The EEG is working on regional and municipal energy development plans based on energy efficiency improvements, renewable energy systems, information and education to ensure more rational use of energy. These plans are developed for residential buildings, for industrial applications and for the service sector. Of special interest is the economic and ecological optimisation of space heating fuels in residential homes. Moreover, emphasis is put on setting up detailed and comprehensive databases by fuel and end uses. This work is conducted in international co-operations, e.g. with the European Statistical Office EUROSTAT. Moreover, various software packages for energy consulting have been developed in this area of research.