Is underfloor heating in the basement useful??

Very short circuits create hydraulic short circuits. This eventually makes hydraulic balancing difficult to impossible. But the heating installer doesn't do that anyway...

(almost) all radiators have an adjustable throttle valve in the return flow, which is often mistakenly considered only as a shut-off valve. However, this is exactly meant to enable this flow-control balancing (previously often called modulating)

Is such a throttle valve not common in underfloor heating? Then you would simply close the throttle as much as necessary according to the heat output/flow velocity of the too small "radiator".

Yes, these valves are in the heating circuit distributor. Due to relatively low flow rates, it is quite difficult to set exact flows. And adjusting any valve causes slightly changed flows in the other circuits. In short: fiddly work. The further apart the basic hydraulics of the circuits are now (e.g. one circuit with 160 meters and one with 20), the more difficult it becomes to balance them all together. Especially since the small one has to be set just before "off," which is particularly challenging. It's like trying to adjust an old faucet so that it drips exactly every 10 seconds.

ok thanks

what do you think about the statement that modern underfloor heating systems have become more responsive he says about 3-5 hours

our underfloor heating will have individual room thermostats that automatically turn off when the target temperature is reached and turn on again independently when it falls below

i only knew underfloor heating to be slow about 24-48 hours

Individual room thermostats are rubbish and destroy any hydraulic balancing. If the heating engineer is not capable of refraining from using them, be sure to choose ones that are opened without power and unplug them after commissioning.

The more "responsive" a underfloor heating system is, the worse it is. "Modern" would be thermal activation of the concrete core. So even more mass, even more inertia in the system, even lower flow temperature.

or do the individual room thermostats have something to do with the district heating?

I don’t have any heating where I could set how many degrees it should heat
I hardly know anything about district heating (so far no contact at all) and only barely about underfloor heating

or do the individual room thermostats have something to do with district heating? ...I hardly know anything about district heating

Primary energy district heating, gas heating, oil heating etc. have causally nothing to do with individual room thermostats.

You can attach an individual room thermostat to (almost) every radiator. Just like with a radiator thermostat, sometimes even with BUS connection (also WLAN) to a central building control.

But with a slow floor heating it becomes arbitrarily slow again and thus irrelevant (regarding night setback etc).