Window Component Only Require Flashing/Kerb & Control Unit for the Complete Smoke Vent System VELUX smoke ventilation system means that you can easily comply with building regulations and European standards on smoke ventilation with the added benefit of increased daylighting into a building. Fully automatic, the system opens up the roof window as soon as smoke is detected or a break glass point is activated. So assisting a safe and fast escape in the event of a fire, as smoke is dispersed quickly from corridors and stairways. Accessories such as wall switches for controlled ventilation and rain sensors are also available. For more information on the window's smoke ventilation area, please contact our sales team on (01752) 692 760