Want the perfect humidity level for any season? Take a look at the Model 600A. $468.34 or Model 600M. $425.17
The Aprilaire Model 600 Whole-House Humidifier features trulyautomatic control, plus a built-in bypass damper, which means fewer parts to install. The bypass damper is conveniently labeled for both summer and winter settings, allowing you to set it for the entire season with no guesswork involved. The Aprilaire Model 600 Whole-House Humidifier is simply the best performing bypass humidifier on the market.