For climate-technical considerations in winter the U-value is the most essential property of glazing. The lower the U-value, the smaller the energy requirements will be.

Another advantage of a lower U-value are higher surface temperatures on the inside window panes improving thermal comfort.

LIF can reduce the U-value of the double-glazing and therefore the heat transfer by about 30%, when installed correctly.

The right distance of the acrylic profiles to the outer pane is very important for this positive effect.

The diagram shows that the difference between the U-values at a distance of about 7 mm from the outer pane is as follows: