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Steps to Conversion


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

Steps to Conversion

Many buildings will be able to switch to one of the cleanest fuels using their existing equipment. Others may need to replace or upgrade components of their systems. Contact the NYC Retrofit Accelerator's team of advisors to answer any questions.

1.   Know when you need to switch

All buildings must convert off heavy heating fuels by 2030, but many buildings will need to convert earlier. To find out when your boiler permit expires click here and enter your building’s address. Planning well in advance of the expiration date will give you the most flexibility and options for your building. Learn more about regulations and the permitting process.

2.   Understand conversion options

Buildings that currently burn No. 4 heating oil have several conversion options to choose from when switching to cleaner fuels. These include Ultra-Low Sulfur 2 oil, biodiesel, natural gassteam, and other alternatives. 

3.   Consider energy efficiency

Most buildings that burn heavy oil and are required to switch to cleaner fuels must also comply with the City's energy efficiency laws, collectively known as the Greener Greater Buildings Plan. The NYC Retrofit Accelerator provides technical assistance to building owners who must comply with Local Laws 84 and 87 of 2009 to help them make a range of energy and water efficiency upgrades to their buildings. Pursuing energy efficiency opportunities at the same time as a fuel conversion will improve heating system performance and help reduce fuel usage and costs.

4.   Obtain costs estimates

Start by contacting your existing fuel supplier or boiler service provider to ask how they can assist you with converting to a cleaner fuel and to obtain cost estimates. If more extensive work to your heating system is needed, you may also need to consult a licensed engineer. If you plan to seek bids from multiple contractors, make sure to submit the most detailed specifications possible and ask contractors to include pricing for all required items.

5.   Contact your utility if necessary

If you are interested in connecting to the natural gas system you will need to contact Con Edison or National Grid, depending on which utility serves your neighborhood, to determine if there will be costs for connecting to their gas distribution system. It is best to obtain cost estimates for your fuel conversion work prior to contacting your gas utility so that you are ready to take action. If you live in Manhattan below 96th street and are interested in converting to steam, contact Con Edison Steam.

6.   Evaluate Incentives and Financing Options

Converting to a cleaner fuel will likely include upfront costs. Learn more about financing and incentives.