Hot water tank
In heating technology, a distinction is made between heating water and service water. Heating water circulates only within the heating system and transports thermal energy. Service water is drinking water for kitchen and bathroom use. While instantaneous water heaters are the simplest choice when small quantities of hot service water are required, hot water storage tanks are the ideal solution when households require larger quantities of hot service water.
A hot water storage tank is comparable to a closed container in which there is a pipe coil acting as a heating coil. Drinking water flows around the pipe coil, which contains heating water. The pipe coil now functions as a heat exchanger, transferring the heat to the service water. Inflowing cold water is likewise heated up whenever hot water is drawn. It is important for the hot water tank to have very good insulation to minimise heat loss and maintain a temperature of at least 60 °C to prevent the formation of legionella bacteria.
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