75,000 BTU Modulating Communicating Compatible Natural Gas Furnace, Volts:115, Hertz:60, Phase:1, Airflow:Downflow, Efficiency:90.3, Cfm:600-1200, Flue:2-1/2", Ignition:Direct Spark, Input Btu:75,000, Output Btu:69,000, Plenum Dims:16-3/8"W X 20-1/4"D, Dims:34"H X 17-3/4"W X 28-1/8"D, Weight:132 Lbs, Approved Nat To Lp Conversion Kit: Rxgj-Fp27Mx (Not Included)Combustible Floor Base Rxgc-B17, Rxgc-B21, Rxgc-B24 (Not Included)