System of increased thermal insulation. Owing to three-chamber thermal break, chamber central seal and special glazing seals the system achieves coefficient UR < 2.0 W/m2K (material group 1.0 according to standard DIN 4108). The depth of window frames and profiles for fixed installation equals 75 mm. The depth of window leaves is 84 mm. Superial system relies on accessories (corners, T connectors) as well as glazing beads and fittings from other systems with thermal insulation. The system ensures very good acoustic properties. It is possible to use filling 14-61 mm thick.