ᐅ The children's bedroom is too warm in the new build.

Created on: 1 Nov 2019 21:59
A
AD1988
Hello everyone,

We have finally been living in our newly built house for two weeks now. We have underfloor heating throughout the entire house and a digital thermostat in every room. All thermostats are set to 21 degrees Celsius (70°F) throughout the house, and everything works fine overall. As soon as the thermostats reach 22 degrees Celsius (72°F), they switch off—except in the children’s room. There, we have noticed that the temperature easily rises to 23 degrees Celsius (73°F) overnight, and the floor remains constantly warm compared to the other rooms.

I have already contacted the company that installed everything for us, but it will probably take some time before I receive a response. As a curious person, I would really like to understand what could be causing this or what the reason might be.

Best regards
J
Joedreck
4 Nov 2019 14:49
How about setting the correct heating curve and performing a hydraulic balancing? This way, you can avoid overheating without even using a room thermostat and can even save on costs.
A
AD1988
4 Nov 2019 14:50
Mottenhausen schrieb:

before you make manual adjustments: try simulating the condition first by setting the room thermostat to 18°C (64°F) or lower. Does anything change at all (in the heating distributor and actually in the room)? It’s also helpful to temporarily hang a good old-fashioned thermometer. Our subjective perception of warmth is unreliable and, for example, can misinterpret a floor covering that feels different to the touch or warm wall colors as "oh, the room is warm."

When I adjust the thermostat, I can see the radiator valve opening and closing. In the room itself, we have a digital room thermostat that displays the measured room temperature.
M
Mottenhausen
4 Nov 2019 14:56
That was the point of my question: a thermostat can also malfunction—measuring incorrectly, controlling inaccurately, or displaying wrong readings.
A
AD1988
11 Nov 2019 11:19
Hello,

please excuse my late reply, but I have spent the past few days checking and testing the room and the manifold.

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

After that, I slightly reduced the flow rate to the children's room. Today, I noticed that the floor in the children's room is relatively cold, although the set temperature is reached. However, it takes much longer now. In the adjacent room, the floor was relatively warm.

Additionally, I observed that the flow rate to the rooms varies depending on how many circuits are currently open. Is this normal? Shouldn't the flow rate remain the same regardless of how many rooms are being heated at the same time?

Regards
J
Joedreck
11 Nov 2019 11:26
Please urgently look into the topic of heating curve, hydraulic balancing, and thermal balancing.

Nowadays, heating is usually on 24/7. The heating curve is adjusted so that the rooms reach the right temperature. The system is balanced to ensure that exactly the right amount of energy reaches 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 wastes money and materials.
A
AD1988
11 Nov 2019 11:41
Joedreck schrieb:

Please urgently familiarize yourself with the heating curve, hydraulic balancing, and thermal balancing.

Nowadays, heating is usually run continuously 24/7. The heating curve is adjusted so that the rooms reach the correct temperature. The system is balanced so that the exact right amount of energy is delivered to each room to keep it warm.

If, in a recent build, the floor becomes noticeably warm, the heating curve is likely set too high. This wastes money and materials.

I have now understood that the floor does not have to be warm. In most parts of our house, the floors are not cold, but not warm either, and the room temperature is comfortable. However, on the upper floor, I am experiencing the issue that the floor in one room is relatively warm.

Actually, these are issues I should address with the company that installed the heating system. However, they took a very long time to complete the installation in the first place. At the moment, I am not getting any feedback from them.