Motorized Impeller Impeller Type Backward Curve Motor Type Permanent Split Capacitor Fan Dia 7 1/2 in CFM @ 0.000-In. SP 345 cfm Voltage 230V AC 0.3 A Amps 65 W Watts 60 dBA Max Ambient Temp 167 Degrees F Depth 2 45/64 in Bolt Circle Dia 2 9/32 in Blade Material Fiberglass Reinforced Polyamide Mounting Position Universal 60 Hz Thermal Protection Auto Standards UL