3.5 Ton Single Stage Convertible Natural Gas/Electric Packaged Unit, Volts: 208-230, Hertz: 60, Phase: 1, Refrigerant: R410A, Factory Charge: 7 lbs 8 oz, EER: 11.5, Department of Energy Guide SEER (Range): 14, CFM: 1530, BTU Input: 90,000, BTU Output: 72,000, Cooling BTU: 42,000, Heating BTU: 90,000, Overall Dims: 44-1/16''H X 50-11/16''W X 35-13/16''D, Weight: 497.2 lbs