An ideal solution for single-family homes, restaurants, and cafes, it naturally connects the interior with the exterior. The system allows for the creation of multi-leaf structures that open both inward and outward, providing significant design flexibility. The three-chamber profile construction guarantees high structural strength, allowing for the construction of large-sized elements – up to a sash width of 1200 mm or a height of 3500 mm, with a maximum sash weight of 120 kg. High thermal insulation is provided by thermal breaks of uniform width of 34 mm, used in both frames and sashes. Specialized hardware ensures comfortable and reliable use of the system, while a wide glazing range from 22 to 60 mm allows for the use of both standard and specialized glazing units. The system offers considerable freedom in selecting threshold solutions and the ability to combine them with other PROCURAL PE78N solutions. An additional advantage is the compensation profile, which eliminates any possible production and assembly inaccuracies, enables adjustment and stress reduction regardless of external conditions, and thanks to the adjustment range from 0 to 5 mm, it is particularly recommended for very wide structures.