Unassembled Inline Belt Drive Duct Blower Wheel Diameter 10-1/4 Inches Airflow @ 0.125/0.500/0.750 Inch Static Pressure 2115/1835/1400 CFM Blower Speed 1008 RPM Sound Level @ 0.125 Inch Static Pressure 9.8 Sones Includes 3/4 HP 115/230 Volt Single Phase Motor And Drives Height 18 Inches Width 21 Inches Depth 23 Inches Uses Optional 3F538 Filter Rack