What flow temperatures are you currently running?

Just out of interest to understand the course / or the slope of the heating curve, which supply temperatures do you run, let's say at: 0°C outside temperature at what room temperature and insulation standard with underfloor heating-heat pump combination?

Background of the question:

My logic tells me if I want, for example, 22°C room temperature, I must have at least a supply temperature of 22°C or more, so a temperature difference, because I learned once that there must be a temperature difference for heat transfer to take place?

So if my heating now switches on at 12°C outside temperature, according to my logic the supply temperature should start somewhere at 22°C - 25°C? Accordingly, at only 5°C outside temperature already somewhere around 27°C, and at 0°C going towards 30°C.

Now the design goes according to location and outside temperature down to -12°C outside temperature, if at 0°C I would already run 30°C supply temperature (according to my logic), the supply temperature should be somewhere around 40°C at -12°C? But all designs for underfloor heating are always/mostly based on a max. of 35°C supply temperature for heat pumps.

Of course, the insulation of the house and the room temperatures still play a role. Or is the increase of the supply temperatures so flat that they only rise by 0.5-1°C at outside temperature jumps in steps of 0-5°C?

Or is the increase of the flow temperatures so flat that they only rise by 0.5-1°C with outdoor temperature jumps of 0-5°C steps?

You identified the heating curve with 0.1 last winter. A look in the manual answers the question. Some heat pumps also show directly on the display which flow temperature is delivered at which outdoor temperature.

For the heat pump to run efficiently, the required volume flow must be achieved. Show the heating circuit valve with the flow rates. What are the calculated flow rates? Are ERRs now deactivated?

Please provide more data about your setup.

my logic tells me that if I want, for example, 22°C room temperature, I must have at least a flow temperature of 22°C or more, so a temperature difference, because I learned that there must be a temperature difference for heat transfer to take place?

Absolutely correct.

So if my heating now switches on at 12°C outside temperature, according to my logic my flow temperature should start somewhere between 22°C and 25°C? Accordingly, at only 5°C outside temperature it should already be somewhere around 27°C, and at 0°C move towards 30°C.

How exactly you arrive at this curve/progression is not clear to me.

It could just as well be at 12°C outside temperature with 23°C flow and then at 0°C outside temperature with 24°C flow.
Or anything else really. ;-)

And now you are only asking about flow temperature at which outside temperature and insulation standard.
But at least pipe spacing, floor coverings, flow rate, circuit length, solar (and other) gains also come into play.

Yes, last winter (was the first winter in the house) I already tried to roughly preset. Since then the bypass valve has still been turned off, actuator permanently open via arau thermostat (except for the utility room which is already warm enough due to the photovoltaic inverter and HKV).

Currently, I have increased the curve to 0.15 and raised the base point via the desired temperature to 22°C (if that’s what it’s called). Volume flow according to the heat pump currently around 500 liters. All rooms around 21°C. Guest and bedroom I could throttle further because they can definitely be cooler, but it makes no sense because the bathroom is in between, which then heats the two rooms as well.

Are the actuators on a separate circuit? If yes, you can dismantle them and remove the fuse. That way you save electricity.

Volume flow according to the heat pump currently around 500 liters.

Please sum up all the values on the HKV! Except for Bath+W/E almost everything is "choked off". I don't see more than 5 l/min —> 300 there. There's that "great" buffer tank involved again. What values does the heating curve (flow temperature) deliver with the current settings?