KUBUS – Modern PVC window and door system. 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.

Continuous 100 mm sightline, including in the area of the mullion.


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. Outstanding heat insulation thanks to foam – filled profile chambers. 

The GEALAN-KUBUS® system is also impressive from a functional point of view, above all with respect to the ease of cleaning. In the profile geometry, particular attention was paid to
smooth contours in the frame. The frame stop has no gasket, while a curved central domed gasket is integrated into the frame.