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Outdoor Air & Ventilation Strategies with John Semmelhack, Ty Branaman & Tim De Stasio
In this live-stream episode, Bryan is joined by Tim DeStasio, John Semmelhack, and Ty Branaman for a deep dive into residential ventilation — the often-overlooked "V" in HVAC. The group opens with quick life updates before launching into a wide-ranging conversation covering the three core ventilation strategies (circulation, extraction, and dilution), how tight home construction changes the ventilation equation, and why there is no single "magic number" that works for every house.
A major theme is the physics of pressurization and depressurization. Tim walks through balanced strategies (ERVs…
The skinny
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