1,48 In. Portable Air Cooler 2,Cools 4,000 sq. ft/ 3,high performance 4, Variable Speed 5 ... molded plastic polyethylene housing.2. Equipped with high performance 1 h.p./750W variable speed motor ... air hangers, livestock, warehousing, production lines, school events, outdoor dining, athletic fields, outdoor events, auto auctions, dry cleaners, greenhouse,etc. Industrial Portable evaporative air cooler ...