Exhaust Fan, Assembled Unassembled, Blade Diameter 24 in, Blade Material Steel, Frame Material Steel, For Maximum Motor Horsepower 1 1/2 hp, For Maximum Motor Speed 1,065 RPM, For Minimum Motor Horsepower 1/3 hp, For Minimum Motor Speed 643 RPM, Maximum Airflow 10,002 cfm, Maximum Static Pressure 0.75 in wg, Minimum Airflow 6,039 cfm, For -Out Height 26 1/2 in, For -Out Width 26 1/2 in, For -Out Diameter 26 1/2 in, Guard Type None, Method of Construction Stamped, Number of Blades 5