A revolving loan fund (RLF) is a financing mechanism that has become a useful tool for financing energy efficiency projects in cities, counties, and states, as well as at institutions like university campuses. This fact sheet describes how city governments can establish revolving loan funds for energy efficiency projects in both municipal and private sector buildings.

This resource is part of the City Energy Project Resource Library. Launched in 2019, the library is the culmination of 6+ years of work on the ground in 20 U.S. cities to reduce energy use in large buildings. The City Energy Project is a joint project of IMT and the Natural Resources Defense Council (NRDC). For more information, visit www.cityenergyproject.org.

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