1,36 In. Portable Air Cooler, 2,Cools 2,500 sq. ft,/ 3,high performance, 4 ... motor.3. No need to install, portable, could be used immediately after connecting water and electricity.4. Efficient environmental protection, evaporated ... venues and greenhouses.3)Others:Somewhere there are polluted gas, population density and others where need ventilation. HAILAN brand Portable evaporative air cooler