ConceptSystem 77

Optimum safety and comfort
Top quality without compromise

Optimum safety and comfort

Concept System® 77 is a thermally insulated window system that meets the highest standards for insulation, stability and security. According to thermal requirements, the heat transfer coefficient (Uf) for this system is 1.6 W/m²K, for standard opening windows. Thanks to its unique design, the system is ideal even for triple glazing. What’s more, the CS 77 is a design solution that meets Swiss Minergie® standards. The system’s properties for soundproofing, waterproofing, airtightness, as well as bulletproofing and fireproofing, meet even the most stringent European standards. What’s more, CS77 windows are available in different burglary classes (2 or 3), so they provide maximum security. In order to fit perfectly into any type of building, the system is available in different aesthetic variants: Functional, Renaissance and Hidden Vent. The CS 77 system provides comprehensive solutions for all types of windows, both inward and outward opening. The possibility of creating various combinations, also using CS 77 doors and CP 130 sliding systems, as well as Ventalis solutions, makes the CS 77 system successfully applicable to all types of construction, even if the highest safety standards must be met.

Top quality without compromise

Infinite possibilities

The standard product offers a functional design, which means it will fit into any style of building.
A concealed sash is an openable element that looks like a fixed element from the outside, providing greater architectural symmetry and a clean appearance.
The Softline variant was developed with soft and smooth edges in mind.
Full personalization

Product options

Hidden hinges
For good looks, details count, hidden hinges are the best finishing touch.
Concealed drainage
No more plastic caps, enjoy a clean design.
Safety can go hand in hand with beauty.
Glass corner
A combination of two glass panes, without obscuring the view.
Finishing options

Unparalleled range of colors and finish types

Choose from a palette of
450 colors
Choose from a palette of
450 colors

Technical details

Thermal insulation

High Uf = 1.8 W/m²K


High Class 4 (600Pa) / Class E900 (900Pa) / Class C5 (2000Pa)



Burglary resistance

High RC2 - RC3 - Wk2 - WK3 - PAS 24

Wing height

Min 600 mm
Max 2800 mm

Clear frame width

Min 51 mm