Introducing cost-optimal levels for energy requirements

The recast of the Directive on the Energy Performance of Buildings (EPBD) states that Member States (MS) must ensure that minimum energy performance requirements for buildings are set “with a view to achieve cost-optimal levels”, and that the cost-optimal level must be calculated in accordance with a comparative methodology. The ultimate goal of this is to achieve a cost-optimal improvement of buildings’ energy performance (new and existing) in reality.