Verification of the new Ministerial Decree about minimum requirements for the energy performance of buildings

The Italian Ministerial Decree 26/06/2015 specifies the requirements of nearly zero-energy buildings (nZEBs) and demands that the energy performance of the new building is compared with that of a reference or target building, which has the same location, function, size, but reference insulation level and technical systems efficiencies. The research aims both to investigate the technical feasibility of design solutions complying with the legislative requirements and to verify the reference building approach. The analysis is applied to a residential building in three Italian climatic zones. The calculations are conducted by means of quasi-steady (UNI/TS 11300) and dynamic (Energy Plus) methods.