New simplicity in design

The GEALAN-KUBUS® system defines a new design idiom for vinyl windows in architecture. It offers large expanses of glass for more light and transparency, and greater design freedom. On the inside, the new system boasts a flush sightline with no distracting joins. On the outside, its rectangular upstand emphasises the harmonious overall impression.

Square and almost invisible

The system dimension for both the frame/sash combination and the mullion is 100 mm. This means that the mullion and lateral frame parts have the same visible width, resulting in symmetry and an aesthetic appeal.


100 mm – the measure of all things
“Perfection is not attained when you have nothing more to add but rather when there is nothing left to take away.”

Antoine de Saint-Exupéry

No glazing bead
Installation depth and visible width of 100 mm for the frame/sash package and the mullion
Flush interior view
Clean contours