Building HVAC Science
Uncover the secrets of healthy, comfortable, and energy-efficient buildings with the Building HVAC Science podcast. Join HVAC and building performance experts Eric Kaiser and Bill Spohn, Sr., as they delve into the fascinating world of building science and HVAC diagnostics. From exploring the latest advancements in measurement technology to examining the impact of building science and proper HVAC design and installation on human health and safety, this podcast is your one-stop shop for learning about all things in the built environment. In each episode, you'll gain valuable insights from industry leaders and discover practical tips for changing the way you approach your work. Whether you're a homeowner, facility manager, building performance or HVAC professional, this podcast is essential listening for anyone who cares about creating healthy, comfortable, and energy-efficient buildings. Here's what you can expect from the Building HVAC Science podcast: In-depth discussions on a wide range of building science and HVAC topics Interviews with experts from across the industry Practical tips for improving your building's performance Insights into the latest advancements in HVAC technology The occasional random topic
Episodes
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 what I promised, in the time promised, using the resources promised, that is good enough for me."
"The real skill is knowing when extra effort ...
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."
"Collecting data is getting easier. Interpreting it well is where the real value lives."
"True innovation isn't about chasing trends. It's...
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 time to understand."
"If even one episode helps someone take the next step in their career, then it's all been worth it."
Episode 250 of the Build...
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, chemistry, and smart filtering working together to tell you what's actually happening in the space."
In this episode, Bill & Eric sit down with Dave Massner from Sensorcon, a long...
"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 episode of the Building HVAC Science podcast, Eric and Bill sit down with long-time friend and contractor-turned-marketing pro, Aaron Husak. Aaron traces his winding path from ...
"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 Spohn
"What we have to learn to do, we learn by doing." - Aristotle
In this episode, Eric turns the mic around and interviews his co-host, Bill Spohn, about the evolution ...
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." — Carl Sagan
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 PHIUS. At the same time, Al recounts his journey from aspiring car enginee...
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 Brant...
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 installa...
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, Thalo Lab...
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 it for hot water while cooling.
The system keeps all refrig...
Quotes from the Episode:
"If it helps one person, then it's worth its weight in gold." —Roman
"Stop asking 'What if I fail?'—ask 'What if I'm amazing at this?'" —Roman
"I ran into the fire and rescued my future self." —Roman (riffing with Bill)
Roman Baugh—third-generation tradesman, educator at Kalos Services, and prolific HVAC content creator—joins ...
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 coder, eventually leading to Autodesk acquiring his early load-calc assets ...
"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 explore how AI can augment (not re...
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 recap three big themes: whole-home ...
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 affordable housing projects across North America.
She explains the c...
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 emotion and sharpen perspective. His insights reveal a person who values aut...
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 evolution of HVAC technology, and the crucial role training plays in creatin...
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 at SurveyMonkey, now applies her tech and behavioral insights to a spac...
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