Airstage, AOUH48LMAH1, Outdoor Unit, High Heat System, Series: AOUH, 45500 Btu/hr Nominal, 51000 Btu/hr Heating, 45500 Btu/hr Cooling, 208 to 230 V, 1 ph, 60 Hz Power Source, 590, 820, 1020, 1640 cfm Flow Rate, 8.8 EER, 16.6 SEER, 10 HSPF, R-410A Refrigerant, -5 to 115 deg F Cooling/-15 to 75 deg F Heating, 32, 37,47 dBA Sound Level, 246 ft Maximum Piping Length, 52-1/2 in H x 38-3/16 in W x 14-9/16 in D Dimensions, Import