New York City · Through Local Law 2026/135 (enacted August 31, 2026)

N.Y.C. Admin. Code § MC 705: Section MC 705: Combined Use of Inside and Outdoor Air (Condition 2)

Where this section sits in the code

New York City Administrative Code
Title 28
Chapter 8: New York City Mechanical Code

705.1 General.

This section shall apply only to appliances located in unconfined spaces in buildings of unusually tight construction. Combustion air supplied by a combined use of indoor and outdoor air shall be supplied through openings and ducts extending to the appliance room or to the vicinity of the appliance.

705.1.1 Openings and supply ducts.

Openings shall be provided, located and sized in accordance with Sections 702.3.1 and 702.3.2; additionally, there shall be one opening to the outdoors having a free area of at least 1 square inch per 5,000 Btu/h (440 mm

/kW) of total input of all appliances in the space.

Collected 2026-09-06T02:48:57Z. Source file · JSON

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