System with improved thermal insulation and very good acoustic properties. UR<2.0 Wm2K (the DIN 4108 standard 1.0 frame group) Profile depth is 75mm and 84mm of window sashes.
- fixed frames for double glazing
- single or double sash, side-hung, open-in windows
- tilt&turn windows, tilt&slide windows and doors
- residential doors are open-in only