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NYC Mechanical Code

§ 1104.4.2 — § 1104.4.2

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What is NYC MC § 1104.4.2?

Quick Answer

This section establishes guidelines for determining the maximum allowable quantity of refrigerant in an air duct system based on the volume of the smallest enclosed occupied space served by the system. An exception is noted for airflow conditions affecting the entire space. Applies to building owners managing HVAC systems.

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

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1104.4.2 Communicating spaces.

MC § 1104.4.2

Where an evaporator or condenser is located in an air duct system, the volume of the smallest, enclosed occupied space served by the duct system shall be used to determine the maximum allowable quantity of refrigerant in the system. Exception: If airflow to any enclosed space cannot be reduced below one-quarter of its maximum, the entire space served by the air duct system shall be used to determine the maximum allowable quantity of refrigerant in the system.

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