Room Thermostat Uponor T-35 versus "Smarthome Thermostat"

What do you need these for, an old building? Normally you only have to rewire two cables, or am I misunderstanding something? In new buildings these things are useless anyway and always out of order.

Thank you for your answer. No, it is a new building. As far as I can see, it is not that simple for me because this – as far as I understand – is a "two-wire thermostat." As I understand it, the circuit only closes (and switches the valve) when the bimetal closes the circuit.

Normally, you don't adjust the temperature with underfloor heating because it is so sluggish. That's why, in my opinion, a smart control doesn't make sense.

Well, in the long term, the plan would be to get an air conditioner as well. With the smart thermostat mentioned above, I could then run both heating and cooling through one thermostat. And about adjusting it: My girlfriend sees it differently and likes to turn it higher sometimes – even though I agree with you, it does take a while :D

With the smart thermostat mentioned above, I could then run both heating and cooling through one thermostat.

Well, that’s rather not going to work the way you imagine... especially not with the so-called "smart thermostats," meaning not without an overall concept and suitable devices.

That is a damp squib.