SONOFF TRVZB Zigbee Thermostatic Radiator Valve

Quick verdict

One of the cheapest ways to add per-radiator smart heating to a local-first setup. It joins ZHA or Zigbee2MQTT directly - no SONOFF hub or cloud - and exposes setpoint, open-window detection, child lock, frost protection and a weekly schedule. Pair it with an external temperature sensor for far better room accuracy than the built-in valve sensor.

Standout: A budget Zigbee radiator valve that pairs to any Zigbee 3.0 coordinator, exposing direct valve-position control plus an external-temperature input.

Notes last checked Jun 7, 2026.

Compatibility snapshot

Why it stands out

• Excellent local control via ZHA or Zigbee2MQTT with no cloud dependency
• Very low cost; pairs to any generic Zigbee 3.0 coordinator
• Rich controls: setpoint 4-35C, open-window detection, child lock, frost protection, external temperature input

Reasons to hesitate

• Needs 3x AA batteries (not included)
• No native Matter or Thread
• Some users report occasional command lag over Zigbee

Best for

• Local-first households with hydronic radiators wanting cheap per-room heating control
• ZHA / Zigbee2MQTT users who already run a Zigbee coordinator

Avoid if

• You have forced-air or electric baseboard heat (this is a hydronic radiator valve)
• You want a hub-free Matter device

Privacy and local-control notes

Pairs to a local Zigbee coordinator via ZHA or Zigbee2MQTT with no SONOFF/eWeLink cloud. All control stays on your LAN.

Home Assistant support: supported · integration path: ZHA or Zigbee2MQTT (local).

Buying reality check

Price notes: Around $35-$45. Takes 3x AA batteries (not included), good for roughly 6+ months.

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