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NYC Clean Heat has transitioned into the NYC Retrofit Accelerator, New York City's new one-stop resource for energy and water efficiency. Learn more at


Biodiesel fuel is a renewable distillate fuel that is created from agricultural co-products and byproducts, waste cooking oil, and other recycled oils. Using biodiesel fuel for a building's heating system reduces local particulate matter (PM 2.5) emissions as well as greenhouse gas (GHG) emissions as compared to fossil fuels. In addition to the environmental benefits, users of biodiesel are eligible for a tax refund from New York State.

The energy content and physical properties of biodiesel are similar to  ultra-low sulfur No. 2 oil (ULS 2), and therefore biodiesel is often blended with conventional heating oil. Typical blends that are widely available in the market place include 5%, 10% and 20% biodiesel, known as B5, B10, and B20 respectively. Biodiesel can also be used at higher quantities or even as a stand-alone fuel if the system is properly designed.

The conversion process to a biodiesel blend is similar to converting to ULS 2. Consult the converting to ULS 2 section of the website for more information or click here to download a detailed step-by-step guide.

Interested in how biodiesel for heat works in NYC? Check out the biodiesel FAQ. To learn more about biodiesel, click here. To find a biodiesel dealer near you, please visit the dealer locator at

Oil providers, energy service companies, and other organizations offer incentives such as discounted service contracts, group buying discounts, or other offers to encourage buildings to convert from No. 4 heating oils to ULS 2 heating oil with biodiesel. Please click here for more information.