KF 410 UPVC
The KF 410 is a modified and the most adaptable version of UPVC window as it can be obtained from three different frames depending on the structural needs. The square-edged, absolutely flush transition of the frame and sash combines KF410 to one unit. The narrow squared-edged remains only visible when the frame is rendered into wall on three sides. It offers considerable thermal insulation due to the new I-tec insulation incorporated all-round the frame. KF410 can be designed and integrated with I-tec ventilation frame system which ensures adequate fresh air and ideal room temperature 24 hours a day.
Thermal insulation (in W/m 2K)
U w as low as 0.62
Sound reduction (in dB)
up to 45
Construction depth (in mm)
Test Certificate Available
Passive House Certified
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.
|U w =||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|
|U g =||Thermal insulation of the respective glazing|
|R w =||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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