Products with the Powered by Shelly badge are enhanced by the ShellyX chip, offering complete Shelly capabilities. Add them to the app, unlock all Shelly features, and enjoy compatibility with leading smart home systems.
Products with the Powered by Shelly badge are enhanced by the ShellyX chip, offering complete Shelly capabilities. Add them to the app, unlock all Shelly features, and enjoy compatibility with leading smart home systems.
Smart thermostat powered by Shelly, designed for precise control of underfloor heating. Manages heating valves and can signal the heat source to turn on or off. Equipped with humidity sensing, anti-freeze protection, and full Shelly capabilities.
2
2 Years Warranty
2 Years Warranty
This warranty covers any issues with the hardware or firmware that exist at the time of purchase or that appear within the warranty period. The warranty includes all parts of the hardware, such as the body, mechanics, and display (if applicable). However, it does not cover consumable items like batteries or accessories, as their lifespan depends on how much they are used.
Valve control - precisely manages the valves in your underfloor heating system (supports up to 2A resistive load or 1A inductive load).
Dry contant relay - can signal your gas boiler, pellet stove, or other heating sources to turn on and off.
Supports electric underfloor heating - the thermostat can signal a connected Shelly relay to switch the heating on or off automatically based on temperature settings.
Anti-freeze function - maintains a minimum temperature during long absences to prevent pipes from freezing and bursting.
Humidity sensor
Temperature & humidity offsets - adjust the thermostat’s readings to make them more accurate.
No hub required! Wi-Fi and Bluetooth connectivity
Wi-Fi Range Extender & BLE Gateway
Simple & intuitive interface
Powered by Shelly - equipped with a Shelly chip, offering full Shelly capabilities
Highly compatible! Easy control through the Shelly Smart Control app, most automation platforms and open documented protocols. Support for Alexa and Google Home coming soon.
Specifications
Product model:
ST1820-W
Power input voltage:
90–240 V AC 50/60 Hz
Wireless protocol:
Wi-Fi 802.11 b
Working humidity:
5% to 95%
Temperature measurement accuracy:
±0.5°C
Humidity measurement accuracy:
±5%
Working environment:
-10°C to +55°C
Load current:
2 A resistive load, 1 A inductive load
Wi-Fi
Protocol:
802.11 b/g/n
RF band:
2412 - 2484 МHz
Max. RF power:
< 20 dBm
Range:
Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions)
Bluetooth
Protocol:
5
RF band:
2402 - 2480 MHz
Range:
Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions)
No, the protocol is used only for device inclusion, allowing for quick and easy setup through the Shelly Smart Control app.
For bluetooth control it is required to have another Bluetooth device such as Shelly BLU Button or Shelly BLU Motion to interact.
Additionally, Shelly devices can function as a BLE gateway, bridging Shelly BLU devices to your Wi-Fi network.
Is it possible to use the device without a hub?
Yes, Shelly devices (except for Wave devices) operate independently without the need for a hub. They connect directly to your Wi-Fi network, and you can control them via the Shelly Smart Control app, web interface, or through integrations with platforms like Google Home, Alexa, Home Assistant and Samsung SmartThings.
This smart thermostat manages heating valves, controls heat sources, and supports electric heating through automation. With anti-freeze protection, built-in humidity sensing, and smart scheduling, it ensures comfort and efficiency.
Wi-Fi operated
Connect directly to your Wi-Fi network. No HUB required!
Total Flexibility
Manages heating valves, signals heat sources like gas boilers and pellet burners, and supports electric underfloor heating through automation.
Simple & intuitive interface
The simple design of the thermostat emphasizes on the main functionality - setting the target temperature in the room.
Anti-freeze function
Keeps your home safe by maintaining a minimum temperature during long absences, preventing pipes from freezing and bursting.
Dry contact
Features a dry contact relay to signal your gas boiler, pellet stove, or other heating sources to turn on and off.
Smart schedules
Set custom schedules based on your daily agenda or follow the sunrise/sunset and control your temperature accordingly.
Solutions
LinkedGo Smart floor heating thermostat
Control the temperature at home
Control the temperature at home
The thermostat gives you full control over your underfloor heating, directly adjusting the valves to regulate heat distribution. Using its dry contact relay, it can activate heat sources like gas boilers or pellet stoves. No matter your setup, this thermostat adapts to your needs.
Electrical underfloor heating with another Shelly
Electrical underfloor heating with another Shelly
Control your electric underfloor heating by signaling a connected Shelly relay to turn on or off based on the room’s temperature and humidity.
Full safety of your heating installation
Full safety of your heating installation
The Anti-freeze function of the thermostat ensures that even if you're away from home, your heating installation is safe. It ensures temperature in the room never gets too low thus preventing damage to the heating pipes and your home.
Lower Energy Bills
Lower Energy Bills
Equipped with full Shelly capabilities, this thermostat will save energy without sacrificing comfort. Temperature offsets ensure accurate heating, while smart schedules and scenes let you heat your home only when needed—based on time, sunrise/sunset, or automation with other devices. This helps you use less energy and lower your bills.
Notice uniquement en anglais et en allemand. Donc pour le français, il faut se débrouiller. Je confirme : aucune entrée de fil pilote.
M
M.
Very good product
Very good product. Works real good
E
E.
👍🏼
Super Teil schöner wäre es wenn man um 0,5 Grad am Gerät verstellen könnte wie auf der App
M
M.
Super schlechter Service kein Deutscher Kontakt
Super schlechter Service kein Deutscher Kontakt komplette Marke nicht zu empfehlen
A
A.
Das Gerät arbeitet zuverlässig Temp. Abweichung zu groß
Das Gerät arbeitet zuverlässig, jedoch war eine Kalibrierung mit einem anderen Thermometer notwendig. Die Temperaturabweichung nach dem Firmware Update waren zu groß ca 3°C.
