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NYC Building Code

§ 2113.14 — § 2113.14

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What is NYC BC § 2113.14?

Quick Answer

This section outlines the requirements for multiple flues within the same chimney, specifying that masonry wythes must be constructed between adjacent flue linings, with a minimum thickness of 4 inches. An exception allows two flues to adjoin if venting only one appliance, provided the flue linings are staggered. Applies to building owners managing chimney installations.

General informational summary. Not legal advice for your situation. Consult an attorney before acting on any specific matter.

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2113.14 Multiple flues.

BC § 2113.14

When two or more flues are located in the same chimney, masonry wythes shall be built between adjacent flue linings. The masonry wythes shall be at least 4 inches (102 mm) thick and bonded into the walls of the chimney. Exception: When venting only one appliance, two flues are permitted to adjoin each other in the same chimney with only the flue lining separation between them. The joints of the adjacent flue linings shall be staggered not less than 4 inches (102 mm).

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