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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


Regulations issued by the New York City Department of Environmental Protection have phased out the use of No. 6 heavy heating oil in New York City and will phase out the use of all heavy heating oil by January 2030.  The regulations were designed to balance near-term pollution reduction while minimizing costs for buildings.

  • All new boiler or burner installations must utilize one of the cleanest fuels, which may include natural gas, ultra-low sulfur 2 oil, biodiesel, or steam.
  • All No. 6 oil Certificate of Operations expired on or before June 30, 2015. At a minimum, all buildings have been required to convert to No.4 oil or a cleaner fuel.
  • All buildings burning No. 4 oil must convert to one of the cleanest fuels upon boiler or burner retirement or by January 1, 2030, whichever is sooner.

To find out when your building will be required to switch to a cleaner fuel, click here.