Need to maximize your humidity control with minimal water usage? The Aprilaire Model 400 Humidifier is the solution for you. The Model 400 is a drainless humidifier, featuring evaporative technology to minimize water use.

Aprilaire® Humidifier, Bypass, 0.5 A, 24 VAC, 60 Hz, 3 gph Water Feed, 0.7 gph Evaporative, 12-3/4 in H x 10 in W Plenum Opening, Automatic Digital Control, 15-3/4 in H x 15-3/8 in W x 10-1/4 in D

• Minimal water usage
• No drain required
• No standing water
• Delivers optimum levels of humidity control with the automatic digital humidifier control, you never have to monitors your settings or wait until you feel uncomfortable
• Provides vital service, temperature and relative humidity indicators in manual modes as well
• Humidifier tightly constructed homes up to 4,200 sq-ft in size
• Has an evaporation capacity of 0.75 gallons per hour among the highest capacity humidifiers sold
• 6 in dia round opening