Tubeaxial Fan Blade Diameter 54 in Maximum Motor Horsepower 10 hp Minimum Motor Horsepower 5 hp Maximum Motor Speed 743 RPM Minimum Motor Speed 590 RPM Maximum Airflow 43 815 cfm Minimum Airflow 34 793 cfm Maximum Static Pressure 1 in wc For Air Type Clean Air Assembly Unassembled Blade Material Steel Housing Material Steel Number of Blades 6 Standards AMCA Sound and Air Bolt Circle Diameter 56 1/4 in Includes Drive Package No Includes Motor No Bearing Type Ball Bearing