The aim of the REGENA research project is the conceptual development and the comparative evaluation of lowinvestment measures for optimising building operation energetically in universities and colleges. Besides an analysis of building technology, emphasis is also placed on environmental psychological consideration of user behaviour. Using a comprehensive monitoring system, the energy consumption of the two participating universities is to be monitored. Additionally, intervention measures to reduce the energy consumption will be organised and evaluated. As a result, a transferable process model (REGENA-Model) will be developed, which will be generally applicable to universities.