Blower Radial Blade Belt Drive Unassembled Wheel Diameter 15 5/8 Inches Airflow @ 4/7/10 Inches Static Pressure 2880/2250/1485 CFM Blower Speed 2815 RPM Sound Level @ 5 Feet 83 dBA Includes 7 1/2 HP 230/460 Volt 3 Phase Totally Enclosed Motor Drives And Weatherproof Drive Cover Maximum Inlet Temperature 250 Degrees F Shaft Diameter 1 3/16 Inch Height 29 15/16 Inches Width 35 3/8 Inches Depth 23 7/8 Inches Inlet Diameter 9 1/4 Inches Outlet Height 9 Inches Outlet Width 7 1/2 Inches