Tubeaxial Fan Blade Diameter 42 in Maximum Motor Horsepower 10 hp Minimum Motor Horsepower 1 1/2 hp Maximum Motor Speed 1 147 RPM Minimum Motor Speed 607 RPM Maximum Airflow 33 005 cfm Minimum Airflow 17 460 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 44 1/4 in Includes Drive Package No Includes Motor No