Unassembled Inline Belt Drive Duct Blower Wheel Diameter 15-1/2 Inches Airflow @ 0.125/0.375/0.750 Inch Static Pressure 5470/5175/3250 CFM Blower Speed 645 RPM Sound Level @ 0.125 Inch Static Pressure 18.1 Sones Includes 2 HP 230/460 Volt Three Phase Motor And Drives Height 28 Inches Width 33 1/2 Inches Depth 32 Inches Uses Optional 3F541 Filter Rack