Center for the Study of Democracy (CSD Bulgaria) North-West Croatia Regional Energy Agency (REGEA) The Romanian Network of Energy Cities / OER PNEC – Association of Municipalities Polish Network „Energie Cités“ adelphi research gGmbH Ecologic Institute gGmbH Energiaklub Climate Policy Institute and Applied Communications Association (Energiaklub) ideas into energy gGmbH Buildings Performance Institute Europe ASBL (BPIE) Energy Cities Romania/ OER