Tubeaxial Fan Drive Type Belt Drive Includes Drive Package Yes Includes Motor Yes Blade Diameter 24 in Nameplate Voltage 208-230/460V AC Phase 3 Motor Horsepower 2 hp Airflow @ 0.000 in SP 9 112 cfm Maximum Noise Level @ 5 Feet 43 sones Assembly Unassembled For Air Type Emergency Smoke Blade Material Steel Housing Material Steel Number of Blades 6 Number of Speeds 1 Motor Enclosure Totally Enclosed Fan Cooled Standards AMCA cULus Bolt Circle Diameter 25 3/4 in