Exhaust/Supply Fan Assembled Unassembled Blade Diameter 48 in Blade Material Aluminum Frame Material Steel For Maximum Motor Horsepower 5 hp For Maximum Motor Speed 1 007 RPM For Minimum Motor Horsepower 3/4 hp For Minimum Motor Speed 539 RPM Maximum Airflow 35 694 cfm Maximum Static Pressure 0.75 in wg Minimum Airflow 19 105 cfm For Cut-Out Height 50 1/2 in For Cut-Out Width 50 1/2 in For Cut-Out Diameter 50 1/2 in Guard Type None Method of Construction Cast Number of Blades 6