66,000 BTU Low NOx Upflow/Horizontal Gas Furnace, Efficiency: 98%, Volts: 120, Hertz: 60, Phase: 1, CFM: 1128, Stage: Modulating, 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: 132 lbs ***Propane Conversion Kit: 68W77 (Not Included)*** ***Unit includes a Manufacture Warranty, register your unit with the Manufacturer for details***