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

xMisterDx schrieb:

How can an individual room temperature be controlled if all thermostats are turned fully up and regulation is done only via the supply temperature?

This is achieved by adjusting the flow rate (and a supply temperature adapted to the outdoor temperature) to deliver more or less energy to the respective room. Regulation through the thermostat only works properly with radiators and high-temperature systems. A modern underfloor heating system is far too slow for this.
It's basic physics.

ypg schrieb:

I've been reading that for 10 years now.
We manage these systems well; they are individually set for the bathroom (normal), bedroom (cool), and living area (warm), and it works like that.
About two to three times a year, the requirements change (difference of 0°C (32°F) / 8°C (46°F) / -8°C (18°F)), then adjustments are made based on experience, and that’s it.

You also have a gas heating system that doesn’t mind whether it turns on 10 or 20 times a day, unlike the heat pump.

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.

Ah, okay. I didn’t know that.
What kind of system does the original poster have? It’s not mentioned anywhere…

ypg schrieb:

Ah, okay. I didn’t know that.
What’s the original poster’s situation? It’s not mentioned anywhere…

We have installed a gas heating system.

The fact is that everything should already be properly preset. However, if the outside temperature is only around 8°C (46°F), the sensor might not register it as cold enough. You can tell because the heating barely turns on. Then we turn the heating dial up by one level, and it starts working. Throughout the entire heating season, as mentioned before, with fluctuating temperatures, the rooms are individually adjusted via the thermostats. Naturally, the effect of the underfloor heating is only noticeable the next day. Even with doors left open, you can feel the differences.

xMisterDx schrieb:

How is it supposed to be possible to set individual room temperatures if all thermostats are turned all the way up and control is only done via the supply temperature?

This works quite well. Of course, only within a range of 2-3°C (4-5°F) in modern buildings. The larger the possible temperature difference, the less airtight the corresponding house is.