Aprilaire 350 Whole House Humidifier w/Thermostat - 0.50 Gallons/Hour Completely Self Contained Humidifier Includes Manual Humidistat Control Easily Fits Inside of Closets, Heated Crawl Spaces and Basements Evaporative Capacity of 0.50 gallons Per Hour Humidifies Tightly Constructed Homes Up to 3,000 Square Feet Works Extremely Well In Homes with Central Heating and Cooling Systems