... Product Description AC centrifugal fan,Centrifugal fan,Exhaust fan,Duct fan,Ventilation fan,Draught fan,Exhaust blower,Draft fan, ... Air Coditioning Fan This series fan is widely used in central air conditioning units, special air conditioners, rail ventilation ... (EC = electronically commutated) is an environmentally sound and, in the long run, more cost-effective alternative to AC technology ...