The Energy Conservation Fund (ECF) is a financial mechanism established to support energy efficiency and conservation projects in the United States. The ECF was created in 1992 under the Energy Policy Act and is managed by the U.S. Department of Energy (DOE). The ECF provides funding for projects that improve energy efficiency and reduce energy consumption in buildings, industry, transportation, and other sectors. The fund supports a wide range of activities, including energy audits, retrofits, and upgrades, as well as research and development of new technologies and practices. The ECF is designed to promote public-private partnerships and leverages private sector investments in energy efficiency. The fund provides low-interest loans, loan guarantees, and grants to eligible entities, including state and local governments, businesses, and non-profit organizations. The ECF also supports the development of innovative financing models, such as energy service agreements and performance contracting, to help overcome barriers to investment in energy efficiency.