American Standard® Gas Furnace, Model: Silver S8X1, 120000 Btu/hr Input BTU Rating, 80 % AFUE, 1 Stage, LP Gas, Natural Gas, 34 in H x 24-1/2 in W x 28 in D Cabinet Dimensions, ECM Motor, 5 ton Tonnage, Hot Surface Ignition System, Additional Information: Silicon Nitride Ignition Element