The above-mentioned systems are to be supplied and installed in order to achieve a reduction in primary energy consumption in the building complex in such a way that it is upgraded to the energy class A++. The energy upgrading of the building infrastructure, which will lead to a reduction in operating costs and air pollution, as well as improving the internal comfort conditions for the employees and visitors of the building. Finally, due to the emblematic nature of the building and its particular use, its energy upgrade enables wider sections of the population to raise awareness and improve their energy behaviour.