Motorized Impeller Impeller Type Backward Curve Motor Type Permanent Split Capacitor Fan Dia 9 in CFM @ 0.000-In. SP 756 cfm Voltage 115V AC 1.8 A Amps 185 W Watts 75 dBA Max Ambient Temp 122 Degrees F Depth 4 1/4 in Bolt Circle Dia 2 1/4 in Blade Material Fiberglass Reinforced Polyamide Mounting Position All Position 60 Hz Thermal Protection Auto Standards UL CSA Component Recognized Motor