109 STH. is a premium product that offers excellent thermal insulation performance. It is a tilt-and-turn system with a special polyamide thermal insulator, designed to meet a wide variety of functional and aesthetic requirements, complying with the highest standards in construction and energy efficiency. The system is engineered to provide excellent protection against heat and cold, maintaining a comfortable indoor climate throughout the year while also reducing external noise transmission. 109C S.th. stands out with a linear design and a 34 mm polyamide thermal break, delivering significant energy savings and lowering heating costs. The system allows for the installation of a multi-point perimeter locking mechanism, ensuring a high level of security.