Special Same Day* Ground Shipping On The Aprilaire 400M Humidifier!

The Aprilaire Model 400M 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. The Aprilaire Model 400M Whole-House Humidifier is the newest addition to the extensive line of Aprilaire Humidifiers and may be the perfect solution for your home. This unit comes with the manual control (non-digital).

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• Features manual 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.