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The windows have a straight, geometric shape and slender lines. The unusual way of opening to the outside guarantees more than just extraordinary tightness.It also allows for free arrangement of space around the window, as the sashes do not take up space inside.

Overall U-value:
0,92 W/m2K
Acoustic value:
32 - 40 dB (depending on the glazing unit)
Water-tightness class:
Class E1050
Class of air permeability:
Class 4
Resistance to wind load:
Class C2 - C4