Rugged design provides continuous operation in workshops, barns, poultry houses, greenhouses, garages, anywhere air movement controls condensation and reduces stagnant air. 12in. fan delivers 5460 CFM @ 1100 RPM. U.S.A. 3-year limited warranty.Fan Diameter (in.) 24 Air Delivery (CFM) 5,460 at 1,100 RPM HP 1/2 Volts 115 Dimensions L x W x H (in.) 30 3/4 x 6 x 30 3/4 with Flanges, 29 Square w/o Flanges Needs to be Hardwired Yes. * Totally enclosed air over (TEAO) thermally protected motor * Heavy-gauge galvanized steel fan frame reduces rust and corrosion * Built-in shutter opens automatically when fan is turned on and closes when fan is turned off * U.S.A. * 3-year limited warranty