Standard-Duty Industrial Fan Blade Dia 18 in Mobile Oscillating 2 Speeds Voltage 115V AC 1 Phase CFM High 4550 CFM Low 2950 Air Velocity @ 20 ft 365/315 fpm Motor HP 1/4 hp Motor RPM 1100/850 Operating Amps 2/1.4 Fan Mounting Location Fan Head Only Fan Accessory Style Standard Fan RPM 1100/850 Sound Level 72 dBA Max Ambient Temp 104 Degrees F Hz 60 Hz Watts 183/147 Motor Type Permanent Split Capacitor Drive Type Direct Drive Outside Dia 21 in Height 21 in