The M20650 is the most economical option of an open insulating system with a heat transfer coefficient Uf = 3.2 W / (m2K). The frame is designed to completely cover the Sash , so there are no visible joints on the outside of the frame. Particular emphasis has been placed on high-strength PVC double extruded lath, which prevents heat transfer to and from the outside.
The M20650 offers the option of using a special Sash for either a 16mm steel perimeter or a classic Euro groove. The system is certified by EKANAL.