The best smart thermostats for UK homes in 2026 are tado° X, tado° V3+, Hive Thermostat, Drayton Wiser, Honeywell Home T6R, Netatmo Smart Modulating Thermostat, Heatmiser neoStat, and Salus iT600 — each suited to a different type of household, boiler, and budget. One model conspicuously absent from the UK market is the Google Nest Learning Thermostat 4th Gen, which launched in the US but was never released here due to incompatibility with UK heating wiring and combi boilers. This guide cuts through the noise, expands on the usual four-way shortlist, and tells you which smart thermostat to buy, and why.
⭐ Best Overall Pick
tado° X
Best balance of features, UK compatibility, and value. Matter over Thread, OpenTherm modulation, and the deepest energy savings on test.
| tado° X | tado° V3+ | Hive Thermostat | Drayton Wiser | Honeywell T6R | Netatmo Smart Modulating | Heatmiser neoStat | Salus iT600 | |
|---|---|---|---|---|---|---|---|---|
| Price (UK) | from £135 | from £160 | from £120 | from £110 | from £160 | from £200 | from £150 | from £30 |
| Monthly fee | Optional, ~£4/mo | Optional, ~£4/mo | ~£3/mo | None | None | None | None | None |
| OpenTherm | Yes | Yes | No | Yes | No | Yes | Yes (with neoHub Mini OT) | No |
| Home Assistant | Local (Matter) | Cloud only | Cloud only | Local API | Local API | Cloud only | Cloud only (legacy core support), HACS for neoHub | HACS community integration only |
| Combi boiler | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Multi-zone | Yes | Yes | No | Yes | No | No | Yes | Yes |
| Best for | Overall / Matter | OpenTherm on a budget | Alexa households | Multi-zone, no sub | Installer reliability | Design / hot water | Wired / pro installs | Budget DIY |
Why bother with a smart thermostat?
UK gas bills remain elevated. Ofgem's energy price cap for a typical dual-fuel household on Direct Debit rose 13% to £1,663 per year from 1 July 2026, with the gas unit rate now around 7.33p per kWh. A smart thermostat that reduces gas consumption by 10–15% delivers a saving of roughly £70–£160 a year at current unit prices — enough to pay back the hardware cost within 12–24 months for most of the models below.
The saving comes from three mechanisms: geofencing (heating turns down automatically when everyone leaves home), OpenTherm modulation (the boiler runs at lower temperatures rather than cycling on and off at full power), and zone-by-zone scheduling (unoccupied bedrooms are kept cooler than living rooms during the day). Not all thermostats support all three — which is why choosing the right one matters, and why we've expanded this guide well beyond the usual four names.
The eight best smart thermostats for UK homes
1. tado° X — Best overall
Price: from around £135, prices vary by retailer. The tado° X is the current top pick for most UK households. It uses Matter over Thread, making it future-proof alongside Apple Home, Google Home, and Amazon Alexa. The wired starter kit includes the thermostat and a Bridge X or compatible Thread border router; a hot-water-control variant is available for homes with a separate cylinder.
tado° X supports OpenTherm modulation, which is where the real efficiency gains come from: the boiler runs at a lower, steadier temperature rather than blasting on and then cutting off. Combined with geofencing — which tracks the location of household smartphones and lowers the heating when the last person leaves — independent testing by BEAMA and Salford University suggests 10–22% gas savings are realistic for UK homes, equivalent to roughly £80–£200 per year at current Ofgem tariffs.
The Auto-Assist subscription (around £4/month) is required to unlock automated geofencing and weather adaptation; the thermostat works as a manual smart scheduler without it. Because it runs on Matter, the tado X also integrates locally with Home Assistant with no cloud dependency — a genuine advantage over most of the rest of this list.
2. tado° V3+ — Best for OpenTherm on a budget
Price: starter kit from around £160, hot-water-control version costs more, prices vary by retailer. The V3+ is tado's established, pre-Matter range, and it remains a genuinely strong choice — particularly if you want OpenTherm modulation without paying tado X prices. It works with combi, system and conventional boilers, wet underfloor heating, and some oil boilers, and is compatible with Alexa, Google Home and Apple HomeKit via the wired Internet Bridge hub.
The trade-off versus the X is connectivity: the V3+ relies on tado's own 868 MHz radio protocol and a cloud-polling Home Assistant integration rather than local Matter control. Since January 2026, tado has applied stricter API rate limits to the free tier, which can cause the official Home Assistant integration to show stale readings during busy periods — the community-maintained Tado CE integration works around this using the Internet Bridge's local HomeKit interface. For a full breakdown of the V3+ versus the X, including radiator-valve options for both ranges, see our tado smart radiator valve review.
3. Hive Thermostat — Best for simplicity
Price: from around £120, prices vary by retailer. Hive is the most widely stocked smart thermostat in the UK, available from Currys, B&Q, and Amazon UK. It is designed specifically for the UK market — British Gas (which owns Hive) offers professional installation packages, and the app is genuinely straightforward to use.
The current Hive Thermostat supports OpenTherm (via the Nano 3 Hub) and is compatible with both combi and system boilers. It also controls hot water in homes with a separate cylinder, which makes it suitable for a wider range of UK properties than some rivals. Geofencing is included without a subscription. Independent testing suggests savings of 8–12%, or roughly £50–£120 a year.
Where Hive falls short is in ecosystem depth: there is no Matter support, and multi-zone room control requires Hive's own TRVs, which are pricier than Drayton Wiser's alternatives. If you want a plug-in-and-forget single-zone thermostat and do not need deep home automation integration, Hive is a very solid choice — particularly if you value having British Gas on the phone if something goes wrong. For a direct side-by-side, see our Hive vs tado UK comparison.
4. Drayton Wiser — Best value for multi-zone
Price: starter kit from around £110, prices vary by retailer; individual TRVs from around £38. If your priority is room-by-room control on a budget, Drayton Wiser is hard to beat. The Zigbee mesh network is robust and temperature accuracy in independent testing was within half a degree of target — better than several pricier rivals. It also supports OpenTherm, so boiler modulation savings are available without paying a subscription.
The Wiser app is less polished than tado's, and there is no Matter support, but the hardware cost for a full multi-zone setup is significantly lower than any competitor on this list. For a three-bed semi where the primary goal is stopping the boiler heating unoccupied bedrooms, Wiser delivers excellent bang per pound. Our full Drayton Wiser review covers installation, app quirks, and Home Assistant setup in detail.
5. Honeywell Home T6R — Best for reliability
Price: from around £160–£200, prices vary by retailer. Honeywell's T6R-HW is the professional installer's favourite — it has a long track record of reliability, an uncluttered physical interface, and integrates with Apple HomeKit, Google Home, and Alexa. It supports OpenTherm and includes hot water control in the HW variant, making it suitable for a wide range of UK boiler types.
The T6R lacks the geofencing polish of tado and Hive, and its app is functional rather than beautiful. But if you want a thermostat that works out of the box, needs minimal configuration, and will still be supported in a decade, the T6R is a dependable pick — particularly popular with heating engineers who install and maintain it professionally.
6. Netatmo Smart Modulating Thermostat — Best design and hot water control
Price: from around £200, prices vary by retailer. Netatmo's Smart Modulating Thermostat is designed specifically for OpenTherm boilers and does one job very well: precise, continuous modulation of boiler flow temperature rather than simple on/off switching. It also controls domestic hot water production on OpenTherm boilers with an integrated cylinder, via its own schedule.
Netatmo has an official Home Assistant integration covering the Smart Thermostat, Smart Modulating Thermostat, and Smart Radiator Valve range, exposed as climate entities — though, like most non-Matter options here, it is cloud-polling rather than local. The thermostat is designed by Philippe Starck and comes in interchangeable colour finishes, which is a genuine point of difference if the hardware needs to sit somewhere visible. It is the priciest single-thermostat option on this list, so it suits buyers who want design and OpenTherm hot-water control together rather than the cheapest way to add modulation.
7. Heatmiser neoStat — Best for wired, professional installs
Price: neoHub Mini OpenTherm kit from around £150, prices vary by retailer. Heatmiser is a long-established UK heating-controls brand, and the neoStat/neoHub range is the one most likely to already be fitted by a heating engineer rather than bought as a DIY upgrade. The neoHub Mini OT bundle pairs a neoAir thermostat with a hub that supports both simple on/off boilers and OpenTherm-enabled ones, and the range supports multi-zone control via additional neoStats.
Home Assistant support needs a careful read here: the core Heatmiser integration only covers Heatmiser's older wired DT/DT-E/PRT/PRT-E thermostats over a local RS232/RS485 connection, and is marked legacy — it does not support neoStat or neoHub. For neoHub-based systems, you need the community-maintained "Heatmiser Neo Integration" via HACS, which talks to the neoHub over your local network using its legacy LAN API. It works well once configured but is not part of Home Assistant core, so factor in a slightly steeper setup than tado or Hive.
8. Salus iT600 — Best budget, DIY Zigbee option
Price: individual thermostats from around £30, prices vary by retailer; a UGE600 universal gateway is required to connect them to Wi-Fi and app control. Salus (a Computime Group brand) sells some of the cheapest genuinely smart thermostats available in the UK. The iT600 range uses Zigbee to connect room thermostats and TRVs back to a UGE600 gateway, which then bridges to the Salus app and voice assistants.
There is no official Home Assistant integration; a community-maintained custom component (available via HACS or manual installation) talks to the UGE600 gateway locally over your network, without depending on Salus's cloud. iT600 devices do not support OpenTherm, so you won't get boiler modulation savings, but for a low-cost, multi-zone Zigbee setup — especially if you already run other Zigbee devices through a compatible gateway — Salus is worth considering as a budget entry point rather than a like-for-like rival to tado or Hive.
What about Google Nest?
UK buyers frequently search for the Google Nest Learning Thermostat, but it is worth knowing that the 4th Gen — released in the US in 2024 — was never made available in the UK. The reason is fundamental: UK thermostats use high-voltage wiring (240 V), while the Nest 4th Gen was designed for North American low-voltage HVAC systems. The earlier 3rd Gen Nest thermostat was sold in the UK and is still available from some retailers. If you are considering picking one up, read our full Nest Learning Thermostat UK review before buying — it covers compatibility, energy savings, and whether the ageing hardware still makes sense in 2026. tado° X is the closest equivalent in terms of learning features and app polish. For a detailed head-to-head on features, prices, and OpenTherm compatibility, see our tado vs Nest UK comparison, or our three-way Hive vs tado vs Nest comparison.
Key questions before you buy
Do you have a combi boiler or a system boiler? All eight thermostats above support combi boilers. If you have a system boiler with a hot water cylinder, make sure you buy the hot-water-control variant of tado° X, tado° V3+, Honeywell T6R-HW, or Netatmo's OpenTherm hot-water setup — or a Hive model that explicitly lists hot water control.
Does your boiler support OpenTherm? Check your boiler's manual, or the OpenTherm Association's compatibility list, before buying a thermostat purely for its modulation feature. tado° X, tado° V3+, Drayton Wiser, Netatmo, and Heatmiser (with the neoHub Mini OT) all support OpenTherm; Hive, Honeywell T6R, and Salus iT600 do not.
Do you want room-by-room control? A single thermostat controls your whole home as one zone. For room-by-room control you need smart TRVs on each radiator, or a multi-zone system such as Wiser, tado, Heatmiser, or Salus. Drayton Wiser is the most cost-effective route; tado° X is the most feature-rich. Our dedicated guide to the best smart radiator valves UK covers every major TRV in depth, with pricing and installation advice.
Do you use Home Assistant? Support varies a lot more once you look past the big four. tado° X is the only thermostat here with genuinely local control, via Matter. tado° V3+, Hive, Honeywell T6R, and Netatmo all have official cloud-based integrations. Heatmiser neoStat and Salus iT600 need a community HACS integration rather than a core one — reliable, but an extra setup step and a dependency on volunteer maintenance. If local control matters to you, our guide to setting up Home Assistant in the UK explains how to get started, and our dedicated guide to Home Assistant heating control covers integration options, OpenTherm gateways, and automations in depth.
Do you want smart home ecosystem integration? tado° X is the only option here that supports Matter natively, which means it will work with Apple Home, Google Home, and Alexa now and in the future without relying on a proprietary bridge. If you are building a wider smart heating setup, that future-proofing is worth paying for. Pair your thermostat with a set of smart bulbs to build whole-home automations that save energy across heating and lighting simultaneously.
Our recommendation
For most UK households, tado° X is the best smart thermostat. It offers the deepest energy savings, the best app, local Matter control, and the strongest ecosystem compatibility. If you want OpenTherm modulation without the X's price tag, tado° V3+ remains an excellent, well-supported alternative. If your priority is simplicity and UK-specific support, Hive is the easiest choice. For multi-zone heating on a budget, Drayton Wiser delivers outstanding value, and for professional-grade reliability, the Honeywell Home T6R remains a long-term favourite among heating engineers. Netatmo is worth a look if design and OpenTherm hot-water control matter more than price; Heatmiser neoStat suits homes where a heating engineer is already specifying wired controls; and Salus iT600 is the pick for a genuinely budget, DIY Zigbee setup.
If you want to take any of the above thermostats further with local automations, presence-based schedules and cross-device triggers, our guide to home assistant heating control explains how to integrate tado, Hive, Netatmo and more into a self-hosted Home Assistant setup.
If you have an air source or ground source heat pump rather than a gas boiler, the picture changes — not all thermostats above are heat pump compatible, and on/off control can hurt heat pump efficiency. See our dedicated guide to smart thermostats for heat pumps in the UK for product-by-product compatibility notes and setup advice.
