COR 70

The COR 70 Hidden Sash, like the 80 mm version, features a slim 66 mm sightline and supports the ARCH INVISIBLE handle, concealed hinges, and a hidden drainage system for a clean, uninterrupted look. It minimizes the visual impact of window components and is compatible with all 70 mm frame depth systems. A bottom gasket replaces face drainage, ensuring efficient water evacuation. Its inward-opening design also simplifies installation, allowing the frame base to be positioned directly on-site.