"The Wallmaster exhaust fan eliminates heat build up in barns, greenhouses and industrial buildings. Constructed with a sturdy 18-g. galvanized steel housing, a 1ft. x 2in. mesh intake guard and an exhaust shutter. U.S.A. Fan Diameter in. 50, HP 1, Air Delivery CFM 20,900, Amps 3.0/1.5, Dimensions L x W x H in. 54 x 27 x 54, Needs to be Hardwired Yes, Speed RPM 575, Speeds qty. 1, Volts 230/460. 3 wing cast aluminum blade Three-phase motor Guard is hot dip galvanized after welding and attached with noise-reducing clip Aluminum shutter has two tie bars to reduce flapping in high wind Maintenance-free motor 54 1/4in. square rough-in"
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