Updated October 2026
Data from Amazon and official Shelly and Sonoff sites.
2026 verdict
Zigbee against Bluetooth: the Sonoff Zigbee Thermostatic Radiator Valve is the better smart radiator valve of the two, adding frost protection and a child lock at a lower price.
Winner
Sonoff Zigbee Thermostatic Radiator ValveLast recorded priceJan 1, 2026$39.99
Currently unavailable on Amazon USA
It also reaches Apple Home and Matter through a SONOFF bridge, which the Shelly BLU TRV cannot do at all. The Shelly BLU TRV answers with a 2 year warranty against 1 year, a smaller and lighter body and a documented 2 year battery life on 2x AA cells, and it pairs over Bluetooth with a Shelly BLU Gateway instead of a Zigbee hub. Both have a screen showing the temperature, manual schedules, support for an external room sensor and Google Home, Alexa, SmartThings and Home Assistant control. Pick the Sonoff Zigbee Thermostatic Radiator Valve if you already run Zigbee or want pipes protected in cold rooms, and the Shelly BLU TRV for a Shelly home that wants the longer warranty.
vs
Winner
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| Feature | Shelly BLU TRV | Sonoff Zigbee Thermostatic Radiator Valve | Winner |
|---|---|---|---|
| Warranty | 2 years | 1 year | Shelly BLU TRV |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Zigbee | Shelly BLU TRV |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Sonoff Zigbee Thermostatic Radiator Valve |
| Frost Protection | NO | YES | Sonoff Zigbee Thermostatic Radiator Valve |
| Child Lock | NO | YES | Sonoff Zigbee Thermostatic Radiator Valve |
| Rating | 4.1 | 4.1 | Tie |
| Screen | YES | YES | Tie |
| Sensors | Temperature | Temperature | Tie |
What the differences mean
What it connects through
The Sonoff Zigbee Thermostatic Radiator Valve needs a Zigbee coordinator, from SONOFF's own bridges to a Home Assistant stick. The Shelly BLU TRV talks Bluetooth to a Shelly BLU Gateway, which has to stay powered for remote and voice control. Which one fits is mostly a question of which hub you already own.
Frost protection and child lock
Both are on the Sonoff Zigbee Thermostatic Radiator Valve only. Frost protection keeps pipes in an unheated room from freezing, and the child lock stops small hands from turning a radiator up; the Shelly BLU TRV has neither.
Apple Home and Matter
The Sonoff Zigbee Thermostatic Radiator Valve reaches Apple Home and Matter through a SONOFF Matter bridge such as the Zigbee Bridge Ultra, iHost or NSPanel Pro. The Shelly BLU TRV supports neither, so an Apple household has a path only with the Sonoff.
Size and warranty
The Shelly BLU TRV is 78 mm long and 107 g on two AA cells, the Sonoff 95 mm and 154 g on three, which matters on a radiator tucked close to a curtain or a wall. Shelly also covers its valve for 2 years against 1 year for Sonoff.
Which one to buy if
- you already run Zigbee2MQTT or a Zigbee hub
The Sonoff Zigbee Thermostatic Radiator Valve joins it directly and is the cheaper valve.
- a spare room goes unheated in winter
The Sonoff Zigbee Thermostatic Radiator Valve has frost protection; the Shelly BLU TRV does not.
- your home is built on Shelly devices
The Shelly BLU TRV pairs with the Shelly BLU Gateway and Shelly BLU sensors, and carries a 2 year warranty.
- the radiator sits in a tight spot
At 78 mm long the Shelly BLU TRV is the more compact of the two.
$64.99
- + Warranty: 2 years
- + Connectivity: 2.4 GHz WiFi, Bluetooth
- - Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Frost Protection: NO vs YES
Winner
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Frost Protection: YES
- + Child Lock: YES
- - Warranty: 1 year vs 2 years
- - Connectivity: Zigbee vs 2.4 GHz WiFi, Bluetooth
What owners say
Owners of both valves describe a quick fit with the adapters in the box and reliable room-by-room control, and both groups mention the link to the hub or gateway as the weak spot, with the odd valve dropping out. Shelly BLU TRV owners single out how quiet and accurate the regulation is, and they report inconsistent Alexa response, Bluetooth range that depends on where the gateway sits and a built-in reading skewed by the radiator's own heat unless an external sensor is paired. Sonoff Zigbee Thermostatic Radiator Valve owners like the on-device display, the child lock, frost protection and long battery life, and their most repeated complaint is a valve motor loud enough to bother light sleepers in a bedroom.
Price history compared
Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.
- Shelly BLU TRV
- Sonoff Zigbee Thermostatic Radiator Valve
Loading price history...
Frequently Asked Questions
Which is better overall: Shelly BLU TRV or Sonoff Zigbee Thermostatic Radiator Valve?
The Sonoff Zigbee Thermostatic Radiator Valve. It adds frost protection, a child lock and a route to Apple Home and Matter through a SONOFF bridge, at a lower price. The Shelly BLU TRV counters with a 2 year warranty and a smaller body.
Is the Shelly BLU TRV a Zigbee valve?
No. The Shelly BLU TRV uses Bluetooth and connects to Wi-Fi through a Shelly BLU Gateway, so it does not pair with a Zigbee hub or Zigbee2MQTT. The Sonoff Zigbee Thermostatic Radiator Valve is the Zigbee valve of the two.
Can both valves use an external temperature sensor?
Yes. The Shelly BLU TRV pairs with Shelly BLU H&T or door and window sensors through the BLU Gateway, and the Sonoff Zigbee Thermostatic Radiator Valve can use a SONOFF Zigbee temperature sensor, which corrects for the heat right around the radiator.
Do the Shelly BLU TRV and the Sonoff Zigbee Thermostatic Radiator Valve work with Home Assistant and SmartThings?
Both work with Home Assistant, SmartThings, Google Home and Alexa. Only the Sonoff Zigbee Thermostatic Radiator Valve reaches Apple Home and Matter, through a SONOFF Matter bridge.
Who should buy the Shelly BLU TRV?
Households already built on Shelly, or anyone who prefers a Bluetooth gateway to a Zigbee hub and values a 2 year warranty and a compact valve.
Who should buy the Sonoff Zigbee Thermostatic Radiator Valve?
Zigbee and Home Assistant users equipping several radiators on a budget, homes with rooms that need frost protection, and families who want a child lock on the valve.
Full comparison table
Compare all 13 Radiator Valves side by side
You are looking at two of them. The full table lines up all Radiator Valves in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 13 Radiator Valves
- 34 specs compared
- 31 filters
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MerossSmart Thermostat Valve
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MoesZigBee Smart Radiator Valve
$48.99
MoesSmart Thermostatic Radiator Valve
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NodOnZigbee Thermostatic Radiator Valve
€74.10
CamerasShellyCamera
DisplaysShellyWall Display X1i
€188.90
DisplaysShellyWall Display XL
4.1(65)$349.99
DisplaysShellyWall Display
4.4(434)€129.36
Door & Window SensorsShellyBLU Door/Window Outdoor ZB
Door & Window SensorsShellyBLU Door/Window ZB
4.5(41)$22.99
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4.5(150)$114.99
Energy MonitorsShellyEM Gen3
4.6(270)$69.99
Energy MonitorsShellyEM Gen4
3% OFF€67.00€65.12
Energy MonitorsShellyEM Mini Gen4
4.5(138)$24.99
Energy MonitorsShellyPro 3EM 3CT63
4.4(349)$150.99
Energy MonitorsShellyPro 3EM-400
4.3(21)$329.99
Energy MonitorsShellyPro 3EM v2
4.5(79)$154.99
Energy MonitorsShellyPro EM-50
4.6(952)$119.99
Gas DetectorsShellyGAS (CNG)
4.2(45)14% OFF€64.99€55.84
Gas DetectorsShellyGAS (LPG)
LED BulbsShellyMulticolor Bulb E27 Gen3
4.2(35)€9.90
Motion SensorsShellyBLU Motion ZB
4.5(43)$26.99
Motion SensorsShellyBlu Motion
4.0(1,034)Last priceMay 1, 2026$25.99
Unavailable
PlugsShellyPlug M Gen3
4.5(791)€12.90
Air Quality MonitorsSonoffSAWF-07P Air Quality Monitor
3.8(194)$39.90
Air Quality MonitorsSonoffSAWF-08P Air Quality Monitor
4.4(172)$49.90
CamerasSonoffCAM GlassView
4.1(39)$34.90
CamerasSonoffCam Outdoor DUO
3.5(2)$79.90
CamerasSonoffCam Slim Gen2
4.4(179)$19.90
CamerasSonoffGK-200MP2-B
4.0(149)Unavailable
DisplaysSonoffNSPanel Pro Gen2
3.4(11)€149.90
DisplaysSonoffNSPanel Pro
4.1(76)$129.90
DonglesSonoffDongle Lite MG21
4.5(458)$24.90
DonglesSonoffDongle Max
4.3(623)$42.90
DonglesSonoffDongle Plus MG24
4.6(696)$35.90
DonglesSonoffDongle Plus PP10
4.6(100)$35.90
DonglesSonoffDongle-PZG23
4.5(176)$39.90
DonglesSonoffZ-Wave 800 PoE Dongle Max
4.5(28)$44.90
DonglesSonoffZBDongle-E
4.7(3,745)$24.90
DonglesSonoffZBDongle-P
4.6(5,689)16% OFF$39.99$33.42
Door & Window SensorsSonoffDW2-WIFI
3.8(1,058)$12.90
Door & Window SensorsSonoffSNZB-04 ZigBee Wireless Door/Window Sensor
3.7(101)Last price$17.99
Unavailable
Door & Window SensorsSonoffSNZB-04P ZigBee Door/Window Sensor
4.0(13)$15.90
Door & Window SensorsSonoffSenseGuard DW Gen2
4.2(279)$13.90