SONOFF TRVZB
Smart radiator valve (Zigbee)
Replaces your old radiator knob and heats on a schedule. Control it from your phone; it turns the heat down when a window is open.
Compatibility
ZHA ✓Z2M ✓Alexa ✓Google Home ✓
Best value among Zigbee radiator valves. Needs a Zigbee hub. How we rate
About the product
The SONOFF TRVZB is a smart radiator valve that replaces the ordinary thermostatic head on your radiator. The radiator then heats to a schedule you set on your phone, not to whatever someone turned the knob to.
What it does
- A schedule for every room: warmer in the morning, cooler during the day and at night. Adjustable from 4 to 35 °C.
- Open-window detection: when the temperature drops fast, the valve turns the heat down by itself.
- Frost protection for unheated rooms.
- Runs on three AA batteries, no cable needed.
What you need
The valve talks Zigbee, so it needs a hub: a SONOFF Zigbee bridge (which also adds Alexa and Google Home) or Home Assistant with a Zigbee coordinator. In Home Assistant it works with ZHA and Zigbee2MQTT.
Watch out for
Check that your radiator has the common M30 × 1.5 valve thread. Other valves need an adapter. The head is fairly large, so radiators right next to a wall can be a tight fit.
Who it is for
Anyone who wants to heat only where and when it is needed and cut heating costs without replacing the boiler.
Photos: seller on AliExpress.
Where to buy
-
AliExpress
usually the lowest price, from China, in stock
Go to shop€26.30
price as of 14/11/2026
Links to shops are affiliate links: if you buy through them, we earn a small commission. Your price stays the same.
Price history
Price tracked since 14 November 2026. The chart appears once we have a few weeks of data.
Pros
- +Around €26
- +Works with ZHA and Zigbee2MQTT
- +Schedules and open-window detection
Cons
- −Needs a Zigbee hub (SONOFF bridge or Home Assistant)
- −Bulkier than the new Gen2
Specifications
| Protocol | Zigbee 3.0 |
|---|---|
| Temperature | 4–35 °C |
| Power | 3× AA batteries |
| Hub | SONOFF Zigbee bridge or Home Assistant |