Contracting in social institutions

Development of measures to promote energy saving and efficiency contracting in social institutions


The aim is to realise a low-cost, low-risk and comprehensive energy-related refurbishment for social facilities by means of needs-based contracting. For this purpose, a calculation tool for an intelligent quick analysis of the efficiency increase potentials in social facilities is being developed as a decision support and impulse generator for operators and users.

Research Question

In Germany, there is an immense backlog of renovations in social institutions such as hospitals, prevention and rehabilitation centres, nursing homes and other in-patient welfare institutions, although hospitals, for example, are among the most energy-intensive consumers in the service, commercial and retail sectors. In the CoSo project, in cooperation with the operators, experts from the contracting sector and applied research, a practical instrument is being developed which can be used to evaluate renovation measures and their savings potential.


The project comprises five work packages:

Work package 1: Creation of a common platform for project partners and stakeholders.

Work Package 2: Preparation of an overview of social institutions, evaluation with regard to economic and administrative framework conditions and SWOT analysis of contracting solutions

Work package 3: Creation of a calculation tool for the energetic calculation of buildings.

Work package 4: Analysis and modification of energy saving contracting with regard to the use in social institutions

Work package 5: Creation of a new contracting business model.


  • Overview about the situation in the social institution sector (hospitals, rehabilitation centres, nursing/ retirement homes)
    • current building renovation status
    • identify and solve renovation problems
  • Information material:
    • Handout "Bringing social facilities on an energy-saving track with contracting".
    • FAQ "Answers to central questions for project development and sales
    • "Checklist for project development and sales" brochure
  • Online quick calculation tool
    • Users can enter the data of their property (dimensions, use, energy systems, costs, consumption values)
    • Output of benchmark values for consumption and carbon footprint. Comparison with other properties.
    • Basic renovation options and renovation proposals. Costs and economic efficiency of the measures.
    • Best practice examples
    • Further links and tips
  • COSO tool for planners
    • GIS data tool based on the SimStadt platform ( used by contractors for the renovation of social facilities.
ManagementDr. Dirk Pietruschka
PartnerClimate Protection and Energy Agency Baden-Württemberg (KEA BW), German Energy Efficiency Initiative (DENEFF)
FundingFederal Ministry for Economic Affairs and Climate Action
Call for proposalEnEff. building. 2050
Duration01.03.2019 – 28.02.2022 extended until 31.05.2022



Name & Position E-Mail & Telephone
Institutsleiter; Stabstelle Forschung+49 711 8926 2674 7/032
Wissenschaftlicher Mitarbeiter+49 711 8926 2958 7/105