CS 104 Aluminium Windows and Doors

The Concept System 104 window and doors are an elegant product with industry-leading thermal insulation that meets the requirements for Passivhaus standards.

Passivhaus is a set of rigorous efficiency standards aimed at producing ultra-low energy homes that is growing ever more popular with discerning house owners. This makes the CS 104 the perfect solution for any new build or renovation project where energy conservation is vitally important.

This thermally efficient engineering does not compromise on style, it is still possible to fit huge panoramic windows and doors to create a striking feature with optimum views to bathe your home in natural light. The CS 104 range of aluminium window frames will surely fulfil any requirement you might have to make your energy efficient dream home a reality.



Concept System 104 windows and doors have the freedom to design large expansive glass areas, resulting in innovative, energy-efficient building designs.

  • Patented insulation technology
  • Weather resistance
  • Double- and triple-glazed options
  • Inherent strength
  • U-value as low as 0.77W/m2K

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Interested in Reynaers at Home products?

If you are interested in any of the Reynaers at Home aluminium systems for your home project, we have a network of dealers throughout the UK that can advise on product choice and installation. Select one of the options below to find out more:

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