Implications of cost optimum calculations on energy performance requirements in Member States

This report summarises the work done within the Concerted Action Energy Performance of Buildings Directive (CA EPBD) from January 2011 to May 2014 in order to meet the European Commission's requirement for calculating cost-optimal levels of buildings’ energy performance for new and existing buildings. The requirement for performing the calculations is stated in the Directive on the Energy Performance of Buildings (recast) 2010/31/EU1. The calculation procedure is outlined in the comparative methodology framework2 for calculating cost-optimal levels of minimum energy performance requirements for buildings and building element.