Tubeaxial Fan Blade Diameter 16 in Maximum Motor Horsepower 1 hp Minimum Motor Horsepower 33/100 hp Maximum Motor Speed 2 547 RPM Minimum Motor Speed 1 570 RPM Maximum Airflow 3 859 cfm Minimum Airflow 2 379 cfm Maximum Static Pressure 1 in wc For Air Type Clean Air Assembly Unassembled Blade Material Aluminum Housing Material Steel Number of Blades 6 Standards AMCA Sound and Air Bolt Circle Diameter 17 1/2 in Includes Drive Package No Includes Motor No