"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. Fan Diameter in. 30, Air Delivery CFM 7,730, Amps 6, HP 1/3, Speed RPM 1,725, Volts 115. 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."