Axial Downblast Roof Exhaust Fan Mounting Location Roof Assembly Assembled Blade Diameter 10 in Housing Material Aluminum Exhaust Airflow @ 0.000 in SP 550 cfm For High-Static Pressure Applications No High-Efficiency Motor No Maximum Static Pressure 1/2 in wc Motor Enclosure Totally Enclosed Air Over Motor Horsepower 1/8 hp Nameplate Voltage 115V AC Number of Speeds 1 Phase 1 Maximum Inlet Air Temperature 120 Degrees F Number of Blades 4 Supply Airflow @ 0.000 in SP 550 cfm