we need more close up picture on the last one. I had a similar thermostats in all rooms and I have replaced it with Moes Wifi (some Zigbee) thermostats. It looks 220v (or high voltage) so be careful and find out what is the default state of the thermostat such as;
normally open: thermostats send signal to close the flow and flow is allowed by default.
normally close: thermostats send signal to open the flow and flow is not allowed by default.
flow means flow of electricity or water for underfloor heating system.
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