Behind the Drywall – The Psychrometrics of a Hidden Moisture Failure - Short #298

HVAC School - For Techs, By Techs · Aug 11, 2026 · 15m

In this short episode, Bryan and Roman talk about the psychrometrics of a hidden moisture failure... behind the drywall. Roman had an indoor air quality and mold assessment in his own home, and he learned that there were active mold spores in his home; he shares what he learned from the experience.

Roman had a bulk water issue from plumbing (though bulk water issues can also occur outside the building or from condensate drainage problems). Walls are NOT solid; they have plumbing and insulation inside, and the air spaces between the walls support a microclimate when moisture is in there…