... with wheel 3.Optional three wind speed effective factory air conditioner why use air cooler ?1.Air coolers are environmentfriendly. ... in open spaces (gardens, terraces and verandas) where an air conditioner will not be effective.Specifications : Motor 1-phase, three-speedCooling ... , fresh air .ventilation & exhaust , power-saving and effective air conditioner for factory power-saving and effective air ...