Smart City Salzburg – Energy Efficiency in Public Buildings

In public buildings, a potential for electrical energy savings of about 5 to 15% is expected. Building on the existing energy control system of the city of Salzburg, measures are planned to optimize power consumption in public buildings through efficient methods of analysis. On the basis of 20 test buildings, the methodology used is tested and optimized. From the findings, building type-related targets and measures are derived to achieve these figures.

The city of Salzburg has for many years run a successful role model monitoring plan. In about 300 public buildings, owned by the city, the consumption of electricity, water, and heat is monitored daily with a separate energy control system. In recent years, this resulted in a significant reduction in heat consumption. On one hand, it was possible to respond very quickly to disturbances; on the other hand, based on the available information, priorities in the redevelopment budget were determined.

While reduction in the demand of heat has been on a successful path, not least through information, building code requirements and renovation priorities, great electricity savings still prove elusive. But with regard to the increased use of electricity (IT, lighting, ventilation), consumption levels have remained constant and that should be seen as a success.

However, in order to follow a similar successful path in the coming years as seen with heat, it is not only necessary to know the energy consumption structure (proportion of lighting, IT, auxiliary power for ventilation, heating, and hot water) but also what electricity savings are available, technically and organizationally. To avoid expensive power analyses of individual buildings, the possibility of a standardized method of analysis of existing data from the energy control system should be explored for selected objects. These results will be allocated in target values ​​that specify the path for electricity savings. Target values ​​are to be calculated as examples from selected objects.

The explorationserves the city of Salzburg as a basis for a more extensive planning of a power saving focus for public buildings. In a next step, the results are used for the planning of a demonstration project for a significant reduction in electricity demand in public buildings. In doing so, the proposed target values ​​and the context of the proposed measures in terms of their plausibility are reviewed.

Project data – Exploration project of the 3rd Call 2012
Project start: 11/01/2013
Project end: 02/28/2015
Approved funding: € 60.198,–
Total project costs: € 118.202,–


Stadt Salzburg, 6/00 Energie und Smart City Koordination (Consortial leader)
SIR – Salzburger Institut für Raumordnung und Wohnen
e7 Energie Markt Analyse GmbH


Project lead

Ing. MSc Franz Huemer
City of Salzburg

Tel: +43(0)662 8072-2484