CONCEPT SYSTEM 77 is available in various aesthetic styles to match current trends, while offering all types of inward- and outward-opening windows and doors. The system’s performance in terms of acoustics, water and air tightness, as well as special applications such as bullet and fire resistance, meets the strictest European standards. In addition, CS 77 is available in different burglary-resistance levels (RC2 and RC3), making it an exceptionally secure system.
The CS 77 window and door system is available in three different style variants. Whether you prefer a more traditional Renaissance look or the very clean and modern lines of the Hidden Ventilation style, the CS 77 aesthetic will complement almost any design.
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| Hidden ventilation | Renaissance | Functional |
| Maximum frame height | 2800 mm |
| Maximum frame width | 1200 mm |
| Maximum weight | 170 kg |
| Total system depth frame | 68 mm |
| Min. Min. Glass thickness | 4 mm |
| Max. Min. Glass thickness | 52 mm |
 | Air tightness Maximum test pressure 4 (600 Pa) | 4 (600 Pa) |
 | Waterproof | 9A (600 Pa) |
 | Wind load resistance | C3 (1200 Pa) |
 | Burglar resistance | PAS24, RC2/WK2, RC3/WK3 |
 | Thermal insulation | 1.5 W/m²K |
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Thermal insulation
(Uf)1,5 W/m²K
