Exhaust Fan, Assembled Unassembled, Blade Diameter 60 in, Blade Material Aluminum, Frame Material Steel, For Maximum Motor Horsepower 15 hp, For Maximum Motor Speed 699 RPM, For Minimum Motor Horsepower 5 hp, For Minimum Motor Speed 485 RPM, Maximum Airflow 69,692 cfm, Maximum Static Pressure 0.75 in wg, Minimum Airflow 48,356 cfm, For -Out Height 62 1/2 in, For -Out Width 62 1/2 in, For -Out Diameter 63 1/2 in, Guard Type None, Method of Construction Cast, Number of Blades 6