ᐅ The temperature inside the rooms does not meet our requirements.

motorradsilke schrieb:

You also have a gas heating system, where it doesn’t matter if it switches on 10 or 20 times a day. Unlike with a heat pump.

Well, that’s not entirely correct. Gas heating systems don’t like short cycling either. Of course, they tolerate it much better than heat pumps, but even for them, there is a limit before premature wear occurs.

Jimy3435 schrieb:

The balancing was done during construction. We only recently took over the house from the previous owner. Unfortunately, there seems to be no documentation of the heating system or it has been lost. Therefore, pipe spacing and lengths are unknown.

Regarding temperatures: in both bathrooms, the temperature is between 22-23 degrees Celsius (72-73°F). Since we actually only use one bathroom, 19-20 degrees Celsius (66-68°F) in the second one would be sufficient. The bedroom (18°C (64°F)) and utility room just under 19°C (66°F) feel too cold for us personally, and we would prefer 20°C (68°F).

You need a thermal balancing, meaning a fine adjustment. A rough balancing has already been done in your case with the hydraulic balancing.

By adjusting the flow rates, your desired temperatures can usually be achieved (make sure to document everything well!). However, be careful to only make minimal adjustments—turn valves in increments of a quarter to a third of a turn at most. Do not start turning valves randomly, as this will disrupt the entire balancing and you will have to start over, and as you described, you lack the documentation on the current settings.

So either hire someone experienced to do this or try it yourself very carefully.

Mycraft schrieb:

So either you hire someone who knows about this or try it yourself carefully.

That’s the problem. Det says that without the exact data, he can only make assumptions for the calculation. If those are incorrect, the temperatures still won’t match afterward.

Of course, it would be nice to have the calculations. But they are not necessary. You can simply increase the flow rate in the rooms that are too cold and decrease it in the rooms that are too warm. Make small adjustments, and every three days check if it’s working (ideally on cloudy days, otherwise solar gains can distort your results). Eventually, you will reach a setting that you are satisfied with.

Jimy3435 schrieb:

That’s the problem. Det said that without the exact data, he can only make assumptions for the calculations. If those are incorrect, the temperatures still won’t match afterward.

You can proceed as WilderSueden described. Simply increase the valve of the room where you need more heat by 1/3 turn and decrease the one where you need less heat by 1/3 turn. This way, you only slightly adjust the hydraulics but will eventually achieve the desired effects. With underfloor heating, nothing changes immediately anyway.

Record everything (temperatures, valve turns) and wait a few days.

Is it generally true that as long as the temperature difference is small, it is better to have a higher flow rate rather than a higher supply temperature?