Fresh water is drawn from a source, Apowerfulwater pump forces the water through the centrifugal misting disk. This high-pressure pump and misting disk combination produce a very fine vapor which quickly evaporates—in fact, it flash-evaporates when introduced to moving air. This action requires energy, which is obtained by drawing heat out of the air, thus cooling the air dramatically.Since the water evaporates so quickly, the result is cooled air without creating a damp environment.