Evaporative Coolers and Accessories
Evaporative coolers─also known as swamp coolers─don\'t require refrigerant so there\'s no recharging and they cost less to operate than refrigerant-based air conditioners. Swamp coolers are most effective in drier climates where relative humidity is below 75%. They draw in warm air from the outdoors, pass it over water-saturated pads where evaporation cools and humidifies the air, and blow out the fresh, cooled air. The absorbent pads used in swamp coolers provide a large surface area for evaporation to generate a high volume of cooled air.