Match the thermostat to the system first
Before any brand comparison, three questions decide most of it:
- What's your heat source? A combi or system boiler is straightforward. A heat pump needs a control that respects weather compensation — see smart controls and heat pumps.
- Do you want zoning? Heating individual rooms separately needs smart TRVs, which only some ecosystems support well.
- Which smart-home platform do you use? Compatibility with Alexa, Google Home, or Apple Home is worth checking if you want voice or routines.
The main UK models, honestly
Listed alphabetically — not in order of preference.
- Drayton Wiser — strong, well-priced room-by-room zoning with smart TRVs, no subscription for core features. A common installer choice for multi-zone homes on boilers.
- Google Nest — the learning thermostat; sets schedules automatically from your behaviour, polished app, deep Google Home integration. Less focused on per-room zoning.
- Hive — simple, widely stocked, easy to live with; good for a single-zone boiler and households that want straightforward control rather than deep automation.
- Honeywell Home — reliable, no-nonsense controls with a long pedigree in heating; multi-zone options; favoured where dependability matters more than novelty.
- Tado — strong on geofencing and room-by-room control, good open-window detection, and notably better heat-pump support than most. Some advanced features sit behind an optional paid tier.
Every one of these will deliver the Energy Saving Trust's ~10% controls saving if you use it well. None of them invents savings beyond heating less, less often, in fewer rooms.
What to ignore
Ignore the headline "save up to X%" claims printed on the box — they assume you currently have no controls at all and use the device perfectly. Ignore the colour of the dial. Buy for heat-source compatibility, zoning needs, and whether the free tier does what you want. The rest is decoration.