This International Standard sets out ways of expressing the energy performance in an energy performance certificate of a building (including the technical building systems) and ways of expressing energy performance requirements. This includes an overall numerical energy performance indicator and classes against benchmarks.
This International Standard additionally includes numerical indicators at system or component level.
This International Standard defines the different types of rating (such as calculated, measured, design,and tailored rating) and the energy uses to take into account (such as heating, cooling, domestic hot water, ventilation, and lighting).
