The first electric heating thermostat for the smart home in North America

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Thermostat for electric heating 3000 W / 4000 W – Mi-Wi (Legacy)

Control it at any time, from anywhere!*

With Neviweb, manage your heating whether you’re traveling or nearly asleep

  • 7-day programming, up to 6 periods per day

    From your smartphone, tablet or computer

  • Remote access

    Control all your compatible smart devices with the Neviweb app

  • Integrate your thermostats to scenes

    Assign predetermined setpoints for various occasions

  • Detailed consumption reports

    See how much you save

Thermostat for electric heating 3000 W / 4000 W – Mi-Wi (Legacy)

A new Neviweb app, many new features


Comfort and savings within your reach.

  • Easy to install and program

    Simple installation (2 non-polarized wires)

  • Early start function

    Come back to a warming home

  • Backlit display

    To see clearly, even at night

  • Outdoor temperature display

    Convenient, especially on busy mornings

Thermostat for electric heating 3000 W / 4000 W – Mi-Wi (Legacy)

The Sinopé smart home

The Web programmable product line works in symbiosis. Full control is now within your reach.

The Sinopé smart home

The Web programmable product line works in symbiosis. Full control is now within your reach.

*Remote access requires a permanent Internet connection and a GT125 Web interface



Height: 12.7 cm (5 in)

Width: 8.5 cm (3.35 in)

Depth: 2.8 cm (1 in)



Height: 12.7 cm (5 in)

Width: 11.5 cm (4.53 in)

Depth: 3.2 cm (1.26 in)


This Mi-Wi thermostat for electric heating is designed for electric heaters such as:

  • Baseboard heater
  • Convector (short cycle)
  • Fan-forced convector (long cycle)
  • Radiant ceiling heating

Cannot be used with:

  • A system driven by a contactor or a relay (inductive load)
  • A central heating system


  • Control your thermostats with the Neviweb app

  • Create scenes for the perfect ambiance and comfort in a single click

  • Lock manual control to only keep the remote control

  • Determine the minimum and maximum set temperature for each thermostat

  • Sort your devices by room and by type of device in Neviweb

  • See your energy consumption in real time ($ / kWh /%) and save on your electricity bill

  • Program different schedules for each day of the week, up to 6 times a day

  • Activate the following modes for precise control based on your needs: auto, manual, and standby

  • Receive an alert when the temperature drops or when it is too high

  • Enable early start mode to get the desired temperature at the scheduled time

  • Access the outside temperature provided by The Weather Network featured directly on the thermostat display

  • View the indoor and setpoint temperature displayed in °C or °F on the thermostat display

  • Have the right time anytime displayed in the format of your choice (12h or 24h): your device automatically synchronizes the time

  • Activate the backlit display at all times or leave it in automatic mode to see well day and night

Connectivity requirements


  • GT125 gateway connected to the Internet

  • Smartphone or tablet

  • Neviweb app, available for free in the App Store and in Google Play*



* Users of Mi-Wi devices can also use the intuitive Website to control their smart home devices remotely:

Voice assistants

The Mi-Wi thermostat is compatible with Amazon Alexa via the Neviweb App and the GT125 gateway.

Mi-Wi devices are not compatible with Google Home due to new requirements from Google's system that aren't compatible with this product line.

Operating voltage

120/208/240 Vac, 60 Hz

Maximum load


12.5 A / 3000 W @ 240 Vca


16.7 A / 4000 W @ 240 Vac

Minimum load

0.5 A / 120 W @ 240 Vac

Temperature range

Setpoint: 5 °C to 30 °C (41 °F to 86 °F)

Display: 0 °C to 70 °C (32 °F to 99 °F)

Storage: -20 °C to 50 °C (-4 °F to 122 °F)


± 0.5 °C (± 1 °F)

Maximum distance between Mi-Wi products

Approximately 9 meters (30 ft)*


*The distance between Mi-Wi (Web programmable) devices can differ depending on their location and if the RF signal is affected by interference sources.


Tested in accordance with CSA-C828-13


3 years

In the box

  • TH1120RF-3000 or TH1120RF-4000 thermostat
  • Installation guide – English version
  • Installation guide – French version
  • 2 screws




  • Mi-Wi (Web programmable)
  • 3000 watts
  • Works with Neviweb

Retired product

3000 W

4000 W

PROMO FREE STANDARD SHIPPING on all online orders of $50 or more delivered in Canada. Please note that due to COVID-19 Canada Post cannot guarantee delivery times.

For a limited time, Sinopé technologies is offering FREE STANDARD SHIPPING on all online orders over $50, after promo discounts and before taxes. This shipping offer applies only to orders being shipped to Canada (no postal box shipping). Note that the right to free delivery may be revoked if you change the delivery address of your order or if you cancel one or more items ordered reducing the total before taxes of the order under $50.

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