SONOFF TRV Gen2 Zigbee Thermostatic Radiator Valve | TRV-ZBT
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【Compact Design】38% smaller than the previous generation, it fits perfectly in space-limited areas with complex piping layouts. The smooth valve adjustment mechanism ensures ultra-low noise operation, even during quiet nighttime hours.
【Crystal-Clear Display】Equipped with a high-resolution IPS color screen, it clearly displays real-time device status, current temperature, and settings. The 4-way rotatable display allows flexible adjustment for different installation directions, keeping information always easy to read.
【Smart Scheduling】Store up to three independent temperature plans, each supporting 7-day weekly scheduling with up to 12 time periods per day. Easily switch between different plans, such as workday, weekend, or holiday modes, to achieve precise and personalized temperature control.
【Smarter Heating】Works with a remote temperature sensor for more accurate room temperature measurement. Connects with door/window sensors to reduce or stop heating when windows are open, helping prevent unnecessary energy waste.
【Comprehensive Protection】Features automatic anti-calcification maintenance, frost protection, low battery alerts, and child lock to prevent scaling, freezing damage, unexpected power loss, and accidental operation.
Technical details, troubleshooting or setup tips? Access the TRV-ZBT knowledge center for all the info you need.
Less Waste,
More Comfort
Zigbee Thermostatic Radiator Valve — TRV Gen2
Compact Design, Great Flexibility
Compared with the previous‑generation model (TRVZB), its volume is reduced by 38%. It easily fits confined spaces for more flexible, clutter‑free installation.
Crystal-Clear Display from 4-Way Angle
Multiple Weekly Heating Plans for Different Lifestyles
Supports 3 independent heating plans and up to 12 temperature periods, automatically adjusting temperatures to match different household routines while balancing comfort and energy efficiency.
Worried about high energy use?
TRV Gen2 saves energy & costs
Temp Drop → Auto‑Stop Heating
Custom Opening, Cut Waste Energy
Heat When Occupied, Off When Empty
Temp Drop → Auto‑Stop Heating
Custom Opening, Cut Waste Energy
Heat When Occupied, Off When Empty
Maintain Comfort with External Sensor
Is there a temperature difference between the room and the area around the radiator? Use SONOFF Zigbee Temp & Humidity Sensor as an external probe for true room-temperature control and precise heating.
Dual Open-Window Detection for Smarter Energy Saving
Supports linkage with SONOFF door/window sensor and automatic window‑opening detection. When a window is opened, heating will be automatically stopped to avoid energy waste from continuous heating.
Historical Data Query
You can view three types of data: target temperature, current temperature and Heating activity. Historical records can be traced back up to six months.
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*Percentage of device heating duration per hour. Example: 30 minutes of heating within one hour equals a heating activity of 50%.
Multi-Protection Design, Use with Peace of Mind
Multiple Practical Functions
Group Control
Boost Mode
Temp Offset
From Fluctuating to Stable
Our PID algorithm flexibly modulates valve openings, delivering both continuous comfort and significant energy savings.
Low‑Noise Thermostatic Valve,
Designed for Quiet Nights
Compatible with Most Heating Manufacturers
Fits existing 'M30 x 1.5mm' radiator valves, and the valve adapters in the package are compatible with most heating systems and manufacturers.
Works with Apple Home Via Matter Bridge
All solutions integrate SONOFF Zigbee devices into your Apple ecosystem via Matter Bridge, enabling seamless interconnected device control.
Easily Integrates with Open-Source Platforms
Built on the Zigbee 3.0 standard, this device effortlessly connects with a wide range of third-party platforms.
To ensure full feature support for TRV-ZBT, please update Zigbee2MQTT to version 2.12.1 or later.
Via ZHA
Important: A pull request (#5234) adding full native support for the Sonoff TRV-ZBT (TRV Gen2) in ZHA has been submitted to the Home Assistant ZHA repository. However, it has not yet been merged by the Home Assistant team. Until the PR is officially merged, some device capabilities may not be available through ZHA out of the box.
If you need complete functionality right away, you can manually configure the device using a script. Please refer to the SONOFF Help Center – TRV-ZBT Setup Note for detailed instructions and the required script. This also applies if you are using Smart.Things.
TRV-ZBT vs. TRVZB
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1.Matter Bridge: Bridge-M, ZBBridge-U, iHost, Cube OS with SONOFF Zigbee Dongle
2.This function requires adding the device to the eWeLink app via the SONOFF Zigbee gateway and syncing it to third-party platforms through cloud-to-cloud integration.
3. Direct access to Alexa/SmartThings ecosystems via dedicated ecosystem gateways.
Zigbee Ecosystem Compatibility
To ensure full feature support for TRV-ZBT, please update Zigbee2MQTT to version 2.12.1 or later.
Via ZHA
Important: A pull request (#5234) adding full native support for the Sonoff TRV-ZBT (TRV Gen2) in ZHA has been submitted to the Home Assistant ZHA repository. However, it has not yet been merged by the Home Assistant team. Until the PR is officially merged, some device capabilities may not be available through ZHA out of the box.
If you need complete functionality right away, you can manually configure the device using a script. Please refer to the SONOFF Help Center – TRV-ZBT Setup Note for detailed instructions and the required script. This also applies if you are using Smart.Things.
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1. Turn on “Switch” to enter Manual Mode; turning it off will enter Anti-Freeze OFF Mode. To switch to Automatic Mode, double-click the device's physical button to change the mode.
2. Note: If connected to HA or other non-eWeLink platforms: Wake device → short-press button → long-press 5s within 3s for BLE pairing. Add to eWeLink via BLE to unlock more features. Data remains intact, third-party connection persists, dual-platform simultaneous access supported.
Specifications
Specs & User Manual
TRV-ZBT is a Zigbee smart thermostatic radiator valve designed for precise temperature control and efficient heating management. Featuring a rotatable IPS color display, customizable schedules, quiet operation, and a compact design, it delivers a smarter heating experience. With real-time device monitoring, multiple temperature plans, and built-in protection features, it ensures comfortable, reliable, and energy-efficient heating for modern smart homes.
User Manual (PDF)Thermo Series
TRV Gen2
Zigbee Thermostatic Radiator Valve
TRV-ZBT
TLSR8258
3V⎓ (2 × 1.5V batteries)
1.5V LR6 alkaline AA batteries
IEEE 802.15.4
M30x1.5mm
5℃-30℃
169 g (with batteries)
-10℃~50℃
5% – 95% RH, non-condensing
White
PC
50×50×82.9mm
10,000 cycles
CE / ROHS
FAQ
1. How to check if my valve is suitable for TRV-ZBT?
Please refer to the following document to check valve compatibility:
2. What is the battery life of the device?
The device uses two AA alkaline batteries with a capacity of 2,000 mAh each. Under normal use, the battery life can last up to 6 months. Actual battery life may vary depending on factors such as valve adjustment frequency, battery quality, ambient temperature, and network stability. Network instability that causes the device to frequently search for a network or attempt to reconnect will increase power consumption.
3. Can rechargeable batteries be used?
AA rechargeable batteries (e.g., nickel-metal hydride) have a voltage of only 1.2V. When two are connected in series, the voltage is slightly higher than the minimum operating voltage of the device, but even fully charged, they cannot maintain long-term use.