SONOFF Zigbee Thermostatic Radiator Valve – TRVZB (Zigbee 3.0)
Overview
The SONOFF TRVZB is a Zigbee 3.0 smart thermostatic radiator valve designed to upgrade existing radiators with precise temperature control, energy-saving automation, and full smart-home integration. It supports Home Assistant (via Zigbee2MQTT), voice assistants, and the eWeLink app for remote operation, scheduling, and optimisation of home heating. Shipped quickly and directly from the UK, this product has been tested and verified to work with Home Assistant.
Key Features
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Home Assistant Compatible (Zigbee2MQTT / ZHA)
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Zigbee 3.0 Connectivity for fast, stable, local control
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Open-window detection – automatically closes the valve to reduce heating waste
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Precise Valve Control – adjustable from 0% to 100% in 1% increments
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Smart Automation – scheduling, groups, voice control, and remote management via eWeLink
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Energy Tracking – 6-month historical data for daily/weekly/monthly usage
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Wide Valve Compatibility – fits M30 × 1.5 mm valves + includes adapters for Danfoss RA / RAV / RAVL, Caleffi, Giacomini, M28 × 1.5 mm
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Technical Specifications
| Item | Details |
|---|---|
| Model | TRVZB |
| Connectivity | Zigbee 3.0 |
| App Support | eWeLink |
| Voice Control | Alexa / Google Assistant (via Zigbee hub) |
| Valve Control Range | 0–100% (1% precision) |
| Power | 3 × AA batteries (not included) |
| Operating Use | Radiator heating systems (M30 x 1.5 mm & included adapters) |
| Dimensions | 5.94 × 5.94 × 9.5 cm |
| Weight | 157 g |
| Certifications | CE, RoHS, UKCA |
Installation / Application Notes
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Requires a Zigbee hub such as Sonoff ZBBridge-P, NSPanel Pro, iHost, or a compatible Zigbee coordinator (e.g., Home Assistant with Zigbee2MQTT).
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Install onto existing radiator valves using the supplied adapters if required.
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Batteries must be installed before pairing.
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Open-window detection may temporarily close the valve to reduce energy usage.
In the Box
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SONOFF TRVZB Smart Thermostatic Radiator Valve
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6 Valve Adapters (Danfoss RA / RAV / RAVL, Caleffi, Giacomini, M28 × 1.5 mm)
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User Manual