1,48 In. Portable Air Cooler 2,Cools 4,000 sq. ft/ 3,high performance 4, ... , could be used immediately after connecting water and electricity.4. Efficient environmental protection, evaporated with water without harmful refrigerants5. Fresh air 0-20 ... , athletic fields, outdoor events, auto auctions, dry cleaners, greenhouse,etc. Industrial Portable evaporative air cooler