Unlike an internal sun protection device such as a blind, an external device prevents sunlight from directly hitting window glass. It reflects and absorbs the heat generated by the sun's rays and only allows infrared waves to pass through, which do not produce heat. A blind, on the other hand, provides glare protection in the interior and can dissipate some of the radiation, but is not suitable for keeping out heat energy. As a result, the rooms become very hot. From a building physics perspective, external sun protection is definitely preferable (see also the topic of heat protection at the consumer advice center).

You can effectively prevent heat build-up with a window with removable sun protection from the outside, which can be removed without leaving any residue if necessary. This means you have to use your air conditioning system (if you have one) less or not at all. Not only do you save electricity, but you also promote a pleasant indoor climate that enables restful sleep, concentrated work and physical relief. This is mainly important for children and the elderly, but workers also need to be protected from excessive heat exposure.

When installing external flexible sun protection, opening the window is still possible without any problems. Another advantage is that a window with sun protection keeps insects out from the outside, so you are spared from mosquitoes. At the same time, your view of the outside is not restricted, as can be the case with dark-tinted light protection films.

Installation is simple, can be done without tools and allows for removal without leaving any residue. Thanks to tailor-made manufacturing, the sun protection fits every window perfectly. It is also sustainable because the device can be reused. Cleaning is also uncomplicated, so you can easily remove dust, pollen and other dirt.