The Kömmerling 70 and 76 front door system offers you all the advantages of a high-quality inward-opening front door. The high impermeability of the five-chamber system protects you optimally from cold and heat. The entrance door of the Kömmerling 70 and 76 system also has a high basic security. Large reinforcements form a solid, closed unit. The corners of the wings are additionally reinforced with the help of weldable corner connectors, which are connected to the reinforcement. Reinforcements of large dimensions form a solid, closed unit. They block the forces of bending and torsion, for example when trying to break in – and dismantle it over the entire rotating steel frame. With a special fitting, you can further increase safety.