CS 77 Fire Proof

CS 77 Fire Proof

Concept System 77 Fire Resistant window

Optimised safety and comfort

Concept System® 77 is a high insulating window system that meets elevated requirements regarding thermal insulation, stability and security. Anticipating stringent thermal requirements, the insulation value (Uf) for this system goes down to 1.6 W/m²K for a standard opening window. The unique concept of the system makes it perfectly suitable for the incorporation of triple glazing. CS 77 has even achieved the Swiss Minergie® component label, the sustainability brand for new and refurbished buildings. 

The system’s performance regarding acoustics, water and air tightness, but also for specific applications like bullet and fire Resistance, meets the most severe European standards. Moreover, CS77 windows are available in different burglar resistance levels (class 2 & 3) making it an extremely secure system.

To match different building types, the system is available in a variety of aesthetic styles: Functional, Renaissance and Hidden Vent. 

The CS 77 system includes the most complete range of solutions for all types of inward and outward opening windows. Ultimate combinations, with CS 77 doors, CP 130 sliding systems and Ventalis ventilation units, makes CS 77 extremely suitable for all types of building concepts, even with the highest safety requirements.



Technical information


Rebate height25 mm 
Min. Glass thickness15 mm 
Max. Glass thickness49 mm 


Air tightness max. test pressure4 (600 Pa)
Water tightness9A (600 Pa)
Wind load resistanceC5 (2000 Pa)
Thermal insulation (Uf)2.6 W/m²K

Opening elements

  • Fixed windowFixed window