KF 520 combines innovative design with technical know-how. The window sash is not visible from outside due to its glass appearance and can optically not be distinguished from fixed glazing. This sash also contains the revolutionary locking I-tec Secure which renders levering of the window impossible - unrivalled in the branch. Integrated flaps press on all sides into the frame interior when locking and thus ensure maximum burglary protection.
- Thermal insulation: Uw up to 0,63 W/m²K
- Sound reduction: 33-46 dB
- Security: up to RC3, RC2
- Locking: fully integrated
- Frame construction depth: 90 mm
- View width frame/sash: 85 mm
- View width flying mullion (2 sashes): 96 mm
- View width transom/mullion (2 sashes): 148 mm.
UPVC is a real marvel of materials
It is affordable, easy to care for, durable, insensitive to moisture and has low conductivity. No surprise that this material is in use in various areas - and also in UPVC window construction.On the one hand, UPVC when heated up is extremely flexible and therefore facilitates varied window shapes such as triangular UPVC windows or round and pointed arches. Once this material is hardened, it is however very robust. Thus, UPVC windows are hardly affected by weather conditions, making maintenance an easy task. Also humidity, such as occurs e.g. in wet rooms, does not affect the UPVC windows. Thermal insulation is excellent due to the low conductivity. Profile cavities and insulation with UPVC windows additionally improve thermal insulation.
UPVC windows
We have been using UPVC for many decades to manufacture our windows and count among the most innovative UPVC window manufacturers in Europe. We not only produce the UPVC profiles in our manufacturing facilities, we also put them into the required shape. We can guarantee you high quality UPVC windows 100% made in Austria. We can also produce your bespoke UPVC windows.We will offer you diverse models in many different design versions, however, one factor always remains the same: I-tec glazing. All Internorm UPVC windows are equipped with this all round bonding of the glass pane with the window sash. Thus, stability, thermal insulation, sound protection, burglary protection and functionality of the UPVC window are considerably improved.
