European Regulation has established a methodology for calculating cost-optimal levels of minimum energy performance for buildings and building elements, leaving considerable space for a flexible implementation.

To provide additional and concrete guidance to policy makers at national level, BPIE has conducted additional analysis on how to effectively implement the cost-optimality methodology in European Member States.

The objectives of the studies are to demonstrate how ambitious yet affordable cost-optimal energy performance requirements for buildings can be defined and how the transition towards nearly Zero-Energy Buildings can be supported. BPIE presents three national cases: Austria, Germany and Poland.