SONOFF
SONOFF TRVZB Zigbee Thermostatic Radiator Valve
- Zigbee2MQTT / ZHA
- Local control
- Zigbee
Prices verified September 2026
See more thermostats & heating picks on our Amazon storefront →Our verdict
The budget king for Home Assistant TRVs: around £22 a radiator versus £60+ for the Bosch Radiator Thermostat II, with equally solid Zigbee2MQTT/ZHA support and no hub or cloud dependency. The trade-off is build quality and running costs — three AA batteries typically last only around six months (versus roughly two years on the Bosch), and the plastic body and motor feel noticeably cheaper. Fits M30x1.5mm valves directly, with adapters in the box for Danfoss RA/RAV/RAVL, Caleffi, Giacomini and M28. Best suited to whole-house rollouts on a budget rather than the one or two rooms where you want set-and-forget accuracy.
What can Home Assistant control on the SONOFF TRVZB Zigbee Thermostatic Radiator Valve?
| Control | Type | What it does |
|---|---|---|
| Target temperature | Number (4-35°C) | Set the heating setpoint |
| Mode | Selector (off/auto/heat) | Choose the operating mode |
| Temperature calibration | Number | Offset the valve's own reading against an external room sensor |
| Window detection | Binary sensor | Flags a sudden temperature drop consistent with an open window |
In Auto mode Zigbee2MQTT locks the setpoint UI to a default 16°C, which trips people up expecting a schedule mode — use the local_temperature_calibration entity instead, offsetting the valve's own reading against a separate room sensor so it heats to actual room temperature rather than the radiator-adjacent internal probe (a published HA community blueprint does exactly this). External-sensor selection has also been reported to spontaneously flip between sources, so worth a periodic check if calibration seems to drift.
Specs
| dimensions | 59.4 x 59.4 x 95 mm |
|---|---|
| battery type | 3x AA (LR6) alkaline, not included; ~6 months typical life per SONOFF (shorter than Bosch's ~2 years) |
| zigbee version | Zigbee 3.0 |
| temperature range | 4-35°C setpoint range (rated operating environment -10 to 50°C) |
| valve adapter compatibility | Fits M30x1.5mm valves directly; adapters included for Danfoss RA, RAV, RAVL, Caleffi, Giacomini and M28x1.5mm |
How does the SONOFF TRVZB Zigbee Thermostatic Radiator Valve compare?
| Product | From | Protocol | Local control | Integration |
|---|---|---|---|---|
| SONOFF TRVZB Zigbee Thermostatic Radiator Valve (this product) | £22.3 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Floor Heating Thermostat W500 | £69.98 | Matter, Thread, Zigbee | Yes | Native |
| Aqara Radiator Thermostat E1 | £54.98 | Zigbee | Yes | Zigbee2MQTT / ZHA |
| Aqara Radiator Thermostat W600 | £49.99 | Matter, Thread, Zigbee | Yes | Native |
Frequently asked questions
- Does the SONOFF TRVZB Zigbee Thermostatic Radiator Valve work with Home Assistant locally?
- Yes. The SONOFF TRVZB Zigbee Thermostatic Radiator Valve is controlled locally in Home Assistant through Zigbee2MQTT or ZHA, so it keeps working if your internet connection or the SONOFF cloud goes down. Control and state updates stay on your own network.
- Which protocol does the SONOFF TRVZB Zigbee Thermostatic Radiator Valve use, and do I need a hub?
- The SONOFF TRVZB Zigbee Thermostatic Radiator Valve uses Zigbee. To pair it with Home Assistant you need a Zigbee coordinator (for example a SkyConnect/ZBT-1 or Sonoff dongle) attached to your Home Assistant host. SONOFF's own hub is not required when you integrate through Zigbee2MQTT or ZHA.
- How much does the SONOFF TRVZB Zigbee Thermostatic Radiator Valve cost in the UK?
- The lowest price we have listed for the SONOFF TRVZB Zigbee Thermostatic Radiator Valve is £22.30 at Amazon UK. Prices were last checked in September 2026 and change often, so confirm on the retailer's page before buying.