Matter radiator thermostats compared: which valve to buy

A smart radiator valve pays off in the room whose heating does not match how you use it: a bedroom that stays warm through the working day, or a home office that is still cold at nine. All six valves compared here pair directly over Matter and Thread, and all six appear in Apple Home, Google Home, Alexa and SmartThings as a thermostat with a target temperature. That shared tile is the least interesting part of the purchase. Schedules, open-window handling, temperature offsets and any link to the boiler stay with the maker's app or the valve itself (for tink, with your platform), so you are choosing a heating system as much as a valve.

tado X is the valve to buy for most homes

For most European homes, buy the tado Smart Radiator Thermostat X. Its free app stores a heating schedule on each valve, and the valves keep following that schedule when the network drops. The valve has a dial and touchscreen for anyone without the app, a removable USB-C battery pack in place of AA cells, and six valve adapters in the box: Danfoss RA, RAV and RAVL, M28 × 1.5, Caleffi and Giacomini. Only Meross matches that adapter set in this comparison. On tado's current German offer of about €60 (€99.99 list), it costs less per valve than Eve or Bosch, though far more than tink. At list price it would be the most expensive valve here, so buy on offer.

The stronger reason is what happens when tado also controls the boiler. With a tado wall thermostat or receiver running the boiler, each room's valve requests heat on its own, so a cold office can start the heating even when the room with the wall thermostat is already warm. Eve, IKEA, Meross and tink valves can only throttle their own radiator while the boiler follows whatever controls it today. Bosch offers demand-based control for compatible Bosch or Buderus heat pumps through the Bosch Smart Home system.

What tado needs, and what it charges for

The first cost is the Thread connection. tado's app reaches the valves through a Thread border router, and a third-party border router must support a networking feature called NAT64; without it, the valves appear only in the other platform's app (Do I need a Bridge X?). Whether you need tado's own Bridge X depends on your platform:

• Apple Home: a HomePod (2nd generation), HomePod mini or Apple TV 4K (2nd generation, or the 128 GB 3rd generation) does the job, so Bridge X is optional (tado for Apple Home).
• Google Home: tado asks for a Google hub plus Bridge X, a Wireless Receiver X or a Heat Pump Optimizer X, unless you have a Nest Wifi Pro (tado for Google Home).
• Alexa: Amazon's Thread border routers do not support NAT64, so valves added only to Alexa miss tado's firmware and security updates (tado for Alexa). Budget for Bridge X.
• SmartThings, Home Assistant and Homey: tado lists SmartThings hubs and Home Assistant's Connect ZBT-1 and Yellow among usable border routers, but says running its app through another system's border router currently works only with Apple Home and Google Home, so plan on Bridge X here too.

Bridge X costs about €50 on offer, and the starter kit that pairs it with one valve costs about €88, less than the two bought separately (starter kit).

The second cost is the subscription. Open-window detection and its alert are free, but without AI Assist you switch the heating off yourself from a quick action in the app (open-window detection). AI Assist costs €3.99 a month or €29.99 a year (£3.99 or £29.99 in the UK). It turns the heating down automatically when a window opens and adds geofenced away and arrival heating, holiday mode, adaptive heating and flow-temperature optimization for OpenTherm boilers (what AI Assist includes). Free schedules and manual control suit a predictable week. Pay for AI Assist when the household comes and goes at irregular times.

Matter shares only part of what tado does. According to the valve's Matter certification declarations, the valve carries its target temperature, room temperature, heating mode, humidity and, on firmware certified in March 2026, a battery charge level. Schedules, the temperature offset, child lock and the open-window response stay in the tado app, and hot water control is unavailable through Matter. Home Assistant users need its Matter integration, because the older tado integration does not support X devices, and tado does not support Home Assistant itself.

Finally, tado X is sold only in Europe and starts a new system. tado sells in 26 European countries and the UK, with no sales in the US, Canada or Norway, and X devices cannot share a tado home with older V3+ hardware. If a V3+ system already heats your rooms well, replacing it is an expensive way to gain Matter.

Matter gives every valve the same basic controls

Every valve here joins your platform as a Matter thermostat. That device type has no open-window attribute, and the schedules and presets added in Matter 1.4 have barely reached the apps. The heating features worth paying for live in the maker's app, the valve's own menu or your platform's automations.

Open-window handling shows how much stays on the device. Eve, Meross and tink valves turn the heating down themselves when they sense an open window, and so does Bosch's valve in Matter mode; Meross resumes after 30 minutes. tado detects open windows for free but acts on its own only with AI Assist. IKEA documents no open-window feature for LILJEBAGGE. A door and window sensor reacts faster than temperature-drop detection, as tink points out. With tink you link the two in a platform automation; Eve links its Door & Window sensor in the Eve app, which needs an Apple home hub.

What each smart home app shows

All six platforms set the target temperature and show the room temperature of a Matter thermostat: Amazon documents only those two for Alexa. The differences start after that.

Home Assistant is the one platform that adds radiator extras through its Matter integration; it still has no support for Matter schedules. SmartThings' driver treats these valves as heating-only thermostats with no window, schedule or preset handling. Apple covers mode switching for Matter thermostats, Google's Home app sets the set point and changes modes, and Homey lists thermostats among its supported Matter device types; none of them publishes radiator-specific features. tado's Homey app offers mode, target temperature and temperature for the X valve.

Bosch names no platforms and points buyers to each Matter app; the other five makers name Apple Home, Google Home, Alexa and SmartThings. IKEA and tink do not list Home Assistant, and tado X reaches it only through the Matter integration.

Fit, power and price

tado, Eve, Bosch, Meross and tink screw onto the common M30 × 1.5 valve thread; IKEA names no thread size for LILJEBAGGE. Other valve bodies need one of the adapters, so the adapter list decides which valves you can buy for an older or Italian radiator.

Prices were checked in each maker's own store on November 9, 2026. Meross prices its European store in US dollars and warns that local taxes may be added depending on the country. tink charges delivery on orders under €99, so its six-pack ships free while a single valve does not. Battery life figures are maker estimates: tado quotes up to a year per charge, Bosch up to two years, tink about two years, IKEA about 18 months on its own rechargeable cells, and Eve and Meross give none.

When another valve is the better buy

Cheapest per radiator: tink in Germany and Austria

The tink Basics thermostat costs about €23 a valve in the six-pack and about €27 in the three-pack, so three cost roughly what one Eve Thermo does. It has buttons, a display and AA batteries, but no app: schedules come from your platform's automations, and a Thread border router must reach the room. No Matter certification listing carries tink's name for this model yet, although its specifications match Eurotronic's certified Comet Zero Matter. Buy a pack if routines in Apple Home, Google Home, Alexa or SmartThings are enough, and a single only to check the fit on an awkward radiator first.

IKEA homes in Sweden: LILJEBAGGE

At SEK 199, LILJEBAGGE has the lowest single-valve price here, and it pairs directly over Matter, so DIRIGERA is optional unless you want the IKEA Home smart app's scheduled scenes and battery status. IKEA lists it only in Sweden; its German, British, Danish and Dutch sites do not carry it as of November 9, 2026. IKEA names no valve brands for its six adapters and documents no open-window detection, so fit one and let it calibrate before buying more. In a Swedish home that already runs DIRIGERA, it is the obvious first valve. Elsewhere, wait for a local listing.

Apple Home with no account: Eve Thermo

Both tado and Eve work in an Apple home without a brand bridge. Choose Eve Thermo for no account and no subscription: schedules live on the valve, set up in the Eve app, and the valve pauses the heating for an open window by itself, which tado does automatically only with AI Assist. In Apple Home, the separate Eve Thermo Control can measure the room away from the radiator for up to five Eve valves. Eve Thermo costs €79.95, or about €72 a valve in the five-pack, uses AA batteries and ships with only the three Danfoss adapters. Its on-valve schedules are unavailable on Alexa and SmartThings, and Eve does not sell it in the US.

Bosch Smart Home owners: Radiator Thermostat II [+M]

Bosch's valve makes sense where a Bosch Smart Home Controller II already runs the house. Paired to the controller over Zigbee, it keeps Bosch's schedules, window services and heating features, and the controller's Matter bridge shares it with your platform. Paired directly over Matter, its default, it carries only the target temperature, room temperature and battery level. The radio works in one mode at a time, and switching after pairing takes a factory reset. As a plain Matter valve it is the most expensive here at current prices, so buy it for the Bosch system and its rotary control.

A broad adapter kit without tado: Meross MTS155

Meross MTS155 includes the same six adapters as tado and pairs with your platform without a Meross account. Its Bluetooth app holds the heating schedule, calibration, child lock and history, but only from a phone near the valve. Meross's MSH450P gateway is now on sale, yet its compatible-device list does not include MTS155, so do not count on remote app access. At $56.99 before any local taxes it is priced close to tado's offer, takes only 1.5 V alkaline AA cells and has no boiler link. Choose it for one independent radiator with an unusual valve.

US hot-water radiators: none of these

None of these valves is sold in the US. Eve's US store shows Eve Thermo as unavailable, tado does not sell in the US or Canada, Meross does not offer MTS155 in its US market, and IKEA US does not list LILJEBAGGE. North American radiator valves are a separate product line: Danfoss, for example, sells RA2000 valve bodies for US pipework, each needing its own thermostatic head, and none of these makers documents a fit with them. Importing a European valve means no local support and no fit guarantee, so Matterhome has no Matter radiator valve to recommend for a US home today.

Two valves this guide leaves out

Aqara lists the Radiator Thermostat W600 on its European site with Thread and Zigbee, six adapters and AA batteries, but its local schedules and geofencing need Zigbee mode in the Aqara Home app, which makes it a valve for Aqara households. Eurotronic's certified Comet Zero Matter shares tink's specifications and is harder to find in shops. Matterhome has not reviewed either.

Do you need a room thermostat too?

A radiator valve throttles hot water; it cannot start the boiler. Where an old wall thermostat in one room switches the boiler, a smart valve in a cold bedroom can open fully and still get no heat once that wall thermostat is satisfied. That is the job for a tado wall thermostat.

The Wired Smart Thermostat X (2nd gen) replaces a supported wired room thermostat, switches the boiler by relay or OpenTherm, and lets each tado valve request heat for its room. tado calls this its recommended setup. Rooms without a tado valve still get heat whenever the boiler runs. If the boiler has no wired thermostat, tado's wireless kit puts a receiver at the boiler, and the Heat Pump Optimizer X fills the same role for supported heat pumps.

Skip the wall thermostat if you rent or your flat runs on a shared heating supply. tado supports a radiators-only setup in which the valves follow their schedules while the boiler keeps its existing controls, and every other valve here works that way, apart from Bosch's valve with a compatible Bosch or Buderus heat pump.

Before you buy a valve for every radiator

• Start with the radiator whose room bothers you most. Fit one valve, let it calibrate and live with it for a week before ordering packs.
• Check Thread coverage at the radiator. Battery valves rely on a border router or powered Thread device in range; the Thread border router guide covers what counts.
• Expect the valve to read warm. It measures beside the radiator, so plan on an offset or a room sensor such as tado's Wireless Temperature Sensor X or Eve Thermo Control.
• No valve creates heat. When the building's central heating is off, the room stays cold.
• Leave rooms that are already comfortable on a manual valve. A schedule adds little where the routine never changes.