80,000/77,600 BTU Communicating Compatible Modulating Upflow/Horizontal Low Nox Natural Gas Furnace, Volts:115, Hertz:60, Phase:1, Airflow:Upflow/Horizontal, Cfm:1600, Efficiency:97%, Gas Connection:1/2" N.P.T., Ignition:Silicon Nitride, High Fire Input/Output Btu'S:80,000/77,600, Low Fire Input/Output Btu'S:40,000/38,800, Plenum Dims:16"W X 191/2"D, Dims:34-1/2"H X 21"W X 28-7/8"D, Weight:142 Lbs, In Mfg Box, Made in USA