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