Evaporative coolers (also recognized as evaporative air conditioners, swamp coolers, swamp boxes, wilderness coolers, and moist air coolers) are gadgets that cool air thru the evaporation of water. Evaporative cooling differs from different air-conditioning structures that use vapor-compression or absorption refrigeration cycles. Through the section exchange (evaporation) of liquid water to water vapor, the temperature of the drying air can be drastically reduced.