803.10.4.2 Field-applied insulation for chimney connectors.

Chimney connectors of appliances with flue gas temperatures less than 500°F (260°C) that pass through walls or partitions of combustible construction shall be insulated with a field-applied flexible wrap assembly tested in accordance with either ASTM E 2816 or ASTM E 2336. The connector shall comply with all of the following:

   1.   The insulated vent connectors pass-through assemblies and through penetration assemblies shall be tested for F and T ratings in accordance with ASTM E 814. The F and T rating of the assembly shall be equal to or exceed the fire-resistance rating of the mechanical/boiler room.

   2.   Bracing and supports shall be of noncombustible material securely attached to the structure and designed to carry gravity and seismic loads within the stress limitations of Chapter 16 of the New York City Building Code. Bolts, screws, rivets and other mechanical fasteners shall not penetrate connector walls.

   3.   Insulated vent connector pass-through assemblies shall not pass through ceilings or floors.

   4.   Insulated vent connector pass-through assemblies shall not run through occupied spaces, corridors, sleeping rooms and spaces with hazardous materials.

   5.   Insulated vent connector pass-through assemblies material shall meet the requirements for minimum chimney connector thicknesses for medium and high-heat appliances in accordance with Table 803.9(2).

   6.   Insulated vent connector pass-through assemblies fittings shall be welded or shall be factory fabricated UL listed construction suitable for external flexible wrap insulation.

   7.   The draft calculations shall account for the insulating value of the field-applied flexible wrap insulation.

803.10.5 Pitch.

Connectors shall rise vertically to the chimney or vent with a minimum pitch equal to one-fourth unit vertical in 12 units horizontal (2-percent slope).

803.10.6 Clearances.

Connectors shall have a minimum clearance to combustibles in accordance with Table 803.10.6. The clearances specified in Table 803.10.6 apply, except where the listing and labeling of an appliance specifies a different clearance, in which case the labeled clearance shall apply. The clearance to combustibles for connectors shall be reduced only in accordance with Section 308 or via the use of a listed chimney or vent connector system.

Table 803.10.6
Connector Clearances to Combustibles

Type of Appliance	Minimum Clearance (inches)
Domestic-type appliances
Chimney and vent connectors
Electric and oil incinerators	18
Oil and solid fuel-burning appliances	18
Oil appliances labeled for venting with Type L vents	9
Commercial, industrial-type appliances
Low-heat appliances
Chimney connectors
Oil and solid fuel boilers, furnaces and water heaters	18
Oil unit heaters	18
Other low-heat industrial appliances	18
Medium-heat appliances
Chimney connectors
All oil and solid fuel-burning appliances	36
High-heat appliances
Masonry or metal connectors
All oil and solid fuel-burning appliances	In accordance with NFPA 211

 

For SI: 1 inch = 25.4 mm.

Section MC 804: Direct-Vent, Integral Vent and Mechanical Draft Systems

804.1 Direct-vent terminations.

Vent terminals for direct-vent appliances shall be installed in accordance with the manufacturer's instructions. In addition, direct vent terminations shall comply with the following requirements:

   1.   Where located adjacent to walkways, the termination shall be not less than 7 feet (2133.6 mm) above the level of the walkway.

   2.   Vents shall terminate at least 3 feet (914.4 mm) above any forced air inlet, other than the forced air inlet for the subject direct vent appliance, located within 10 feet (3048 mm).

   3.   The vent system shall terminate at least 4 feet (1219.2 mm) below, 4 feet (1219.2 mm) horizontally from or 1 foot (304.8 mm) above any door, window or gravity air inlet into the building.

   4.   The vent termination point shall not be located closer than 3 feet (914.4 mm) to an interior corner formed by two walls perpendicular to each other.

   5.   The vent termination shall not be mounted directly above or within 3 feet (914.4 mm) horizontally from any gas or electric metering, regulating, venting relief equipment or other building opening.

   6.   The bottom of the vent termination shall be located at least 36 inches (914.4 mm) above finished grade.

   7.   The maximum heat input of an appliance served by single horizontal vent termination shall be 350,000 Btu/h (102.6 kW), unless otherwise approved by the commissioner.

   8.   The maximum heat input of all appliances served by horizontal vent terminations located within a 10 foot (3048 mm) radius shall be 350,000 Btu/h (102.6 kW), unless otherwise approved by the commissioner.

   9.   The vent termination shall be located a minimum of 4 feet (1219.2 mm) from the lot line or from adjacent buildings. The termination shall be installed in accordance with the vent manufacturer's instructions.

Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2014/051.

804.2 Appliances with integral vents.

Appliances incorporating integral venting means shall be installed in accordance with their listings and the manufacturer's instructions. In addition, integral vent terminals shall comply with the following requirements:

   1.   Where located adjacent to walkways, the vent terminal shall be not less than 7 feet (2133.6 mm) above the level of the walkway.

   2.   The vent terminal shall be at least 3 feet (914.4 mm) above any forced air inlet, other than the forced air inlet for the subject integral vent appliance, located within 10 feet (3048 mm).

   3.   The vent terminal shall be at least 4 feet (1219.2 mm) below, 4 feet (1219.2 mm) horizontally from or 1 foot (304.8 mm) above any door, window or gravity air inlet into the building.

   4.   The vent terminal shall not be located closer than 3 feet (914.4 mm) to an interior corner formed by two walls perpendicular to each other.

   5.   The vent terminal shall not be mounted directly above or within 3 feet (914.4 mm) horizontally from any gas or electric metering, regulating, venting relief equipment or other building opening.

   6.   The bottom of the vent terminal shall be located at least 36 inches (914.4 mm) above finished grade.

   7.   The maximum heat input of an appliance served by single horizontal vent terminal shall be 350,000 Btu/h (102.6 kW), unless otherwise approved by the commissioner.

   8.   The maximum heat input of all appliances served by horizontal vent terminals located within a 10 foot (3048 mm) radius shall be 350,000 Btu/h (102.6 kW), unless otherwise approved by the commissioner.

   9.   The vent terminal shall be located a minimum of 4 feet (1219.2 mm) from the lot line or from adjacent buildings. The termination shall be installed in accordance with the vent manufacturer's instructions.

Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2014/051.

804.2.1 Reserved.