Smart Home Assistant
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Thermostats & heating that work with Home Assistant

UK smart heating is its own world — combi boilers, S-plan zones and TRVs on every radiator — and Home Assistant support varies wildly, from fully local Matter thermostats to cloud integrations that lag by a minute. Every thermostat and radiator valve here is verified against UK heating systems, with honest notes on which integrations are local, which poll a cloud, and what that means for your automations.

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Frequently asked questions

What's the best smart thermostat for Home Assistant in the UK?

For most UK homes it's the tado° Smart Thermostat X: it joins Home Assistant locally over Matter/Thread, needs no subscription, and handles combi and heat-pump systems. If you want whole-house zoning on a budget, Drayton Wiser's local API (via a HACS integration) is the enthusiast favourite.

Can I control my radiators individually with Home Assistant?

Yes — smart TRVs (thermostatic radiator valves) replace your existing valve heads and give per-radiator scheduling. Zigbee models like the Sonoff TRVZB (~£25) and Bosch Radiator Thermostat II pair straight into Zigbee2MQTT or ZHA with no extra hub, and Home Assistant's Better Thermostat community integration can combine them with a room sensor.

Do smart thermostats work with UK combi boilers?

Almost all of them — they replace or piggyback your existing room stat using standard 230V switched-live or OpenTherm wiring. Check whether the kit includes a wireless receiver (needed if your current stat is wireless) and whether your boiler supports OpenTherm for modulating control, which tado° and Wiser both offer.