The TPI commercial exhaust fan is ideal for turning over a large volume of air rapidly. Heavy-gauge construction makes fan a popular choice for agricultural and horticultural applications. U.S.A.Fan Diameter (in.) 48 Air Delivery (CFM) 21,500 Volts 120 Speeds (qty.) 1 Dimensions L x W x H (in.) 54 x 4 x 54 Needs to be Hardwired Yes. * Single phase * Ideal for turning over a large volume of air rapidly * Heavy-gauge construction * Suitable for agricultural and horticultural applications * Permanently lubricated, drip-proof motor