Heavy Duty Exhaust Fan Propeller Dia 30 In. CFM @ 0.000-In. SP 9474 Sones @ 0.000-In. SP @ 5 ft 16.3 Sones @ 0.250-In. SP @ 5 ft - Max Inlet Temp 104 Degrees F Voltage 208-230/460 60 Hz 3 Phase Full Load Amps 1.6-1.8/0.9 Motor HP 1/2 Max BHP 0.58 Bearing Type Regreasable Pillow Block Motor RPM 1725 Motor Type 3-Phase Motor Enclosure Totally Enclosed Nonventilated Motor Insulation Class B Fan RPM 687 Height 34 In. Width (In.) 34 Max Depth 20 In.