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The CA conducted a study on experiences and challenges for setting cost optimal levels for energy performance requirements. The results were used as input by the EU Commission in their work of establishing the Regulation on a comparative methodology framework for calculating cost optimal levels of minimum energy performance requirements.
The following text summarizes the provisions of the EPBD recast text regarding calculating and achieving cost-optimal requirements:Methodology to calculate cost-optimal levelsThe Commission shall have established by June 2011 a comparative methodology framework for calculating cost-optimal levels of minimum energy performance requirements for buildings and building elements (e.g. the roof of a building). The comparative methodology framework shall require Member States to: