Nominal Capacity - 1.5 to 5 Tons Optional Electric Heat - 5 to 20 kW CB A 25 UH - 030 - 230 - 10 Unit Type CB = Air Handler Refrigerant Type A = Aluminum Coil/R-410A Series Nominal Cooling Capacity 018 = 1.5 tons 024 = 2 tons 030 = 2.5 tons 036 = 3 tons 042 = 3.5 tons 048 = 4 tons 060 = 5 tons Minor Revision Number Voltage 230 = 208/230V-1