405.2 Manual control.

Each air distribution system shall be provided with not less than one manual control to stop the operation of the supply, return, and exhaust fan(s) in an emergency. The manual control shall be provided at an approved location. A disconnect switch shall not be considered a manual control.

405.2.1 Office buildings.

Any building where the main use or dominant occupancy is classified in occupancy group B having occupied floors located more than 75 feet (22 860 mm) above the lowest level of fire department vehicle access, where a system serves a floor or floors other than the floor on which the equipment is located, shall be provided with the following controls, in addition to the controls required by this chapter:

   1.   Manual controls for operating individually each air supply and each exhaust or return fan in the system located as follows:

      1.1.   At the Fire Command Center, and

      1.2.   In the room containing the affected air-handling fans.

   2.   Manual controls for operating individually or in groups each remote control reversible fire shutter, when such shutters are provided in accordance with the provisions of the New York City Building Code, or each smoke damper provided in accordance with the provisions of the New York City Building Code. Such controls shall be located at the Fire Command Center.

Section MC 406: Ventilation of Uninhabited Spaces

406.1 General.

Uninhabited spaces, such as crawl spaces and attics, shall be provided with natural ventilation openings as required by the New York City Building Code or shall be provided with a mechanical exhaust and supply air system. The mechanical exhaust rate shall be not less than 0.02 cfm per square foot (0.00001 m 3 /s • m 2 ) of horizontal area and shall be automatically controlled to operate when the relative humidity in the space served exceeds 60 percent.

406.1.1 Methane and radon venting.

The design and materials used in the installation of the methane and radon vent systems shall be approved by the commissioner and shall comply with all applicable rules of the Fire Department.