The VELUX Smoke Vent system comes with everything you need to comply with building regulations on smoke ventilation, helping to guide smoke and heat out of a burning building. The system comes with a Centre-Pivot uPVC Roof Window that has a toughened outer pane and laminated inner pane helping to prevent the glass from shattering when broken. It’s finished in a Clear and Clean coating which helps keep the window cleaner for longer. One smoke sensor, break glass point, control unit and tile or slate flashing is included too but you can purchase additional smoke sensors and break glass units. The window is suitable for roof pitches between 15°-90 ° and comes with the VELUX 10 year guarantee.