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The original VELUX top-operated, centre-pivot roof window GGL is easy to operate and gives you the freedom to place furniture underneath. The innovative top control bar allows you to install the window at a lower position to get an excellent view while standing and even when seated. Open the top control bar to the ventilation position for fresh air through a closed window. Easily rotate the window 180° for safe cleaning of the outer glass from the inside. The glazing comes standard with premium features like safety lamination, toughened glass, UV filter and our unique rain noise reduction.