Help with water based underfloor heating

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Hi all!

Today I have a wireless thermostat controlling my water based underfloor heating. The thermostat runs on batteries and communicates with some kind of device in my basement which in turn controls an actuator which opens or closes a valve on the water circuit. This setup has worked pretty well for me, but, when I installed a bunch of Fibaro Wall Plugs (z-wave) in the same room as the thermostat, I ran into some problems. The wall plug works a bit intermittently, and I can't for the life of me understand why. The z-wave mesh is stable, I've reinstalled stuff multiple times but it still malfunctions sometimes. I suspect it can be because my current wireless thermostat setup works at 868,3 Mhz, and that this frequency interferes with z-wave.

So either I can replace everything z-wave (not an attractive plan) or replace the thermostat setup. The advantage with replacing the thermostat setup is that I can control things remotely and automate it which is a plus.

Now to my question. If I want to replace it, I would like to reuse my actuator. The actuator runs on 24 volt. I'm pretty new on this, but I would like to have a zigbee/z-wave relay-thingy that operates on 230v input but can control my actuator at 24v. I can't seem to find this relay-thingy... I am thinking wrong?

I then would like to buy a z-wave/zigbee room thermostat with the option of having a floor temperature sensor. A requirement is that I need the thermostat to be able to function by itself, so that the WAF is high for this :slight_smile:

Kind regards,

Niklas

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If I got you right, you have a power supply of 24V to operate the actuators. You now need a 230V operated dry relay to control the 24V supply to each actuator. I do not know how many actuators you have but it should be eazy enough to find on Zigbee dry contact switch with more than one output control.
As for the battery operated thermostats, I suggest you look at something like this -
AVATTO Tuya WiFi/ZigBee Smart Thermostat Low Power Battery Water Gas Boiler Temperature Controller,Alexa Google Home Alice - AliExpress

Also, have a look at this post by @kkossev for aditional help with thermostats- [RELEASE] Tuya Wall Mount Thermostat (Water/Electric Floor Heating) Zigbee driver - :gear: Custom Apps and Drivers / Custom Drivers - Hubitat

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