This special entrance features a sophisticated tilt-and-turn window, engineered to harmonize airflow with pedestrian movement. Its intelligent 2-in-1 design delivers both discreet ventilation and full access. The secure micro-ventilation tilt mode ensures a constant air exchange while keeping the staircase clear. When a full opening is required, a 180-degree turn of the handle converts it into a side-hung casement door, creating a safe and unobstructed passage.