The F4-Elite folding glass doors system is a high-performance system, designed specifically for cold climates and generally demanding environments. It is a more sophisticated version of the F4 system, offering even better sound insulation and lower thermal conductivity. It consists of double-glazed panels, framed with aluminum profiles for extra insulation and durability in demanding environments. The vertical profiles of the aluminum frames are designed with a male/female cross section logic, so that they fit with each other perfectly, leaving no intermediate gaps. The bottom aluminum frames have rubber seals to ensure a completely airtight and watertight result. The horizontal aluminum profiles also have rubber seals that guarantee a tight fit. An additional aluminum profile is installed between the wall and aluminum panels for even better insulation and a better aesthetic result. On every frame, a lock mechanism is installed at about the height of 1m - so that the user avoids bending down to secure the panel with floor locks. Each pane can be turned into an opening/divertible door, used as an entrance once a roof spring mechanism is fitted in. Such entrances can be both single and double winged, while an additional mechanism can be added to gently pull the wing back in position after opening. The available options of the aluminum guide are either standard type with a cross section of 60x53mm or heavy type with a cross section of 75x72mm, depending on the requirements of the project.