Calculation procedures in CEN on energy use for space heating and cooling

The European Energy Performance in Building Directive (EPBD) requires methods for the calculation of the energy performance for use in the context of building regulations.The European Commission has supplied a Mandate (M343,2004) to CEN to develop a series of standards, each covering a part of the calculation of the energy performance of buildings and procedures for the inspection of heating and airco systems.The paper introduces briefly the methods for the calculation of the energy needs for heating and cooling of buildings and the relation with the higher level standards.