Have A Cool, Inexpensive Summer with the Sunpentown Air Cooler and Ionizer. Using tap water and ice (2 trays), this air cooler can get up to 15 degrees cooler than a regular fan at half the cost of most air conditioners. The 3 speed fans allows you to choose the level that is most comfortable to you. Clean Air provided by the ionizer in this unit lets you enjoy cool, crisp, clean air all summer long. The negative ionizer can clean up to 200 sq. ft. and remove nasty allergens while furnishing a cool environment.