What is the ventilation flap?
Daylight is essential, as well as fresh air.
One of the unique features of VELUX roof windows is the ventilation flap. This allows you to let fresh air in even if you are not home and the window is closed.
Daylight is essential, as well as fresh air.
One of the unique features of VELUX roof windows is the ventilation flap. This allows you to let fresh air in even if you are not home and the window is closed.