The KELLER minimal windows® line includes a variety of high-tech elements for the most diversified needs. Sliding doors and windows with thermal break, broad dimension glass panes and ultra-thin profiles, totally embedded in the walls, ceilings, floors in full co-planarity, guarantee a top-level performance in terms of both energy efficiency as well as thermal and acoustic insulation, enabling an incredibly comfortable opening and closing, easy and silent, even for the broadest surfaces, using technological solutions so far unique on the market.