3.5 Ton Single Stage Convertible Natural Gas/Electric Packaged Unit, Volts: 208-230, Hertz: 60, Phase: 1, Refrigerant: R454B, Factory Charge: 3 lbs 12 oz, EER2: 11, Department of Energy Guide SEER2 (Range): 13.4, CFM: 1581, BTU Input: 90,000, BTU Output: 72,000, Cooling BTU: 40,000, Heating BTU: 90,000, Overall Dims: 49-3/4''H X 51-9/16''W X 44-13/16''D, Weight: 539 lbs ***Unit includes a Manufacture Warranty, register your unit with the Manufacturer for details***