120,000 BTU Two-Stage Ecm Variable Speed Natural Gas Furnace, Volts: 115, Hertz: 60, Phase: 1, Airflow: Downflow, Cfm: 2000, Efficiency: 96, Gas Connection: 1/2" N.P.T, Ignition: Hot Surface, Flue: 2", 1St Stage Input/Output Btu:120,000/116,400, 2nd Stage Input/Output Btu:78,000/75,660, Plenum Dims: 23-1/2"W X 20-7/8"D, Dims: 34"H X 24-1/2"W X 28-3/4"D, Weight:156Lbs, In Mfg Box, Made in USA. Approved Nat To Lp Conversion Kit:Baylpss400B Not Included