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Building sector and facilities account for aproximately of 40% of primary energy in the European Community, so European regulations have tried to influence the energy consumption in buildings.

Energy Certification of Buildings is a derived demand of the 2002/91/CE Directive. Its main objective is the energy efficiency of buildings and obliges member states to any building to be accompanied by a certificate of energy efficiency. This Directive was transposed through the RD 47/2007 for which approves the energy efficiency certification of new buildings in addition to the CTE and RITE.

This label represents the energy certification (from A, more efficient buildings, to G, less efficient buildings) along with the estimated energy consumption and associated CO2 emissions. Along with the letter, shows the annual CO2 emissions and primary energy consumption.