Evaporative cooling is an entirely natural method of cooling, using only air and water - no artificial refrigerants. Hot air is drawn into the cooler and passes through water-moistened pads. Some of the water evaporates, absorbing the heat as it does so, and cools the air. A fan then blows this beautifully cooled air throughout the room and forces hot air out through open windows and doors. Because evaporative cooling is natural and the units dont require an enclosed space to work, they are an ideal solution for cooling open areas such as undercover patios and workshops.