The children's room is too warm in the new building.

How about setting the correct heating curve and performing a hydraulic balancing? This way, you can avoid overheating without a room thermostat and even save costs.

before you manually adjust: simulate the condition first by setting the room thermostat to 18° or less, does anything happen at all (in the radiator manifold and actually in the room?) It is also helpful to temporarily hang up a good-old-fashioned thermometer. Because our subjective perception of warmth is not reliable and for example interprets a tactilely different floor covering or warm wall colors immediately as "oh, but it's warm in that room"

When I set something on the thermostat, I see the radiator valve opening and closing. In the room itself, we have a digital room thermostat that shows the measured room temperature.

that was the point of my question: such a thermostat can also be defective: measuring incorrectly, regulating incorrectly, displaying incorrectly.

Hello,

please excuse my late reply but I had been checking and trying a bit in the room and the distributor over the past few days.

I recently placed an additional thermometer in the room and found that the thermostat is working correctly.

Subsequently, I slightly reduced the flow rate from the children's room. Today I had to notice that the floor in the children's room is relatively cold but the set temperature is reached. However, this now takes significantly longer. In the adjoining room, however, the floor was relatively warm.

Additionally, I noticed that the flow rate of the rooms always varies depending on how many circuits are currently open. Is this normal? Shouldn't it actually always stay the same regardless of how many rooms are heated at the same time?

Regards

Please urgently deal with the topic of heating curve, hydraulic and thermal balancing.

Nowadays, heating is usually on 24/7. The heating curve is set so that the rooms become exactly the right temperature. The system is balanced so that exactly the right amount of energy goes into each room to keep it warm.

If the floor becomes noticeably warm in a current building, the heating curve is probably too high. This costs money and materials.

Please urgently familiarize yourself with the topic of heating curve, hydraulic and thermal balancing. Normally, heating is now done 24/7. The heating curve is set so that the rooms become exactly the right temperature. The system is balanced so that exactly the right amount of energy goes into each room to keep it warm. If, in a current building, the floor becomes noticeably warm, the heating curve is probably set too high. This costs money and material.

I have now understood that the floor does not have to be warm. Basically, in almost every part of our house, the floors are neither ice-cold nor warm, and the room temperature is just right. Only in the upper floor I now have the phenomenon that the floor of one room becomes relatively warm. Actually, these are things I need to address with the company that installed the heating. However, they took forever just to get everything up and running during installation. At the moment, I am also not getting any response from them.