Sonoff · TRVZB

Sonoff TRVZB Smart Zigbee Thermostatic Radiator Valve

Name: Sonoff TRVZB Smart Zigbee Thermostatic Radiator Valve
Brand: Sonoff
SKU: SONOFF-TRVZB
Price: 899 MDL
Availability: InStock

899 MDL3 left

Radiator thermostat valves

Zigbee

Manufacturer images

899 MDL3 left

What it needs to work

A compatible hub is required.

Suitable gateways and hubs

Buy with installation

Check compatibility

Connectivity: Zigbee
Batteries or battery: 3 × AA (LR6, 1.5 V alkaline)

Sonoff TRVZB smart Zigbee 3.0 radiator valve with heating schedules, open-window detection, child lock and frost protection, controlled via eWeLink and Home Assistant.

Hubs and systems: compatibility and limitations 15

SONOFF ZBBridgeConditional
Connection: Zigbee / eWeLink
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · History record
Unsupported functions: Manual temperature adjustment · Temperature calibration · Local scene · OTA
SONOFF ZBBridge-PSupported
Connection: Zigbee / eWeLink
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment · Temperature calibration · History record · Local scene · OTA
SONOFF ZBBridge-USupported
Connection: Zigbee / eWeLink
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment · Temperature calibration · History record · Local scene · OTA
SONOFF NSPanel ProSupported
Connection: Zigbee / eWeLink
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment · Temperature calibration · History record · Local scene · OTA
SONOFF iHostSupported
Connection: Zigbee / eWeLink
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment · Temperature calibration · History record · Local scene · OTA
Home Assistant (ZHA)Conditional
Connection: ZHA
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · History record · Local scene · OTA
Unsupported functions: Manual temperature adjustment · Temperature calibration
Home Assistant (Zigbee2MQTT)Supported
Connection: Zigbee2MQTT
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment · Temperature calibration · History record · Local scene · OTA
Amazon Echo Plus (2nd gen)Conditional
Connection: Zigbee / Alexa
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment
Unsupported functions: Temperature calibration · History record · Local scene · OTA
Amazon Echo (4th gen)Conditional
Connection: Zigbee / Alexa
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment
Unsupported functions: Temperature calibration · History record · Local scene · OTA
Amazon Echo Show (2nd gen)Conditional
Connection: Zigbee / Alexa
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · Manual temperature adjustment
Unsupported functions: Temperature calibration · History record · Local scene · OTA
Samsung SmartThings Hub V3Conditional
Connection: Zigbee / SmartThings
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · History record · Local scene
Unsupported functions: Manual temperature adjustment · Temperature calibration · OTA
Aeotec Smart Home Hub V3Conditional
Connection: Zigbee / SmartThings
The manufacturer lists this hub / connection method. Features depend on the integration and firmware; see the manufacturer matrix.
Supported functions: Operation mode · History record · Local scene
Unsupported functions: Manual temperature adjustment · Temperature calibration · OTA
Philips HueNot supported
Connection: Zigbee
This manufacturer manual explicitly states no support.
IKEA gatewayNot supported
Connection: Zigbee
This manufacturer manual explicitly states no support.
FRITZ!Box Zigbee gatewayNot supported
Connection: Zigbee
This manufacturer manual explicitly states no support.

31 specifications from manufacturer documents

We deliver across Moldova. Availability, delivery timing and cost are confirmed with a manager before order fulfilment.

The right choice starts with specifications

Device passport

SKU: SONOFF-TRVZB

Specifications checked against the linked manufacturer documents.Checked 18 October 2026

Connectivity and compatibility7

Connectivity — what it means The wireless link or network the device uses. Wi-Fi connects straight to the router; Zigbee, Thread and Bluetooth Mesh work through a hub or gateway.	ZigbeeZigbee 3.0 (IEEE 802.15.4, 2405–2480 MHz) [1]
Hub required — what it means Whether the device needs a separate hub, gateway or coordinator to work in a smart home. If so, it is sold separately unless stated otherwise.	Hub requiredA Zigbee 3.0 gateway is needed: the maker recommends SONOFF ZBBridge-P, ZBBridge-U, NSPanel Pro, iHost; ZBDongle-P/-E and other Zigbee 3.0 hubs also work. Philips Hue, IKEA and FRITZ!Box gateways are not supported [1]
Matter support — what it means Whether the device supports the Matter standard, directly or through a bridge. Matter lets you add it to Apple Home, Google Home, Alexa and Home Assistant.	Via a bridge (hub)Into Apple Home via a Matter bridge: the SONOFF ZBBridge-U hardware or the eWeLink CUBE software bridge [1]
Home Assistant — what it means How the device connects to Home Assistant: a built-in integration, a Zigbee coordinator, Matter or the maker’s cloud integration.	Via a Zigbee coordinator or hubThrough a Zigbee coordinator (e.g. ZBDongle-P/-E): Zigbee2MQTT exposes all functions; ZHA lacks manual setpoint and calibration in older versions, and external-sensor control needs the maker's script [1]
App — what it means The maker’s app used to set up and control the device.	eWeLink [1]
Processor / radio chip — what it means The microcontroller or radio module inside, per the maker (for example ESP32). For firmware such as WLED and ESPHome it determines available features and whether the device can be re-flashed.	Silicon Labs EFR32MG22C224F512GN32 [3]
Radio frequencies and transmit power	Zigbee 2405–2480 MHz, ≤ 10 dBm [3]

Housing and installation6

Valve connection thread — what it means The head's native thread for the radiator's thermostatic valve. M30 × 1.5 is the most common standard; Danfoss and some other valves need an adapter.	M30 × 1.5 [1]
Adapters included — what it means Which valve types have adapters in the box. The brand is usually stamped on the radiator valve body; if it is not in the list, the adapter is bought separately.	Danfoss RA, Danfoss RAV, Danfoss RAVL, Caleffi, Giacomini, Herz M28 × 1.5, Comap M28 × 1.5The box has 6 adapters: RA, RAV, RAVL (Danfoss), CAL (Caleffi, Emmeti), GIA (Giacomini, Roca) and M28 × 1.5 (Herz, Comap/SAR, Oventrop Uni LA, Honeywell, MMA, Siemens, TA, etc.). The full valve list is in the official compatibility guide [2]
Dimensions (W × H × D) — what it means The device’s size in millimetres as the maker states it. Check that it fits the wall box, niche or shelf.	59.4 × 59.4 × 95 mmThe knowledge base says 58.4 × 58.4 × 94 mm. 95 mm is the length including the nut [2]
Weight — what it means The device’s weight without packaging, per the maker.	154 g [2]
Housing material	Polycarbonate (PC) [1]
Certifications — what it means Standards and certifications the maker lists for this model (for example CE, RoHS, Zigbee 3.0, Matter).	CE, RoHS [3]

Power4

Batteries or battery — what it means Which cells it takes and how many. A built-in rechargeable battery is stated in the value.	3 × AA (LR6, 1.5 V alkaline)Batteries are not included. The maker advises against 1.2 V NiMH rechargeables: their voltage does not last long [1]
Battery life — what it means Typical life on one set of batteries or one charge, per the maker. Frequent triggers, cold and a weak signal shorten it.	6 months“More than six months” on ordinary batteries; depends on battery capacity and conditions, and drains faster in the cold [1]
Power source — what it means Where the device gets its power: 230 V mains, an adapter, USB, batteries or a built-in battery.	Batteries [1]
Supply voltage — what it means The supply voltage (and current, if stated) as the maker gives it. It must match your mains or adapter.	4.5 V ⎓ (3 × 1.5 V AA) [1]

Measurement and detection2

External sensor support — what it means Whether the head can regulate by a separate room sensor rather than its own sensor next to the hot radiator. This keeps the temperature more accurate where people actually are; it usually needs a compatible sensor and a hub.	YesIn eWeLink, with ZBBridge-P, ZBBridge-U or Bridge-M, SONOFF SNZB-02, -02D, -02P, -02DR2, -02WD, -02LD, -02B, -02M or -02UL can be chosen as the external sensor. In Home Assistant (ZHA) this needs the maker's script [2]
Sensor calibration — what it means How many degrees the built-in sensor reading can be offset by hand if it reads higher or lower than a room thermometer, e.g. −9…+9 °C.	−7 °C±7 °C is what the maker states for Home Assistant (ZHA 2024.3 or later). The eWeLink range is not stated; calibration is unavailable via the first-generation ZBBridge, old ZHA, Alexa and SmartThings [1]

Control and features8

Setpoint range — what it means The temperature you can set, from minimum to maximum. The lower limit matters for keeping the home frost-free while nobody is in.	4–35 °C [1]
Weekly schedule — what it means How the schedule stored in the device is organised: each day separately, 'weekdays + Saturday + Sunday', or 'weekdays + weekend'. 'App only' means the hub or cloud runs the schedule, so it stops working without a connection.	Each day separately (7 days)In eWeLink (“Smart Schedule”) intervals are set separately for each weekday and can be copied between days; the head follows them in Auto mode. The maker does not say explicitly whether the schedule is stored in the head itself [2]
Schedule periods per day — what it means How many times a day the device changes the setpoint by itself following the schedule. A typical weekday has 4–6 changes: wake-up, leaving, coming back, night.	Not stated by the manufacturer
Functions — what it means Extra modes stated by the maker: child lock, frost protection (the boiler starts if the home gets too cold), open-window detection, eco mode, holiday mode, boost heating and keeping settings after a power cut.	Child lock, frost protection, open-window detection, valve anti-scale exerciseWindow: after a drop of more than 1.5 °C within 4.5 min the head sets 12 °C (“OP”). Frost protection turns on below 5 °C and off above 7 °C; the threshold is adjustable in the app. Valve exercise every Monday at 00:00 (“CA”). Eco, holiday and boost modes are not stated [1]
Manual valve opening setting — what it means Whether the app lets you set how far the valve is open (e.g. 0–100 %) instead of regulating by temperature. Used for balancing radiators and in advanced Home Assistant automations.	YesIn eWeLink: valve opening and closing percentage, 0–100 % [1]
Display — what it means Whether the unit has its own screen with readings. With a screen you can see the temperature without a phone; without one, only in the app.	LED digitsThe spec does not name the display type; official photos show glowing dot digits under the housing. It shows target temperature, mode, heating, connection and low battery; it can be rotated 180° [2]
On-device controls — what it means How you operate the device without a phone: touch buttons on glass, mechanical buttons or a rotary knob (ring).	Rotary knob or ring, mechanical buttonsRotary knob and a middle button; the configuration key is under the removable cover [3]
Data history	6 months of history in eWeLink [2]

Operating conditions2

Operating temperature — what it means The air temperature range the device is rated for. The lower limit matters outdoors, on balconies and in unheated rooms.	0–60 °CThe V1.0 user manual says −10…50 °C [2]
Operating humidity — what it means The rated relative humidity range, non-condensing.	5–95%Non-condensing [1]

Model and version1

Colour — what it means The housing colour of this model. Other colours in the same series are separate products.	White [1]

Package contents2

Package contents — what it means What comes in the box, per the maker.	Radiator head, RA, RAV, RAVL, CAL, GIA and M28 adapters, fixings (screw, nut, 4 pins), quick guide, card with a QR code to the installation video. Batteries not included. [4]
Manufacturer warranty — what it means The warranty period the maker states. Confirm warranty terms in Moldova with the seller.	24 months“2-Year Hassle-Free Warranty” on the official SONOFF store page; the regional seller's warranty terms may differ [2]

Differences between manufacturer documents

The table shows the primary document’s value. Below is what other manufacturer documents state; we check the supplied version’s label before sale.

Weight: The V1.0 user manual says 157 g

Manufacturer documents

Clear purchase details

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Warranty and documents

The warranty is at least 12 months. The exact period and conditions for equipment and installation work are stated in the sales documents and the accepted proposal. Further support is agreed for each project.

Can I return the product?

Current conditions are published on the Return policy page. Email office@casasmart.md with your order number for the steps relevant to your situation. Statutory consumer rights continue to apply.

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