... ; 3)Cools 1,800 sq. ft; 4)Portable evaporative cooling fan; Variable Speed 1. Durable one-piece molded ... protection, evaporated with water without harmful refrigerants5. Fresh air 0-6,700 CFM, cools 1,800 sq ft ... .6. Almost maintenance-free operation and longer life.Air Delivery(CFM) 0-6,700Fan Motor(hp) 1/ ... , population density and others where need ventilation. Evaporative air Conditioners