... noise and easy install 4.Specially Electronic dust inside ALTO Industrial axial fresh air ventilator Features:1.Abundant capacity The ... is 1500~10000 m3/h ,it can be used in house, confrence,laboratory,office,machinery room,gymnasium and so on. ... Air purification,energy recovery,two direction of ventilation etc.ALTO Industrial axial fresh air ventilator Parameter:Service For: Alto Refrigeration ...