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In accordance with new regulations designed to phase out the most-polluting grades of heating oil, as of July 2012, the Department of Environmental Protection (DEP) will stop issuing operating certificates for boilers burning #6 oil.
Boilers with Certificates to Operate that renew after July 1, 2012, must be converted to burn #4 or #2 fuel oil or gas. And according to the new rules, by 2030, #4 oil will also be phased out completely and owners must convert to boilers that burn #2 oil or convert to natural gas.