Champion Cooler RWC35 2-Speed Window Evaporative Cooler, 3300 CFMThe RWC35 evaporative window cooler with remote control provide high performance in a small package. Evaporative coolers are intended for use in dry, arid climates. They can lower indoor temperatures by as much as 15 20F. Evaporative coolers have low installation maintenance costs; use 75% less electricity; no ozone damaging refrigerants. The water saturated pads act as a type of filter, removing dust and allergens from the air. Cools 500 900 sq. ft.