ES 50

ES 50

Eco System 50 aluminium window

Where ecology meets economy

ES 50 is a well-insulated inward and outward opening aluminium window, that combines aesthetic design and energy efficiency at a moderate price. The window’s limited built-in depth allows its application in many constructions, even with reduced wall thicknesses. 

As well as offering the standard functional finish, ES 50 offers special block profiles resembling wooden frames. The use of hidden fittings result in an elegant look as hinges are no longer visible. 

The ES 50 window can comply with burglar resistance class 2, offering a safe and secure solution both for residential constructions and utility buildings.

Secured by Design option available 



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 opening48 mm 
Min. Visible width vent: inward opening30 mm 
Min. Visible width frame-vent: inward opening86 mm 
Min. Visible width frame: outward opening21 mm 
Min. Visible width frame-vent: outward opening99.5 mm 
Min. Visible width T-profile70 mm 
Max. height vent2200 mm 
Max. width vent800 mm 
Max. weight element120 kg 
Overall system depth frame50 mm 
Overall system depth vent59 mm 
Rebate height22 mm 
Min. Glass thickness12 mm 
Max. Glass thickness32 mm 
Min. Glass thickness vent4 mm 
Max. Glass thickness vent32 mm 


Air tightness max. test pressure4 (600 Pa)
Water tightness9A (600 Pa)
Wind load resistanceC4 (1600 Pa)
Burglar resistanceWK2
Thermal insulation (Uf)2,2 W/m²K

Opening elements

  • Fixed windowFixed window
  • Inward opening combined elementsInward opening combined elements
  • Inward opening double casementInward opening double casement
  • Inward opening third ventInward opening third vent
  • Inward opening tiltInward opening tilt
  • Inward opening tilt turnInward opening tilt turn
  • Inward opening turnInward opening turn
  • Inward opening turn tiltInward opening turn tilt
  • Outward opening combined elementsOutward opening combined elements
  • Outward opening double casementOutward opening double casement
  • 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
  • Round window vertical openingRound window vertical opening
  • Thermo frontThermo front
  • Thermo front double casementThermo front double casement