Looking for Answers about Triangle Fans Direct-Drive General-Purpose Exhaust Fan - 20in., 1/4 HP?

Rugged design provides continuous operation in workshops, barns, poultry houses, greenhouses, garages, anywhere air movement controls condensation and reduces stagnant air. 20in. fan delivers 3200 CFM @ 1650 RPM. U.S.A. 3-year limited warranty. Fan Diameter (in.): 20, Air Delivery (CFM): 3,200, HP: 1/4, Volts: 115, Speeds (qty.): 1, Dimensions L x W x H (in.): 27 x 14 1/2 x 25, Needs to be Hardwired: Yes, Speed (RPM): 1,650 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