Test Konyks eCosy

Konyks eCosy test – Control your radiator remotely

I. Presentation

In this article, we are going to talk about the Konyks eCosy box, the purpose of which is to allow you to control your electric heater remotely, from your smartphone or a voice assistant such as Alexa or Google Assistant. A topic that comes at the right time in this tense period when the price of energy is soaring and where we are starting to need to heat ourselves.

From the moment the Konyks eCosy box is connected to the pilot wire of your electric heater, the latter becomes a connected radiator ! Indeed, we will be able to:

  • Define a heating schedule precise, day by day, with a division into 30-minute periods, to indicate in which mode our radiator should operate (frost protection, eco, comfort, etc.)
  • Use a “Vacation” mode which allows to “cut” the radiator for X days in case of absence extend
  • Create scenarios to trigger the radiator according to another event, in particular based on the temperature recorded by the Konyks Termo thermometer, for example.

Each case Konyks eCosy can manage only one radiator, unless the radiators are connected in series and it is marketed at the price of 49,90 euros. This product from French Tech has been marketed since 2020, and can be found on various sites, including Amazon or the brand’s official store.

The Konyks eCosy box is compatible with all wall-mounted electric heaters equipped with a pilot wirewhether it is a fluid inertia radiator, a dry inertia radiator, etc… I connected it to an Acova brand radiator.

II. Package, design, box contents

The packaging in the usual Konyks colors gives us a nice overview of the product itself, as well as its key functions: “Remote control and programming of electric wall heaters“, with WiFi connection, voice control or app control, as well as the automation aspect.

In the box we have the following: the eCosy boxand guide d’utilisation and one fixing kit consisting of dowels and screws. In addition, a strip of 3M double-sided adhesive is provided: personally I prefer this method of attachment rather than the ankles, especially since the case weighs only 116 grams.

The eCosy box is relatively compact: ‎9 x 5 x 2.5 cm. This will allow it to make room for itself between the wall and the radiator. It is not necessary for it to be visible since there is feedback to the smartphone. To fix it to the wall, everything necessary is included. It does not work with batteries hence the presence of three wires: two for the power supply and a third for communications with the radiator. The integrated electric cable measures 50 cm.

Entirely white with the black upper front, this plastic box will be able to be discreet since a majority of the radiators are white. Let’s say it has a mat design and that’s good.

III. Installation Konyks eCosy

Before you can associate the Konyks eCosy box with your smartphone, you have to spend some time installing it. It goes without saying that depending on your existing installation, this will be more or less easy. As far as I’m concerned, the installation was quite simple thanks to the direct access to the connection box, after removing the radiator.

For phase and neutral, simply connect the cables to the Wago terminals already in place for the radiator. With three-slot Wago terminals, that’s enough. While for the pilot wire, I added a Wago terminal to connect the pilot wire of the radiator with that of the eCosy box.

The screen of the eCosy box displays several information, including the WiFi status as well asa light that represents the active mode on the heatsink. For example, it is a sun for the comfort mode.

Since the Konyks eCosy box is connected to the heater and supplied with electricity, it turns on. Therefore, it becomes possible to integrate it with Konyks app (or Tuya apps). The integration process is classic: we add a device, here “Heating”, we indicate the WiFi network and the search is launched… This time, I had to do it several times before the connection is established. A bit frustrating as the WiFi signal was good.

The getting started phase is over, let’s look at the features.

IV. Features in the Konyks app

In the Konyks application, when we select the eCosy box, we arrive on a control panel with a blue background. This allows to change the mode of the heater remotely. Here is the list of available modes: comfort, comfort -1 degree, comfort -2 degrees, eco and frost protection.

The temperature itself cannot be defined from the application: the transition from one mode to another is managed. It is on the radiator that you will have to define the setpoint temperature for each mode. In addition, the application allowsturn off or turn on the heateralways at a distance.

When the schedule is activated, we have the possibility of set the mode for each day of the week, in 30 minute increments. Thus, we can achieve precise programming adapted to our needs. For example, you can heat less during the day, but more in the evening when you are present at home.

The mode “Voyage” allows switch to “frost protection” mode for X days ; then the usual schedule takes over. Practical when you are away for a weekend or during one or two weeks of vacation.

When you switch to comfort mode at 21 degrees, for example, the radiator will come on…or not: it depends on the radiator. If it is already 22 degrees (read by the temperature sensor integrated in the radiator), it will not start immediately.

In case we are equipped with a temperature sensor Konyks Termowe can imagine a slightly more dynamic schedule, or intelligent, say, because it is not necessarily fixed. For example, you can create a scenario like: “If the temperature read by the room thermometer is below 20 degrees, then the radiator is switched to comfort mode“. Thus, we do not act systematically according to a schedule, but rather on event.

Other examples can be cited:

  • Choose the heating mode according to sunrise or sunset time (as can be done with shutters)
  • Choose the heating mode according to the outside temperature (value below or above a specific value)
  • Adapt the heating mode if a window or a door is open (requires a sensor such as the Konyks Senso).

In my opinion, the most interesting is to rely on the temperature recorded by an indoor temperature sensor.

Finally, for lovers of voice assistants, know that the eCosy is easily associated with Amazon Alexa and Google Assistant. Thus, a set of voice commands are available. For instance : “Alexa, put the bedroom heater on comfort mode” ; “Alexa, turn off the heating“.

V. Conclusion

Does the Konyks eCosy box save energy? Certainly, if the programming is well refined, especially if one relies on a temperature sensor complementary to the radiator. I still don’t have enough perspective on the use of this product. Don’t forget that it also depends on your radiator: if it’s a “toaster”, you can’t work miracles… On the other hand, it is possible to make optimizations, that’s for sure. Admittedly, there is an initial investment which is not insignificant depending on the number of radiators to be controlled, but in the long term, intelligent heating control becomes an interesting lever for saving money. The objective is clear: we heat only when it is really necessary.

Marketed at a price of 49.90 euros (which may vary depending on the store), the Konyks eCosy is positioned in the middle for a device of this type.

Konyks eCosy

49.90 €

Features / Application


Value for money


Good points

  • Compatible with all radiators fitted with a pilot wire
  • Remote control
  • Easy to configure
  • Easy to set up even though…
  • Status LEDs on the box

Negative points

  • …Some difficulties to add it in the Konyks application
  • No temperature control (it’s not a thermostat)

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