Blower Radial Blade Belt Drive Unassembled Wheel Diameter 19 1/8 Inches Airflow @ 5/7/9 Inches Static Pressure 3430/2765/1735 CFM Blower Speed 2125 RPM Sound Level @ 5 Feet 82 dBA Includes 9 1/16 HP 230/460 Volt 3 Phase Open Dripproof Motor Drives And Weatherproof Drive Cover Maximum Inlet Temperature 250 Degrees F Shaft Diameter 1 7/16 Inch Height 35 3/4 Inches Width 37 5/8 Inches Depth 28 5/8 Inches Inlet Diameter 11 1/4 Inches Outlet Height 11 Inches Outlet Width 9 1/16 Inches