Aprilaire Model 400 Humidifier

Aprilaire Model 400 Humidifier


Aprilaire 400A Whole-house Humidifier

Need to maximize your humidity control with minimal water? Choose the Model 400A with automatic digital control

The Aprilaire Model 400A Whole-House Humidifier features a built-in bypass damper and utilizes new evaporative technology to minimize water use. Gravity pulls water down, while the wicking action of the Water Panel draws it back to the top, using 100% of the water delivered to the unit.

  • Features truly automatic control
  • 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 a 4,000 square foot in size