Williams Forsaire Counterflow Furnace, 65000 Btu/hr Input BTU Rating, 48000 Btu/hr Output BTU Rating, 115 VAC, 3 A, 440 cu-ft/min, 76% AFUE, Configuration: Natural Gas, 1/2 in Gas Connection, 14-1/8 in W x 87 in H x 10-1/4 in D Cabinet Dimensions, Wall Mounting, Soft White, Powder-Coated