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What is NYC FGC § 504.3.17?

Quick Answer

This section establishes that when multiple appliances are connected to a vertical vent or chimney, the flow area of the largest section must not exceed seven times the smallest vent areas of the listed appliances unless approved engineering methods are used. Applies to building owners with multiple connected appliances.

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

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504.3.17 Vertical vent maximum size.

FGC § 504.3.17

Where two or more appliances are connected to a vertical vent or chimney, the flow area of the largest section of vertical vent or chimney shall not exceed seven times the smallest listed appliance categorized vent areas, flue collar area or draft hood outlet area unless designed in accordance with approved engineering methods.

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