This standard provides a systematic, comprehensive and modular overall structure on the integrated energy performance of buildings, in order to ensure consistency among all CEN standards required to calculate the energy performance of buildings according to the EPBD (2010/31/EU). This standard handles the framework of the overall energy performance of a building, covering inter alia: a) common terms, definitions and symbols; b) building and system boundaries; c) building partitioning; d) methodology for calculating the energy performance of a building (set of overall formulae on energy used, delivered, produced and/or exported at the building site and near-by); e) set of overall formulae and input-output relations, linking the various elements relevant for the assessment of the overall energy performance of buildings which are treated in separate standards; f) general requirements to standards dealing with partial calculations; g) general rules in setting out alternative calculation ro
