In my house I have 3 circuits of floor heating elements, each is connected to single phase (230V) 16A fuse and on one of them I have Heatit Z-TRM3 connected via z-wave to my home assistant. Others are manually controlled dumb thermostats.
That thing works, but at least the particular one I got causes a lot of interference to the z-wave network, so I’m a bit hesistant to add any more of those.
Features I must have:
- Option for a floor temperature sensor. Each thermostat has separate pipe going to the floor and the floor sensor is easy enough to replace, but it is a must have option
- Air temperature sensor. 2/3 of the heating elements are in a concrete slab and that means that measured temperature of the slab very slowly affects the air temperature, so I need both. ESP32 or equivalent as a separate sensor might be a decent workaround, but I’d rather have both on a single unit.
- Obviously the 230V 16A capability as that’s what they’re wired on and even if I don’t have 3kW elements on the floor it’s what’s needed to meet the code
- Manual controls on the device itself. Should my raspberry pi running home assistant kick the bucket or some other major issue with the automations happens, I still need an option to control the device. And that’s a strict requirement, no bluetooth apps on the phone or anything, I must have manual buttons or some other way to control the thing without home assistant or any other smart device.
- And addition to previous one: No cloud requirement. Allowing the device to the internet for a setup is fine, but in the long run it must be happy in a isolated network without internet connectivity
For the communication I don’t really care. I currently have only wifi/z-wave as an option, but if there’s something on zigbee which ticks all the boxes I can invest in a usb-dongle or a hub.
Price is obviously a concern, but it’s hard to set any strict boundaries. I won’t throw a 1000€ for a thermostat, but anything even remotely reasonable goes.
What are your suggestions for a situation like this?
Maybe I’m reading your post wrong, but it sounds like you’d just buy a few cheap temp sensors, then use HA automations to read those and take action with the thermostat control to get your desired affect. So everything would work manually, but HA being alive would give you the added benefits of automations. Moe’s makes a bunch of thermostats, and their stuff is warranted and solid (I haven’t had issues at least). Have a look there.
Interesting product line, but I didn’t find thermostat from them which would work as an replacement on the existing dumb thermostat. I could of course switch the thermostat to an contactor and control that via whatever, but I still need the thermostat functionality without any additional connectivity than the device itself, so at least based on a quick glance, I didn’t find a product which would fit my needs.
They multiple that say they work with floor heat: https://moeshouse.com/collections/heating-thermostat
Wifi and Zigbee seem to be the main protocols they use. What are these ones missing?
I missed those on quick browse. They seem to tick all the boxes, but I didn’t find any kind of European standards mentioned, no CE-branding or anything, so due to my insurance those might not be an option. I’ll need to dig a bit deeper on the brand.