3.5 Ton Ultra Low NOx Single Stage Convertible Natural Gas/Electric Packaged Unit, Volts: 208-230, Hertz: 60, Phase: 1, Refrigerant: R410A, Factory Charge: 103 oz, EER2: 10.6, Department of Energy Guide SEER2 (Range): 13.4, CFM: 1300, BTU Input: 80,000, BTU Output: 64,800, Cooling BTU: 40,000, Heating BTU: 80,000, Overall Dims: 42-1/2''H X 47''W X 51''D, Weight: 523 lbs **Ultra Low NOx Unit is not LP Compatible** ***Unit includes a Manufacture Warranty, register your unit with the Manufacturer for details***