Velux GGL MK04 216640D Electric White Painted Copper Clad Centre Pivot Roof Smoke Ventilation Window 780mm x 980mm

• Provides automatic smoke ventilation • Most suited for roof pitches between 15-60 degrees for smoke ventilation purposes • Opens to 85 degrees within 60 seconds • Toughened outer pane with clear and clean coating and laminated inner pane for additional safety • Comfort ventilation possible at the touch of a button • Comes with laminated inner pane for additional safety with easy-to-clean coating on outer pane to keep the glazing cleaner for longer