66,000 BTU Upflow/Horizontal Gas Furnace, Efficiency: 80%, Volts: 120, Hertz: 60, Phase: 1, CFM: 1335, Stage: Two, Speed: Variable, Motor Type: ECM, BTU Input: 66,000, BTU Output: 52,000, Dimensions: 33''H X 14-1/2''W X 28-3/8''D, Weight: 128 lbs ***Propane Conversion Kit: 11K48 (Not Included)***