In the warmer months, solar energy is converted into cooling energy. For this purpose, a solar-powered absorption refrigeration unit is used, which converts solar energy from the solar collectors on the roof into cooling energy using heat exchangers. This makes it possible to cool the living spaces in an environmentally friendly way: the heat generated by the vacuum tube collectors is transferred through a buffer tank with heating water to the generator of the absorption refrigeration unit. In order to avoid unwanted vaporization on the surfaces of the collectors and in the surrounding space, the heat is dissipated through a closed hybrid cooling tower. In addition to extensive glazing, a large part of the façade is also enclosed. In this way, wall panels not only reduce heat loss in winter, but also serve as an important heat storage device to ensure a comfortable indoor environment.