Episodes

Jan. 30, 2026

EP255 Beyond Manual J: The Heat Balance Future of Residential Load Calculations With Tony Amadio (December 2025)

Notable quote from the episode: Make it as simple as possible, but not simpler. In this episode, Eric Kaiser sits down with mechanical engineer Tony Amadio, the founder of True Loads, to talk about what actually makes residen...
Jan. 23, 2026

EP254 Mold, Moisture, and Missed Details: Lessons From the Building Science Trenches With Kohta Ueno (January 2026)

QUOTES from the episode: “Most building failures aren’t mysterious. They’re just ignored fundamentals.” “If you demand museum-level humidity, you’re no longer building a house. You’re building a museum.” “Moisture meters don’...
Jan. 16, 2026

EP253 The HVAC Trust Gap, and the Directory Built to Close It With Kevin R. Hart, Huff Hoffmaster & Darren Reuter (January 2026)

Quotes from the episode: “Better isn’t a goal, it’s a direction.” “HVAC can feel like a house of mirrors for homeowners, and the cure is transparency plus measured results.” “We’re not trying to find the perfect contractor. W...
Jan. 9, 2026

EP252 The Perfection Trap in the Trades With Eric Kaiser (December 2025)

Quotes from the episode: “Good enough isn’t a fixed point. It’s a moving target shaped by goals, expectations, and consequences.” “Perfection can push us forward, but it can also quietly pull us off track.” “If I delivered wh...
Jan. 2, 2026

EP251 Innovation in HVAC: The Quiet Shifts That Matter Most With Bill Spohn (December 2025)

Quotes from the Episode: “Innovation in HVAC isn’t one big breakthrough. It’s a series of quieter shifts that slowly change how we work.” “The future of HVAC depends on the people who measure, verify, and continuously improve...
Dec. 26, 2025

EP250 Beyond the Equipment: Reflections on 250 Episodes of HVAC and Building Science with Eric and Bill (December 2025)

Quotes from the Episode: “Good building systems don’t start with equipment—they start with a plan and a thoughtful process.” “Most comfort problems aren’t equipment problems; they’re building problems we haven’t taken the tim...
Dec. 19, 2025

EP249 The Hidden Hazards: CO, H₂S and the Tech Behind Modern Gas Detection With Dave Massner from Sensorcon (December 2025)

Episode quotes: “Hydrogen sulfide doesn’t announce itself. It can drift in, hit your mucus membranes, and start causing real harm before you know it’s there.” “You can’t treat sensor response like magic—it’s physics, chemistr...
Dec. 12, 2025

EP248 Balanced Comfort, Brutal Lessons: Scaling, Losing Half Your Revenue, and Starting Over with AI with Aaron Husak (November 2025)

“Inspect your marketing the way you’d inspect a home—run diagnostics, don’t guess.” – Aaron Husak “Attitude is way more important than aptitude. One bad apple really can infect the whole company.” – Aaron Husak In this episod...
Dec. 5, 2025

EP247 From CEO to Chief Education Officer: Bill Spohn on Legacy, Leadership & Better HVAC (November 2025)

“Get mad at the problem, not the person. When people feel safe, they’ll actually bring you the real issues.” - Bill Spohn “We’re woven into the fabric of this industry. The industry made me—so in a way, it owns me.” - Bill Sp...
Nov. 28, 2025

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

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 ...
Nov. 21, 2025

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

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 buildi...
Nov. 14, 2025

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

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 understan...
Nov. 7, 2025

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

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 g...
Oct. 31, 2025

EP242 "Give Every Heat Pump a Cell Phone" — Predictive HVAC with Thalo Labs With Brendan Hermalyn (October 2025)

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 mea...
Oct. 24, 2025

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

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 integrati...
Oct. 17, 2025

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

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 ...
Oct. 10, 2025

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

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....
Oct. 3, 2025

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

“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, rec...
Sept. 26, 2025

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

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’...
Sept. 19, 2025

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

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 scienc...
Sept. 12, 2025

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

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—whe...
Sept. 5, 2025

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

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 passiona...
Aug. 22, 2025

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

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 Dehumidifi...
Aug. 15, 2025

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

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 journe...