250 Episodes of Building HVAC Science: What We've Learned About Buildings, Comfort, and Better HVAC Work

The Building HVAC Science podcast just hit episode 250, and after years of conversations with contractors, educators, manufacturers, and innovators, hosts Bill Spohn and Eric Kaiser are taking a step back to reflect on what they've learned and where the industry is headed next. It's a look at how understanding evolves when you spend enough time asking the right questions.

What's Changed

Bill and Eric talk through concepts that reshaped how they approach HVAC work: heat transfer, mean radiant temperature, air sealing, and the shift from treating systems as standalone equipment to understanding buildings as complete, interconnected systems.

"Good building systems don't start with equipment—they start with a plan and a thoughtful process." —Bill Spohn

Technology has made diagnostics better. Apps and smart tools help you see what's happening inside a building. But good outcomes still depend on mindset and process. The most overlooked practice in the trade? Taking time to actually think through a problem before jumping to a solution.

Where It's Going

Bill and Eric share what they hope becomes standard practice over the next decade: normalizing system testing, making indoor air quality assessments routine, and improving how we predict and communicate comfort. It's not just about better tools. It's about better thinking.

"Reaching 250 episodes reminds me of the two reasons why we started this podcast: to help people see the science behind great HVAC work and to appreciate the Building Science involved in making HVAC systems work best. The industry keeps evolving, and the conversations keep getting better. I'm grateful for every guest and every listener who's come along for the ride." —Bill Spohn

"Hitting 250 published episodes tells me the podcast is providing something important and interesting to industries that have been intertwined from the beginning and are now working together more than ever. Being able to have a small part in helping industries deliver better indoor occupant health and comfort is very humbling and special." —Eric Kaiser

Listen Here

Episode 250: Beyond the Equipment

Connect with the team:
Eric Kaiser on LinkedIn
Bill Spohn on LinkedIn