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  • I'm looking at replacing my boiler thermostat. Current thermostat just has one pair of wires going to it like this:

    I'm assuming this is just a switch and, as such, all the smart thermostats that seem to require mains power wouldn't be compatible without extra wiring, I'd need something battery powered? Am I understanding that right? Cheers

  • Nothing stopping you placing the receiver at the boiler end of those wires, where you'll also have a ready source of mains.

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