Product Features

Vertical Folding Opening Mechanism
The sash divides into multiple panels that fold upward like an accordion, stacking neatly at the top and creating a fully open aperture for maximum ventilation.

Space-Saving Vertical Stacking
Unlike horizontal folding or projecting windows, the vertical folding design uses no side space, making it ideal for narrow balconies, corridors, and small rooms.

Smooth Counterbalance System
Precision torsion springs or gas struts assist lifting, allowing effortless one-hand operation to raise or lower the folding panels to any desired height.

Compact Storage with Minimal Visual Impact
When fully opened, all panels stack compactly above the opening, leaving the view completely unobstructed and maintaining a clean, minimalist appearance.

Reliable Sealing When Closed
Multi-point compression seals engage between each folding panel and the frame, delivering excellent airtightness, water resistance, and sound insulation.