Anwis external venetian blinds protect the interior of the building against excessive sunlight, effectively reducing the level of noise as well as adding the perfect finishing touch to its look. Mounted on large glass surfaces they act as an insulator regulating air temperature inside the building. By changing their tilt angle one can adjust the amount of light and heat penetrating into the room. The main feature of the blinds in the SOLIDBOX system is the construction, which ensures the free installation of the box and guides under the external layer of building insulation, e.g. polystyrene. The visible element in the light of the glass are only movable lamellas, which, when pulled up, “hide” under the building facade.