Hydraulic balancing air-water heat pump + efficiency circulation pump

That is already an extremely high consumption. What was the AT?

I would have expected half that. I mean, only 100 m² are being heated.

This cannot be properly assessed at the moment. I assume the house mass is still heating up. It will become clear tomorrow whether the consumption remains this high. However, the heat quantity meters of the heat pump are often inaccurate. Do you have a warm water circulation? What temperature is your warm water?

Yes, hot water circulation is present but limited to 1x a day for a few minutes. The set hot water temperature is 48°C. Possibly, I can also reduce the hot water cycle from 3 time windows to two time windows... Currently, I cannot make any statement about the heating curve except that the place gets warm. We are just beginning to find out to what extent I can still lower the heating curve and thus the flow temperatures... Tending to have it rather cold here while my wife currently would prefer to open all windows at 21-22°C... Therefore, we will probably end up with RT in the bathroom of 21°-22°C and in the rest of the place 18-20°C... If I want to push it to the extreme, I could still say 20°C in the bathroom via heat pump and everything above that as needed via electric radiator.

Okay, then it is not due to the hot water. Have the temperatures increased in the meantime? For KFW 55, significantly lower consumption values should be achievable. I do think that you can achieve that.

Yes, the temperatures are still rising, the lowest temperature is 20°C in the bathroom and the bedroom, all other rooms have at least 21°C, living room just under 23°C. The question is also how far I can still go down with the flow temperature once the flow rates are properly adjusted. How will it continue tomorrow once the house has stabilized? Lower the heating curve again and then adjust the flow rates? Or the other way around, adjust the flow first and then see how far the curve can be lowered? I would prefer the latter option (if it makes sense), tomorrow I can still tweak/adjust throughout the day because it’s the last day of vacation.

Once it has stabilized, the next step is to lower the heating curve.

Even then, after each change, the waiting time must be observed again. It doesn't go fast at all.

You have to decide which room should serve as the reference.

Usually, it is the bathroom since it combines a small heating surface with higher temperatures.

You lower the heating curve until your reference room drops below its desired temperature, then you raise the heating curve again to the last working value.

Only then do you begin to adjust the flow rate room by room.

Every throttled room affects the other rooms, so again observe the waiting time and check the temperature.

Feel free to continue posting your values here so we can follow along.