DOCUMENTOS RECONOCIDOS PARA LA CERTIFICACIÓN DE LA EFICIENCIA ENERGÉTICA DE EDIFICIOS EXISTENTES MEDIANTE EL MÉTODO SIMPLIFICADO: COMPARATIVA MEDIANTE CASOS REALES

Abstract

Since the approval of the European Directive 2002/91/EC on the Energy Performance of Buildings (EPBD), the recast in the Directive 2010/31/EU, and their partial transposition in Spain by the Royal Decree RD 235/2013 that approves the basic procedure for certification of energy efficiency in buildings, several documents destined to simulate the energy efficiency in buildings have been developed. This study has selected 43 buildings with different characteristics in terms of geometry and constructive solutions. Their energy certificates were obtained by the three documents currently recognized in Spain for the simplified procedure for energy certification in buildings: (i) CE3; (ii) CEX; and (iii) CERMA. The comparative analysis has included parameters such as energy demand, primary energy consumed, energy rating of the whole building, and CO2 emissions. In addition, these parameters have been analyzed according to the purpose of the energy consumed: heating, cooling, or domestic hot water (DHW). The data analysis reveals that there are differences in the data outputs among the documents recognized for the same building, thus affecting not only the results regarding the energy consumption and greenhouse gases emissions, but also the energy rating obtained, which is the image of the level of energy efficiency of the building.