High-Velocity Industrial Fan, Blade Dia. 18 in, Non-Oscillating, Voltage 208 to 230/460V AC, 3 Phase, CFM High 3800, Air Velocity @ 20 Ft. 475 fpm, Motor HP 1/2 hp, Motor RPM 1725, Operating Amps 2.4-2.3/1.2, Fan Mounting Location Fan Head Only, Max. Ambient Temp. 105 Degrees F, Hz 60 Hz, Motor Type 3 Phase, Outside Dia. 24 In., Height 24 in, Width 24 in, Max. Depth 16 In.