An energy audit basically consists of an analysis of the energy usage within a building or facility and its contained equipment to assess how much energy the building and its users consume and to evaluate what measures can be taken to make it more energy-efficient. In order to be able to test GreenSoul in other pilots in the future, the implementation of an energy audit was necessary in order to be able to make statements about energy savings. For the standardization of GreenSoul, the standardized calculation of energy savings is of great importance.

A standardized energy audit was carried out before GreenSoul installation in the GreenSoul project. An energy audit is necessary to capture the energy needs of all consumers (heat, cold and electricity) under standardized conditions. Since the GreenSoul system was sometimes not used in the hole area of the pilots, but measured energy data was sometimes only available for the entire building, the impact of GreenSoul cannot be directly calculated. Furthermore, the measured energy data were often only available on an annual basis or similar resolution. Since the pilots were only a few months in operation during the research project, calculating the direct energy benefits of GreenSoul was further complicated. Furthermore, many energy data depend on the weather, the number of people in the buildings, or other factors. The problem can be solved by creating a baseline based on the standardized energy audit.