4 Ton 2 Stage Convertible Natural Gas/Electric Packaged Unit, Volts:460, Hertz:60, Phase:3, Refrigerant:R410A, EER:12.1, SEER:14.5, CFM:1600, Efficiency:81.5, BTU Input:, BTU Output:, Supply Dims:16" X 27-1/2", Return Dims:27-3/4" X 18-1/4", Overall Dims:42"H X 59"W X 89"D, Operating Weight:880Lbs, Origin:USA