401.5 Intake opening protection.
MC § 401.5
Air intake openings that terminate outdoors shall be protected with corrosion-resistant screens, louvers or grilles. Openings in louvers, grilles and screens shall be sized in accordance with Table 401.5, and shall be protected against local weather conditions. Outdoor air intake openings located in exterior walls shall meet the provisions for exterior wall opening protectives in accordance with Section 705 of the New York City Building Code. Table 401.5Opening Sizes in Louvers, Grilles and Screens Protecting Outdoor Exhaust and Air Intake Openings Outdoor Opening Type Minimum and Maximum Opening Sizes in Louvers, Grilles and Screens Measured in Any DirectionIntake openings in residential occupanciesNot < 1/4 inch and not > 1/2 inchIntake openings in other than residential occupancies> 1/4 inch and not > 1 inch For SI: 1 inch = 25.4 mm. Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2014/051.
