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The Conscious Builder Show with Casey Grey

May 5, 2022

Bill Spohn is President and owner of, an award-winning reseller of tools and test instruments. He holds a BS & MS in Mechanical Engineering and is a Registered Professional Engineer (PE) in Pennsylvania. Over the last 30 years, Bill has built his career on creating, designing, and marketing a wide array of test and measurement products that work for technicians in the field including 10 years each at Bacharach and Testo. Bill is all about Science – Comfort, health and energy efficiency. He has worked on BPI, RESNET, GAMA, AHRI, OMA, RSES, NATE, and ACCA Technical Committees, and holds four US patents in instrumentation design. He regularly consults, teaches and writes on product applications in HVACR, building science, healthy homes, Indoor Air Quality, and weatherization. Bill sits on the boards of the Building Performance Association (BPA), the Green Home Institute (GHI) and Solar United Neighbors of Pennsylvania (SUN-PA) He and his wife have built and live in a modular, high-performance, “Net-Zero” home near Pittsburgh, PA. Keep tabs on the details at


For more from Bill: 

 Tour Bill Spohn's New Modular Net Zero Home - YouTube


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2:00 introduction Bill  

3:10 Trutech tools start up - hvac, building performance tools

4:30 types of tools for HVAC   - if you’re not testing you’re just guessing 

6:35 duct leak testing - standard test, bluetooth testing, higher end diagnostic tools

9:00 Indoor air quality -  what you can and should measure, what can you do, ventilation, filtration and humidity control solutions 

16:10 Net Zero Home

18:30 cost to go passive, phpp model completed 

19:15  US tax credit, co op program deal on solar

20:20 modular design  - eco craft homes

22:55 custom design, factory and site  constraints 

23:45 blower door test,  thermal imaging,