CONGREGATE – Consumer Engagement in building renovation and renewable energy cooperatives for grassroot climate action

Međunarodni projekt • Aktivan projekt

Project duration: 1.11. 2020. – 31.3.2023.

Project code: 17.9045.0-002.79, Contract no. 81263393

Link to the external project page: nema unosa

Project lead:

Department(s) at the Faculty:
Department of Materials

Project manager at the Faculty:
doc. dr. sc. Bojan Milovanović

Lead institution:
Center for Energy Efficiency EnEffect, Bugarska


Institute for Zero Energy Buildings INZEB, Greece
Sveučilište u Zagrebu Građevinski fakultet, Croatia
The Energy Efficiency Center SEVen, Czech Republic
Cluster pRO-nZEB, Romania
Center for the Study of Democracy, Bulgaria


prof. dr. sc. Ivana Banjad Pečur
dr. sc. Marina Bagarić
Mergim Gaši
Sanjin Gumbarević
prof. dr. sc. Nina Štirmer
Zvjezdana Matuzić


Source of funding:
European Climate Initiative (“EUKI”) 2020, , German Federal Ministry for the Environment, Nature Conservation and Nuclear Safety (BMU)


Energy efficient renovation and encouraging “prosumer” behaviour though energy cooperative are proven measures that support the sustainable energy transition. However, neither building renovation programmes nor the creation of energy cooperatives are usually accompanied by adequate communication campaigns. This makes these successful practices invisible to both citizens and potential investors.

To promote interest and participation in building renovation and in the creation of energy cooperatives, the project combines two distinctive actions.

First, it develops a communication strategy to support national building renovation strategies in Bulgaria, Croatia, and Romania and organises at least 28 events to promote this strategy. For each country, the project monitors and analyses how current renovation programmes impact residents’ energy and financial savings as well their behaviours and attitudes. Results from this study inform future national campaigns for civic engagement in building renovation programmes.

Second, the project promotes the establishment of public-private renewable energy cooperatives in Bulgaria, Greece, and the Czech Republic. To do so, it conducts three case studies per country and supports feasibility studies in the involved municipalities. The project then organises at least 19 events to raise awareness for the results of the studies.