Eve Thermostat: Smart Wall Thermostat for Underfloor Heating with Matter over Thread
Smart radiator valves are everywhere these days, but wet underfloor heating has mostly been left out when it comes to easy room-by-room control. Eve is closing that gap with the Eve Thermostat, its first wall thermostat built specifically for water-based underfloor heating. The Munich-based company, part of the ABB group for several years now, relies on Matter over Thread: the thermostat runs entirely locally, with no cloud and no account.
One thing up front for readers in the UK: Eve launched the thermostat in Germany, Austria and Switzerland at the end of July 2026. By mid-November 2026 we couldn’t find an official UK launch, Eve’s own online store doesn’t deliver to the UK, and there’s no listing on Amazon UK. More on availability and compatibility below.
Beyond the radiator valve for the first time
Eve first announced the device in December 2025, together with the fifth generation of the Eve Thermo radiator valve. With the Eve Thermostat, the company now covers underfloor heating for the first time. The thermostat measures the room temperature and switches the 230 V electrothermal actuators on the manifold, the small heads that open and close the valves of the individual heating loops.
The idea is precise room-by-room control: a different target temperature for every room, automated with schedules and turned down when nobody’s home.
Silent operation thanks to Triac, with relay outputs on board
By default, the thermostat switches via a Triac, a semiconductor switch with no moving parts. So there’s none of the clicking you know from mechanical relays. Add the dimmable display, which can adapt to the ambient light and switches off automatically after a set time, and the thermostat is a good fit for bedrooms.
For actuators or valves that need a relay, a selector switch gives you potential-free relay outputs (NO, NC, COM). According to Eve, these can also switch higher loads such as pumps or motorised actuators, and you will hear a click in this mode.
Important: only water-based 230 V underfloor heating systems are supported. Electric underfloor heating is not, and Eve doesn’t list boilers or heat pumps as supported either.
Local via Matter and Thread, no cloud
On the wireless side, Eve sticks to its usual approach: Matter over Thread, fully local and cross-platform. The thermostat works with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings and Home Assistant. There’s no Eve cloud, you don’t need an account or registration, and Eve says it doesn’t access, store or process any personal data.
All you need is a hub that acts as a Matter controller and Thread border router, such as a HomePod or an Apple TV 4K. Handy detail: as a mains-powered Full Thread Device, the thermostat acts as a router in the mesh itself and extends the reach of your Thread network.
Schedules are stored on the device. If the internet goes down or your phone is in your suitcase on holiday, the heating simply keeps following the plan.
Schedules and the Eve app: what works where
- Apple Home: on-device schedules are set up in the Eve app for iPhone and iPad.
- Google Home: the new Eve app for Android now supports the thermostat, including on-device schedules. At launch, Android support was still missing.
- Amazon Alexa and Samsung SmartThings: on-device schedules aren’t supported yet. Eve recommends using the time-based automations of those platforms in the meantime.
- Plan for lead times: the thermostat doesn’t learn how quickly a room heats up. Underfloor heating is slow, and Eve suggests allowing around one hour per degree, depending on the system.
- No pairing with other Eve heating products: the Eve Thermostat can’t control an Eve Thermo radiator valve, and it doesn’t work with the external Eve Thermo Control sensor. You can coordinate their schedules, though, for example in a bathroom with underfloor heating and a towel radiator.
Technical details at a glance
- Use: water-based underfloor heating with 230 V electrothermal actuators
- Switching: Triac output (silent, max. 65 mA / 15 W) plus relay outputs (max. 5 A resistive / 2 A motor load)
- Power supply: 100–240 V AC, 50/60 Hz
- Wireless: Thread (2405–2480 MHz), Bluetooth LE for setup; Full Thread Device
- Temperature accuracy: 0.1 °C, hysteresis 0.5 °C
- Protection rating: IP20, ambient temperature 5–35 °C
- Dimensions: 95 × 95 × 20 mm
- Requirements: iPhone or iPad with the latest iOS/iPadOS, or Android 8.1 or later, plus a hub with Matter controller and Thread border router
- In the box: Eve Thermostat, wall mounting plate, screws, Quick Start Guide
Availability, compatibility and alternatives
Eve sells the thermostat in Germany, Austria and Switzerland through its own store, the retailer tink and Amazon. Eve’s online store delivers to a list of European countries, and the UK isn’t one of them. We also couldn’t find the Eve Thermostat on Amazon UK. If you’re in the UK, there’s currently no official way to buy it.
Don’t confuse it with the Eve Thermostat for North America, which Eve presented at CES in January 2026. That’s a separate device for HVAC systems, not for underfloor heating.
Before you buy, check your system. Eve only lists 230 V electrothermal actuators (or loads switched via its relay outputs). If your manifold uses other actuators or a different control setup, the Eve Thermostat isn’t listed as compatible. It’s also a mains-voltage wall thermostat, so leave the wiring to a qualified electrician.
Two more points are worth thinking through. First, room-by-room control means one thermostat per room, and that adds up quickly for a whole house. Second, the competition: Aqara’s Floor Heating Thermostat W500 also supports Matter over Thread (as well as Zigbee), works with electric and water-based underfloor heating with 2-wire normally closed actuators, and is officially sold in the UK. According to Aqara, though, several of its extras, including its smart schedules, require Zigbee mode with an Aqara hub. Eve’s strengths are the silent Triac output and on-device schedules without a hub of its own.
The Eve Thermostat is not available on Amazon UK; for rooms with radiators, you can find a comparable alternative from Eve here:
Last updated on 2026-11-13 / affiliate links / images from the Amazon Product Advertising API. Prices shown may have changed since then. All information without guarantee. * = affiliate link: if you order a product through such a link, we receive a commission from the seller. There are no extra costs for you.
Verdict
With the Eve Thermostat, Eve fills a niche in its range that stayed empty for a surprisingly long time. If you have water-based underfloor heating, run your home on one of the big platforms and want local technology without a subscription, you get a clean solution built on open standards. You can tell there’s an electrical engineering group like ABB behind Eve: a wall thermostat that switches 230 V actuators is closer to the electrical installation than to a smart home gadget.
The main catches are the cost per room and, for UK readers, the lack of official availability. If you only want to make individual rooms smart, it’s a good choice; for a whole house, it gets expensive fast. More options are in our guide to the best smart radiator thermostats.
Disclaimer: All product names, logos and brands mentioned in this article are the property of their respective owners and are used for description and information purposes only. All information is based on official press releases and publicly available sources at the time of publication. No guarantee is given for the accuracy, timeliness or completeness of the information.
Related: Best smart radiator thermostats · Thread border router explained · Matter over Wi-Fi vs Thread
