Schellenberg Window trickle vent extender Brown

With the installation of a window fold fan Plus, you can provide for a uniform fine ventilation in your home despite a closed window. This reduces the wall and room humidity, improves the air quality and prevents mold formation. The window fold fan creates an inconspicuous air gap at the window, through which fresh air flows into the room in a controlled manner. In order to achieve an optimal air flow, you should install at least one additional window fold fan on a different facade side for each 10 m² room area. If the air pressure changes during the air exchange, the fan flaps of the window folding fan plus close automatically to prevent a possible draft. The ventilation is purely mechanical, electricity or maintenance costs are eliminated and the noise protection of the windows remains. A maximum air volume current of 6.0 m³/h is possible per fan, depending on the air pressure and window type. The window folding fan Plus fulfills the ventilation standard for interior rooms and residential buildings accor...