The Heating/Cooling Unit warms the contents of one of the two water tanks of the Process Workstation while it cools the contents of the other one. This creates and maintains the temperature differential required for heat transfer experiments. The Heating/Cooling Unit is designed with enough capacity to insure efficient and continuous operation. The typical capacity of the Heating/Cooling Unit is 2 tons, 24000 BTU/hour, or 7 kW.