Best Mitchell Weaver Podcasts (2025)

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EP246 Beyond MERV: The Truth About Smoke, Sensors, and Standards With Sissi Liu (October 2025) 39:29

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4d ago39:29

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Episode quotes: "Below about 0.4 microns, many low-cost PM sensors are basically guessing—right where wildfire smoke and aerosols live." — Sissi Liu "Electrostatic filters can look great at first—and then fall off a cliff in smoke. Pressure drop won't warn you." — Sissi Liu "Science is a way of thinking much more than it is a body of knowledge." — …

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Roxane Gay (2024) - How to Have Dangerous Ideas 1:00:53

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Drawing from her experience as an author and cultural critic who consistently challenges predictable opinions, Roxane Gay urges us to embrace the danger and discomfort of dissent. But in an age of polarised opinion warfare, this comes at a personal and professional cost. Courage is an essential ingredient in this strategy, but it can only take you …

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The Anatomy of Evil (2024) - Stan Grant & Simon Longstaff 1:02:24

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Humanity has demonstrated, time and again, a horrific tendency to destroy its own kind – often to eliminate difference and impose uniformity of identity. At its worst, this tendency has led to the destruction of whole peoples – the crime against humanity of genocide. However, in our politically charged climate, the term genocide carries a massive m…

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John N. Friedman (2024) - The Fading Dream 28:30

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Economist John N. Friedman has made a career researching the causes of inequality and its long-term consequences for children in the US. His findings are grim. Social mobility is in sharp decline. Where you live and go to school increasingly determines your success and future. Friedman explores how policy can harness schools, neighbourhoods, univer…

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Todd Fernando (2024) - The Next Frontier 41:47

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The concept of success and excellence is fraught with tension between communities within Australia. For non-Indigenous Australians, excellence is almost exclusively an economic concept, founded on stolen and inherited resources and privilege. While for Indigenous people, aspiring to this definition of excellence can involve assimilation and the aba…

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EP245 Retrofit the Future: Inside PHIUS's New Revive Standard with Al Mitchell and Haley Harlow (October 2025) 38:38

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Eric Kaiser sits down with Haley Harlow and Al Mitchell from PHIUS (Passive House Institute US) to explore Revive 2024, a groundbreaking new retrofit standard focused on thermal resilience and healthier, safer existing buildings. Haley shares her path from Pennsylvania College of Technology to her current role managing building certifications at PH…

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EP244 Envelope, HVAC, and Humans: Solving the IAQ Puzzle with Brantley May (October 2025) 29:28

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Quotes by Brantley: "Most moisture problems are a three-way dance—envelope, mechanicals, and the occupants." "Skim the light, don't blast it. The right flashlight technique makes the invisible visible." "If you only understand one piece of the system, you're solving 1/3 of the problem." Indoor environmental specialist Brantley May joins the show to…

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EP243 Three Sensors, One Strategy: Making Maintenance Truly Smart With Kevin Weaver from SmartAC (October 2025) 35:07

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Episode Quotes from Kevin Weaver: "If we can quantify delivered capacity on the air side, we can work our way back to what's happening on the refrigerant side." "We don't have to diagnose everything remotely — we have to be great at saying, 'there's a problem,' and prioritizing action." "Even the best design can be wrecked at installation. Executio…

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EP242 Give Every Heat Pump a Cell Phone - Predictive HVAC with Thalo Labs With Brendan Hermalyn (October 2025) 34:38

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QUOTES from the Episode "Instead of landlines everywhere, give every heat pump a cell phone and let it call home." "We're seeing close to 40% of heat pumps undercharged or leaking—no wonder callbacks are high." "What gets measured gets managed." — often attributed to Peter Drucker (fitting this data-driven shift) Brendan Hermalyn (CEO/founder, Thal…

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EP241 Hydronics, Storage, and a Single Box: Berlin Raj's Totex Vision (September 2025) 37:26

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Totex co-founder Berlin Raj joins Eric and "Overkill Bill" to unpack a single-box, hydronic monoblock system that combines space conditioning, domestic hot water, pool heating, thermal + lithium storage, EV charging integration, and backup power. Born from Berlin's lifelong tinkering (and many shocks), the idea: stop wasting condenser heat—capture …

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EP240 Run Into the Fire: Curiosity, VRF, and the Rise of Roman Baugh (October 2025) 48:54

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Quotes from the Episode: "If it helps one person, then it's worth its weight in gold." —Roman "Stop asking 'What if I fail?'—ask 'What if I'm amazing at this?'" —Roman "I ran into the fire and rescued my future self." —Roman (riffing with Bill) Roman Baugh—third-generation tradesman, educator at Kalos Services, and prolific HVAC content creator—joi…

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EP239 Psychrometrics, Mobile Apps, and the Future of HVAC with Carmel Software (September 2025) 32:06

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Stephen Roth—founder of Carmel Software and current owner of Hands Down Software—joins Bill and Eric to trace a multigenerational journey from a 1920s Ohio roofing firm to modern HVAC software that powers everyday field work. Stephen shares how family roots in commercial roofing and energy management shaped his path as a mechanical engineer and cod…

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EP238 From Talk to Proposal: NOSO's Take on Ethical, Measured Sales With Winston Chi (September 2025) 37:52

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"Use AI to augment people, not replace them." "Windshield time is 30% of a tech's day—let's turn it into sales prep." "Proposals should translate specs into homeowner value—comfort, savings, and choices." In this episode, recorded live from the NCI Summit 2025 in Round Rock, TX, Bill and Eric sit down with Winston Chi, co-founder of NOSO Labs, to e…

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EP237 From Data to Decisions: Tools, Demos, and Takeaways from NCI With ELK and Bill (September 2025) 33:58

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Some quotes: "When we treat the house as the biggest duct, comfort and performance finally line up." "Field data becomes financial data the moment a homeowner decides—so it has to be right." "If you can't measure it, you can't improve it." — often attributed to Lord Kelvin Fresh back from the early-September NCI Summit in Austin, Bill and Eric reca…

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EP236 Details Matter, but So Does the Big Picture A Conversation with Lisa White of PHIUS (August 2025) 44:15

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In this episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn welcome Lisa White, Associate Director of PHIUS, to explore the evolving world of passive building. Lisa shares her journey into building science, her role at PHIUS, and how the organization has grown from a niche movement into a force shaping multifamily and affordabl…

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EP235 Counter-Culture, Catharsis, and Craft: Nathan Orr on Kalos, Blue Rabbit, and Beyond (August 2025) 34:49

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In this episode of the Building HVAC Science Podcast, Eric and Bill welcome Nathan Orr, Sales Director at Kalos and co-founder of Blue Rabbit. Nathan is candid, reflective, and unfiltered, sharing how his creative process—whether through writing late-night reflections or even experimenting with unconventional podcast settings—helps him process emot…

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EP234 Heat Transfer and Heart: What 40 Years in HVAC Can Teach Us All With Mike Uselof (July 2025) 34:51

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In this episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn welcome longtime HVAC instructor Michael Uselof, who shares his remarkable journey from answering a humble job ad in 1983 to becoming a passionate educator with the United Association (UA). Michael reflects on the value of learning through hands-on experience, the evol…

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EP233 Thermal Cameras, AI, and Comfort: HomeBoost's Big Idea with Selina Tobaccowala (July 2025) 37:34

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On this episode of the Building HVAC Science Podcast, Bill Spohn and Eric Kaiser are joined by seasoned tech entrepreneur Selina Tobaccowala, founder of HomeBoost.com, to discuss a new consumer-driven solution that brings energy comfort diagnostics into the modern era. Selina, whose background includes co-founding Evite and serving as President/CTO…

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EP232 Dry Air Done Right: The Art and Science of Dehumidification With Nikki Krueger (July 2025) 44:02

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In this engaging episode of the Building HVAC Science Podcast, Eric Kaiser chats with Nikki Krueger, National Sales Manager and building science advocate at Santa Fe (a Thermastor brand), often dubbed the "Queen of Dehumidification." They explore the science and application of dedicated dehumidification in homes and buildings across various climate…

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EP231 Reimagining HVAC Sales: How Eden Is Modernizing the Home Upgrade Journey with Josh Koplin (July 2025) 37:40

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In this episode of Building HVAC Science, Bill Spohn welcomes Josh Koplin, co-founder of Eden (https://e-denhomes.com), to talk about how digital tools are reshaping the HVAC sales experience. Josh shares his unique journey from building power plants in Japan—where he was immersed in a heat pump-centric culture—to co-founding Eden, a company aimed …

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EP230 Beyond Smoke and CO: The Case for Natural Gas Alarms with Marc A. Adams (July 2025) 51:31

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"Incidents drive policy. Policy drives law." – Marc A. Adams "You don't want to do the Scooby-Doo dance if you smell gas—evacuate and call 911." – Marc A. Adams "An electronic nose is a better solution than relying on your own." – Bill Spohn In this compelling episode of the Building HVAC Science Podcast, Bill Spohn and Eric Kaiser speak with Marc …

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Saree Makdisi (2024) - Tolerance is a Wasteland 45:09

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For some, the image of Israel, as a shining example of liberal democratic ideals has been broken by the Netanyahu Government's actions in Gaza since 7 October, 2023. Yet, for others, the positive image projected by Israel has always been a convenient myth, allowing dominant powers within the international community to turn a blind eye to decades of…

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David Baddiel (2024) - The God Desire 1:14:27

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Is God a story we've just told ourselves to satisfy our own desires? Comedian and author David Baddiel knows God doesn't exist, but wishes he did. As Baddiel wrestles with his understanding of God and spirituality as a Jewish atheist, his bold thesis uncovers how religion services the deepest needs of humanity. This session is in conversation with …

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Coleman Hughes & Josh Szeps (2024) - A Colourblind Society 59:14

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Are we too focused on race? Have recent anti-racist movements like Black Lives Matter abandoned the 'colourblind' spirit of the original civil rights movement? In this live FODI edition of Uncomfortable Conversations with Josh Szeps, writer and podcaster Coleman Hughes articulates his vision for a future where individuals are judged by 'the content…

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Jen Gunter (2024) - Lifting the Curse 34:34

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Being open about the female body has always been taboo, risky and dangerous. So, by smashing ancient menstrual taboos, and demolishing dangerous pseudoscience, the Internet's OB-GYN Jen Gunter has long been on a mission to destigmatise the myths and misogyny surrounding women's health. Gunter urges women to seize control, reminding them that it sho…

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EP229 Smart Sensors, Healthy Patients: The Future of Healthcare IAQ with Renee Jacobs (July 2025) 30:48

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"IAQ is no longer just a maintenance issue—it's a strategic lever for improving patient outcomes and financial performance in healthcare." "Saving a single dollar in energy for a hospital is like generating twenty dollars in patient revenue." "The big message: it's not as big a lift as it used to be. Smart IAQ solutions are now turnkey and data-dri…

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EP228 GRIT Camps: Where Trades Meet Transformation with Leilani Orr and Ty Branaman (July 2025) 53:50

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In this episode of the Building HVAC Science Podcast, hosts Bill Spohn and Eric Kaiser sit down with two passionate leaders from the GRIT Foundation—Executive Director Leilani Orr and Head of Training Ty Branaman. Together, they unpack the origin story, purpose, and transformative impact of GRIT Camps, which introduce youth to the skilled trades in…

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EP227 From Toolbelt to Trainer: Adam Mufich's HVAC Journey (June 2025) 34:16

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In this wide-ranging episode, Eric Kaiser and Bill Spohn welcome longtime HVAC pro and educator Adam Mufich to the podcast. Adam shares his unique path through the industry—from growing up in a third-generation HVAC family and starting his own company, to becoming a trainer at the National Comfort Institute (NCI). The trio dives into how social med…

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EP226 Three Miracles and a Heat Pump: Fixing Retrofit Policy from the Ground Up with Abhi Katamneni & Nate Adams (June 2025) 57:09

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In this insightful episode, Bill and Eric are joined by Abhi Katamneni from Efficiency Canada and Nate Adams, also known as the House Whisperer, for a wide-ranging conversation on the future of home performance, policy, and how HVAC contractors can play a central role in the electrification and decarbonization of housing. Abhi shares lessons from h…

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EP225 Beyond the Image: Lessons in Humility and Heat Transfer with Matt Schwoegler (June 2025) 35:21

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In this engaging and insightful episode of the Building HVAC Science podcast, Eric Kaiser and Bill Spohn welcome Matt Schwoegler, founder of Blaze Infrared and longtime thermography educator. Matt shares his unexpected journey into the world of infrared—from a marketing career in the ski industry to teaching thousands about heat transfer and therma…

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EP224 Beyond Vapor Compression: Smarter DOAS with Liquid Desiccants with Phil Farese (June 2025) 40:36

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In this in-depth episode of Building HVAC Science, hosts Bill Spohn and Eric Kaiser sit down with Phil Farese, CEO of Mojave HVAC, to explore the cutting edge of desiccant dehumidification technology. Phil, whose career began in physics at Cornell and research at Princeton before moving into consulting at McKinsey and leadership roles at NREL, Enph…

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EP223 AI Without the Hype: Real-World Automation with Tersh Blissett (June 2025) 40:21

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In this high-energy episode of Building HVAC Science, Bill Spohn and Eric Kaiser welcome Tersh Blissett—entrepreneur, podcaster, and automation enthusiast—for a deep dive into how AI and automation are transforming service businesses. Tersh, known for running multiple HVAC, plumbing, and electrical companies, shares his journey from podcasting begi…

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EP222 Airflow, Action, and Ideas: Brent Davidson's Mission to Elevate Heat Pump Pros (June 2025) 33:19

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In this episode of Building HVAC Science, Bill Spohn and Eric Kaiser welcome back Brent Davidson, founder of the U.S. Heat Pump Summit, for an energizing discussion that soars from glider flights to the frontlines of heat pump education and adoption. Brent shares the story behind launching the Summit—from a hunch inspired by his solar-industry back…

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EP221 Consultative Selling Meets Smart Software in Home Performance with Amanda Godward (May 2025) 33:51

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"Proposals don't save energy… action does." — Bill Spohn "I didn't know how cool this thing was until we started sharing it with the world." — Amanda Godward "Change is hard—but that's what makes it great." — Amanda quoting Ross Trethewey from This Old House In this episode of Building HVAC Science, hosts Bill Spohn and Eric Kaiser welcome Amanda G…

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EP220 Just Keep Learning: The HVAC Journey of Dirk Nauman (May 2025) 37:44

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"The process doesn't fail. The technician fails to follow the process." – Dirk Nauman In this inspiring episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn are joined by Dirk Nauman—HVAC trainer, simulator inventor, and founder of Visual 3D Academy. Dirk shares his personal transformation from a nervous first-time trainer to an…

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EP219 Thermentor: Rethinking Load Calcs with Real Energy Data with Max Reichlin (May 2025) 31:41

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"We're not guessing what's inside the walls—we're measuring how homes really use energy." Max Reichlin In this episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn sit down with Max Reichlin from Clean Power Research to explore a groundbreaking HVAC tool: Thermentor. Designed to bridge the gap between estimated and actual reside…

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EP218 Breaking Down Silos: The Path to Better Retrofit Training with Ben Hildebrandt (May 2025) 49:01

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In this episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn welcome Ben Hildebrandt, a passionate advocate for building science and green technology education at the Southern Alberta Institute of Technology (SAIT). Ben shares his winding career path—from automotive mechanics to aircraft maintenance to architectural technology—a…

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The Pitchforks are Coming (2024) - Myra Hamilton, Carl Rhodes & Jordan van den Berg 1:00:24

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Ordinary citizens are starting to realise that their dwindling share of our common wealth is no accident, but the inevitable result of the current system. As life becomes more precarious, has the time come when the 'discontented majority' will flex their muscles and seize, by whatever means, a fairer share of the economic and social pie? Or will th…

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Speaking Bluntly (2024) - Antoinette Lattouf, Andy Mills & Josh Szeps 1:03:13

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Journalists play a vital role in a democracy, holding power to account. The traditional model of journalism sees journalists as disinterested seekers of the truth, striving for 'objectivity' and suppressing their own opinions. But as newsrooms and editorial pages previously staffed only by white male journalists have evolved, and as the internet ha…

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David Runciman (2024) - Votes for 6 year olds 45:40

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When it comes our most divisive political, economic and social issues there is a fracture between the views of the old and the young. As older generations continue to monopolise wealth and how policy is shaped, younger generations are becoming more and more disenfranchised. The inequality and anger between generations is growing, and it might just …

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Counterfeit People (2024) - Lizzie O'Shea, Patrick Stokes & Emily van der Nagel 1:01:03

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The late philosopher and scientist, Daniel Dennett talked about 'counterfeit people' as one of the great dangers of AI – but are we now willing to court the same dangers through our adoption of multiple identities across the metaverse. Moving from the confinement of physical reality to the landscape of the metaverse, where looks, preferences, and g…

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EP217 Where Building Science Meets HVAC: Insights from New Orleans (April 2025) 21:40

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In this episode of Building HVAC Science, Eric Kaiser and Bill Spohn are joined by a special guest who's carrying on the Spohn legacy—Billy Spohn. The trio recaps their experience at the 2025 National Home Performance Conference in New Orleans, the largest in the event's history, with over 2,800 attendees. They reflect on the continued convergence …

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EP216 Built to Last: How JB Industries Keeps It Made in America (April 2025) 40:12

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In this episode of Building HVAC Science, hosts Bill Spohn and Eric Kaiser sit down with Jeff Cherif and David Madden from JB Industries, a long-standing, U.S.-based HVAC tool manufacturer with deep roots in Aurora, Illinois. Jeff shares his fascinating journey from Motorola executive in Dubai to co-owner of JB Industries, sparked by a chance rooft…

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EP215 Mindset, Metrics & Mastery: Anthony Woo's HVAC Game Plan (March 2025) 40:47

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"How much pain they have cost us, the evils which never happened." —Thomas Jefferson In this episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn sit down with Anthony Woo, an HVAC contractor from Quebec, Canada. Anthony shares his journey from dropping out of college to becoming a successful business owner specializing in heat …

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EP214 Why Small HVAC Companies Get Stuck—and How WorkHero Helps Them Grow with Furman Haynes (March 2025) 34:21

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"You can be high quality and effective, but also efficient at the same time." — Furman Haynes, Founder of WorkHero In this episode of the Building HVAC Science Podcast, Eric Kaiser and Bill Spohn sit down with Furman Haynes, co-founder of WorkHero, to explore a critical challenge facing small HVAC business owners: the administrative burden that sti…

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EP213 Revolutionizing HVAC: How Pearl Edison Bridges Homeowners and Contractors with Jake Yurek (February 2025) 30:23

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In this episode of the Building HVAC Science Podcast, Bill Spohn and Eric Kaiser interview Jake Yurek, the co-founder of Pearl Edison, a platform designed to simplify the installation of energy-efficient systems for homeowners and contractors. Jake shares the origins of the company's name, inspired by Thomas Edison's first power station on Pearl St…

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EP212 Home Comfort Demystified: A Deep Dive with Eric George (February 2025) 33:47

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In this episode of Building HVAC Science, Bill Spohn and Eric Kaiser sit down with Eric George, founder of Home Comfort Advisor, to discuss his journey from insulation and energy audits to content creation and education. Eric shares how his background in home performance shaped his passion for providing homeowners and tradespeople with reliable, sc…

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EP211 Data Integrity in HVAC: Why It Matters More Than You Think with Rachel Kaiser (February 2025) 41:15

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In this episode of Building HVAC Science, Bill and Eric welcome Rachel Kaiser to discuss an often-overlooked yet critical topic: data integrity in HVAC and building performance. Rachel, who has a background in scientific research and data quality, shares insights into how the HVAC industry generates and manages data, why data integrity matters, and…

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EP210 Building Better: Why HVAC and Construction Must Work Together with Sophie Ashley (February 2025) 33:48

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In this episode of Building HVAC Science, hosts Bill Spohn and Eric Kaiser welcome Sophie Ashley of Energy Vanguard, an HVAC designer with a background in carpentry and building science. Sophie shares her journey from hands-on construction work to HVAC design, emphasizing the critical integration of mechanical systems and building structures. She d…

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EP209 From Safety to Sustainability: Navigating the A2L Revolution with Keith Gifford (January 2025) 43:06

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In this episode of the Building HVAC Science podcast, host Eric Kaiser is joined by Keith Gifford, Senior Global Product Manager at Penn Controls, for an in-depth discussion about the emerging use of A2L refrigerants in the HVACR industry. A2Ls are a new class of refrigerants classified by ASHRAE as mildly flammable and boast a significantly lower …