Eve Thermostat Review: Matter-over-Thread Control for Water-Based Underfloor Heating
The Eve Thermostat is a wall thermostat built specifically for water-based underfloor heating driven by low-power 230 V electrothermal actuators. It switches them silently through a Triac output, can also drive pumps or motorised actuators through potential-free relay outputs, and joins a smart home over Matter and Thread with no cloud account and no subscription. It is the natural pick for European hydronic underfloor heating, but it needs a Matter controller and a Thread border router for its smart features and it does not work with electric heating mats or standard forced-air HVAC.
- Water-based underfloor heating
- Apple Home and Matter households
- Privacy-focused buyers
- No-subscription seekers
Pros
- Purpose-built for water-based 230 V underfloor heating
- Silent Triac switching, with potential-free relay outputs for pumps and motorised actuators
- Matter over Thread with no vendor cloud, no account and no subscription
- Works with Apple Home, Google Home, Amazon Alexa, Samsung SmartThings and Home Assistant
- Dimmable LED display with touch controls and automatic ambient-light adjustment
- Schedules stored on the device keep running without a phone or internet connection
Cons
- Only supports water-based 230 V underfloor heating, not electric mats or forced-air HVAC
- Requires a Matter controller and Thread border router for the smart features
- No Wi-Fi and no support for external temperature sensors
- Weight, screen size and screen resolution are not published by the manufacturer
- On-device schedules are currently unavailable on Amazon Alexa and Samsung SmartThings
Who is the Eve Thermostat for?
The Eve Thermostat is aimed at homes heated by water-based underfloor heating, where a wall unit opens and closes the electrothermal 230 V actuators in the manifold. It is a fit for European new builds and renovations that already have, or plan to add, a Matter controller with Thread border router, such as an Apple TV, HomePod or a recent Nest Hub. Households that want heating control without a vendor cloud, an account or a recurring fee are the core audience, and it pairs naturally with the rest of Eve's Thread line for range.
What the Eve Thermostat offers
The standout hardware choice is the silent Triac output, which switches the underfloor heating without the clicking of a mechanical relay, so it can sit in a bedroom. For systems that need it, potential-free relay outputs (NO, NC and COM) can drive higher loads such as pumps or motorised actuators. Communication is Matter over Thread, and the manufacturer lists Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant as supported platforms. Everything runs locally with no Eve cloud and no subscription, schedules are stored on the device, and the dimmable LED display has touch controls plus automatic ambient-light adjustment. A full Thread Device in a mains-powered device also reinforces the Thread mesh rather than only joining it.
What to know before you buy
This is a purpose-built hydronic controller: it supports only water-based 230 V underfloor heating switched through a Triac element or a classic relay, so electric heating mats and forced-air HVAC systems are out of scope. The smart features depend on a Matter controller with Thread border router; without one, only local on-device control remains. There is no Wi-Fi and, per the manufacturer, no external temperature sensor support, so the reading comes from the integrated sensor. On-device schedules are currently not supported on Amazon Alexa or Samsung SmartThings, where the platform apps handle time-based automations instead. The manufacturer does not publish the weight, the screen size or the screen resolution.
Is the Eve Thermostat worth it?
For a house with water-based underfloor heating, the Eve Thermostat fills a gap that few Matter products address: an in-wall controller for the manifold rather than a radiator valve. Its value comes from being purpose-built, silent, fully local and subscription-free, while still working across the major ecosystems over Matter. The trade-off is that it is not a general-purpose thermostat: it will not control electric mats, boilers or heat pumps, and it needs a Thread border router to be more than a local wall unit. If those conditions match the home, it is a strong match; if not, a different thermostat is the right choice.
Frequently asked questions
What kind of heating does the Eve Thermostat control?
It is designed for water-based underfloor heating with low-power 230 V electrothermal actuators, switched by default through a Triac output. Potential-free relay outputs can also drive pumps or motorised actuators.
Does the Eve Thermostat need a hub?
Basic control works on the device itself. For app, voice and automation features it needs a Matter controller with Thread border router functionality, such as an Apple TV, a HomePod or a compatible Nest Hub.
Does it work with Apple Home, Alexa and Google Home?
Yes. It is a Matter device, and Eve lists Google Home, Amazon Alexa, Apple Home, Samsung SmartThings and Home Assistant among the supported platforms.
Is there a subscription or a cloud account?
No. The thermostat runs entirely locally, has no Eve cloud and needs no registration, and all features are available without a subscription.
Can the Eve Thermostat control a boiler or a heat pump?
No. Only water-based 230 V underfloor heating systems switched via a Triac element or a classic relay are supported.
What is included in the box?
The Eve Thermostat, a wall mounting plate, mounting screws and a quick start guide.


