The energy performance certificate of a building is a technical document for information purposes that certifies the energy performance of that building.
In the European Union, the EC Directives 91/2002 and 31/2010 regulate the obligation that all the building categories must have energy certificates to show the energy consumption efficiency. Such directives apply to all the members states and also to those in the accession process.
The simplified methods for calculation of the heat requirements are based on the European Standards EN 832 and EN ISO 13790, which were designed to unify the concept of energy consumption in the building sector and to compare the performances thereof.
In Romania the obligation to obtain the energy certificate is set out in the Law no. 372/2005 on the building energy performance and the Order no. 1459/2007 approving the Methodological Rules on the energy performance of buildings, issued by the Ministry of Development, Public Works and Housing.
The energy performance certificate can be issued as a result of an energy audit process conducted with the purpose of selling and buying, of leasing or for the purpose of thermal refurbishment and upgrading of the building.