Motorized Impeller Impeller Type Backward Curve Motor Type Permanent Split Capacitor Fan Dia 12 1/2 in CFM @ 0.000-In. SP 1 330 cfm Voltage 230V AC 0.88 A Amps 180 W Watts 63 dBA Max Ambient Temp 122 Degrees F Depth 6 1/8 in Bolt Circle Dia 3 1/2 in Blade Material Aluminum Mounting Position All Position Except Rotor Up 60 Hz Thermal Protection Auto Standards UL CSA Component Recognized Motor