Wall box

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Wall box consisting of telescopic tube and non-return valve

A wall box is used in walls or ceilings to accommodate parts of the building technology .

Smaller wall boxes for electrical installation are also known as installation boxes .

Wall boxes as part of a ventilation system

Wall boxes allow the concealed installation of non- return flaps , silencers and other elements at fresh air inlets and outlets.

If necessary, wall boxes can be made heat-insulating.

The outer cover typically consists of slats or a metal grille. A fly screen is often integrated to protect against insects.

Connected ventilation lines are to be laid outwards with a slight incline to allow any condensate that may develop.

Wall boxes with preinstalled components are also offered with an electrically driven non-return valve, which minimizes pressure loss and noise.

Combined exhaust and supply air wall boxes are also used. The openings for exhaust and supply air are then arranged next to or below one another. Mixing of the exhaust and supply air is reduced by blowing the exhaust air at an angle away from the inlet opening. Combined wall boxes are partially equipped with a single non-return flap that closes the inlet and outlet air openings at the same time. Alternatively, two motorized flaps can be used and electrically coupled to one another in order to open and close at the same time.

Wall boxes with motorized flaps were specially developed for low-energy houses in order to minimize unwanted air circulation. The non-return flaps open when the cooker hoods are switched on or are controlled by an air pressure sensor (in the exhaust air pipe).