1,36 In. Portable Air Cooler, 2,Cools 2,500 sq. ft,/ 3,high ... Variable Speed; 3)Cools 2,500 sq. ft; 4) Portable evaporative cooling fan; Variable Speed 1. Durable one-piece molded ... p.,Variable speed motor.3. No need to install, portable, could be used immediately after connecting water and electricity. ... population density and others where need ventilation. HAILAN brand Portable evaporative air cooler