401.6.1 Wind-driven rain.
MC § 401.6.1
All exterior louvers for building ventilation systems shall conform to the requirements of Chapter 16 of the New York City Building Code, where applicable, and the following: 1. Comply with the requirements of AMCA 550. Louvers shall comply with the intrusion requirements of wind-driven rain without the use of a damper. Outdoor air intake openings located in exterior walls shall meet the provisions for exterior wall opening protectives in accordance with Chapter 16 of the New York City Building Code; or 2. Be installed on a plenum configured to intercept any wind-driven rain penetrating the louver and to prevent the rain from entering the building ductwork system. Such plenum shall be waterproofed and equipped with a drainage system to convey water penetrating the louver directly to the outdoors or in accordance with the New York City Plumbing Code.
