CS 104

CS 104

Concept System 104 'High Insulating plus' aluminium door

Solution for low energy constructions

Concept System® 104 includes a high performance door system, to offer the most insulating aluminium door system available. Its exceptional high insulation level, combined with an extremely good water- and air tightness, allows the flush door with an insulating panel to pass all tests for achieving a Passive House component certificate. This flush door system is perfectly suited for passive house or low energy constructions. 

The extreme insulation levels are achieved by a patented technology, in which insulation strips with increased stability are combined with a special foam in a way that no extra manipulation is needed during the production. This guarantees a constant quality of the assembled element. 

The high performance levels with regard to water- and air tightness makes the CS 104 flush door system perfect for extreme environments as in coastal areas and high altitudes. Furthermore, this system can comply with burglar resistance class 2, offering a safe and secure door.



Between countries, there are differences in how a window is placed into the wall. For more information on the usage of Reynaers BIM models, download the BIM guidelines.


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: inward opening82 mm 
Min. Visible width vent: inward opening76 mm 
Min. Visible width frame: outward opening46 mm 
Min. Visible width vent: outward opening102 mm 
Min. Visible width T-profile99 mm 
Overall system depth frame95 mm 
Overall system depth vent104 mm 
Rebate height25 mm 
Max. Glass thickness65 mm 


Air tightness max. test pressure3 (600 Pa)
Water tightness7A (300 Pa)
Wind load resistanceC
Burglar resistanceRC 2/WK 2

Opening elements

  • Inward Opening Double ZT DoorInward Opening Double ZT Door
  • Inward Opening Single DoorInward Opening Single Door
  • Outward opening double ZT doorOutward opening double ZT door
  • Outward opening single doorOutward opening single door
  • Panic single doorPanic single door