Thermal balancing - Initial values taken for adjustment

How do I best determine whether I have achieved the minimally possible flow rate in a very short circuit (which according to calculations should already be throttled to 0.3 l/min)? The scaling of the Topmeter with a display range of 0.5 l/min doesn't really help either.

Most likely, I notice it when I detect a temperature difference? But what if the flow rate is so low that no measurable temperature difference occurs anymore?

What would be the intention? You're not saving anything with that. The notes about the probably inaccurate measurements were just a side remark. Because usually it is always a curve that swings back and forth a bit.

It's not about saving for me. We don't find it comfortable to sleep at 20 degrees in the bedroom. The recommended temperature here is rather around 16-18 degrees, if I'm not completely mistaken. 18 degrees would suit me well. We'd rather choose thicker blankets if we get cold but have the feeling of a pleasant coolness.

Of course, what matters to me in this thread is setting the entire heating optimally and efficiently.
If I set the heating curve to 1, all the values in the rooms should go down, or decrease with a stronger drop in outside temperature, correct? That wouldn't be helpful then.

So is it really only left to increase the flow in the bathrooms and reduce it in the bedroom?
The guest bathroom on the ground floor is actually too cold for us as well. In the upstairs bathroom, 20 degrees are always measured, but it feels noticeably warmer than in all other rooms. However, the humidity is not explicitly higher. That always seems strange to us.

Yes, your line of thinking is completely correct. If I were you, I would completely shut off the bedroom and only open the circuit 1-2 times a year to run it for a day or so to ensure the water is replaced and the valve protection is guaranteed.


are the 0.3 still too much?

The toilet has a calculated heating load of 94 watts, hence the 0.3 liters at -12°C, probably just a fart is enough to heat the room along with the lighting.

Then do it as described above. Shut it off completely and only let the water run 1-2 times a year. You can observe whether the room and the surroundings still get warm. If not, you have to look further and possibly adjust the flow even lower, which can also be done with the top meters.

I just looked into my distribution box. To my surprise, the adjustment options are relatively limited. I have attached a picture for you and am writing the values from the picture from left to right.

Bathroom 1.9
Child 1 1.25
Hallway 0.5
Bedroom 0.75
Dressing room 1
Child 2 1.4

The bedroom and the dressing room are basically one room. There is an open passage.
I will reduce the dressing room to 0.75 to test it.

The flow rate to the bathroom is very high. It also feels significantly warmer there. However, it is not measurable. Strange, since the flow rate is twice as high.

Where do I adjust the flow? At the top at the red caps? I saw in a video that water came out there at one point. But it was a different system.