Underfloor heating air-water heat pump. House too warm when the sun shines

We are currently at -6 AT, with 28.1 flow and 26.0 return

We are currently at -6 AT, with 28.1 flow temperature and 26.0 return temperature

What kind of impressive heating technology or insulation do you have? Sounds like a log cabin?

What kind of extreme heating technology or insulation do you have? Sounds like a log cabin?

The system will also be designed for 30 degrees supply temperature, with the installation spacing correspondingly tight. That fits. Our heating curve ends at 28 degrees return temperature, which then corresponds to about 30 degrees supply temperature.

We were at around -7°, also about ~29.4° supply temperature, return temperature was 25.4°, concrete house KFW55.

Then you have probably laid many more pipes, we have stuck to the 10cm. That is probably why we have a higher supply temperature, otherwise it is too cold in the house.

What kind of extreme heating technology or insulation do you have? Sounds like a wooden cabin?

KfW55 house, timber frame construction ... wall with installation level, 20cm wood with wood fiber insulation and then another 12cm wood fiber insulation on the outside ...