Radiator with open-window detection

A radiator with open-window detection helps prevent heat loss when you air out a room. Its built-in temperature sensor detects the sudden drops in temperature associated with an open window and automatically adjusts its operation.

This feature is now available on many recent electric radiators that comply with the European EcoDesign* standard. The aim is to promote eco-design for energy-related products such as heating equipment. It helps make everyday heating use more efficient.

How does automatic open-window detection work?

Contrary to what you might think, there is no need to install an external sensor on the window. Everything happens inside the radiator:

• Its internal sensor continuously measures the room temperature.
• When it detects a rapid, unusual drop in temperature, the system interprets it as a window opening.
• The radiator then reduces its power or temporarily stops heating.

This technology is built into all Bestherm radiators and heated towel rail to make heating easier to manage and avoid unnecessary energy use while airing out a room.

Why choose an electric radiator with open-window detection?

When you open a window to air out a room, a standard radiator generally keeps heating. It tries to compensate for the drop in temperature, even though it is only temporary.

With open-window detection, the radiator recognises this situation and automatically adjusts its operation. This helps avoid heating an empty room for a few minutes while you air it out.

Combined with a schedule tailored to your household's routine, it helps manage heating more efficiently throughout the year.

Connected, dry inertia or fluid: which model should you choose?

Open-window detection is available on several types of electric radiators. The right model depends above all on your needs and lifestyle.

Connected radiators: control your heating remotely

Connected radiators let you control your home's temperature from a smartphone or tablet. Using an app, you can adjust heating settings, change the schedule or monitor your appliances remotely.

Combined with open-window detection, this remote control feature makes it easier to manage your home's energy consumption.

A connected radiator makes it easier to adjust the heating to your needs and habits.

Ceramic or cast iron: which heating core should you choose?

Open window detection is particularly useful on dry inertia radiators. These appliances store heat in a refractory material before gradually releasing it into the room.

When a window is open, the detection feature prevents the heating core from being used unnecessarily while you air out the room.

The two main dry inertia technologies are ceramic and cast iron. Each has its own characteristics in terms of heat distribution and storage, but both benefit from the advantages of automatic open window detection.

To optimize your heating even further, some models can also be fitted with an occupancy sensor (PIR) that adjusts the heating based on whether the room is occupied.

FAQ: Everything you need to know about radiators with open window detection

Is it necessary to buy an external sensor for the radiator to work?

No, no external sensor is required.

The radiator uses its own internal sensor to analyze changes in room temperature and identify the temperature drops characteristic of an open window.

Do Bestherm radiators have open window detection?

Yes, all Bestherm radiators and heated towel rail include this feature.

When a rapid drop in temperature is detected, the appliance automatically adjusts its operation to prevent energy waste while you air out the room.

What energy savings can you expect from this feature?

The savings achieved vary depending on how often you air out your home, its insulation, and your heating habits.

Open window detection does not replace good scheduling or effective insulation, but it helps prevent some unnecessary energy consumption and helps avoid unnecessary energy use in everyday life.

* The European EcoDesign regulation aims to encourage the design of products that are more energy-efficient and make better use of resources. It applies in particular to energy-related products, such as heating appliances, to promote ecodesign and reduce their environmental impact.

** https://europa.eu/youreurope/business/product-requirements/compliance/ecodesign/index_fr.htm