The darkening flap for flat roofs
The aluminium darkening flaps WD-40 are ideally suited for efficient smoke extraction in the event of fire. They are utilised in instances where daylight is not needed. The aluminium flap in a sandwich construction is thermally separated by the sturdy fan framework made of rigid PVC and insulated with 40 mm mineral wool. Therefore, it is entirely energy-efficient.
The darkening flaps can be utilised in new buildings and refurbishment projects, and adapted to individual requirements using the wide range of VELUX Commercial accessories. An optical adaptation to your project is also no problem due to the surface area in RAL colour.
The aluminium darkening flaps WD-40 are also suitable for daily ventilation. The actuation can be executed either manually, electrically or pneumatically as desired.