plastic bags, and plastic straws combined (mic drop). OK, did those wake you up and help you understand that the decisions we make here in the AEC have implications and impacts far beyond what we normally consider our purview? Join Kristof and Gina in this lively wide ranging discussion as they unpack the work that Habitable is doing.Gina CiganikGina Ciganik is the CEO of Habitable and has been instrumental in growing and scaling the organization's vision since assuming the role in 2016.Recognized nationally for her leadership in transforming human and environmental health, Gina's strategic partnerships and innovative practices have reshaped housing standards across the affordable housing sector. With a proven track record of creating healthier spaces–including the groundbreaking 90-unit apartment building, The Rose–Gina's leadership drives Habitable's mission forward. She sees herself as a “dot-connector” and translator who amplifies the organization's impact, fostering holistic solutions for planetary health. Determined, curious, and joyful, Gina is committed to creating healthier environments for communities worldwide.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

How can we build better supply chains for the built world? When it comes to the inconceivably vast amount of wood we use in our buildings, one “simple” way is to use less virgin material and use more wood that would otherwise not make it to market. Instead it would be destined to decompose and emit its carbon into the sky. What if, instead, the forgotten trees were salvaged and turned into valuable, usable lumber?This is a big idea whose time has come. Still, having a powerful idea is only the first step. Making it happen in the real world is the other side of the story. Starting with a focus on a smarter, more transparent wood supply chain, the ambitious team at Cambium Carbon are making powerful change happen in the human side of the wood ecosystem in the AEC. Their work is a key support for firms committed to sustainability. Join Kristof in a thoughtful conversation with Ben Christensen to learn more about what Ben and his team are doing to find wood impacted by the four Ds: disease, decay, disaster, and development and keep it out of landfills. Instead of landfills the wood goes back into the built world for generations to come.The company Living Carbon was mentioned during this episode as an interesting website to check out!Ben ChristensenBen, a Forbes 30 Under 30 lister and TedX speaker, is a thought-leader and industry expert. He is the CEO and Co-founder of Cambium, a climate-tech start-up backed by Joe Tsai, Steve Case, and many others. By working with cities to divert wood waste, local manufacturers to create sustainable products, and demand partners for offtake they are creating a new regenerative supply chain for urban wood. Ben loves to share his expertise on topics like circular economies, climate tech, leadership, and building teams. He earned his Masters of Environmental Management from the Yale School of Forestry and Environmental Studies.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Today we're continuing the conversation on modular construction w/ Rommel Sulit and Chris Krager. Buckle up for some quotable quotes and impactful ideas in this episode. A recurring theme from part 1 is present here. Could it be the case that because modular delivery must rethink basic assumptions, it may be the first area of the AEC to do what the rest of the AEC is not. At core, the role of architecture is to create the link between design intent and what is actually built. This is not easy, nor simple. It means managing multiple streams of expertise and action so that they are effectively coordinated and integrated into a finished livable space.Modular requires a high resolution understanding of why we build the way we do, what are its strengths and weaknesses, and, particularly, where are the key leverage points to unlock change. Because as they say in this episode, there's no way around the reality that when it comes to AEC practices, We have to Pivot at somewhere. Modular delivery is perhaps, at heart, a recognition of this truth.Rommel SulitFounding Principal and Chief Operations Officer at Forge Craft Architecture + Design. With 25 years of experience, Rommel founded Forge Craft with Scott Grinder to improve lives through the art and science of architecture and design. Rommel developed his architectural philosophy working on projects that span demographics, geographies and types at the Office of Metropolitan Architecture (OMA) with Rem Koolhaas, Page Southerland Page, Rhode Partners and BOKA Powell. Before Forge Craft, Rommel's work in Europe and across the U.S. centered on ambitious, large scale urban developments. Rommel now oversees projects across Forge Craft's six Architecture + Design Craft Studios including Commercial, Affordable Housing, Interior Architecture, Residential Use, Modular Architecture and Emergent Technologies.Chris KragerChris Krager has a BA in Business Administration from Michigan State University, and he received his March First Professional from the University of Texas at Austin School of Architecture. Krager formed KRDB (Krager & Associates, Design/Build), a develop/design/build company, in 2001 with the intention of creating financially accessible architecture, while focusing on sustainability in the urban environment (www.krdb.com). The firm's projects cover a broad range from single-family developments, small lot projects, mixed-use and multi-family developments, hotels, creative office, alternative senior living models, and more.KRDB's work has been recognized locally and nationally including winning the AIA Austin's prestigious “Firm Achievement Award” in its first year (2001). Their work has appeared in the New York Times, Dwell, Architectural Record, Residential Architect, and Metropolitan Home amongst others. It has been published in numerous books including “Modern Shoestring: Contemporary Architecture on a Budget” by Susanna Sirefman, “Good House/Cheap House” by Kira Oblensky, “The Perfect $100,000 House” by Karrie Jacobs, and two of Sheri Koones' “Pre-Fabulous” books. There work has also been featured on shows such as “This New House”, “Small Space, Big Style”, “Dream Builders”, “Dwell TV” and “What You Get For Your Money”.KRDB's Sol Austin project, a 40 unit model for holistic sustainable design, was one of the first net-zero capable projects in the US, and was awarded an AIA Austin Merit award, the inaugural Austin Green, “Project of the Year” and was featured on the front page of the NY Times Homes section (www.solaustin.com).KRDB introduced ma modular in 2008, their line of affordable modern modular homes and are currently working on projects in Austin, Los Angeles, Dallas and New York(www.mamodular.com). What began as a single-family endeavor, has now grown toinclude projects ranging in scale from a 4 unit small lot development, to a 135 unit, 150k sf project on 6 acres.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

How often do you think about modular construction? Is it an idea whose time has come? There are those who view it as the only path forward that realistically checks all the boxes - are they right? The potential is clear, modular project delivery can save time, save money, and positively impact our current and looming labor and skills crunch on the construction side of the AEC. There is no doubt that relative to the current norm, the “holy triumvirate” of owner, architect builder*, modular delivery represents a disruptive force within the AEC. Modular may be exactly the solutions we need but also one that we are not currently embracing at scale. Why is that? What are the challenges and the opportunities for modular design, construction and delivery? Join us today to unpack those questions and more. Whether you're a seasoned modular developer or just a curious newcomer and novice this podcast has something for you. Kristof is joined by Chris Krager and Rommel Sulit who, collectively have soaked up decades of experience and expertise in the modular space. One of the challenges to understanding modular design and construction is that it is dynamic and evolving. This confluence of financial, technical and material perspectives means different things at different times to different stakeholders. Along with our society and the AEC industry, modular has a path quality, it is not static, by some accounts where we are now is Gen 4 modular. To fulfill its potential modelar delivery needs to reach backward to influence the design process and also to reach forward to construction. This reality, while challenging, is long overdue and it is perhaps the most relevant and powerful benefit. It forces, or at least strongly encourages, the AEC to finally do integrated project design and delivery at scale. *Quote by Rommel in the podcastRommel SulitFounding Principal and Chief Operations Officer at Forge Craft Architecture + Design. With 25 years of experience, Rommel founded Forge Craft with Scott Grinder to improve lives through the art and science of architecture and design. Rommel developed his architectural philosophy working on projects that span demographics, geographies and types at the Office of Metropolitan Architecture (OMA) with Rem Koolhaas, Page Southerland Page, Rhode Partners and BOKA Powell. Before Forge Craft, Rommel's work in Europe and across the U.S. centered on ambitious, large scale urban developments. Rommel now oversees projects across Forge Craft's six Architecture + Design Craft Studios including Commercial, Affordable Housing, Interior Architecture, Residential Use, Modular Architecture and Emergent Technologies.Chris KragerChris Krager has a BA in Business Administration from Michigan State University, and hereceived his MArch First Professional from the University of Texas at Austin School ofArchitecture. Krager formed KRDB (Krager & Associates, Design/Build), a develop/design/buildcompany, in 2001 with the intention of creating financially accessible architecture, whilefocusing on sustainability in the urban environment (www.krdb.com). The firm's projectscover a broad range from single-family developments, small lot projects, mixed-use andmulti-family developments, hotels, creative office, alternative senior living models, andmore.KRDB's work has been recognized locally and nationally including winning the AIAAustin's prestigious “Firm Achievement Award” in its first year (2001). Their work hasappeared in the New York Times, Dwell, Architectural Record, Residential Architect,and Metropolitan Home amongst others. It has been published in numerous booksincluding “Modern Shoestring: Contemporary Architecture on a Budget” by Susanna Sirefman, “Good House/Cheap House” by Kira Oblensky, “The Perfect $100,000 House” by Karrie Jacobs, and two of Sheri Koones' “Pre-Fabulous” books. Their work has also been featured on shows such as “This New House”, “Small Space, Big Style”, “Dream Builders”, “Dwell TV” and “What You Get For Your Money”.KRDB's Sol Austin project, a 40 unit model for holistic sustainable design, was one ofthe first net-zero capable projects in the US, and was awarded an AIA Austin Meritaward, the inaugural Austin Green, “Project of the Year” and was featured on the frontpage of the NY Times Homes section (www.solaustin.com).KRDB introduced ma modular in 2008, their line of affordable modern modular homes and are currently working on projects in Austin, Los Angeles, Dallas and New York(www.mamodular.com). What began as a single-family endeavor, has now grown toinclude projects ranging in scale from a 4 unit small lot development, to a 135 unit, 150k sf project on 6 acres.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Who knew that an indoor pickleball facility could become a touchstone for high performance construction based on passive house principles? The backstory here is worth unpacking as it relates to a powerful force that is not often discussed - money. Return on investment is the aim of the game in the realm of real estate investment and this fact typically filters out high performance passive buildings - but not this time, and it is important to understand why. Our guest today is adept in both the financial and the construction realms and has been able to make a solid case for the value of passive construction in his latest development. Beyond the financial angle, this project aim to showcase high quality construction while also fostering community through sport. Plus with the heat and humidity of the Texas summers playing sports indoors makes it far more accessible to people. Join us in this thought-filled interview with David Komet of Urban Earth to hear about his journey and learn what he's doing with his new pickleball facility as he prioritizes the health of the community, the local environment, and the planet. David KometDavid's professional career began with the Medical Center Guesthouse of America, developing interim stay facilities for patients and their families in major medical centers. From there he went on to be General Manager of Murdock Pharmaceuticals, a division of Nature's Way. His business experiences soon led him to the public capital markets and positions with Prudential Securities and Komet Asset Management managing private pools focused on long/short equity, direct lending and equity real estate investments. His current active projects reflect his deep interest in the sustainability conversation for the built environment, including age in place housing , commercial buildings and controlled environment agriculture.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

At a fundamental level, passive house practitioners are engaged in a rebellion against poor quality design and construction. It's becoming quite clear that this rebellion has legs and will endure. Given this, a question worth unpacking is whether the durability of the passive house movement is emerging as an architectural style. What are the defining principles behind architectural aesthetic decisions in the context of high performance homes and buildings? What will the history books say about our little rebellion in the years to come? Join us in this rich and thoughtful discussion with two powerful voices at the top of their game in the passive house realm.Tessa BradleyTessa is an optimist. She's also tenacious and dedicated to creating designs that are stunning and sustainable at once. She uses her powers for good: in Tessa's vision of the future, architecture is a cohesive part of creating the good life for more people — she believes that excellent design can help make a joyful life. With a tireless enthusiasm for problem-solving and a drive to tackle the toughest challenges head-on, she approaches every project with a blend of spunk, poise, and nerdy, sciencey know-how.Tessa's signature style merges elegant modernism and cutting-edge building science. She's designed some of the most energy-efficient homes in the United States and has been featured in Dwell, The New York Times, The Seattle Times, Sunset Magazine, Design Boom, Houzz, and in books about sustainable design, prefab architecture, and Passive House homes. Graham IrwinGraham is the principal of Essential Habitat Architecture, a Northern California design firm focused on healthy, high performance, sustainable buildings built to Passive Building standards. He has a degree in physics, with additional studies in engineering and architecture, and an extensive background in software development. Since 2008, his firm has worked on numerous single-family, multi-family and commercial Passive House projects throughout California and the US, including the first certified Passive House in California, the first certified Passive House retrofit in the US, and the first certified multi-family Passive House in the US. He is a licensed architect and licensed general contractor in the state of California.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Big news! The Humid Climate Conference is coming back to ATX and it's time for some appropriate FOMO. We're just two weeks out. You will be so glad you made the decision to come to HCC in ATX. Both the technical knowledge and perspectives you'll hear, as well as the realization and experience of the power, vitality and unstoppability of the growing community of folks in the AEC that are stepping up to move our industry and our society forward. The theme for HCC'24 is Transitions. The work we do in the world as architects, developers, builders, trades, and even owners is important and it is also going through a series of transitions that together represent an altogether new way of delivering buildings to clients and communities. The Energy Transition, the refrigerant transition, the transition to lower carbon designs, both embodied and operational, are all “in play” right now. Now is the time to learn about them from visionary thought leaders and boots on the ground who are both showcasing these transitions and helping make them happen. Here's the HCC website and here's the link to buy tickets. Code to get $50 off is shared on the podcast!TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Today's episode opens up the system of systems that delivers the materials, equipment and tools we use to deliver high quality homes and buildings to ourselves. The focus is on an novel ultrasonic leak detection system. This is potentially game-changing technology that impacts the ability to confidently deliver Passive House quality air control layers. Along the way you'll learn about the importance of the air barrier and get a glimpse of the vastness of the AEC. This is an expansive episode that covers the human side of what it will take to get us from high quality designs to high performance finished projects - and ultimately to high quality lived experiences for occupants and owners.If you appreciate the ideas you hear on our podcast, Humid Climate Conference is the conference and the community you're looking for.Bernard HornungHead of Built Environment, Coltraco Ultrasonics Limited a technology firm in the UK.Coltraco is manufacturer of a novel and powerful ultrasonic leak detection system.An example of the types of innovative and trailblazing materials equip and tools that Source2050 is brining to the market. Major Bernard Hornung was educated at Ampleforth College and at The RoyalMilitary Academy Sandhurst. He served 15 years in the Irish Guards, firstly as a Platoon Commander in the Battalion and secondly at the Infantry Junior Leaders Battalion. Bernard is fluent in Spanish and in Portuguese Bernard joined Coltraco Ultrasonics In May of 2020 (a good time to switch career focus to air quality and air barriers) as Head of the Built Environment at Coltraco.John KnappCo-founder of Source2050.Source2050 is the first mission-driven, curated marketplace of energy efficient and highperformance building products that lets builders find and purchase the best solutions for their projects. As you'll hear he's a force of nature who has done a lot, and played a varied of roles during his time on the planet.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

What if it's true that “We can not solve our problems using the same level of thinking that created them”? - Attributed to Albert EinsteinCould it be that our building science understanding is limited? Could it be that even the clarity of understanding we gain by viewing homes and buildings as a systems of systems, assemblies, materials and products interacting according to the laws of science and nature - is necessary but not sufficient to cause us to build that way? Building science is a necessary understanding but it is proving insufficient to cause the change we want at the pace we need. What do we need to add to the building-as-a-system perspective? What will it take to get past Knowing How to get us to Actually Doing what it takes to design and build for the outcomes we need? Using that concept as a lens, this episode seeks to expand the building-as-a-systems view into the society-as-a-system view in order to find ways to allow the power of building science to have proper impact in society. Anyone working in the AEC knows that the barriers to change are solid and weighty. This is what motivates our search for Leverage. Leverage is a force multiplier. Leverage creates a large powerful force using a smaller force. We need leverage to multiply the force we can exert to cause change to happen in the AEC. Following the insights from Donella Meadows(2), we focus on the concept of Leverage Points - those “places within a complex system where a small change in one area can have pervasive positive impacts”. What we will discover is that according to Donella our mental models of the world, our industry, and our role in it - our deeply held, often unexamined, paradigms, are points of power that bring leverage. Please join us for this rich and thoughtful exploration to find sufficiency. What will it actually take to bring the future we want into the present we have. Bring your caring hearts and curious minds and let's have some fun!Reference: Donella Meadows, Thinking in Systems: A PrimerBSPS, SIGN UP PAGE TO GET ON OUR MAILING LIST, WE NEVER SHARE IT. https://positiveenergy.pro/the-building-science-philosophical-societyDONELLA MEADOWS BOOKCHAPTER 6 https://donellameadows.org/wp-content/userfiles/Leverage_Points.pdfWiki on Donella Meadowshttps://en.wikipedia.org/wiki/Donella_MeadowsDonella Meadows Project - Academy for Changehttps://donellameadows.org/Check out the Systems Thinking Resources page!https://donellameadows.org/systems-thinking-resources/Book: Thinking in Systemshttps://donellameadows.org/systems-thinking-book-sale/TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Josh SalingerJoshua Salinger is CEO and Founder of Birdsmouth Design Build, a residential Design Build company located in Portland OR. In 1999 Josh graduated from the University of Wisconsin-Madison with a double major in Zoology and Conservation. In 2007 he started Birdsmouth Design Build with the goal of designing and building beautiful, high performing homes that transform and improve the built environment.Josh has received certifications from Earth Advantage's Sustainable Homes Professional course, and is an early graduate of the Passive House Builders Training program administered by PHIUS and is an accredited EEBA Zero Energy Home Professional. He has been on the board of Passive House Northwest since 2016 and also sits on the Technical committee of Zero Energy Ready Oregon. He is currently developing the curriculum in concert with Earth Advantage for the Sustainable Homes Professional Remote Learning & Accreditation Program. He lives in the Mt. Tabor neighborhood of Portland with his wife and two children and enjoys playing guitar, yoga, cooking, bemoaning the inefficiency of his house, and making the world's best cup of coffee.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Luke LeungLuke is a LEED (Leadership in Energy and Environmental Design) Fellow; He is also a Centennial Fellow from The Pennsylvania State University Architectural Engineering Department; Board of Directors for USGBC (United State Green Building Council), Illinois; Chairman of the ASHRAE (American Society of Heating, Refrigeration and Air Conditioning) Committee on “Tall Buildings”; Chairman of the Building Pressure Committee, Chicago Committee on High Rise Buildings; Sustainable Committee with Council on Tall Buildings and Urban Habitat; Part Time Professor at IIT; Member of the Chicago Sister Cities Program with China; MBA from University of Chicago, MS and BAE from Architectural Engineering at Penn State University.Luke Leung is the Director of the Sustainability Engineering Studio for Skidmore, Owings and Merrill LLP. He is the incoming Chair of ASHRAE Environmental Health Committee; Team leader for ASHRAE Epidemic Task Force, Commercial Buildings; Group Leader for LCA and Embodied Carbon, ASHRAE Decarbonization Task Force; National Renewable Energy Laboratory IN2 Incubator Industry Advisor; BOMA Toronto, Health Committee Co-Chair. His work includes Burj Khalifa, the world's current tallest man-made structure; Multiple times “Excellence in Engineering” award from the American Society of Heating, Refrigeration and Air Conditioning Engineers (ASHRAE); Selected projects also include Pertamina Tower (Net Zero Supertall), General Motors Global Headquarters, XiongAn Net Zero Development, Beijing Finance Street, Embassy of Ottawa in Canada, Embassy in Beijing, Lakeside – 55 million sqft low energy development, a LEED Platinum building with the first large scale horizontal wind turbine in the city of Chicago; etc., and has served as a member of the editorial team for the CTBUH guide Natural Ventilation in High-Rise Office Buildings, ASHRAE “Design Guide for Tall, Supertall, Megatall Building Systems”, among other publications.TeamHosted by Kristof IrwinProduced by M. WalkerEdited by Nico Mignardi

Chris MagwoodChris works with the Embodied Carbon Team in the Carbon Free Buildings Program. He brings focus on carbon-storing material and the residential sector to the team, using his experience with LCA studies and policy development to support the team's work.Chris has been designing and building zero-carbon buildings throughout his 25-year career. From 2005 to 2018, he was a lead instructor in a hands-on design/build program at Endeavour Centre and was responsible for many zero-carbon, zero-toxin, and zero-waste buildings.In 2019, he helped found Builders for Climate Action and codeveloped the BEAM tool for measuring material emissions in residential buildings. He authored four major studies of embodied carbon in new construction for Canadian governments and helped Canadian cities develop an embodied carbon policy.Chris published eight books on green construction, most recently coauthoring Build Beyond Zero: New Ideas for Carbon Smart Architecture (Island Press, 2022) with Bruce King.Jacob RacusinJacob Deva Racusin is co-owner of New Frameworks Natural Building, LLC, offering services in green remodeling, new construction, consultation, and education featuring natural building technologies. Through their work as a builder, consultant, and educator, Jacob is able to merge their passions for fine craft, ecological stewardship, relationship to place, and social justice. Their goal in this work is to create a meaningful impact on the built environment in developing healthy, resilient communities. Deva is an instructor at the Yestermorrow Design/Build School, where they are the former director of the Natural Building Intensive Program. A BPI-certified contractor and Certified Passive House Consultant, Jacob has conducted field research on moisture and thermal performance of straw bale wall systems, which is featured in the book The Natural Building Companion which they co-authored with Ace McArleton (Chelsea Green Publishing, 2012). They have lectured and presented at universities, conferences, and other events across the Northeast. Jacob lives with their family in Montgomery, VT, in a straw bale house on their permaculture-inspired homestead.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

How do we design and build affordable net-zero, carbon-negative homes? That important goal is the subject of today's episode and is the focus of a multidisciplinary team that includes PNNL, WSU and Green Canopy NODE. On the podcast today you'll hear from Patti Gunderson with PNNL who is working with a talented team who are taking a thoughtful approach to this ambitious goal. One that focuses on modular design, carbon sequestering materials, thermal/energy efficiency, and a forward-looking circular approach that relies on cleverly designed, factory-built, bio-based materials right from the start. The outcome is a home that supports an owner's right to repair (we need this with so many so-called durable products in our world today) and also allows the materials in the home to be disassembled and reused and the end of the home's lifecycle.Patricia GundersonPatti Gunderson joined PNNL in 2021 and supports several projects in both the Energy Policy and Economics and Buildings and Connected Systems Divisions. A particular strength is collaborating with manufacturers, designers, builders, and trades people to understand and overcome barriers to adoption of optimized building technologies.Patti most recently spent nearly six years at Home Innovation Research Labs where she proposed, designed, and led research projects to study constructability, functionality, energy efficiency and durability of buildings. Her background in building physics, engineering software tools, systems design, discipline coordination, project documentation, and construction administration provides valuable insight for research, analysis and client support.Prior to HI, Patti worked in the DC office of SmithGroup, an international AE firm, on numerous high-profile projects including embassies, medical centers, university law schools and the flagship Net Zero Brock Environmental Center for the Chesapeake Bay Foundation. Patti is a big fan of collaboration and has benefitted from research partners and clients representing several national labs, the National Association of Home Builders, the Leading Builders of America, and numerous international manufacturers, as well as staff from DOE, FPL, HUD, and VA.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

You don't have to be a building nerd or an engineer for a question like this to be relevant and important to consider. There are many reasons why AWHP systems make an attractive alternative to our batch of current “normal” heat pumps that rely on refrigerant for thermal distribution. Some of the reasons AWHP are appealing include: (1) reduced refrigerant volumes, thus reduced refrigerant leakage into the atmosphere; (2) larger selection of indoor unit options relative to refrigerant based systems; (3) the ability to support comfort via thermally active surfaces (aka radiant heating/cooling); (4) your home is better future-proofed and more technology-agnostic, and (5) these systems affordably unlock thermal storage (for thermal loads), which can provide energy resilience for their owners as well as dispatchable grid-level energy storage This episode is why you listen to the Building Science Podcast, somehow this multifaceted emerging story has still not hit the mainstream.

We spend the vast majority of our time inside yet we actually know very little about what it means to live indoors. This is the case even though what happens indoors impacts us in nearly every way. Our comfort, health and overall well-being all are deeply impacted by what's in the air we breathe and what's happening in and on the surfaces all around us. Enter Corbett and Grace Lunsford. Knowing that what we don't know about our homes matters a lot, they took on the challenge of creating a TV show on home performance for mainstream audiences. Their show, now in it's third season makes it clear that a “good home” is far more than what it looks like and how much it will sell for in the market. In the process, Corbett and Grace have become leading voices in the role of educating us about the many and hidden dimensions of home performance. Join us in this episode as they unpack the why, the what, and they created the Home Diagnosis TV show on PBS.Corbett LunsfordCorbett began working in the realm of home performance expertise in 2008 with Grace. He quickly discovered the challenges within the construction industry—its inherent messiness, time constraints on professionals, and inadequate compensation, all of which adversely affect homeowners throughout their lives. Their shared objective is clear: to present building performance in an accessible manner for both professionals and consumers, contributing to the improvement of structures globally.In 2009, Corbett initiated the Building Performance Workshop. He has also been prolific in sharing knowledge through more than 500 YouTube videos, 80 interviews for the Building Performance Podcast, and the authorship of the book "Home Performance Diagnostics: the Guide to Advanced Testing." Additionally, he developed the APT Reports software tool.Not bound by conventional expectations, Corbett and Grace designed and constructed the world's highest performance tiny house on wheels, the #TinyLab, in 2016. They toured the U.S. and settled in Atlanta, Georgia, creating the groundbreaking TV series "Home Diagnosis," the first of its kind on public television across the U.S.Grace LunsfordGrace Lunsford is the powerhouse behind The Building Performance Workshop's videos and the Home Diagnosis TV series. She started the 'Home Performance' YouTube channel, and has produced over 500 videos to date, gaining 4 million views and 23k subscribers. Grace is the creator, co-host, and Executive Producer of 'Home Diagnosis', the first-ever TV series about measured home performance, which has aired on over 60% of the PBS stations across the U.S. Her short films and feature film, The Other One, have won awards at film festivals, and as a Hewlett-Packard sponsored artist, she presented workshops on her work methods at both Sundance and Cannes.She founded the media firm Sterling Rock Productions because the media she wanted to see was not being made. She has served on the Boards of Directors of the Screen Actors Guild Midwest and the Illinois Production Alliance (which lobbies for tax incentives in the film industry), where she spearheaded an initiative to bring the production of major motion pictures and television shows to Chicago. She also founded the 501c3 Chicago Acting in Film Meetup, a professional support group of over 150 screen actors.Grace's career in film and television and voiceover continues in Atlanta, GA, where she's represented by Stewart Talent.TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Moving heat with a heat pump is an unsung superhero in the global energy transition. Chances are nearly 100% that you're using a heat pump right now - to heat or cool yourself, refrigerate your food, or keep your car comfortable while you drive. The vapor compression process may be the thermodynamic engine of a heat pump, but where the rubber meets the road is the heat exchanger, aka “the coil”. Getting heat exchanger coils right is a balancing act. On one hand we want the coils wall material to be as thin as possible so they move heat efficiently, on the other hand we don't want the working fluid, typically a high GWP refrigerant, to leak out into the sky. This is a costly hassle for us as well as a tragic outcome for the atmosphere. This is the backdrop for today's conversation with Todd DeMonte on coils, coil failures, and the future of refrigerant based heat ex. Todd has been one of many smart folks around the world working to help society move past the vexing issue of formicary corrosion. Enjoy the feast of ideas in this episode!

As a society we are learning, slowly but surely, how to design and build healthy indoor spaces for ourselves and our loved ones. Seeing the need to both guide and accelerate this learning process, Paula Baker LaPorte and her wingman John Banta and Erica Elliot MD dedicated themselves to write a book. This happened 35 years ago with the 1st Edition of Prescriptions for a Healthy Homes, last year (in 2022) the 4th Edition was published and it is a richly updated treasure trove of motivation, guidance and actionable information that we all need to know more about. What we need now is a step change of sorts in the way society thinks about and delivers housing to itself. We need a Healthy Home Revolution.With that in mind, Kristof sat down with Paula to have a conversation about her journey exploring and understanding the connection between the built environment and our health. After hearing her stories and absorbing the understanding and knowledge in her book, it is clear that homes can be so much more than we currently ask them to be. Homes are more than a visual-spatial-economic situation, more than a place to hold ourselves, our families and our stuff, more than an exercise in energy efficiency and resource use; The places we live are in truth highly immersive and tactile experiences for our bodies and minds, and profoundly impactful opportunities to promote our health and the health of the planet.

Designing and building a sustainable passive house is a powerful moment for all involved - the client, the architect, and the planet. For the owners the process is deeply personal and emotional, with layers of financial impacts and the significant time investment involved. For architects the key is to talk in a way that clients can hear them, and listen in a way that they can hear their clients*. For both the architect and the client the first few conversations set the stage for what comes next. Join us in this interview with Graham Irwin of Essential Habitat where we unpack the seemingly simple question: How does effective communication between the client and the architect happen? The answers may surprise you. “Designing a home is an incredible opportunity, let's ensure the results are extraordinary”-Graham Irwin, Essential Habitat*with respect and appreciation to the amazing parenting book

Stated another way: Why is it that some firms produce a consistent stream of high-performing buildings, while others have trouble crafting a single project that moves beyond traditional practice? The answer is Practice; the environment and practices within which each particular firm carries out or exercises its professional role in the society. Join us in this episode as Corey and Kristof enjoy a thoughtful and lively discussion of architectural practice along the dimensions of Vision, Culture, Process and Knowledge. This is one for all of you out there that recognize the power of architecture and want to better understand how to unleash its positive impact into the world.

Topics include the basics of particulate capture, the tradeoffs between filtration efficiency, clean air delivery rate, and energy use, filter media types, and electret degradation. If you want to learn about the role of filtration in delivering clean indoor air for your self, or if your role in society has agency in making sure your clients are breathing healthy air, you will appreciate what you learn here. Mark is a filter nerd with the ability to break things down and communicate clearly.

Topics include the basics of particulate capture, the tradeoffs between filtration efficiency, clean air delivery rate, and energy use, filter media types, and electret degradation. If you want to learn about the role of filtration in delivering clean indoor air for your self, or if your role in society has agency in making sure your clients are breathing healthy air, you will appreciate what you learn here. Mark is a filter nerd with the ability to break things down and communicate clearly.

The 2020's have so far been a decade of abundance and progress for society's awareness and understanding of Indoor Air Quality (IAQ). Beyond and before the pandemic put IAQ on everyone's mind, researchers have been enjoying well funded support from various organizations, both public and private, to better understand the impacts of indoor air on our health and well being. Plus cutting edge technologies from novel mass spectrometers to real-time PCR and next-generation DNA sequencing are both expanding and accelerating our understanding of the richness, diversity and significance of indoor air quality in our lives. Join us for this engaging and somewhat nerdy discussion with Dr Pawel Misztal, an assistant professor from the University of Texas at Austin's Civil Architectural and Environmental Engineering department. In this conversation Pawel unpacks the story of indoor air emissions and their impact on us. The emissions come from many sources including what we do, who we are (our bodies are highly active emission sources), and the microbes that live on every surface indoors.———-TeamHosted by Kristof IrwinProduced by M. WalkerEdited by Nico Mignardi

There are few roles in society with the broad and lasting power of Architecture. Architecture both reflects and directs the story of a civilization and its cultural milieu by signaling what's important, who has value, and how society functions. Recognition of the power of architecture in society sets the stage for today's discussion with Corey Squire, a skilled sustainability consultant, a member of the AIA's COTE Advisory Group, and an architectural optimist if there ever was one. Join us in this episode as Corey and Kristof start to digest the feast of ideas in Corey's new book that will be coming out in the Fall of 2023.Corey's book People, Planet, Design is somewhat of a “How To” response to Carl Elephante's declaration that “Architects don't need to seek relevance, only seize it” (1). As you'll hear in this episode, in Corey's view, seizing relevance happens by bringing about a new vision of design excellence. A vision that heals the schism between architecture and the goals and concerns of society. This happens first by shifting the mindset about the purpose of architecture, and then practically recognizing architecture at a crossroads and moving in a direction. One that unlocks the power of architecture, the promise it holds, and needs to hold, in the future that's arriving now.

In a Seattle neighborhood, close to public transportation, Dan Whitmore and his associates are putting the money where their ideals are and making affordable housing happen. Not just affordable but high-performance Passive House affordable per the Phius standards, plus they have an onsite PV array that unlocks the benefits of onsite power generation. This episode is an interview with Dan as he unpacks the topic and asks Why is this compelling social issue considered to be only one that can be addressed by governmental programs and non-profits? The need for affordable housing is indeed a compelling societal issue with wide-ranging impacts. In many cities in the US the cost of housing is rising faster than incomes and there is a growing racial homeownership gap. The lack of housing creates a lot burden, pain and turmoil in, and can have lasting impacts on people's lives, particularly children. On the flip side, studies have shown that investing in affordable housing can have a significant positive economic multiplier effect. So why is there not more affordable housing happening in the US? Perhaps the answer lies in investors taking this question seriously.__________Dan WhitmoreDan Whitmore has worked in the construction industry since 1987 as a carpenter, general contractor, builder, and consultant with additional stints as a designer and FEMA Inspector.His introduction to high-performance building came at an impressionable age when, in 1977, his family built an award-winning Solar Home in Oklahoma where he grew up. As designer, builder, and Certified Passive House Consultant (CPHC®), he completed one of the first passive houses in Washington State in 2010. Since then, he has consulted on and/or built more than 20 passive house projects.He now divides his time between Indicator, his new energy, durability, and constructability consulting firm, and Cascade Built, a builder/developer of sustainable multifamily projects in Seattle. Whitmore is also an Instructor at Phius, co-developer of the Phius Certified Builder Training program, Council Chair of the Phius Alliance, and a founding board member of Passive House Northwest.___________TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Today we are going to dig into The Future of Homes with two home builders intent on delivering that future in the present. How do we make truly healthy, exceptionally durable homes that also respect the environment, the new normal? What are we doing in residential construction today that we'll look back on and say “Remember when we used to do that?” Conversely, what are we doing that is “new” and unconventional today but will come to be a widespread, mainstream practice? These are the opening topics in this thoughtful conversation about the importance of perspective and the role of the builder-client relationship. A core theme is whether the constraints to achieving powerfully positive outcomes are more related to materials and technologies, or perspective and process. The discussion here on all these topic and more is broad and deep. Join Kristof for an interview with Kevin Rosa and Paul Coppock of Opus Vitae Construction out of Portland, Oregon. ______Kevin RosaHe constantly seeks out the best process and the latest and most in-depth scientific construction knowledge, Kevin is Passive House certified, and refers to himself as a “building science nerd”.Paul CoppockHis favorite aspects of the job are problem-solving and the uniqueness of each project. He relishes the opportunity to build lasting relationships with clients and subcontractors.______TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

Why is the AEC industry still mostly ignoring hempcrete? There are a host of good reasons to use this renewable and low environmental impact material in homes and buildings - including indoor air quality, acoustics, thermal comfort, and energy performance - yet the mainstream market is still largely uninformed and continues to deliver today's houses with yesterday's material palettes. With industrial hemp coming online fueled by new legislation, favorable economics and strong market potential - amid a conventional building material supply supply chain beset by disruptions and price increases - deciding to use hempcrete for your build may be just a matter of time. Join us in this episode as we unpack the basics and benefits of hempcrete and beyond. Aside from hemp as an amazing multi-use crop, and hempcrete as a product, there are the unsung innovators and pathfinders in the AEC world who rarely get the attention and appreciation they deserve. In this episode we keep true to our tagline and bring the human factor to architecture design* in the form of the incomparable heart and mind of Tim White. Tim has long been a man with a passion for healthy sustainable homes. A passion that over time has become a mission to build with hempcrete.*Quiz question: Where have you heard that phrase before?______Tim is the president and owner of Texas Healthy Homes. He is an experienced builder and product designer, with a passion for sustainability and human health. He has built over 50 natural homes in the last 20 years across the United States and the Caribbean. As a clay and lime expert, Tim has developed proprietary technology for both plaster and masonry blocks independently and as a product designer for American Clay. He loves to educate and has led workshops on historic masonry, lime plasters, clay plasters, straw bale construction and LSC. Prior to becoming a natural builder, Tim played college football, served in the Marine Corps and guided Class 5 river rafting trips in southern Colorado.______TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

The best place to generate electrical power is where it's used. We all know that solar PV adds value for both owners and society by improving resilience, reducing energy costs and decreasing carbon emissions and climate impact. Yet traditional design practices and compressed schedules make it challenging for project teams to include integrated solar on their designs. The solution is Architectural Solar and the Architectural Solar Association knows that the key moves are early engagement and integration of architectural, structural and cladding systems. The time is now to consider solar as being architecturally significant and to realize that it does not always have to be relegated to the roof. The days of the Mr Potato HeadTM approach, where panels are stuck onto a home or building after they're built, are over. Join us for forward-looking discussion with two industry experts in best practices for solar integration and design._____Stan PipkinSince 2007, Stan has co-managed and owned Lighthouse Solar in Austin, TX. He has been involved in the shaping of local and state policy to foster the growth of solar energy. In addition, Stan runs an architectural design practice, Pipkinc., focusing on residential, commercial and civic projects. He has found considerable overlap between integrated solar design and holistic architectural design services. In 2000 he co-founded a research and design collective, Spurse, which has engaged in community design projects, material research and process consulting for institutions and organizations ranging from the Guggenheim Museum to The Land Institute. Their work has included exhibitions, workshops, lectures, participatory community design projects, product development and architectural design. Lecture and workshop venues have included MIT, Rhode Island School of Design, Maine College of Art and the GuggenheimWhile managing and growing all aspects of Lighthouse Solar, Stan worked closely with a number of industry innovators, including Lumos Solar on the development of its architectural solar product suite. Stan holds a Master of Architecture from the University of Texas, his skill-set sits at the nexus of solar energy and architecture._____Christopher KlingaChris is a licensed, professional structural engineer, with 10-years of hands-on experience in the architectural solar industry. He has an extensive background in solar installation design and operations and architectural solar product development. In addition to his efforts with ASA, Chris operates his own solar product development firm SolMotiv Design, which consults directly with the full value chain of both PV and curtain wall industries. Chris is also a co-inventor on 3 solar technology patents and 3 pending patents. Chris holds a B.S. in Mechanical Engineering from the University of Colorado in Boulder._____TeamHosted by Kristof IrwinEdited by Nico MignardiProduced by M. Walker

There has never been a better time or opportunity to completely rethink the way we approach the practice of architecture and construction. With climate change looming over us, becoming more visible by the day, a critical look at the materials we use and their impacts on emissions is needed. Enter natural building materials. Which ones are legit? How can we use them? Join Kristof as he interviews architect and builder, Greg Esparza, with a sweeping introduction to mass timber construction, as well as other natural building materials like cork insulation, hemp insulation, wood fiber board insulation, etc. ———-Greg EsparzaGreg is a co-founder of Moontower Design & Build ​and the founder of Cross Cabin Build & Supply. He received his Bachelors of Science in Architecture, University of Texas at Austin and has been in the design and construction industry for over 15 years. Greg prides himself on developing deep relationships with his many interesting clients and delivering fantastic outcomes on their projects. Greg is a fierce advocate for natural building materials and has spoken at building science conferences across the country, including The Humid Climate Conference. ————Cross Cabin Build & SupplyCross Cabin Build + Supply promotes climate-friendly homebuilding in and around their hometown of Austin, Texas. They do this through distributing low carbon, renewable, plant-based building products and providing technical support during design and construction of climate-friendly homes. Cross Cabin specializes in mass timber projects and foam-free, vapor-open homes that prioritize a safe work environment for craftspeople, a healthy home for families, and a careful consideration of the climate impact of how building materials are made and how these materials can be recycled, reused, or naturally biodegraded in the future.______TeamHosted & Produced by Kristof IrwinEdited by Nico MignardiEngineered & Produced by M. Walker

We live in the information age. The quality of the information we receive determines the quality of our decisions and the effectiveness of our actions. It is also no secret that money holds influence, and the methods through which we obtain information, as well as the economic dynamics of the building science and construction industry, are undergoing constant change.We invite you to join us in exploring the significance of Building Science Journalism in today's world. Our conversation features two accomplished, knowledgeable, and profound authors who have dedicated themselves to this field: Brian Pontililo and Aaron Fagan. Along the way, we will delve into the evolving role of bloggers and social media influencers within the AEC industry. We will also acknowledge the fact that manufacturers now possess multiple avenues to convey their public relations and marketing messages to their target audiences.Throughout our discussion, we will highlight the value of journalism, storytelling, and the adherence to journalistic standards, such as fact-checking. We encourage you to participate in this captivating dialogue and, perhaps, gain a fresh perspective that will enable you to engage more meaningfully with your favorite building science and construction channels.———-Brian PontililoBrian Pontolilo has spent the better part of the last 20 years as a journalist, writer, and editor covering residential design and construction at Fine Homebuilding magazine and GreenBuildingAdvisor.com. Brian has a degree in professional writing, worked for a short time at local newspapers, and has worked in landscape construction, as a painter, and as a carpenter before coming to the Taunton Press, and during the three breaks he has taken from office life. On his current hiatus from full-time employment, Brian is designing and building what he hopes will be a pretty good house in northwest Connecticut.Aaron FaganFormer associate editor for Fine Homebuilding, Aaron has written and edited for a disparate list of publications, including The Economist, Penthouse, and Scientific American. He has also worked as a welder in a window factory, as a screw-machine operator, and as a remodel/repair carpenter. Educated at Hampshire College and Syracuse University, Aaron is the author of three poetry collections: Garage, Echo Train, and A Better Place is Hard to Find.

You're in for a feast of ideas here. Join us as Kristof talks with Bruce King about his work as a stubborn optimist and powerful motive force in the realm of low carbon buildings. Bruce joins a wise heart with a clever mind and a deep understanding of the technical aspects and implications of the role of energy and carbon in how we, as a society, deliver buildings to ourselves. Today's interview discusses themes from Bruce's new-at-the-time book Build Beyond Zero written along with friend and co-conspirator, Chris Magwood, and a host of superstars in the low carbon buildings space, to remind us that the very buildings we live and work in are currently poised to be “one of the most practical and affordable climate solutions instead of leading drivers of climate change.” We all have power and agency in the future of buildings and it benefits us to listen to folks like Bruce King to show us the way and motivate us to move forward. ____Bruce KingBruce King is the founder of the Ecological Building Network (EBNet), and a registered engineer with 35 years of worldwide experience in structural engineering and construction. He is the author of Buildings of Earth and Straw, Making Better Concrete, Design of Straw Bale Buildings, ASTM International E-2392, earthen building guidelines, and dozens of papers and articles for conferences and journals. He has organized three international conferences on ecological building, and is the founder of BuildWell Source, a user-based collection of low-carbon materials knowledge, and of the BuildWell Symposia. www.bruce-king.com www.ecobuildnetwork.org____About Bruce's BooksBuild Beyond ZeroAuthors Bruce King and Chris Magwood re-envision buildings as one of the most practical and affordable climate solutions instead of leading drivers of climate change. Build Beyond Zero provides a snapshot of a beginning and map towards a carbon-smart built environment that acts as a CO2 filter. Professional engineers, designers, and developers are invited to imaging the very real potential for our built environment to be a site of net carbon storage, a massive drawdown pool that could help to heal our climate. And if you have not yet read, or recently re-read his first book, please feel encouraged to do so!New Carbon ArchitectureImagine a building made of sky. For the first time in history, we can build pretty much anything out of carbon that we coaxed from the air. We can structure any architectural style with wood, we can insulate with straw and mushrooms, we can make concrete - better concrete - with clay, microbes, smoke, and a careful look in the rear view mirror and the microscope.All of these emerging technologies - and more - arrive in tandem with the growing understanding that the so-called embodied carbon of building materials matters a great deal more than anyone thought in the fight to halt and reverse climate change.The built environment can switch from being a problem to a solution - much nicer places to occupy that just happen to pull carbon out of the air.____TeamHosted & Produced by Kristof IrwinEngineered & Edited by Nico MignardiProduced by M. Walker

Producer's note: after a regrettably long COVID-19 disruption, this fun bonus short episode (recorded live in 2018) finally gets to see the light of dayAre you open to rethinking how you provide lighting to your home? What if there were a lighting system that not only saves you time, money and energy, but also enhances your experience of the living space?I think we all already know that running 120V AC around a home to power DC LEDs leads to a lot of warm AC-to-DC transformers and wasted energy. We also know that Solar runs on DC and batteries store DC power, so why do we still use AC for lighting (besides the fact that it's traditional)? Enter direct DC lighting for homes – an approach that brings efficiency, safety, and versatility to illuminate your surroundings. With its low-voltage wiring, energy-saving direct DC to LED connection, and smart control systems, DC lighting offers a host of possibilities and benefits including:Simplifying lighting installationReducing the use and associated costs of copper wiringProviding flicker-free dimming in true white or tunable colorsSupplying backup lighting during outagesImproving the owner/end-user experience. Join us for this short interview with Murray Freeman, a pioneer and stubborn optimist in the DC Lighting space. We will learn the basics and leave you with an informed perspective on the fascinating realm of direct DC-to-LED lighting, where modern technology, sustainable living, and high quality owner/user experience converge.Murray FreemanMurray has deployed Power over Ethernet in over 3,000 buildings. Creative engineer, he has striven to design systems for better reliability, durability, and self diagnosing while achieving cost efficiency. With experience in residential construction, he realized that neither PoE nor 120 VAC are suitable for lighting in new home construction - therefore, a new standard low voltage method to light LEDs was invented. His lighting solutions equips new homes and small business with smart switches and tunable white extended lifespan LEDs. He founded ATX-LED to design and manufacture energy efficient smart lighting systems. His goal is to bring high feature and higher quality lighting solutions to new construction, changing forever how light is wired.Hosted & Produced by Kristof IrwinEdited by Nico MignardiEngineered & Produced by M. Walker

Is a building more like a river or a rock? A building seems to just sit there*, so in that sense it seems to be more like a rock. But in reality every building material, and thus the entire building itself, is a snapshot in time of a river of resources and energy flowing from natural ecosystems into our use, and then, ultimately flowing back into the environmentAll along the way, this flow of energy and resources emits carbon and other molecules into the sky, changing atmospheric chemistry and imbalancing our climate's equilibrium. We've long known that this is both happening and that it's a problem. What's different now is that human society is waking up to the fact that we must work together to chart a new course forward. A course that recognizes the importance of reducing the both operational and embodied, or upfront, carbon emissions. That's where our guest today comes in. Andrew Himes is all about helping groups move society forward by focusing on the convergence of technology, communication and social activism. Join us for this fast paced and compelling interview with Andrew as we talk about the theory of change for industry transformation using data & tools, policy change, and collective action. *From a building science perspective, we know that a building's enclosure seems static and solid but is actually constantly and dynamically mediating the flows of heat, light, sound, vibration, odor, microbes, allergens, water and air (mass) between the interior and exterior conditions.Links & ResourcesCarbon Leadership ForumMEP 2040Andrew's TEDx Seattle Talk : Save our buildings, Save our PlanetTeamHosted & Produced by Kristof IrwinEngineered & Edited by Nico MignardiProduced by M. Walker

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

Knowing how to build fantastic high performing buildings is not enough; we need to cause that to actually happen. We need high performance buildings to exist. Knowing how is necessary, but also clearly not sufficient. During this time of increasing urgency to realize new performance outcomes, we need new skills in order to fulfill our roles in society as architects, engineers, builders and trades. What this means is that we need to think about what actually works and then do a lot of that right now. In this episode we interview a veteran Passive House architect who has thought deeply about this topic of “What do we do differently that will cause owners to make better decisions?” In our rational, fact-filled world, we may be leaving some powerful tools on the table. Tools that recognize that we are far more than rational decision-making computers; we are humans and as such we are powerfully influenced by relationships and by emotions. Join Kristof as he interviews Graham Irwin, AIA, CPHC and the rich discussion that follows.

Join Kristof as he interviews architect and Passive House nerd, Trey Farmer, in a wide ranging discussion about remodeling his personal residence. The ambitious project was an endeavor to prove to the Austin architecture and construction community that beautiful, well designed single family passive houses were not only possible in the market, but also quite practical and able to be built without breaking the bank or special products. Trey's emphasis on community and his own business endeavors all point to a deep prioritization of doing better and leading by example. This episode is awesome and we can't wait for you to hear it. About TreyTrey Farmer, AIA received his M.Arch from The University of Texas at Austin and has 15 years of experience in sustainable design and construction. He came to Austin from New Hampshire via New Zealand and Northern California where he worked and studied English, architecture, permaculture and natural building. He is a LEED AP (BD+C) and a Certified Passive House Consultant (CPHC) as well as a certified permaculture designer and teacher. Trey is on the Austin Passive House Alliance Board and the national Passive House Alliance Council. He spends his free time with his wife, son and fur-child on the greenbelt, in their garden or in their certified Passive House home.Press & Media About Theresa Passive HousePHIUS project profileAIA Austin design awards profileMatt Risinger video about the HVAC systemMitsubishi video about the HVAC systemMatt Risinger video about the insulation levelsGreen Builder article about the house in the deep freezeTexas Architect Magazine featurePassive House Buildings feature article (on page 58)

Happy New Year! Welcome back to the 8th season of our little show. We can hardly believe it. In this episode, we ask the question “what is it actually like to run a business that focuses on building science?” Turns out, we know something about that. Join Kristof and Miguel in a discussion about the challenges, joys, and future of business model innovation as building scientists and entrepreneurs. You can learn more about our Performance Consulting and Residential MEP services on our company website. Be on the lookout for great new episodes in the coming weeks (we're stacked with interview appointments at the moment and it's exciting).

The famous astronomer and educator Carl Sagan once said, “If you wish to make an apple pie from scratch you must first invent the universe.” What Sagan was pointing at is the fact that for us to really do anything from scratch, we have to understand the system in which we exist.The planet and all its inhabitants exists as a massive, complex system of interconnected systems that we don't always see. For example, the COVID-19 pandemic has clearly shown us that public health is part of a global web, inextricably linked. On a smaller scale, the materials and energy that we use to build and operate our homes and cities rely on these natural interconnected ecosystems. Effortlessly spanning scales from the level of the planet, a vast forest or a single home, the science of Systems Ecology provides a powerful perspective and valuable set of tools that can inform skillful design and construction practices for homes, buildings and cities.How do natural ecosystems provide us with all that we need for our lives, homes and cities? What are the basic ingredients that are “cooked” in this recipe? Join Kristof as he interviews Miaomiao Hou and Dr. Bill Braham for a fast and furious dive into the infinite complexity of emergy. You'll never be able to un-hear this. We will unpack some of the terms and concepts needed to unlock this powerful, versatile, quantitative way to understand what matters most when it comes to resources and energy, and why. Along the way we will learn about energy that remembers where it comes from and the layers of transformations it goes through along the way to us, so we can make better decisions on how to use it wisely. For complete show notes, please visit the episode's webpage.

Do we really need dehumidifiers when we've got VRF units? How do dehumidifiers work? Why do we need dehumidifiers now when we've never had them before? These are valid questions that deserve scientific answers and we're here to dig in. Join Kristof as he interviews David Treleven and Nikki Krueger of Madison Industries (makers of dehumidifiers, ERVs, and many other innovative indoor air quality products).

One of the most uncomfortable topics for anybody to wade through is the nearly ubiquitous and constant exposures to hazardous chemicals and compounds which we all encounter in daily products. The construction industry is no different - many building products are chock full of chemicals that are known health hazards to humans. As the body of scientific knowledge about these chemicals and their health impacts grows, it's important that professionals and consumers have a sufficient understanding of their presence and purpose. Join Kristof as he interviews Dr. Tom Bruton, Senior Hazardous Substances Engineer at California Department of Toxic Substances Control and formerly a Senior Scientist at the Green Science Policy Institute, on a class of chemicals called PFAS, which are present in many common building materials and making their way into our bodies through a variety of exposures that are easy to forget in day-to-day life._________Dr. Bruton is a Senior Hazardous Substances Engineer at California Department of Toxic Substances Control. He works at the interface of science, business, and government to promote healthier products and a healthier environment. Trained as an environmental engineer and environmental chemist, Tom's experience ranges from contaminated site remediation to chemicals management in supply chains to regulatory policy, with particular expertise on per- and polyfluoroalkyl substances (PFAS)._________Dr. Bruton is a Senior Hazardous Substances Engineer at California Department of Toxic Substances Control. He works at the interface of science, business, and government to promote healthier products and a healthier environment. Trained as an environmental engineer and environmental chemist, Tom's experience ranges from contaminated site remediation to chemicals management in supply chains to regulatory policy, with particular expertise on per- and polyfluoroalkyl substances (PFAS)._________PFAS Per- and polyfluoroalkyl substances (PFAS) are a class of highly fluorinated synthetic chemicals notable for their non-stick, waterproof, and grease resistant properties and also for their extreme environmental persistence. Building materials are a high-volume use of PFAS that have received relatively little attention. PFAS have many uses in the building industry, including in roofing materials, flooring, paints and coatings, sealants, glass, and more. Annual sales of PFAS-containing building materials are more than $26 billion._________Green Science Policy InstituteThe Green Science Policy Institute was founded in 2008 in Berkeley, California, by Executive Director Arlene Blum after she learned that the same chlorinated tris flame retardant that her research had helped remove from children's pajamas in the 1970s was back in furniture and baby products. Since its founding, Green Science Policy Institute's scientific research and policy work has contributed to preventing the use of “Six Classes” of harmful chemicals in consumer products and building materials worldwide.

The world of indoor air quality monitoring can feel like the Wild West and it's high time we sort it out. Join Kristof as he interviews Stanton Wong, President of RESET Standard, about the landscape of sensor technology, accuracy, data reliability, how SARS2 moves around public spaces, and a range of other indoor air quality topics. You may be surprised by how deep this field of applied science can go.

Industrial hemp is poised to proliferate across many verticals in the construction materials marketplace. It’s a raw material with an unfortunately politicized history and so many potential applications it’ll make your head spin. Join Kristof and Miguel in conversation with Mattie Mead and Henry Valles as we explore the many intersections of industrial hemp and the built environment.

Valentines Day 2021 began a hellacious week for Texans as not one, but multiple critical infrastructure grids failed amidst prolonged record low temps. Join Kristof as he interviews Dr. Joshua Rhodes and Dr. Charles Upshaw, of IdeaSmiths (and of Positive Energy if you don't mind the bragging). In this episode we discuss what happened in Texas, separating myth from fact and understanding the role of buildings in the equation.