Wind of Renewal Energy Policy Group (EPG) Habitat for Humanity International Hungary Non-profit LLC (HFHI HU) PNEC – Association of Municipalities Polish Network „Energie Cités“ adelphi research gGmbH Ecologic Institute gGmbH Energiaklub Climate Policy Institute and Applied Communications Association (Energiaklub) Buildings Performance Institute Europe ASBL (BPIE) Foundation Center for Energy Efficiency EnEffect Energy Cities Romania/ OER