Table 4 gives an overview of the main benchmarks 2 of newer buildings in Luxembourg from the three main building groups previously mentioned. Passive and low-energy schools save a noticeable level of thermal end energy (up to 70%) compared to standard buildings. The rising electricity consumption minimizes however the positive effect of the new building design, and the average primary energy saving potential measured achieves only 17-37%. Furthermore, the most energy-efficient Luxembourg school buildings consume 50% less primary energy than the mean value of all new school buildings. These promising results show that saving energy is possible and that there is still an enormous energy saving potential in the building sector