Blower Radial Blade Belt Drive Unassembled Wheel Diameter 26 1/8 Inches Airflow @ 4/6/8 Inches Static Pressure 6925/5635/4135 CFM Blower Speed 1540 RPM Sound Level @ 5 Feet 85 dBA Includes 15 HP 230/460 Volt 3 Phase Open Dripproof Motor Drives And Weatherproof Drive Cover Maximum Inlet Temperature 250 Degrees F Shaft Diameter 1 15/16 Inch Height 43 1/8 Inches Width 45 3/8 Inches Depth 39 3/8 Inches Inlet Diameter 15 1/4 Inches Outlet Height 15 Inches Outlet Width 12 1/8 Inches