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Low voltage thermostat 24 Vac – Mi-Wi (Legacy)

Control it at any time, from anywhere!*

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

  • Remote access

    From your smartphone, tablet or computer

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

    Copy a schedule to another device or another day

  • Detailed consumption reports

    See how much you save

  • Frost safe mode

    Maintain the minimum temperature and save without damaging your home

Low voltage thermostat 24 Vac – Mi-Wi (Legacy)

Try Neviweb now!


Comfort and savings within your reach.

  • One thermostat, two heating devices

    Manage an auxiliary heating device, in addition to the main heating, with only one thermostat

  • Away mode

    Put the house in vacation mode in a click

  • Outdoor temperature display

    Convenient for busy mornings

  • Early start function

    Come back to a warm home

Low voltage thermostat 24 Vac – 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: 12.2 cm (4.8 in)

Width: 7.2 cm (2.88 in)

Depth: 2.6 cm (1.02 in) + 0.76 cm (0.3 in)


This Mi-Wi low voltage thermostat (24 Vac) is designed to control heating devices such as:

  • Baseboard heater activated by electronic relay (SSR)
  • Baseboard heater activated by mechanical relay
  • Fan-forced convector
  • Electric floor heating (activated by a relay)
  • Hydronic floor heating
  • Hydronic heating system
  • Furnace (without fan control)

Cannot be used with:

  • Air conditioning system
  • Heat pump

* The installation requires the presence of 3 wires: supply, load and common.


  • Remote access through the Neviweb platform
  • 7-day programming, up to 6 periods per day
  • Modes: automatic, manual, away, standby, frost safe
  • Second output allowing the control of an auxiliary heating device
  • Floor or ambient temperature control*
  • Energy consumption reports generated on-demand
  • E-mail alerts sent according to set parameters
  • Early start function
  • Automatic time synchronization
  • Automatic daylight saving time
  • Time display
  • Indoor, outdoor and setpoint temperature displayed (°F or °C )
  • Backlit display

*Floor sensor not included. Compatible with the Sinopé floor heating sensor or 10K and 12K sensors at 25 ° C.

Connectivity requirements


  • GT125 Web interface connected to the Internet
  • Smartphone, tablet or computer
  • Browser to access Neviweb

Operating voltage

24 Vac

Maximum load

1 Amp

Temperature range

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

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


± 0.5 °C (± 1 °F)


-20 °C to 50 °C (-4 °F to 122 °F)

Auxiliary output

1 Amp

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.


3 years

In the box

  • TH1400RF thermostat
  • Installation guide – English version
  • Installation guide – French version
  • Installation template
  • 2 screws


North American


  • Web programmable
  • 24 Vac
  • Works with Neviweb


This product is subject to the U.S. 25% import tariff which is payable to UPS on delivery.

PROMO FREE STANDARD SHIPPING for all online orders of $50 or more delivered in the United States. Please note that due to COVID-19 UPS and Canada Posts 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 the United States (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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