The Aprilaire Model 600 Humidifier is one of the best-performing bypass humidifiers on the market. As a large-capacity unit, the Model 600:

Features a built-in bypass damper, which means fewer parts to install

Delivers up to 50% more moisture than competitive units

Has an evaporation capacity of 0.70 gallons per hour

Humidifies tightly constructed homes up to 4,000 square feet in size