Aircoolers are sometimes confused for airconditioners, but there is quite a difference between the two. An airconditioner removes the warm air from a room, while dehumidifying the air in the proces. This happens because there is more moisture in warm air than in cold air. An aircooler, on the other hand, cools the room by evaporating water an blowing the cool air that ensues into the room. This makes the humidty levels in the room rise as well. Also, aircoolers are slightly less effective than airconditioners, but will still get your room nice and cool in the summer!