Keystone 7.5-Liter Indoor Evaporative Air Cooler (Swamp Cooler) in White

Keystone evaporative air coolers, also called swamp coolers, are intended for use in hot dry climates where the humidity is low (less than 60%). Evaporative air coolers can lower indoor temperatures by as much as 15 to 20°F by combining the natural cooling properties of water with a steady breeze from an efficient air moving system. Swamp coolers use nearly 75% less electricity than air-conditioners and use no ozone damaging refrigerants. Also, the water saturated pads act like a filter, removing dust from the air. Buyers Note: For those living in more humid climates, consider using Keystone portable air conditioning units or window air conditioners.