The University General Hospital of Patras is the most important healthcare infrastructure at the level of Western Greece supporting a number of citizens over one million The Hospital has an annual energy consumption exceeding two million euros and therefore constitutes a first-class opportunity for energy saving investments in a financially rewarding way This act includes interventions in building and electromechanical works in order to upgrade the energy efficiency A of the three buildings A B and C in which are housed the clinics of Hospital B of building M in which the blood-cleaning unit is housed. reduce the phenomenon of liquefactionWith regard to interventions in these electromechanical installations, the aim is to save energy and reduce energy costs by at least 40 per year in these buildings, as well as to reduce greenhouse gas emissions in a cost-effective way.