Spirit Lowboy Oil Furnace, Series: VLF Series, 120 VAC, 11.2 A, 3/4 hp, 60 Hz, 1 ph Phase, 1500 rpm Rotational Speed, 84000 Btu/hr Low Fire, 105000 Btu/hr Medium Low Fire, 119000 Btu/hr Medium High Fire, 140000 Btu/hr High Fire Input BTU Rating, 70000 Btu/hr Low Fire, 88000 Btu/hr Medium Low Fire, 98000 Btu/hr Medium High Fire, 114000 Btu/hr High Fire Output BTU Rating, 85 % AFUE Rating, 20 x 12-1/2 in Connection, Counterflow, Horizontal, 4 ton Tonnage, 6 in Dia Flue Size, Front Fuel, 10 x 20 in Filter, Direct Drive, Beckett Burner, Direct Spark, Interrupted Ignition, PSC Motor, 4 Speed, Direct Vent, 130 psi, Fiberglass, Powder-Coated, 70 deg F Temperature Rise, 22-1/4 in W x 47 in D x 41-1/2 in H, Additional Information: 27.8 sq-ft Heat Exchanger Area