CS 24-SL

CS 24-SL

Concept System 24 'Steel Look' window

Ultimate elegance

Concept System® 24-SL is a thermally insulated system for outward opening windows that combines ultra-slim design, stability and ease in production. The system’s slender exterior contours and specially designed glazing beads give it a steel look & feel. 

This in combination with the excellent insulation level makes CS 24-SL not only suitable for new-build houses, but also for renovations of steel-framed windows, residential constructions, schools and utility buildings. 

The standard outward opening types can be applied in numerous combinations in line with the needs of the building. The window system perfectly matches the CS 24-SL door system. A unique aspect is that this slim system can also comply with burglar resistance class 2, offering a safe and secure solution.


CAD drawings

The Architect Catalogue (PDF) contains information and filenames of the individual CAD files. Please consult this document to find the required CAD files for every section.

Technical information


Min. Visible width frame: outward opening19 mm 
Min. Visible width frame-vent: outward opening50 mm 
Min. Visible width T-profile13.9 mm 
Overall system depth frame85 mm 
Overall system depth vent85 mm 
Rebate height14 mm 
Min. Glass thickness17 mm 
Max. Glass thickness29 mm 
Min. Glass thickness vent17 mm 
Max. Glass thickness vent29 mm 


Air tightness max. test pressure4 (600 Pa)
Water tightnessE750 (750 Pa)
Wind load resistanceC3 (1200 Pa)
Burglar resistanceWK2
Thermal insulation (Uf)3,3 W/m²K

Opening elements

  • Fixed windowFixed window
  • Outward opening combined elementsOutward opening combined elements
  • Outward opening Top hungOutward opening Top hung
  • Outward opening top hung with friction staysOutward opening top hung with friction stays
  • Outward opening TurnOutward opening Turn
  • Outward opening Turn with friction staysOutward opening Turn with friction stays
  • Round window fixedRound window fixed
  • Round window horizontal openingRound window horizontal opening

More solutions