ARMSTRONG AIR® Gas Furnace, Series: A801E Series, Input BTU Rating: 66000 Btu/hr, Output BTU Rating: 53000 Btu/hr, 120 V, 625 to 1400 cfm, 1/2 hp, 80 % AFUE Rating, 1 ph Phase, 60 Hz, 1 Stages, Upflow/Horizontal, 1/2 in Connection, Blower Size: 10 x 10 in, 33 in H x 14-1/2 in W x 28-3/8 in D Cabinet, Constant Torque/High-Efficiency Motor, 15 A Fuse Rating, Tonnage: 3 ton, 40 VA Transformer, 0.2 to 0.8 in-WC, 40 to 70 deg F Temperature Rise, Additional Information: 6.8 FLA Nominal, Aluminized Steel Heat Exchanger, Aluminized Steel Inshot Burner