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NYC Fuel Gas Code

§ 504.2.1 — § 504.2.1

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What is NYC FGC § 504.2.1?

Quick Answer

This section outlines the requirements for vent obstructions in venting systems. It specifies that venting tables are not applicable where obstructions are present and provides guidelines for determining the maximum and minimum capacity of the vent system based on appliance specifications. Applies to building owners installing vent systems for listed appliances.

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

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504.2.1 Vent obstructions.

FGC § 504.2.1

These venting tables shall not be used where obstructions, as described in Section 503.15, are installed in the venting system. The installation of vents serving listed appliances with vent dampers shall be in accordance with the appliance manufacturer's instructions or in accordance with the following: 1. The maximum capacity of the vent system shall be determined using the "NAT Max" column.

2.The minimum capacity shall be determined as if the appliance were a fan-assisted appliance, using the "FAN Min" column to determine the minimum capacity of the vent system. Where the corresponding "FAN Min" is "NA," the vent configuration shall not be permitted and an alternative venting configuration shall be utilized.

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