Detailed Product Description AC centrifugal fan,Centrifugal fan,Exhaust fan,Duct fan,Ventilation fan,Draught fan:400 TYPE1Dimension φ400×142mm2Bearing System 2 Ball Bearing 3Rated Voltage ... 48VDC 12V,24V,48,56V4Operating Voltage 36-57VDC5Starting Voltage 10VDC 6 ...