Blower: 8 in Wheel, With Drive, 805 cfm @ 0.250 in SP, 1 6 hp, 115 230V AC, 1 Ph Constructed of solid woods and Constructed of solid woods and manufactured woods for strength and durability Construction features solid Pine hardwood 805 cfm @ 0 725 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