66,000 BTU Downflow Gas Furnace, Efficiency: 96%, Volts: 120, Hertz: 60, Phase: 1, CFM: 1700, Stage: Two, Speed: Variable, Motor Type: ECM, BTU Input: 66,000, BTU Output: 64,000, Dimensions: 33''H X 17-1/2''W X 28-1/2''D, Weight: 136 lbs ***Propane Conversion Kit: 11K48 (Not Included)*** ***Unit includes a Manufacture Warranty, register your unit with the Manufacturer for details***