Features. Drum Fan 42 Belt Drive 12 HP with two speeds. High Speed 537 RPMs 13781 CFM with power consumption 606 Watts. Low Speed 440 RPMs 9859 CFM with power consumption 481 Watts. 4 aluminum blades for balanced operation and two 8 rubber wheels for easy movement. 120 Volt 60Hz 507 Amps 18m power cord with UL plug. Ball bearing permanently lubricated permanent split capacitorSpecifications. Color Safety Yellow. Voltage 120V. Frequency 60 Hz. Amperage 507A. Size 42. Weight 98 lbs