One way to significantly save on domestic hot water bills is to use a hot water on demand water heater. A conventional hot water system heats water in a tank to a specified temperature. As heat is lost from the tank, the water is reheated until it reaches the specified temperature again. For most of the day and night the water in the tank is not used, but it loses heat continually. Hot water on demand water heaters eliminate this inefficient, costly problem by heating water only as hot water is needed – hot water on demand.
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