Exhaust/Supply Fan Assembled Unassembled Blade Diameter 30 in Blade Material Aluminum Frame Material Steel For Maximum Motor Horsepower 3 hp For Maximum Motor Speed 1 474 RPM For Minimum Motor Horsepower 1/3 hp For Minimum Motor Speed 714 RPM Maximum Airflow 16 061 cfm Maximum Static Pressure 0.75 in wg Minimum Airflow 7 780 cfm For Cut-Out Height 32 1/2 in For Cut-Out Width 32 1/2 in For Cut-Out Diameter 32 1/2 in Guard Type None Method of Construction Cast Number of Blades 6