I am looking for smart home thermostats for my water underfloor heating (230V actuators).
The biggest problem is the form factor: The thermostats must fit into the standard European 55x55 mm grid, as they are to be integrated into my existing Busch-Jaeger frames. Unfortunately, all the clunky 86x86 blocks are completely out of the question. That’s why the Bosch thermostat, which is so often recommended, is also eliminated.
My setup and requirements:
Protocol: Zigbee is preferred (via Zigbee2MQTT), alternatively Thread or Matter. I don’t want to add another protocol (like Homematic IP or Z-Wave) to my setup.
Control: 100% local in Home Assistant, without cloud.
Quality/price: I am looking for a good price-performance ratio. Affordable, but it should be solid, reliable stuff (not unstable no-name junk).
Do you have any other insider tips or experience with devices that fit exactly into the 55 frames and run stably in Home Assistant? I’m really desperate in my search…
Why not have a look at the Z2M supported devices page? Looks like the Danfoss will be perfect for you, though three may be others which are more suitable.
Don’t bother buying any device until you’re sure it’s supported in Z2M. You’ll end up having to write a custom converter, where a different choice would have saved you the hassle.
I use Homematic IP, but they have their own RF protocol ø, so not Zigbee.
Homematic IP is pretty well integrated into HA with RaspberryMaric as a CCU3 Hub emulation in the form of a HA addon/app. You only need a cheap RF stick as hardware to set the central part up.
Their wall thermostats are pretty small.
Those Homematic IP thermostats would be perfect, but I already have a Zigbee stick and a Thread stick, so adding a third RF protocol would be a last resort. But that one:
Looks pretty good. Now I only have to find out the price… I’ll definitely add it to my list. Thanks!
