Medium Duty Exhaust Fan Propeller Dia 42 In. CFM @ 0.000-In. SP 22 322 Sones @ 0.000-In. SP @ 5 ft 23 Sones @ 0.250-In. SP @ 5 ft 21 Max Inlet Temp 104 Degrees F Voltage 208-230/460 60 Hz 3 Phase Full Load Amps 4.6-4.8/2.4 Motor HP 1-1/2 Max BHP 1.73 Bearing Type Regreasable Pillow Block Motor RPM 1750 Motor Type 3-Phase Motor Enclosure Totally Enclosed Fan-Cooled Motor Insulation Class F Fan RPM 479 Height 46 In. Width (In.) 46 Max Depth 23-1/2 In.