Unassembled Inline Belt Drive Duct Blower Wheel Diameter 12-7/8 Inches Airflow @ 0.125/0.250 Inch Static Pressure 2305/1880 CFM Blower Speed 544 RPM Sound Level @ 0.125 Inch Static Pressure 6.3 Sones Includes 1/3 HP 115/230 Volt Single Phase Motor And Drives Height 23 Inches Width 27 Inches Depth 27 1/2 Inches Uses Optional 3F540 Filter Rack