Top-and-bottom folding window

Vertically folding windows, also known as vertical folding windows, employ an innovative design that operates the sashes via a central pivot hinge. When opened upwards, the upper sash folds inwards while the lower sash tilts outwards, creating a unique ventilation and safety angle.
Their core advantages include: – Space-efficient inward-opening design that preserves indoor and outdoor activity areas – Balanced ventilation and safety: the tilted sash creates a protective barrier, ensuring airflow while preventing accidental child falls – Easy cleaning: select models support 180-degree sash rotation for effortless cleaning of both inner and outer glass surfaces Particularly suited for compact spaces or safety-critical areas such as balconies and kitchens.