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 Emergency Smoke Assembly Unassembled Blade Material Steel Housing Material Steel Number of Blades 6 Standards AMCA Sound and Air Bolt Circle Diameter 50 1/4 in Includes Drive Package No Includes Motor No Bearing Type Ball Bearing