SONOFF TRVZB Zigbee Smart Thermostatic Valve - Open Window Detection - Scheduling

Heating an empty room or leaving the radiator on with the window open: two habits that unnecessarily inflate your heating bill. The SONOFF TRVZB installs on your existing radiator valve in less than 5 minutes and gives you precise, room-by-room control from your smartphone or home automation system.

Key features

🌡️ Room-by-room control

Set a different temperature for each radiator in the house. 22°C in the living room, 18°C in the bedrooms at night: each room follows its own schedule independently.

🪟 Open window detection

When the temperature drops sharply – an open window – the valve automatically shuts off the radiator to avoid unnecessary heating. It restarts as soon as the window is closed.

📅 Weekly scheduling

Configure temperature ranges by hour and day directly in the eWeLink app or from Home Assistant. Heating automatically adapts to your lifestyle.

🔧 Universal installation in 5 minutes

Compatible with standard M30x1.5 mm thread. The kit includes 6 adapters (RA, RAV, RAVL, CAL, GIA, M28) covering almost all valve brands on the market - Heimeier, Danfoss, Honeywell, Oventrop, Giacomini...

Technical specifications

Box contents

• 1x TRVZB Thermostatic Valve
• 6x Connection adapters (RA, RAV, RAVL, CAL, GIA, M28x1.5)
• 1x Multilingual Quick Start Guide

⚠️ AA batteries are not supplied - please provide 3x AA LR6 1.5V batteries before installation. A compatible Zigbee hub is mandatory to access scheduling, automations and remote control. For manual use only (without a hub), the valve functions as a classic thermostatic head.

Protocol Compatibility Table

Ecosystem Compatibility Table

💡 Our recommendation: With Home Assistant, combine the TRVZB with the SONOFF SNZB-02P temperature sensor placed in the room - away from the radiator. HA will use the external sensor's measurement as a regulation reference rather than the valve's internal sensor, which is exposed to the radiator's heat. The result: significantly greater accuracy and real savings. Please note that the head makes a slight mechanical noise during adjustment - keep this in mind if installing it in a bedroom.