3 Ton 2 Stage Convertible Natural Gas/Electric Packaged Unit, Volts:208-230, Hertz:60, Phase:1, Refrigerant:R-410A, Factory Charge:96 Oz, EER:12.1, Department Of Energy Guide SEER2: 16.4, CFM:1,200, BTU Input:100,000, BTU Output:81,000, Return Dims: 11" X 25", Supply Dims:12" X 17", Overall Dims:40"H X 74"W X 49"D, Operating Weight:572 Lbs, Made In USA ***Unit Includes A Manufacture Warranty, Register Your Unit With The Manufacturer For Details*** **Ultra Low NOx Unit is not LP Compatible**