"Move big air with this TPI large diameter exhaust fan. Built for years of trouble-free service in all types of environments. Ball bearing, permanently lubricated, drip proof motor. Permanently lubricated bearings on blade drive shaft. Amps 6, HP 1/3, Air Delivery CFM 7,730, Fan Diameter in. 30, Volts 115, Speed RPM 1,725. 7730 CFM 1725 RPM 1/3 HP, 6 Amps, 115V motor 1 Phase Aluminum blade Powder-coated venturi Motor frame size 56 5/8in. shaft Dimensions 35.5in. x 34in. x 75in. x 17in."