Principles and performance:

Energetic effect:

Improved heat insulation properties (reduced heating costs):
U-value to vary between approx. 0,69 W/m2K - 1,47 W/m2K

High degree of total diffuse energy penetration (saving on 
heating and lighting costs): 
g-value to vary between approx. 49% and 61%

In consequence improved total energy balance (equivalent U-value):

Ueq - value (south):            between approx.   - 0,48  and  + 0,01 W/m2K
Ueq - value (west/east):      between approx.    - 0,11  and  + 0,47 W/m2K
Ueq - value (north):            between approx.  + 0,23  and  + 0,90 W/m2K

Illumination effect: 

Improved depth as well as uniformity of room illumination

Cross section:

Daylight simulation: