AirCare H12600 Digital Whole-House Console-Style Evaporative Humidifier, Copper Night Humidifies 3,700 square feet; 11.9 gallons of output per day Evaporative system uses natural humidity; no white dust Protects skin, plants, furniture, electronics from harmful, dry air Exclusive comfort sensor humidistat; 4-speed fan Rolling casters; 2-year limited warranty Protects your family from flu virus:  Centers for Disease Control testing has shown that relative humidity levels of 43% or more reduces the ability for the flu virus to survive.* Reduces static electricity: eliminate annoying static shocks and protect your investment in your home electronics. Nurtures well-being:  soothes a scratchy throat, dry skin and eyes, and alleviates allergy symptoms. Nourishes your furnishings: hydrate your fine wood and leather furnishings, reduce creaking wooden floors.