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NYC Mechanical Code

§ 1105.6.3.1 — § 1105.6.3.1

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What is NYC MC § 1105.6.3.1?

Quick Answer

This section mandates that mechanical ventilation systems in machinery rooms must exhaust a specified volume of air during occupied conditions. The requirements include a minimum exhaust rate based on room area or occupancy and a temperature control provision. Applies to building owners managing mechanical ventilation systems.

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

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1105.6.3.1 Quantity-normal ventilation.

MC § 1105.6.3.1

During occupied conditions, the mechanical ventilation system shall exhaust the larger of the following: 1. Not less than 0.5 cfm per square foot (0.0025 m 3 /s × m 2 ) of machinery room area or 20 cfm (0.009 m 3 /s) per person.

2.A volume required to limit the room temperature rise to18°F (-7.8°C) taking into account the ambient heating effect of all machinery in the room but not above a maximum temperature of 122°F (50°C). (Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023) Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.

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