CS77 has always been and still is the system with the best price-performance ratio. For decades, CS77 windows have proven to be excellent at large sites with very high demands on structural strength and energy efficiency.

The system is available in three designs:

– 77 Functional – a classic design with smooth, rigorous surfaces;
– 77 Softline – the system has rounded sash and glazing beads;
– 77 Hidden vent – the system with a hidden sash. From outside the sash is not visible, as it is hidden behind the frame profile. From the street, all profiles look the same, without thickening.