Shelly LinkedGo Smart floor heating thermostat

Delivered between Tue, 21.4. and Thu, 23.4.
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Product details

Smart thermostat, powered by Shelly - ideal for precise control of underfloor heating systems. It controls heating valves and can communicate with other heat sources. Equipped with humidity sensor, frost protection and all Shelly functions.

  • Valve control: Precisely controls the valves of your underfloor heating system (supports up to 2 A resistive load or 1 A inductive load).
  • Relay with potential-free contact: Can switch your gas boiler, pellet stove or other heat sources on and off.
  • Compatible with electric underfloor heating: The thermostat can communicate with a connected Shelly relay to automatically switch the heating on or off based on the temperature settings.
  • Frost protection function: Keeps the temperature at a minimum level during prolonged absences to prevent pipes from freezing and bursting.
  • Humidity sensor: Optimises the heating performance by taking temperature and humidity values into account.
  • Temperature and humidity offsets: Customise the thermostat readings for even more accurate results.
  • No hub required. Wi-Fi and Bluetooth connectivity.
  • Wi-Fi range extender & BLE gateway.
  • Simple and intuitive user interface.
  • Powered by Shelly: Equipped with a Shelly chip that offers all Shelly functions.
  • Highly compatible: Easy control via the Shelly Smart Control App, most platforms and protocols and voice assistants. Compatible with Alexa, Home Assistant or your favourite automation system.

Common uses:

  • Thermostat
  • Underfloor heating
  • Heating & cooling
  • Energy saving
  • Valves.

Key specifications

Thermostat type
Radiator thermostats
Suitable for
Underfloor heating
mounting style
Face
Smart home
Compatible
Smart home ecosystem
Amazon AlexaApple HomeGoogle Home
Power supply
Electrical connection
Items per sales unit
1 pcs.

General information

Item number
55654446
Manufacturer
Shelly
Category
Thermostats
Manufacturer no.
Shelly_PbS_ST_ST1820
Release date
6.3.2025
Sales rank in Category Thermostats
17 of 2681

Colour

Colour
White
Exact colour description
White

Material

Material group
Plastic

Thermostat properties

Thermostat type
Radiator thermostats
Suitable for
Underfloor heating
temperature control
BluetoothWi-Fi
Thermostat functions
Frost protection setting
Display
Digital
mounting style
Face

Smart home features

Smart home
Compatible
Smart home ecosystem
Amazon AlexaApple HomeGoogle Home
Communication standard
Amazon AlexaApple HomeKitGoogle AssistantKNXMatterZ-waveZigBee

Origin

Country of origin
China

Voluntary climate contribution

CO₂ emissions
13.23 kg
Climate contribution
CHF 0.31

Power supply

Power supply
Electrical connection

Scope of delivery

Items per sales unit
1 pcs.
Scope of delivery
External sensor

Product dimensions

Length
3.80 cm
Width
8.55 cm
Height
8.55 cm
Weight
0.09 kg

Package dimensions

Length
12.20 cm
Width
9.80 cm
Height
6.30 cm
Weight
153 g

30-day right of return
24 Months Warranty (Bring-in)
7 additional offers

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Reviews & Ratings

Warranty score

How often does a product of this brand in the «Thermostats» category have a defect within the first 24 months?

Source: Digitec Galaxus
  • 19.Eve
    1.8 %
  • 20.Hama
    2.2 %
  • 20.Shelly
    2.2 %
  • 22.Ecoheat
    2.3 %
  • 23.Netatmo
    3 %

Warranty case duration

How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?

Source: Digitec Galaxus
  • 9.Bosch Smart Home
    2 days
  • 9.Danfoss
    2 days
  • 9.Shelly
    2 days
  • 13.Eve
    3 days
  • 14.Netatmo
    5 days

Return rate

How often is a product of this brand in the «Thermostats» category returned?

Source: Digitec Galaxus
  • 6.FRITZ!
    2.7 %
  • 6.Homematic IP
    2.7 %
  • 8.Shelly
    3.1 %
  • 9.Sonoff
    3.2 %
  • 10.Netatmo
    3.9 %
Source: Digitec Galaxus

Translation: machine translated
Very good90/100
Heise onlineSingle testReleaseMarch 2026
  • PositiveEasy installation and simple commissioning
  • PositiveCompatible with Home Assistant with MQTT support
  • PositiveTouch user interface with rotary control
  • NegativeRelatively high price
  • NegativeNo window open detection
  • NegativeFull functionality under Home Assistant complex