Williamson Centennial Low Boy Oil Furnace, Series 2 Series, 140,000 to 168,000 Btuh Input, 120,000 to 142,000 Btuh Output, 0.86 AFUE, 7 inch diameter Flue, 22-3/4 inch width x 13-1/2 inch D Side Return, Multi-Speed Direct Drive Blower Motor, 1 hp 12-10 Blower Motor, 25-1/4 inch width x 52-1/2 inch width x 40-3/4 inch H