Aprilaire 400 Humidifier Bypass

This Whole-House Humidifier features a built-in bypass damper and utilizes new evaporative technology to minimize water use. Eliminates standing water, making it the perfect choice for homes with septic systems, locations where a floor drain is not available or families interested in water conservation. Has an evaporation capacity of 0.70 gallons per hour, humidifies tightly-constructed homes up to 4,000 square feet in size.