Exhaust Fan, Assembled Unassembled, Blade Diameter 42 in, Blade Material Steel, Frame Material Steel, For Maximum Motor Horsepower 5 hp, For Maximum Motor Speed 713 RPM, For Minimum Motor Horsepower 3/4 hp, For Minimum Motor Speed 380 RPM, Maximum Airflow 33,227 cfm, Maximum Static Pressure 0.75 in wg, Minimum Airflow 17,709 cfm, For -Out Height 44 1/2 in, For -Out Width 44 1/2 in, For -Out Diameter 44 1/2 in, Guard Type None, Method of Construction Stamped, Number of Blades 5