... , evaporated with water without harmful refrigerants5. Fresh air 0-20,000 CFM, cools 4,000 sq ... 6. Almost maintenance-free operation and longer life. Air Delivery(CFM) 20,000Fan Motor(hp) 1Voltage ( ... air hangers, livestock, warehousing, production lines, school events, outdoor dining, athletic fields, outdoor events, auto auctions, dry cleaners, greenhouse,etc. Industrial Portable evaporative air ...