Danish participation in IEA EBC Annex 71

In order to reduce the energy use of buildings, more stringent requirements on energy performance of buildings are realized, and the use of renewable resources. Most compliance checks and labelling of the energy performances are done in the design phase by calculating the theoretical energy use, however monitoring of actual energy performances reveals in many cases a significant gap with theoretically designed targets. A better prediction, characterization and quality assurance of the actual building energy performance is essential to realize the world wide intended energy reduction in building communities and systems. Quantifying the actual performance of buildings can only be effectively realized by in-situ measurements combined with statistical techniques. In the Annex the aim is to make the step towards monitoring in-use buildings to obtain reliable quality checks of buildings to guarantee that designed performances are obtained on site. The aims will be achieved by supporting the development of replicable characterization and quality assurance methodologies - embedded in a statistical and building physical framework to characterize and assess the actual energy performance. A large part of the efforts will be focusing on analysis methods for disaggregating the building energy use to its three main sources: building fabric, systems and users.