Tubeaxial Fan, Blade Diameter 48 in, Maximum Motor Horsepower 10 hp, Minimum Motor Horsepower 5 hp, Maximum Motor Speed 891 RPM, Minimum Motor Speed 731 RPM, Maximum Airflow 38,100 cfm, Minimum Airflow 31,260 cfm, Maximum Static Pressure 1 in wc, For Air Type Clean Air, Assembly Unassembled, Blade Material Aluminum, Housing Material Steel, Number of Blades 5, Standards AMCA Sound and Air, Bolt Circle Diameter 50 1/4 in, Includes Drive Package No, Includes Motor No, Bearing Type Ball Bearing