The EPBD Directive (in article 11(9)) requires the Commission to adopt, in consultation with the relevant sectors, a voluntary common European Union certification scheme for the energy performance of non-residential buildings.
In 2011, the Comission launched a call for tender: ENER C3-508 “Voluntary common EU certification scheme for the energy performance of non-residential buildings” for the technical development of the European Voluntary Scheme. The proposal from the consortium lead by CSTB (Centre Scientifique et Technique du Bâtiment) France was selected in the tendering process.
Among the tasks was the definition of a performance scale for the Energy Performance Certificate. This document is a first contribution of the consortium on the definition of a performance scale. It was requested that the performance scale could be used all over Europe.
In national schemes the scale is often defined in classes related to energy consumption (kWh/(m2a)). This type of scale using absolute values will not allow a European wide use without corrections (i.e. climate, uses, and internal gains). Even within the same countries, using this type of scale requires several variations adapted to climate zones, uses etc.
The proposed scale is based on comparison of a “real” building with a reference.
In the existing standard EN 15217, two reference points are used to set the scale.
In this proposal, only one explicit reference point is needed due to the chosen shape of the scale.