1,36 In. Portable Air Cooler, 2,Cools 2,500 sq. ft,/ 3,high performance, ... environmental protection, evaporated with water without harmful refrigerants5. Fresh air 0-12,000 CFM, cools 2,500 sq ft.6 ... . Almost maintenance-free operation and longer life. Evaporative cooling Air Delivery(CFM) 0-12,000Fan Motor(hp) 1/2Voltage/ ... and others where need ventilation. HAILAN brand Portable evaporative air cooler