Williamson Centennial Low Boy Oil Furnace, Series 2 Series, 91,000 to 119,000 Btuh Input, 80,000 to 100,000 Btuh Output, 0.86 AFUE, 6 inch diameter Flue, 18-1/2 inch width x 15-1/2 inch D Side Return, Multi-Speed Direct Drive Blower Motor, 1/2 hp 10-10 Blower Motor, 21-1/2 inch width x 47-1/4 inch D x 38-1/2 inch H