CS 68 Hidden Vent

CS 68 Hidden Vent

Concept System 68 'Hidden Vent' window

Universal solution

Concept System® 68 is a universal window system, with good performances regarding stability, thermal insulation and security. The system is available in two aesthetic styles: Functional and Hidden Vent — this way the windows can match your building style perfectly.

The window system offers a range of solutions for inward and outward opening windows and is compatible with the Ventalis® ventilation units. In addition, CS68 windows can comply with burglar resistance classes 2 and 3, offering an ultimate level of security.


Technical information


Min. Visible width frame: inward opening76 mm 
Min. Visible width frame-vent: inward opening76 mm 
Min. Visible width T-profile101 mm 
Max. height vent2400 mm 
Max. width vent800 mm 
Max. weight vent (element)120 kg 
Overall system depth frame59 mm 
Overall system depth vent63.5 mm 
Rebate height18.5 mm 
Min. Glass thickness12 mm 
Max. Glass thickness40 mm 
Min. Glass thickness vent12 mm 
Max. Glass thickness vent40 mm 


Air tightness max. test pressure4 (600 Pa)
Water tightnessE750 (750 Pa)
Wind load resistanceC4 (1600 Pa)
Acoustic performance44 (-1;-5) dB
Thermal insulation (Uf)2,6 W/m²K

Opening elements

  • Fixed WindowFixed Window
  • Inward opening combined elementsInward opening combined elements
  • Inward Opening TiltInward Opening Tilt
  • Inward Opening TurnInward Opening Turn
  • Inward Opening Turn TiltInward Opening Turn Tilt