... 2.Easy move with wheel 3.Optional three wind speed effective factory air conditioner why use air cooler ?1.Air coolers ... , terraces and verandas) where an air conditioner will not be effective.Specifications : Motor 1-phase, three-speedCooling pad size(L× D ... : humidification ,cooling air , fresh air .ventilation & exhaust , power-saving and effective air conditioner for factory power-saving and ...