scope:

The calculation methodology follows the framework set out in the Annex to the EPBD. The various standards used in this process are listed in Annex A. Many of the standards deal with specific aspects of the calculation (e.g. fabric losses, air changes, energy use for lighting, system performance): these aspects are drawn together in the following items. The main goal of these standards is to facilitate the implementation of the Directive in Member States. In consequence they do not prescribe a single definition of energy rating or the expression of energy performance, but rather give a limited number of options. Similarly the items on inspections offer various levels of inspection. It is up to national bodies to select one or more of the options given, depending on the purpose of the calculation and the type and complexity of the buildings and their services.