Tubeaxial Fan Drive Type Belt Drive Includes Drive Package Yes Includes Motor Yes Blade Diameter 48 in Nameplate Voltage 208-230/460V AC Phase 3 Motor Horsepower 7 1/2 hp Airflow @ 0.000 in SP 35 365 cfm Maximum Noise Level @ 5 Feet 88 sones Assembly Unassembled For Air Type Emergency Smoke Blade Material Steel Housing Material Steel Number of Blades 5 Number of Speeds 1 Motor Enclosure Totally Enclosed Fan Cooled Standards AMCA cULus Bolt Circle Diameter 50 1/4 in