Section 27-879
§ 27-879 General. (a) Vent systems of gas-fired equipment shall be so
designed and constructed as to completely exhaust the products of
combustion to the outdoor air.
(b) When required by the commissioner, gas vents shall be tested to
determine fire safety and the adequate exhausting of the products of
combustion.
(c) Vents shall be installed if required, in accordance with the
applicable standards for gas-fired equipment. See reference standard RS
15-2 for a tabulation of these standards.
Section 27-880
§ 27-880 Equipment not required to be vented. (a) Ranges for which a
vent is not required by reference standard RS 15-2.
(b) Built-in domestic cooking units for which a vent is not required
by reference standard RS 15-2.
(c) Hot plates and laundry stoves.
(d) Type 1 clothes dryers.
(*e) Water heaters with inputs not over five thousand Btu/hr. (See
note below.)
(*f) Automatically controlled instantaneous water heaters that supply
water to a single faucet which is attached to and made a part of the
equipment.
(*g) A single booster type (automatic instantaneous) water heater when
designed and used solely for the sanitizing rinse requirements of a
national sanitation foundation class one, two or three dishwashing
machine, provided that the input is limited to fifty thousand Btu/hr.
the storage capacity is limited to twelve and one-half gallons and the
heater is installed in a commercial kitchen having a mechanical exhaust
system.
(*h) Refrigerators.
(*i) Counter equipment.
(*j) Room heaters for which a vent is not required by reference
standard RS 15.0.
(*k) Other equipment for which a vent is not required and which are
not provided with flue collars.
(*l) Specialized equipment of limited input such as laboratory burners
or gas lights.
Note: When any, or all, of the equipment marked with an asterisk (*)
is installed so that the aggregate input rating exceeds thirty Btu/hr.
per cubic foot of room or space in which it is installed, one or more
pieces of the equipment shall be provided with a venting system or other
equivalent means for removing the vent gases to the outdoor air so that
the aggregate input rating of the remaining unvented equipment does not
exceed the thirty Btu/hr. per cubic foot figure. When the room or space
in which such equipment is installed is directly connected to another
room or space by a doorway, archway, or other opening of comparable
size, which cannot be closed, the volume of such adjacent room or space
may be included in the calculations.
Section 27-881
§ 27-881 Draft hoods. (a) All vented equipment, except dual oven type
combination ranges, equipment with sealed combustion chambers, and units
designed for power burners or forced venting, shall be installed with a
draft hood or with a barometric damper.
(b) The draft hood supplied with, or forming a part of, vented
equipment shall be installed in accordance with the requirements of the
applicable standard in reference standard 15-2. The draft hood shall be
located in the same room as the combustion air opening of the equipment.
Section 27-882
§ 27-882 Chimneys for venting gas-fired equipment. When venting of
gas-fired equipment is provided for by the use of chimneys, such
chimneys shall be constructed in accordance with the requirements of
this subchapter.
Section 27-883
§ 27-883 Gas equipment connected to chimneys. Automatically controlled
gas-fired equipment connected to a chimney that also serves equipment
for the combustion of solid or liquid fuel shall be equipped with an
automatic pilot. A gas-fired equipment vent connector and a chimney
connector from equipment burning another fuel, located on the same
floor, may be connected into the same chimney through separate openings,
or may be connected through a single opening if joined by a suitable
fitting located as close as practicable to the chimney. If two or more
openings are provided into one chimney, they shall be at different
levels.
Section 27-884
§ 27-884 Types of gas vents. (a) Type B gas vents. Type B gas vents
conforming to the requirements of section 27-855 of article one of this
subchapter may be used to vent gas-fired equipment. Type B gas vents may
be used for single-story or multi-story installations when they conform
to the requirements of section 27-855 of article one of this subchapter
and the gas equipment used in multi-story installations shall be
accepted for such use. Type B gas vents shall be used to vent only
listed gas appliances with draft hoods and other gas appliances listed
for use with Type B gas vents. However, Type B gas vents shall not be
used for venting:
(1) vented wall furnaces listed for use with Type BW gas vents only;
(2) incinerators;
(3) appliances which may be converted readily to the use of solid or
liquid fuels;
(4) combination gas-oil burning appliances;
(5) appliances listed for use with chimneys only.
(b) Type B-W gas vents. Type B-W gas vents conforming to the
requirements of section 27-855 of article one of this subchapter shall
be used to vent gas-fired vented recessed heaters. Type B-W gas vents
may be used with single-story or multi-story installations when they
conform to the requirements of section 27-855 of article one of this
subchapter and the gas equipment used in multi-story installations shall
be accepted for such use. Type BW vents shall be used with listed vented
gas wall furnaces having a capacity not greater than that of the listed
Type BW gas vent.
(c) Single-wall metal vents. Single-wall metal vents may be used to
vent gas-fired equipment and shall be constructed of not less than 16
oz. sheet copper, or No. 20 galvanized sheet gauge steel, or of other
equivalent noncombustible corrosion-resistive material. Single-wall
metal gas vents may pass through the roof or exterior wall to the
outdoor air, but shall not pass through any attic or other concealed
space nor through any intermediate floor construction.
(d) Connection to a common vent. Connection of gas-fired equipment on
more than one floor level to a common vent, except as provided for in
subdivisions (a) and (b) of this section, shall be prohibited.
(e) Ventilating hoods. Ventilating hoods and exhaust systems may be
used to vent kitchen, laboratory, and commerical equipment.
Section 27-885
§ 27-885 Labeling gas vents. Gas vents for use with gas-fired
equipment, and which are not designed for use with solid or liquid
fuel-fired equipment, shall be plainly and permanently identified by a
metal label etched or embossed to read: "This gas vent is for equipment
which burns gas only. Do not connect to incinerator or solid or liquid
fuel-burning equipment." This label shall be attached to the vent at a
point near where the gas vent system enters the wall, ceiling, or
chimney.
Section 27-886
§ 27-886 Special venting arrangements. (a) Equipment with sealed
combustion chambers. The vent requirements contained in this subchapter
do not apply to equipment having sealed combustion chambers and which
are so constructed and installed that all air for combustion is derived
from outside the space being heated and all flue gases are discharged by
integral vent to the outdoors. Such equipment, having integral venting,
shall be installed in accordance with the conditions of the applicable
standard governing their use.
(b) Gas-vent exhausters and chimney exhausters. Gas-vent exhausters
and chimney exhausters may be used with gas appliances in lieu of
natural draft vents. Where an exhauster is used with gas-burning
equipment requiring venting, provisions shall be made to prevent the
flow of gas to the main burner in the event of failure of the exhaust
system. A vent connector serving gas equipment vented by natural draft
shall not be connected into the discharge side of a power exhauster.
(c) Ventilating hoods and exhaust systems. Ventilating hoods and
exhaust systems may be used to vent gas equipment installed in
commercial applications. When automatically operated equipment, such as
water heaters, are vented through natural-draft ventilating hoods,
dampers shall not be installed in the ventilating system. When the
ventilating hood or exhaust system is equipped with a power-driven
exhaust fan, the equipment control system shall be so interlocked as to
permit equipment operation only when the power exhaust is in operation.
When used, ventilating hoods shall be built and installed in accordance
with the provisions of subchapter thirteen of this chapter.
Section 27-887
§ 27-887 Installation requirements. (a) The gas vent connected to
equipment with a single vent shall not be less than the size of the
draft hood outlet, and in no case less than two inches in diameter.
(b) When more than one piece of equipment is connected to a gas vent,
the area shall be not less than the area of the largest vent connector
plus fifty percent of the areas of additional vent connectors or in
accordance with the provisions of reference standard RS 15-1.
(c) Where two or more vent connectors enter a common vertical gas vent
or chimney, the smaller connector shall enter at the highest level
consistent with available headroom or clearance to combustible material.
Two or more items of gas equipment may be vented through a common vent
connector or manifold located at the highest level consistent with
available headroom or clearance to combustible material. The manifold,
all junction fittings, and the common vent connector shall be of a size
adequate for the combined volume of the vent gases.
(d) Gas vents shall be enclosed as provided in subdivision (c) of
section 27-861 of article two of this subchapter.
Section 27-888
§ 27-888 Gas vent height and locations. Gas vents shall extend at
least two feet above the highest construction, such as a roof ridge,
parapet wall, or penthouse, within ten feet of the vent outlet whether
the construction is on the same building as the chimney or on another
building. However, such constructions do not include chimneys or other
vents, or open structural framing. The vent shall be as high as such
construction which is located beyond ten feet from the vent and up to
and including the distance determined by the following formula:
D = 2(sq.rt.)A
where: D = Distance in ft., measured from the center of the vent outlet
to the nearest edge of the construction.
A = Free area, in sq. in., of vent flue space.
Vents shall be subject to the following additional requirements:
(a) No gas vent shall terminate less than five feet in vertical height
above the highest connected equipment draft hood outlet or flue collar.
(b) No type B-W gas vent serving a vented recessed heater shall
terminate less than twelve feet in vertical height above the bottom of
the heater.
(c) All gas vents shall terminate in an approved vent or cowl, which
shall prevent down drafts and prevent rain and debris from entering the
vent.
Section 27-889
§ 27-889 Adjoining gas vents. (a) Responsibility of owner of taller
building. Whenever a building is erected, enlarged, or increased in
height so that any portion of such building, except chimneys or vents,
extends above the top of a previously constructed gas vent within fifty
feet, the owner of the new or altered building shall have the
responsibility of altering such gas vents that have their outlets within
fifty feet measured horizontally, of any part of the newly erected
building. Such alterations shall be at the expense of the owner of the
new or altered building and shall be accomplished by one of the
following means or a combination thereof:
(1) Carry up such previously constructed vents from gas-fired
equipment to the height required in section 27-888 of this article.
(2) Offset such gas vents to a distance of more than fifty feet from
the new or altered building, provided that the new location of the
outlet of the offset gas vent shall comply with the requirements of this
subchapter.
(b) Protection of draft. After the alteration of a gas vent as
described in subdivision (a) of this section, it shall be the
responsibility of the owner of the new or altered building to provide
any mechanical devices or equipment necessary to maintain the proper
draft in the equipment.
(c) Written notification. The owner of the new or altered building
shall notify the owner of the building affected in writing at least
forty-five days before starting the work and request written consent to
do such work. Such notice shall be accompanied by a written description
or a plan showing how the proposed alterations are to be made.
(d) Approval. The method of correction shall be subject to the
approval of the commissioner.
(e) Refusal of consent. If consent is not granted by the owner of the
previously constructed or altered building to do the alteration work
required by paragraph one of subdivision (a) of this section, such owner
shall signify his or her refusal in writing to the owner of the new or
altered building and to the commissioner, and the owner of the new or
altered building has submitted plans that conform to the requirements of
this section, he or she shall thereupon be released from any
responsibility for the operation of his or her equipment and for any
health hazard or nuisance that may occur as a result of the newly
erected or modified building. Such responsibilities shall then be
assumed by the owner of the previously constructed building. Likewise,
should such owner neglect to grant consent within forty-five days from
the date of written request or fail to signify his or her refusal, he or
she shall then assume all responsibilities as prescribed above.
(f) Procedures. It shall be the obligation of the owner of the new or
altered building to:
(1) Schedule this work so as to create a minimum of disturbance to the
occupants of the affected building.
(2) Provide such essential services as are normally supplied by the
equipment while it is out of service.
(3) Where necessary, support such extended gas vents from his or her
building or carry up such vents within his or her building.
(4) Provide for the maintenance, repair, and/or replacement of such
alterations.
(5) Make such alterations of the same material as the original gas
vent except where the owner of the vent affected shall give his or her
consent to do otherwise. All work shall be done in such fashion as to
maintain the architectural esthetics of the existing building.
(g) Existing violations. Any existing violations on the previously
constructed equipment shall be corrected by the owner of the equipment
before any equipment is added or alterations made at the expense of the
owner of the new or altered building.
(h) The commissioner may grant a variance in accordance with the
provisions of section 27-107 of article one of subchapter one of this
chapter.
Section 27-890
§ 27-890 Support of gas vents. All portions of gas vents shall be
adequately supported for the weight of the material used and for the
applied loads on the vent.
Section 27-891
§ 27-891 Prohibited termination. Gas vents extending through outside
walls shall not terminate below eaves or parapets.
To the extent possible under law, Friends of Devin Balkind for Public Advocate has waived all copyright and related or neighboring rights to New York City Administrative Code. This work is published from: United States.
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