[sz4kerto]

If we ever sell this (which we don't plan to), I know what to install (it'll be quite good, just not this perfect). I have it in a cupboard (a Siemens Connected Home thermostat system), the downside of that is that the combined UFH+radiator rooms will be less comfortable.

(But still more comfortable than 99% of the houses I've been in.)

I haven't mentioned in the parent comment but as a test I've dismantled the HA system and installed the Siemens system and it works well, just not 'perfectly'.

[rightbyte]

Sounds well thought out. Many seem to forget designing for replacing.

In generall I think all these IoT systems will be a major headache as they age.

My thermostats on the radiators are 45 year old by now. That is kinda the expected service life we are used to.