Confined Space Fan, Blower/Fan Speed 3,450 RPM, Current (A) 21 A, Duct Diameter 20 in, Horsepower 2 hp, Maximum Flow in Free Air 7,500 cfm, Voltage 115/230 V AC, Color Orange, For Use With 20 in Duct, Material Aluminum, Epoxy, Nylon, Polyester, Polypropylene, PVC, Rubber, Steel, Vinyl, Height 22 1/2 in, Length 19 in, Width 22 in, Standards CSA Certified, UL Recognized, Type Axial