| European Institutions | European Parliament |
| European Commission DG Research | |
| European Commission DG Energy | |
| European Commission DG Environment | |
| European Commission DG Climate | |
| EEA – European Environment Agency | |
| JRC – Joint Research Center | |
| Information Centres and Databases on CHP | AEBIOM |
| EBA | |
| EREC | |
| EUBIA | |
| EURELECTRIC | |
| EUROGAS | |
| FEDARENE | |
| MARCOGAZ | |
| CORDIS | |
| European Institute of Environmental Energy | |
| EURlex | |
| International organisations | IEA – International Energy Agency |
| European Electricity Association | |
| ECEEE – European Council for an Energy Efficient Economy | |
| Financial Institutions | EBRD – European Bank for Reconstruction and Development |
| EIB – European Investment Bank | |
| World Bank |