Hot water circulation

By optimising the hot water circulation system, your energy need can be reduced and the risk of legionella bacteria minimised.

Hot water circulation refers to a certain volume of the building’s domestic hot tap water which is in constant circulation in the building's pipes. As a result, the water does not need to travel all the way from the water heater when you turn on the tap, which reduces the time you spend waiting for your hot water. (The waiting time for hot water is regulated by the Swedish National Board of Housing, Building and Planning and should be a maximum of 10 sec.)

In addition to the increased comfort of waiting less time for hot water, there are other advantages with having an optimised hot water circulation system:

- The risk of legionella bacteria growth is minimised as the minimum permitted temperature in a hot water system is 50°C. Bacteria occur naturally in drinking water, but grow to the contagion risk levels at temperatures of 20-45°C.

- Hot water consumption is reduced as the water does not need to run while you wait for it to reach the required temperature.

QSEC can help you optimise your hot water circulation system, enabling you to be more energy efficient.
We perform the job with our own developed calculation program HCCS, with which we can determine the correct dimensions and settings for your system with great accuracy.

For reference projects, read more here.