KF 520 UPVC
The new 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 (in W/m2K)
Uw as low as 0.63
Sound reduction (in dB)
33 - 46
Up to RC2, RC3
Construction depth (in mm)
Test Certificate Available
The thermal insulation of a window depends on the frame material, the glazing and the impermeability. The parameter is the U value – the lower the figure, the better the thermal insulation.
The soundproofing of a window depends on the frame material, the glazing and the joint permeability. The parameter is the dB value – the tighter a window closes, the better the insulation performance.
|Uw =||Thermal insulation of the window acc. to EN 10077-1 (calculated) or acc. to EN 12567-1 (tested) (is stated in watts per square metre kelvin = W/m2K); the following tables state this value per Internorm window system – with stainless alu or ISO spafers respectively|
|Ug =||Thermal insulation of the respective glazing|
|Rw =||Soundproofing of the window acc. to DIN EN 20140-3 (stated in decibel = dB)|
Triple GlazingUPVC Windows
|Glass||Glass code||U g/R w||g %||ALU||ISO|
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This architectural style is very puristic in its design. Clear shapes and minimal design are typical. The minimalistic living style is reduced to the basics.
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