Pre-set supply temperature for underfloor heating not maintained

Which HP (heat pump)? District heating supplier,

Right, I answered too quickly.

If my supply line is 60 degrees and I turn my thermostat down to 2, then no 60 degrees flow through the radiator either.

No, if the supply line is 60 degrees, then 60 degrees always flow through the pipes. The thermostat does not mix down the temperature. Educate yourself about how radiator thermostats work.

If the supply line at the radiator is 60 degrees, then due to pipe losses you no longer have 60 degrees in the pipes, but maybe only 50 degrees.

Of course, the thermostat then registers these. This reduces the flow rate and your radiator is only 25 or 28 degrees warm.

At the district heating transfer station, there are now 42 degrees instead of 35 degrees. What is supposed to be bad or concerning about that?
The heating in the house can be controlled, either with a thermostat or directly at the transfer station.

But in winter, a higher supply temperature is applied and it is not at the lowest puke limit. Having reserves is never wrong. I don’t see any extra consumption here. And the heat meter does not measure the supply temperature but the flow rate. And I can reduce that if necessary.

If my supply line is 60 degrees and I turn my thermostat down to 2, then no 60 degrees go through the radiator.

If the supply line has 60 degrees at the radiator, then due to pipe losses you no longer have 60 degrees in the pipes, but maybe only 50 degrees.

Just read your own words... If the radiator produces 60 degrees and the water is pumped through the (insulated) pipes, then approximately 60 degrees also reach the thermostats and enter the radiator that way. That the water cools down because heat is given off is indisputable.

Of course, that then is present at the thermostat. That reduces the flow rate and your radiator is only 25 or 28 degrees warm.

Just read the first quote. Supply line 60 degrees, turning down the thermostat = water flows colder through the radiator. No, 60 degrees (or for all I care 58 degrees) warm water always flows into the radiator. If you’re talking nonsense, don’t come back now with how warm the radiator gets. The thermostat controls the flow rate of 60-degree hot water to achieve a desired room temperature. Soon you’ll turn again in the next post and accuse the government with their building regulations that the thermostat simply cannot cool. Or you’ll babble some other nonsense. But what you wrote in post #5 is simply wrong. Nothing more, nothing less.