| Health You Initiative (HYI) | Other Organization Type |
| HEDON Household Energy Network | Non-Governmental Organization |
| HELPS International | Non-Governmental Organization |
| HELPS International A. C. | Non-Governmental Organization |
| Heta Datain | Independent Consultant |
| Hilful Fuzul Samaj Kallyan Sangstha | Non-Governmental Organization |
| Hugh McLaughlin, PE | Independent Consultant |
| Huys Advies | Independent Consultant |
| Iapoconi Estufas | Independent Consultant |
| iENERGY Inc. | Private Industry |
| Impact Carbon | Carbon Project Developer |
| Independent Consultant | Independent Consultant |
| Independent Consultant, Household Energy and Health | Independent Consultant |
| Indian Institute of Technology | Academia |
| INDIAN INSTITUTE OF TECHNOLOGY DELHI | Government |
| Indian Institute of Technology Delhi | Non-Governmental Organization |
| Indoor Air Pollution and Health Forum Nepal | Non-Governmental Organization |
| Initiative Développement | Non-Governmental Organization |
| INITIATIVE FOR GENDER DEVELOPMENT AND CAPACITY BUILDING | Non-Governmental Organization |
| Innovative Solar Peru | Non-Governmental Organization |
| Institut de Recherche en Sciences Appliquées et Technologies (IRSAT/CNRST) | Academia |
| Institute for Environmental Health and Related Product Safety (IEHS) | Government |
| Instituto de Desenvolvimento Sustentável e Energias Renováveis (IDER) | Non-Governmental Organization |
| Instituto Nacional de Ecología (INE) | Government |
| Instituto Trabajo y Familia | Non-Governmental Organization |
| Integral Advisory Limited | Independent Consultant |
| Integrated Development Association (IDEA) | Non-Governmental Organization |
| Integrated Research and Action for Development (IRADe) | Non-Governmental Organization |
| Integrated Rural Development Initiatives (IRDI) | Non-Governmental Organization |
| Integrated Social Development Effort (ISDE) Bangladesh | Non-Governmental Organization |
| Interface Foundation | Non-Governmental Organization |
| International Center for Energy Environment and Development (ICEED) | Independent Consultant |
| International Energy Initiative (IEI) | Non-Governmental Organization |
| International Institute for Ecological Agriculture | Other Organization Type |
| International Lifeline Fund | Non-Governmental Organization |
| International Relief and Development | Non-Governmental Organization |
| International Renewable Resources Institute | Non-Governmental Organization |
| Inyenyeri | Private Industry |
| Iowa State University- Thermal Systems Virtual Engineering Group | Academia |
| Islan Asset Management | Private Industry |
| Italy (Government) | Government |
| Jatropha Africa | Private Industry |
| Jet City StoveWorks | Non-Governmental Organization |
| Jeunes Volontaires pour l'Environnement | Non-Governmental Organization |
| JID Equipment Engineering | Independent Consultant |
| Jinja Communications | Private Industry |
| Joint Energy and Environment Projects | Non-Governmental Organization |
| Jonathan Rouse, HED Consulting | Other Organization Type |
| Joyline T. M. Tawha | Independent Consultant |
| JSI Research & Training Institute, Inc. | Non-Governmental Organization |
