Imagine you’re asked to provide the usual PCA of a commercial building. But when you walk in, it smells... kinda funny or it feels, well... damp. Or maybe sometimes a client had had problems with mold, or occupants have been complaining about indoor air quality. In those situations, have you sometimes wished for a simple way to explain to the client the keys to effective humidity control and HVAC operation that affects IAQ? Or perhaps you sometimes wonder what to suggest to fix it humidity and IAQ problems that won’t break the bank? If so, you’ll enjoy Lew Harriman’s discussion of “The Secrets of Humidity Control.” Lew’s 40 years of experience provides some entertaining examples of problems and solutions in existing buildings, and some simple advise you can give clients when they want to assure reliable humidity control for a new building that’s still in design.