which includes the efficiency of generation (boiler's efficiency), distribution, regulation and emission (terminals). The global seasonal efficiency is between 65% and 70%, as far as the prescribed limit values established by Italian laws on energy consumption [12] ( g l). The average power installed is about 40 W/m3. We can also note that in the latest districts (from XV to XX) there are significant inconsistencies in official data that can be indicative of mistakes in energy label's redaction or of serious shortcomings in terms of management for these buildings.