N.Y.C. Admin. Code § FGC 502: Section FGC 502: Vents

502.1 General.

Vents, except as provided in Section 503.7, shall be listed and labeled. Type B and BW vents shall be tested in accordance with UL 441 and labeled or field fabricated in accordance with NFPA 211. Type L vents shall be tested in accordance with UL 641. Vents for Category II, III and IV appliances shall be tested in accordance with UL 1738. Plastic piping shall be listed and installed in accordance with the terms of its listing and the appliance manufacturers' instructions.

502.2 Connectors required.

Connectors shall be used to connect appliances to the vertical chimney or vent, except where the chimney or vent is attached directly to the appliance. Vent connector size, material, construction and installation shall be in accordance with Section 503.

502.3 Vent application.

The application of vents shall be in accordance with Table 503.4.

502.4 Insulation shield.

Where vents pass through insulated assemblies, an insulation shield constructed of steel having a minimum thickness of 0.0187 inch (0.4712 mm) (No. 26 gage) shall be installed to provide clearance between the vent and the insulation material. The clearance shall be not less than the clearance to combustibles specified by the vent manufacturer's instructions. Where vents pass through attic space, the shield shall terminate not less than 2 inches (50.8 mm) above the insulation materials and shall be secured in place to prevent displacement. Insulation shields provided as part of a listed vent system shall be installed in accordance with the manufacturer's instructions.

502.5 Installation.

Vent systems shall be sized, installed and terminated in accordance with the vent and appliance manufacturer's instructions and Section 503.

502.6 Support of vents.

All portions of vents shall be adequately supported for the design and weight of the materials employed.

502.7 Protection against physical damage.

In concealed locations, where a vent is installed through holes or notches in studs, joists, rafters or similar members less than 1 1/2 inches (38.1 mm) from the nearest edge of the member, the vent shall be protected by shield plates. Protective steel shield plates having a minimum thickness of 0.0575 inch (1.461 mm) (No. 16 gage) shall cover the area of the vent where the member is notched or bored and shall extend not less than 4 inches (101.6 mm) above sole plates, below top plates and to each side of a stud, joist or rafter.

502.7.1 Door swing.

Appliance and equipment vent terminals shall be located such that doors cannot swing within 12 inches (304.8 mm) horizontally of the vent terminal. Door stops or closers shall not be installed to obtain this clearance. Means of protecting the clearance that are not easily overridden or removed may be used to obtain this clearance.