Best radiator thermostat for Home Assistant - Zigbee SONOFF TRVZB, TRV Gen2 and Aqara W600

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Best radiator thermostat for Home Assistant? Quick pick

Good thermostatic radiator valves for Home Assistant are primarily tried-and-tested models that work locally. If you are looking for reliable and popular hardware, choose SONOFF TRVZB. If you care about smaller dimensions and a color display, the newer SONOFF TRV Gen2 will be a better choice. If you plan to use the Thread or Matter standard, Aqara W600 becomes a good option.

All these devices connect directly to your smart home setup, so you do not have to rely on external manufacturer servers. For Zigbee-based models, all you need is a suitable coordinator plugged into your Home Assistant server. This setup ensures stability and full control over heating in every room.

Integration with Home Assistant: ZHA or Zigbee2MQTT?

You can add wireless Zigbee TRVs to the system in two main ways. The first is ZHA, an integration built directly into Home Assistant that is easier to configure right from the start. The second solution is the standalone Zigbee2MQTT application, which very often provides more advanced configuration parameters for a given device.

Regardless of the chosen software, your server must have a physical Zigbee coordinator. This can be a USB stick adapter or a network gateway, such as SONOFF ZBDongle-E, ZBDongle-P, Dongle Plus MG24, or Dongle-M. Before purchasing a specific TRV, it is worth checking the official list of devices supported by Zigbee2MQTT to see how broad the set of currently available features is.

A very important rule during installation is the order of steps. Before you start pairing the device with the network, first mount the TRV directly on the radiator valve. Most radiator valves perform a short calibration during the initial startup.

Fun fact: To put the SONOFF TRVZB into pairing mode, you must first set the temperature on its knob to 0 °C and then press and hold the center button.

Below, we have compiled the recommended TRV models and a dedicated coordinator that you can easily integrate with your system.

Recommended Zigbee radiator thermostats for Home Assistant

Model comparison: SONOFF TRVZB, TRV Gen2, and Aqara W600

The SONOFF TRVZB model is a well-known design that works seamlessly with ZHA and Zigbee2MQTT without requiring a cloud account. This thermostat exposes a heating action entity (HVAC action) to the system, allowing you to precisely control boiler operation based on real heat demand. Starting with firmware version 1.4.4, the manufacturer implemented a PID algorithm that smoothly controls the valve opening degree instead of operating in a simple on/off mode.

The SONOFF TRVZB is equipped with a quiet motor and requires three AA alkaline batteries, which are not included in the box. Such a battery set usually lasts for more than 6 months of operation. The device also has built-in freeze protection mechanisms and child lock features that work regardless of whether your Home Assistant server is currently turned on.

Fun fact: The body of the SONOFF TRV Gen2 model is 38% smaller compared to the older TRVZB version.

The SONOFF TRV Gen2, designated as TRV-ZBT, is a more modern variant that also requires a Zigbee gateway to work. It features a rotatable, color IPS screen, making it easier to read values regardless of the mounting orientation on the radiator. It allows you to configure up to 3 weekly schedules divided into up to 12 periods per day, and can also work directly with an external temperature sensor and a window open sensor. You will also find anti-limescale and frost protection, a button lock, and low battery notifications.

On the other hand, the Aqara W600 is a design unveiled at IFA 2025 and launched in November 2025. Its key highlight is Thread protocol support, allowing it to connect directly to Home Assistant via Matter without an Aqara hub. You can also pair it via classic Zigbee if you have a dedicated hub from this brand and want to use additional features in the Aqara Home app. The device features ultra-quiet operation below 30 dB and runs on two AA batteries for up to 2 years.

Valves, power supply, and home network coverage

The SONOFF TRVZB and Aqara W600 fit directly onto the most common M30 x 1.5 radiator valve thread. SONOFF includes adapters for other popular valves with the TRVZB, while with the Aqara W600 you get RA, RAV, RAVL, Caleffi, Giacomini, and M28 adapters.

Built-in open window detection algorithms respond to sudden room temperature drops and close the water flow. The SONOFF TRV Gen2 can also work with a window sensor and an external temperature sensor, while the Aqara W600 uses a window sensor in Zigbee mode with an Aqara hub.

Communication based on the Zigbee protocol takes place entirely locally within your home network. Lack of internet access or an external connection outage does not affect your heating schedules and rules. In addition, mains-powered Zigbee devices, such as wall plugs or in-wall relays, act as routers that boost signal strength and improve range for battery-powered thermostat valves.

Frequently asked questions about Home Assistant radiator valves

Which Zigbee coordinator is needed for radiator valves in Home Assistant?

To control the valves, a Zigbee coordinator plugged into a USB port or running over the local network is sufficient. Good choices include SONOFF devices such as the ZBDongle-E, ZBDongle-P, Dongle-M model, or the multi-protocol Dongle Plus MG24. You connect your chosen module directly to the server running your Home Assistant instance.

Does the SONOFF TRVZB work with ZHA?

Yes, the SONOFF TRVZB works directly with the built-in ZHA integration. It also runs reliably under Zigbee2MQTT. In both cases, configuration and control are completely local, with no need to register for cloud services.

What is the difference between SONOFF TRV Gen2 and TRVZB?

The Gen2 version features a body that is 38% smaller and a color, rotatable IPS screen that makes reading values easier. It offers support for up to 3 weekly schedules with 12 periods per day. The Gen2 can also link directly with external temperature and window open sensors.

Does the Aqara W600 work with Home Assistant?

Yes, the Aqara W600 valve can easily be integrated into Home Assistant. The device allows connection via Matter thanks to its Thread support, which does not require a dedicated Aqara hub. Alternatively, the valve can operate in a Zigbee network using the manufacturer's official gateway.

Do Zigbee radiator valves work without an internet connection?

Yes, Zigbee communication takes place completely locally between the coordinator and the valves on your radiators. Even during a complete internet outage, your Home Assistant automations will work properly. What is more, freeze protection features on the valves continue to operate reliably even if the Home Assistant server itself is powered down.

Sources

• SONOFF: Home Assistant Zigbee thermostatic radiator valve guide 2026 - manufacturer page (sonoff.tech)
• SONOFF: TRV Gen2 Zigbee thermostatic radiator valve (TRV-ZBT) - manufacturer page (sonoff.tech)
• Aqara: Radiator Thermostat W600 - manufacturer page (aqara.com)
• Home Assistant: Zigbee Home Automation (ZHA) - manufacturer page (home-assistant.io)
• Zigbee2MQTT: SONOFF TRVZB - industry article (zigbee2mqtt.io)
• HomeKit News: Aqara launches Thread/Zigbee radiator thermostat W600 - industry article (homekitnews.com)
• Vesternet: Zigbee Aqara Radiator Thermostat W600 vs Z-Wave Plus Eurotronic Comet - industry article (vesternet.com)