... electricity.4. Efficient environmental protection, evaporated with water without harmful refrigerants5. Fresh air 0-20,000 CFM, cools 4,000 sq ... (Gal) 50Weight(lbs) 360 Application areas:Body shops, service garages, air hangers, livestock, warehousing, production lines, school events, outdoor dining, ... outdoor events, auto auctions, dry cleaners, greenhouse,etc. portable evaporative Water air cooler