Aprilaire 700M Whole-House Humidifier with Manual Control
The Aprilaire Model 700M Whole-House Humidifier features a built-in bypass damper. 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 700 Whole-House Humidifier is simply the best performing bypass humidifier on the market.