Exhaust Fan Corrosion Resistant Medium Performance Blade Dia 18 In. CFM @ 0.000-In. SP 3750 CFM @ 0.050-In. SP 3625 CFM @ 0.125-In. SP 3500 Max Ambient Temp (F) 140 Fan Voltage 120VAC 60 Hz 1 Phase Full Load Amps 3.3 Full Load Watts 350 Exhaust/Supply Fan Motor HP 1/4 Bearing Type Sealed Ball Motor RPM 1520 Motor Type Permanent Split Capacitor Motor Enclosure Totally Enclosed Air-Over Motor Insulation Class F Thermal Protection Automatic Height (In.) 23-3/8