4 Ton Two Stage Convertible Natural Gas/Electric Packaged Unit, Volts: 460, Hertz: 60, Phase: 3, Refrigerant: R410A, Factory Charge: 144 oz, EER: 13, Department of Energy Guide SEER (Range): 17, CFM: 1992, BTU Input: 70,000, BTU Output: 56,700, Cooling BTU: 48,000, Heating BTU: 70,000, Overall Dims: 43-1/2''H X 74''W X 48-5/16''D, Weight: 647 lbs