What is the hydraulic balancing of a heating system, who needs it and how much does the balancing cost?

I put a vote on this post on the Facebook page. Perhaps I will now vote more often on the selection of contributions to see which topics are more interesting for the readers. The next votes will then also be carried out in other places, and perhaps also directly here.

After the heating season is the optimal time for maintenance work and optimization of the heating system. Now you still remember the heating season and as a homeowner you may still know the mistakes. One of the ways to optimize the heating is the hydraulic balancing of the heating system. According to the “CO2-online” campaign, an average of 110 euros can be saved annually in a single-family home.

What is hydronic balancing?


In the “My heating can do more” campaign, hydraulic balancing is described as a coordination of the various components of the heating system – from the boiler to the pump to the thermostatic valves – all are set correctly and matched to the building’s requirements. A specialist regulates the amount of heating water for each individual radiator in such a way that only the heat actually required is transported to each radiator. This reduces energy consumption and increases living comfort because annoying flow noise disappears.

The source of the graphic and further information, such as a detailed and clear photo series, is available at

The manufacturer of heating systems Viessmann sent me the following description:

Heating systems regulate the heat supply for each heated room according to the thermal insulation of the building depending on the outside temperature and the corresponding heating curve. In the case of heating systems that are not balanced, the rooms close to the boiler are often overheated. Rooms that are further away often remain cold because they are not sufficiently heated. The system operator therefore increases the speed of the heating circulating pump and at the same time sets the heating curve too high. The result is increased energy consumption, since the increased set values ​​take effect over the entire course of the year.

With the [automatischen] With the Vitoflow hydraulic balancing – which is designed for detached and semi-detached houses – the heat supply is regulated/balanced at every radiator in the heating system. With a well-balanced heating system, all rooms are heated evenly, and at the same time the circulation pump and the heating curve are determined and adjusted to the optimal energy-saving working point.

The heating engineer adjusts the hydraulics of the heating system once during commissioning. The system then always works in an optimal range.

How much does a hydraulic balancing of my heating system cost me?


It is not easy to give a general estimate of the costs of hydraulic balancing. The effort for the skilled tradesman depends on the condition and structure of the heating system, as well as on the number of radiators and the type of valves present. It is also relevant whether there are already pre-installable thermostatic valves and a modern heating pump.

The costs and effort involved in hydraulic balancing are well presented on one page of the “My heating can do more” campaign.

When does my heating need hydraulic balancing?

We already had it in the definition, if radiators that are further away do not get really warm and radiators in the vicinity of the heating system are very hot, the heating system is not hydraulically balanced. Other reasons would be a modernization of the house, such as facade or roof insulation. And when it whistles and rustles in the radiators, then it becomes particularly urgent. Checklists showing when hydraulic balancing is required, who is doing it and whether it was done properly are again included in the “My heating can do more” campaign.

Automatic matching?

When defining the hydraulic balance, the automatic balance from Viessmann was already mentioned. The advantage of automated hydronic balancing is briefly explained in the Viessmann blog. Nothing is said about how it works, nor whether you can get the same result as manually.


If you are now interested in having a hydraulic balance carried out in your house, you can look for heating contractors on a website specially set up for this purpose, in cooperation with the DAA (German Contract Agency).

Related Articles

Leave a Reply

Your email address will not be published. Required fields are marked *

Back to top button