BS EN 15217:2007 Energy performance of buildings. Methods for expressing energy performance and for energy certification of buildings
This European Standard specifies:
a) overall indicators to express the energy performance of whole buildings, including heating, ventilation, air conditioning, domestic hot water and lighting systems. This includes different possible indicators;
b) ways to express energy requirements for the design of new buildings or renovation of existing buildings;
c) procedures to define reference values;
d) ways to design a procedure for building energy certification.