Exhaust Fan, Assembled Unassembled, Blade Diameter 48 in, Blade Material Steel, Frame Material Steel, For Maximum Motor Horsepower 3 hp, For Maximum Motor Speed 618 RPM, For Minimum Motor Horsepower 1/2 hp, For Minimum Motor Speed 341 RPM, Maximum Airflow 31,442 cfm, Maximum Static Pressure 0.75 in wg, Minimum Airflow 14,214 cfm, For -Out Height 50 1/2 in, For -Out Width 50 1/2 in, For -Out Diameter 50 1/2 in, Guard Type None, Method of Construction Stamped, Number of Blades 6