Blower: 8 in Wheel, With Drive, 805 cfm @ 0.250 in SP, 1 6 hp, 115 230V AC, 1 Ph The variable speed trigger allows The variable speed trigger allows you to adjust the speed of the drill making it easier to control for precise drilling and driving empty and rinse each tank individually 725 RPM Motor Type Split Phase Maximum Fan Speed 978 RPM Outlet Duct Connection Height 8 1 4 in Outlet Duct Connection Width 9 1 8 in Inlet Duct Connection Height 13 3 8 in Inlet Duct Connection Width 15 7 8 in Shaft Diameter 3 4 in Overall Height 15 1 4 in Overall Width 18 in Overall Depth 23 in Mounting Orientation Horizontal Features 1 2 in Internal Fiberglass Insulation Helps Isolate Noise and Overcome Condensation on Cabinet When Used in Cooling Applications These blowers come with a drive package that includes a motor