Update: unfortunately, my first choice (Z-Wave Fibaro valves) doesn’t have any boiler control relay.
From what I’ve understood lurking their forum, in some countries, boilers are “always on”, keeping the radiator’s water at a fixed temperature; when a radiator valve is opened, the water temperature drops down and the boiler has to warm it.
Is at this kind of setup that they’re thinking of.
But where I live, it’s not legal to have an always-on boiler: you have to turn it on only on demand depending on internal temperature. Furthermore, my boiler would break down if I’d keep it heating water with all valved closed.
I also cannot simply get the rooms current temperature and confront against the valves set value to control the boiler with a remote relay: the valves have a smart behavior to optimize energy saving, so they could close water flow before reaching the set temperature.
I’ve seen I’m not the only one having this concern.
Hell, if they wouldn’t miss just a stupid valves-controlled relay for the boiler, they could sell a lot more devices in many other countries…
I think Netatmo will be the winner…
EDIT: I forgot to mention that Tado has started implementing a subscription policy.
By now it’s only for new users and for some functions already covered by HA or IFTTT (like geofencing), but this is a scaring move to me…