Comparative Study of Energy Regulations for Buildings in Italy and Spain

In this study the Italian and Spanish national regulations related to the transposition of Directive 2002/91/EC on energy efficiency in buildings are compared. Three typical buildings were selected for thecomparison: a semidetached house, an independent house and an apartment. These buildings werelocated in different climatic zones of each country and simulated with different orientations. The energystandards in Italy, Decree 192/05, valid for years 2006, 2008 and 2010, and in Spain, the Co´ digo Te´ cnico deEdificacio´ n, were also compared with the German standard called Passivhaus. The contribution to totalenergy demand of winter and summer energy demands was evaluated, along with a statisticaldistribution of the consumptions for the various climatic zones and orientations. The increase in theenergy consumption limitations in Italy over the years was also analysed. The results show that the leastrestrictive Italian regulation, i.e. the one valid for the year 2006, is more restrictive than the Spanishregulation.