CALIFORNIA MECHANICAL CODE - MATRIX ADOPTION TABLE CHAPTER 9 - INSTALLATION OF SPECIFIC APPLIANCES (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
Adopting Agency
BSC
BSC-CG
SFM
HCD
DSA
OSHPD
BSCC
DPH
AGR
DWR
CEC
CA
SL
SLC
1
2
1-AC
AC
SS
SS/CC
1
1R
2
3
4
5
Adopt Entire Chapter
X
X
X
X
X
Adopt Entire Chapter as amended (amended sections listed below)
This state agency does not adopt sections identified with the following symbol: †The Office of the State Fire Marshal's adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.
This chapter addresses requirements for
the design, construction, and installation of specific appliances.
In addition to the requirements of this chapter, appliances shall
comply with the general requirements of Chapter 3.
This chapter is applicable primarily to nonindustrial-type appliances and installations and, unless specifically indicated, does not apply to industrial-type appliances and installations. Listedappliances shall be installed in accordance with their listing and the manufacturer's installation instructions or, as elsewhere specified in this chapter, as applicable to the appliance. Unlisted appliances shall be installed as specified in this part as applicable to the appliances.
Appliances shall not be installed so their combustion, ventilation,
and dilution air are obtained only from a bedroom or
bathroom unless the bedroom or bathroom has the required
volume in accordance with Section 701.4. [NFPA 54:10.1.2]
[OSHPD 1, 1R, 2, 4 & 5]Warm air furnaces shall not be
installed under openable windows on exterior walls.
When additional
or replacement appliances or equipment is installed or
an appliance is converted to gas from another fuel, the location in which the appliances or equipment is to be operated
shall be checked to verify the following:
Air for combustion and ventilation is provided where
required, in accordance with the provisions of Section
701.0. Where existing facilities are not adequate, they shall be upgraded to meet Section 701.0 specifications.
The installation components and appliances meet the
clearances to combustible material provisions of Section
303.10. It shall be determined that the installation and
operation of the additional or replacement appliances do
not render the remaining appliances unsafe for continued
operation.
The appliance shall be connected to the fuel gas for which it was designed. No attempt shall be made to convert the appliance from the gas specified on the rating plate for use with a different gas without consulting the installation instructions, the serving gas supplier, or the appliance manufacturer for complete instructions. [NFPA 54:9.1.3]
Unlisted appliances for use with
undiluted LP-Gases and installed indoors, except attended laboratory equipment, shall be equipped with safety shutoff
devices of the complete shutoff type. [NFPA 54:9.1.4]
Where
air or oxygen under pressure is used in connection with the
gas supply, effective means such as a back pressure regulator
and relief valve shall be provided to prevent air or oxygen
from passing back into the gas piping. Where oxygen is used,
installation shall be in accordance with NFPA 51. [NFPA
54:9.1.5]
Appliances and equipment shall be furnished either with load-distributing
bases or with a sufficient number of supports to prevent damage to either the building structure or the appliance and the equipment. [NFPA 54:9.1.8.1]
At the locations selected for installation of appliances and equipment, the dynamic
and static load-carrying capacities of the building structure
shall be checked to determine whether they are adequate to carry the additional loads. The appliances and
equipment shall be supported and shall be connected to
the piping so as not to exert undue stress on the connections.
[NFPA 54:9.1.8.2]
Appliances shall not be installed in areas where the open use, handling, or dispensing
of flammable liquids occurs, unless the design, operation, or
installation reduces the potential of ignition of the flammable
vapors. Appliances installed in compliance with Section
305.1 through Section 305.1.2, Section 303.11, or Section
303.12 shall be considered to comply with the intent of this
provision. [NFPA 54:9.1.9]
Unless otherwise specified, solid-fuel burning appliances shall be installed
in accordance with NFPA 211 and the manufacturer's installation
instructions.
Any combination of appliances, equipment, attachments, or devices used together in any manner shall comply with the standards that apply to the individual appliance and equipment. [NFPA 54:9.1.21]
Non-direct-vent appliances installed in beauty shops, barber shops, or other facilities where chemicals that generate corrosive or flammable products such as aerosol sprays are routinely used shall be located in a mechanical room separate or partitioned off from other areas with provisions for combustion and dilution air from outdoors. Direct vent appliances in such facilities shall be in accordance with the appliance manufacturer's installation instructions. [NFPA 54:9.1.6.2]
In addition to air needed for combustion
in commercial or industrial processes, process air shall be
provided as required for cooling of appliances, equipment, or
material; for controlling dew point, heating, drying, oxidation,
dilution, safety exhaust, odor control, and air for compressors;
and for comfort and proper working conditions for
personnel. [NFPA 54:9.1.7]
Where the
gas supply pressure is higher than that at which the appliance
is designed to operate or varies beyond the design pressure
limits of the appliance, a gas appliance pressure regulator
shall be installed. [NFPA 54:9.1.18]
Venting of gas appliance pressure regulators shall comply with the following requirements:
Appliance pressure regulators requiring access to the atmosphere for successful operation shall be equipped with vent piping leading outdoors or, if the regulator vent is an integral part of the appliance, into the combustion chamber adjacent to a continuous pilot, unless constructed or equipped with a vent limiting means to limit the escape of gas from the vent opening in the event of diaphragm failure.
Vent limiting means shall be employed on listedappliance pressure regulators only.
In the case of vents leading outdoors, means shall be employed to prevent water from entering this piping and also to prevent blockage of vents by insects and foreign matter.
Under no circumstances shall a regulator be vented to the appliance flue or exhaust system.
In the case of vents entering the combustion chamber, the vent shall be located so the escaping gas is readily ignited by the pilot and the heat liberated thereby does not adversely affect the normal operation of the safety shutoff system. The terminus of the vent shall be securely held in a fixed position relative to the pilot. For manufactured gas, the need for a flame arrester in the vent piping shall be determined.
A vent line(s) from an appliance pressure regulator and a bleed line(s) from a diaphragm-type valve shall not be connected to a common manifold terminating in a combustion chamber. Vent lines shall not terminate in positive-pressure-type combustion chambers. [NFPA 54:9.1.19]
Bleed lines shall comply with the following requirements:
Diaphragm-type valves shall be equipped to convey
bleed gas to the outdoors or into the combustion chamber
adjacent to a continuous pilot.
In the case of bleed lines leading outdoors, means shall
be employed to prevent water from entering this piping
and also to prevent blockage of vents by insects and foreign
matter.
Bleed lines shall not terminate in the appliance flue or
exhaust system.
In the case of bleed lines entering the combustion chamber,
the bleed line shall be located so the bleed gas is readily ignited by the pilot and the heat liberated thereby
does not adversely affect the normal operation of the safety shutoff system. The terminus of the bleed line shall
be securely held in a fixed position relative to the pilot.
For manufactured gas, the need for a flame arrester in the
bleed line piping shall be determined.
A bleed line(s) from a diaphragm-type valve and a vent line(s) from an appliance pressure regulator shall not
be connected to a common manifold terminating in a
combustion chamber. Bleed lines shall not terminate in
positive-pressure-type combustion chambers. [NFPA
54:9.1.20]
The installation of air-conditioning appliances shall comply with the following requirements:
Listed air-conditioning appliances shall be installed with clearances in accordance with the terms of their listing and the manufacturer's installation instructions.
Unlisted air-conditioning appliances shall be installed with clearances from combustible material of not less than 18 inches (457 mm) above the appliance and at the sides, front, and rear and in accordance with the manufacturer's installation instructions. [NFPA 54:10.2.3(2)]
Listed and unlisted air-conditioning appliances shall be permitted to be installed with reduced clearances to combustible material, provided that the combustible material or appliance is protected as described in Table 303.10.1 and such reduction is allowed by the manufacturer's installation instructions. [NFPA 54:10.2.3(3)]
Where the furnace plenum is adjacent to plaster on metal lath or noncombustible material attached to combustible material, the clearance shall be measured to the surface of the plaster or other noncombustible finish where the clearance specified is 2 inches (51 mm) or less. [NFPA 54:10.2.3(4)]
Listed air-conditioning appliances shall have the clearance from supply ducts within 3 feet (914 mm) of the furnace plenum be not less than that specified from the furnace plenum. No clearance is necessary beyond this distance. [NFPA 54:10.2.3(5)]
Air-conditioning
appliances shall be installed in accordance with the manufacturer's
installation instructions. Unless the appliance is
listed for installation on a combustible surface, such as a
floor or roof, or unless the surface is protected in an
approved manner, it shall be installed on a surface of noncombustible
construction with noncombustible material
and surface finish and with no combustible material
against the underside thereof. [NFPA 54:10.2.4]
Means for interrupting the electrical supply to the air-conditioning appliance and to its associated cooling tower (if supplied and installed in a location remote from the air conditioner) shall be provided within sight of and not over 50 feet (15 240 mm) from the air conditioner and the cooling tower. [NFPA 54:10.2.7]
Central heating furnace and low-pressure boiler installations in bedrooms or bathrooms shall comply with one of the following:
Central heating furnaces and low-pressure boilers shall be permitted to be installed in a closet located in the bedroom or bathroom, provided the closet is equipped with a listed, gasketed door assembly, and a listed self-closing device. The self-closing door assembly shall comply with the requirements of Section 904.1.1. The door assembly shall be installed with a threshold and bottom door seal and shall comply with the requirements of Section 904.1.2. Combustion air for such installations shall be obtained from the outdoors. The closet shall be for the exclusive use of the central heating furnace or low-pressure boiler.
Central heating furnaces and low-pressure boilers shall be of the direct vent type.
Self-closing doors shall
swing easily and freely, and shall be equipped with a self-closing
device to cause the door to close and latch each
time it is opened. The closing mechanism shall not have
a hold-open feature.
Gasketing on gasketed doors or
frames shall be furnished in accordance with the published
listings of the door, frame, or gasketing material
manufacturer.
Exception: Where acceptable to the Authority Having
Jurisdiction, gasketing of noncombustible or limited-combustible
material shall be permitted to be applied to
the frame, provided closing and latching of the door are
not inhibited.
Listed central heating furnaces and low-pressure boilers shall be installed with clearances
in accordance with the terms of their listings and
the manufacturer's installation instructions.
Unlisted central heating furnaces and low-pressure boilers shall be installed with clearances from combustible material not less than those specified in Table 904.2.2. [NFPA 54:10.3.2.2]
1. Automatically fired, forced air or gravity system, equipped with temperature limit control that cannot be set higher than 250°F.
6
—
6
18
6
18
2. Automatically fired heating boilers — steam boilers operating at not over 15 pounds-force per square inch (psi) and hot water boilers operating at 250°F or less.
6
6
6
18
18
18
3. Central heating boilers and furnaces, other than in 1 or 2.
18
18
18
18
18
18
For SI units: 1 inch = 25.4 mm, °C = (°F-32)/1.8, 1 pound-force per square inch = 6.8947 kPa * See Section 904.1 for additional requirements for central heating boilers and furnaces.
Listed and unlisted central heating furnaces and low-pressure boilers
shall be permitted to be installed with reduced clearances
to combustible material, provided that the combustible material or appliance is protected as described in Table
303.10.1 and Figure 303.10.1(1) through Figure
303.10.1(3), and such reduction is allowed by the manufacturer's
installation instructions. [NFPA 54:10.3.2.3]
Where the furnace plenum is adjacent to
plaster on metal lath or noncombustible material attached
to combustible material, the clearance shall be measured
to the surface of the plaster or other noncombustible finish
where the clearance specified is 2 inches (51 mm) or
less. [NFPA 54:10.3.2.5]
The clearances to these appliances shall not interfere with combustion air, draft hood
clearance and relief, and accessibility for servicing.
[NFPA 54:10.3.2.6]
Central heating furnaces other than those listed in Section 603.13.2 or Section 603.13.3 shall have clearances from the supply ducts of not less than 18 inches (457 mm) from the furnace plenum for the first 3 feet (914 mm), then 6 inches (152 mm) for the next 3 feet (914 mm) and 1 inch (25.4 mm) beyond 6 feet (1829 mm). [NFPA 54:10.3.2.9]
A central heating boiler or furnace shall be installed in accordance with the manufacturer's instructions in one of the following manners:
On a floor of noncombustible construction with noncombustible flooring and surface finish and with no combustible material against the underside thereof.
On fire-resistive slabs or arches having no combustible material against the underside thereof.
Steam and hot water boilers, respectively, shall be provided
with approvedautomatic limiting devices for shutting down
the burner(s) to prevent boiler steam pressure or boiler water
temperature from exceeding the maximum allowable working
pressure or temperature. Safety limit controls shall not be
used as operating controls. [NFPA 54:10.3.4]
All water boilers and steam boilers shall be provided with an automatic means to shut off the
fuel supply to the burner(s) if the boiler water level drops below the lowest safe water line. In lieu of the low-water cutoff,
water tube or coil-type boilers that require forced circulation
to prevent overheating and failure shall have an
approved flow sensing device arranged to shut down the
boiler when the flow rate is inadequate to protect the boiler against overheating. [NFPA 54:10.3.5]
Steam and hot water boilers shall be equipped, respectively, with listed or approved steam safety or pressure relief valves of appropriate discharge capacity and conforming with ASME requirements. A shutoff valve shall not be placed between the relief valve and the boiler or on discharge pipes between such valves and the atmosphere. [NFPA 54:10.3.6]
The installation of refrigeration coils shall comply with the following requirements:
A refrigeration coil shall not be installed in conjunction with a forced air furnace where circulation of cooled air is provided by the furnace blower, unless the blower has sufficient capacity to overcome the external static pressure resistance imposed by the duct system and refrigeration coil at the air flow rate for heating or cooling, whichever is greater.
Furnaces shall not be located upstream from refrigeration coils, unless the refrigeration coil is designed or equipped so as not to develop excessive temperature or pressure.
Refrigeration coils shall be installed in parallel with or on the downstream side of central furnaces to avoid condensation in the heating element, unless the furnace has been specifically listed for downstream installation. With a parallel flow arrangement, the dampers or other means used to control flow of air shall be sufficiently tight to prevent any circulation of cooled air through the furnace.
Means shall be provided for disposal of condensate and to prevent dripping of condensate on the heating element. [NFPA 54:10.3.8]
Boilers,
where used in conjunction with refrigeration systems,
shall be installed so that the chilled medium is piped in parallel with the heating boiler with appropriate valves to prevent
the chilled medium from entering the heating boiler.
[NFPA 54:10.3.9.1]
Where hot water heating boilers are connected to heating coils located in air-handling units where they can be exposed to refrigerated air circulation, such boilerpiping systems shall be equipped with flow control valves or other automatic means to prevent gravity circulation of the boiler water during the cooling cycle. [NFPA 54:10.3.9.2]
Upright furnaces
shall be permitted to be installed in an attic, furred, or
under-floor space exceeding 5 feet (1524 mm) in height, provided
the required listings and furnace and duct clearances are
observed. Horizontal furnaces shall be permitted to be
installed in an attic, furred, or under-floor space, provided the
required listings and furnace and duct clearances are observed.
Factory-built solid-fuel-fired furnaces shall comply with UL 391 and shall be installed in accordance with the manufacturer's installation
instructions.
Commercial
or industrial gas-fired heaters shall comply with UL 795 and shall be installed in accordance with the manufacturer's installation instructions.
Electric central heating furnaces shall comply with UL 1995 or UL 60335-2-40 and shall be installed in accordance with the manufacturer's installation instructions.
The installation of duct furnaces shall
comply with the following clearance requirements:
Listedduct furnaces shall be installed with clearances of
not less than 6 inches (152 mm) between adjacent walls,
ceilings, and floors of combustible material and the furnace
draft hood. Furnaces listed for installation at lesser
clearances shall be installed in accordance with their listings
and the manufacturer's installation instructions. In
no case shall the clearance be such as to interfere with
combustion air and accessibility.
Unlisted duct furnaces shall be installed with clearances
to combustible material in accordance with the clearances
specified for unlisted furnaces and boilers in Table
904.2.2. Combustible floors under unlisted duct furnaces
shall be protected in an approved manner.
Where a duct furnace is installed so
that supply ducts carry air circulated by the furnace to areas
outside the space containing the furnace, the return air shall also be handled by a duct(s) sealed to the furnace casing and
terminating outside the space containing the furnace. The duct
furnace shall be installed on the positive-pressure side of the
circulating air blower. [NFPA 54:10.10.5]
A duct furnace shall not be installed in conjunction
with a refrigeration coil where circulation of cooled air is provided by the blower.
Exception: Where the blower has sufficient capacity to overcome
the external static resistance imposed by the duct system,
furnace, and the cooling coil and the air throughput
necessary for heating or cooling, whichever is greater. [NFPA 54:10.10.6.1]
Duct furnaces used in conjunction with coolingappliances
shall be installed in parallel with or on the
upstream side of cooling coils to avoid condensation
within heating elements. With a parallel flow arrangement,
the dampers or other means used to control the flow of air shall be sufficiently tight to prevent any circulation
of cooled air through the unit.
Exception: Where the duct furnace has been specifically
listed for downstream installation. [NFPA 54:10.10.6.2]
Where duct furnaces are to be located upstream from
cooling units, the cooling unit shall be so designed or
equipped as to not develop excessive temperatures or
pressures. [NFPA 54:10.10.6.3]
Where a duct furnace is installed downstream of an evaporative cooler or air washer, the heat exchanger shall be constructed of corrosion-resistant materials. Stainless steel, ceramic-coated steel, and an aluminum-coated steel in which the bond between the steel and the aluminum is an iron-aluminum alloy are considered to be corrosion resistant. Air washers operating with chilled water that deliver air below the dew point of the ambient air at the duct furnace shall be considered as refrigeration systems. [NFPA 54:10.10.6.4]
Duct furnaces installed in garages for more
than three motor vehicles or in aircraft hangars shall be of a listed type and shall be installed in accordance with Section 303.11 and Section 303.12. [NFPA 54:10.10.7]
Electric duct heaters installed within an air duct shall be listed and labeled in accordance
with UL 1996 and designed for the maximum air temperature.
The duct heater and fan shall be interlocked such that the electric
duct heater operates when the fan is operating.
Duct heaters shall be installed in
accordance with the manufacturer's installation instructions,
and shall not create a hazard to persons or property.
Where installed 4 feet (1219 mm) or less from a heat
pump or air conditioner, the duct heater shall be listed
for such installation.
A working space clearance shall be maintained to permit replacement of controls and heating elements and for adjusting and cleaning of controls. The working space for energized equipment shall comply with theCalifornia Electrical Code.
The installation of floor furnaces shall
comply with the following requirements:
Listedfloor furnaces shall be installed in accordance with
their listing and the manufacturer's installation instructions.
Unlisted floor furnaces shall not be installed on combustible
floors.
Thermostats controlling floor furnaces shall not be
located in a room or space that is capable of being separated
from the room or space in which the register of the
floor furnace is located.
Floor furnaces shall
be provided with temperature limit controls in accordance
with the following requirements:
Listed automatically operated floor furnaces shall be
equipped with temperature limit controls. [NFPA
54:10.11.2.1]
Unlisted automatically operated floor furnaces shall be
equipped with a temperature limit control arranged to
shut off the flow of gas to the burner in the event the temperature
at the warm air outlet register exceeds 350°F
(177°C) above room temperature. [NFPA 54:10.11.2.2]
The following provisions apply to furnaces
that serve one story:
Floors. Floor furnaces shall not be installed in the floor
of any doorway, stairway landing, aisle, or passageway
of any enclosure, public or private, or in an exitway from
any such room or space.
Walls and Corners. The register of a floor furnace with a horizontal warm air outlet shall not be placed closer than
6 inches (152 mm) from the nearest wall. A distance of at
least 18 inches (457 mm) from two adjoining sides of the
floor furnace register to walls shall be provided to eliminate
the necessity of occupants walking over the warm
air discharge. The remaining sides shall be a minimum of
6 inches (152 mm) from a wall. Wall register models shall
not be placed closer than 6 inches (152 mm) to a corner.
Draperies. The furnace shall be placed so that a door,
drapery, or similar object cannot be nearer than 12 inches
(305 mm) to any portion of the register of the furnace.
[NFPA 54:10.11.4]
The lowest portion of the floor furnace shall have at least a 6 inch (152 mm) clearance from the general ground level. A reduced clearance to a minimum of 2 inches (51 mm) shall be permitted, provided the lower 6 inches (152 mm) portion of the floor furnace is sealed by the manufacturer to prevent entrance of water. Where these clearances are not present, the ground below and to the sides shall be excavated to form a "basin-like" pit under the furnace so that the required clearance is provided beneath the lowest portion of the furnace. A 12 inch (305 mm) clearance shall be provided on all sides except the control side, which shall have an 18 inch (457 mm) clearance. [NFPA 54:10.11.7]
The space in which any floor furnace is installed shall be accessible by an opening in the foundation not less than 24 inches by 18 inches (610 mm by 457 mm) or by a trapdoor not less than 24 inches by 24 inches (610 mm by 610 mm) in any cross-section thereof, and a passageway not less than 24 inches by 18 inches (610 mm by 457 mm) in any cross-section thereof. [NFPA 54:10.11.8]
Where the excavation exceeds 12 inches (305 mm) in depth or water seepage is likely to collect, a watertight copper pan, concrete pit, or other suitable material shall be used, unless adequate drainage is provided or the appliance is sealed by the manufacturer to meet this condition. A copper pan shall be made of not less than 16 ounces per square foot (oz/ft2) (4.9 kg/m2) sheet copper. The pan shall be anchored in place so as to prevent floating, and the walls shall extend at least 4 inches (102 mm) above the ground level with at least a 6 inches (152 mm) clearance on all sides, except on the control side, which shall have at least an 18 inch (457 mm) clearance. [NFPA 54:10.11.9]
Listedfloor furnaces shall be permitted to be installed in an upper floor, provided the furnace assembly projects below into a utility room, closet, garage, or similar nonhabitable space. In such installations, the floor furnace shall be enclosed completely (entirely separated from the nonhabitable space) with means for air intake to meet the provisions of Section 701.0, with access for servicing, minimum furnace clearances of 6 inches (152 mm) to all sides and bottom, and with the enclosure constructed of Portland cement plaster or metal lath or other noncombustible material. [NFPA 54:10.11.11]
Listedfloor furnaces
installed in the first or ground floors of buildings shall not be
required to be enclosed unless the basements of these buildings
have been converted to apartments or sleeping quarters,
in which case the floor furnace shall be enclosed as specified
for upper floor installations and shall project into a nonhabitable
space. [NFPA 54:10.11.12]
Listed wall furnaces shall be installed in
accordance with their listings and the manufacturer's installation
instructions. Wall furnaces installed in or attached to combustible material shall be listed for such installation.
Vented wall furnaces connected to a Type B-W gas vent system listed only for
a single story shall be installed only in single-story buildings
or the top story of multistory buildings. Vented wall
furnaces connected to a Type B-W gas vent system listed
for installation in multistory buildings shall be permitted
to be installed in single-story or multistory buildings.
Type B-W gas vents shall be attached directly to a solid
header plate that serves as a firestop at that point and that
shall be permitted to be an integral part of the vented wall
furnace, as illustrated in Figure 907.1.2. The stud space
in which the vented wall furnace is installed shall be ventilated
at the first ceiling level by installation of the ceiling
plate spacers furnished with the gas vent. Firestop
spacers shall be installed at each subsequent ceiling or
floor level penetrated by the vent. [NFPA 54:10.26.1.3]
Direct vent wall furnaces shall be installed with the vent air intake terminal in the outdoors. The thickness of the walls on which the furnace is mounted shall be within the range of wall thickness marked on the furnace and covered in the manufacturer's installation instructions. [NFPA 54:10.26.1.4]
Panels,
grilles, and access doors that are required to be removed
for normal servicing operations shall not be attached to
the building. For additional information on the venting of
wall furnaces, see Section 802.0. [NFPA 54:10.26.1.5]
Wall furnaces shall be located so as not to
cause a hazard to walls, floors, curtains, furniture, or doors.
Wall furnaces installed between bathrooms and adjoining
rooms shall not circulate air from bathrooms to other parts of
the building. [NFPA 54:10.26.2]
Commercial electric clothes dryers shall comply with UL 1240 and installed in accordance with the manufacturer's installation instructions. Residential and coin-operated electric clothes dryers shall comply with UL 2158 and installed in accordance with the manufacturer's installation instructions.
The installation of clothes dryers
shall comply with the following requirements:
ListedType 1 clothes dryers shall be installed with
a clearance of not less than 6 inches (152 mm) from
adjacent combustible material. Clothes dryerslisted
for installation at reduced clearances shall be
installed in accordance with their listing and the
manufacturer's installation instructions. Type 1
clothes dryers installed in closets shall be listed for
such installation.
ListedType 2 clothes dryers shall be installed with
clearances of not less than that shown on the marking
plate and in the manufacturer's instructions.
Type 2 clothes dryers designed and marked, "For use
only in noncombustible locations," shall not be
installed elsewhere.
Decorative appliances for
installation in vented fireplaces shall not be installed in bathrooms
or bedrooms unless the appliance is listed and the bedroom
or bathroom has the required volume in accordance with
Section 701.4. [NFPA 54:10.6.1][OSHPD 1, 1R, 2, 4 & 5] A vented decorative appliance shall not be located in any hospital,
skilled nursing facility, intermediate care facility, or correctional treatment center.
A decorative appliance for installation in a vented fireplace shall be installed only in a vented fireplace having a working chimney flue and constructed of noncombustible materials. These appliances shall not be thermostatically controlled. [NFPA 54:10.6.2]
TABLE 911.2 FREE OPENING AREA OF CHIMNEYDAMPER FOR VENTING FLUE GASES FROM UNLISTED DECORATIVE APPLIANCES FOR INSTALLATION IN VENTED FIREPLACES [NFPA 54:TABLE 10.6.2.3]
For SI units: 1 foot = 304.8 mm, 1000 British thermal units per hour = 0.293 kW, 1 square inch = 0.000645 m2
* The first six minimum permanent free openings [8 square inches (0.005 m2) to 51 square inches (0.03 m2)] correspond approximately to the cross-sectional areas of chimneys having diameters of 3 inches (76 mm) through 8 inches (203 mm), respectively. The 64 square inch (0.04 m2) opening corresponds to the cross-sectional area of a standard 8 inch (203 mm) by 8 inch (203 mm) chimney tile.
A listed decorative appliance for installation in a vented fireplace shall
be installed in accordance with its listing and the manufacturer's
installation instructions.
An unlisted decorative appliance for installation in a vented fireplace
shall be installed in a fireplace having a permanent free
opening, based on appliance input rating and chimney
height, equal to or greater than that specified in Table 911.2. [NFPA 54:10.6.2.3]
The installation of vented gas fireplaces shall comply with the following requirements:
[HCD 1 & HCD 2] Any newly installed gas fireplace shall be a direct-vent sealed-combustion type.
Listed vented gas fireplaces shall be installed in accordance with their listing and the manufacturer's installation instructions and where installed in or attached to combustible material shall be specifically listed for such installation.
Unlisted vented gas fireplaces shall not be installed in or attached to combustible material. They shall have a clearance at the sides and rear of not less than 18 inches (457 mm). Combustible floors under unlisted vented gas fireplaces shall be protected in an approved manner. Unlisted appliances of other than the direct vent type shall be equipped with a draft hood and shall be vented in accordance with Section 802.0. Appliances that use metal, asbestos, or ceramic material to direct radiation to the front of the appliance shall have a clearance of 36 inches (914 mm) in front and, where constructed with a double back of metal or ceramic, shall be installed with a clearance of not less than 18 inches (457 mm) at the sides and 12 inches (305 mm) at the rear.
Panels, grilles, and access doors that are required to be removed for normal servicing operations shall not be attached to the building.
Direct vent gas fireplaces shall be installed with the vent-air intake terminal in the outdoors and in accordance with the manufacturer's installation instructions.
A gasketed fireplace
door shall not be installed on a factory-built fireplace,
except where the fireplace system has been tested
in accordance with UL 127.
Heat exchangers, glass
doors assemblies, combustion air vents, and termination caps
shall comply with UL 907 and installed in accordance with
the manufacturer's installation instructions.
Non-recirculating direct
gas-fired industrial air heaters shall not serve any area containing
sleeping quarters. Non-recirculating direct gas-fired
industrial air heaters shall not recirculate room air. [NFPA
54:10.8.2.1, 10.8.2.2]
Non-recirculating direct gas-fired industrial air heaters shall be provided with access for removal of burners; for replacement of motors, controls, filters, and other working parts; and for adjustment and lubrication of parts requiring maintenance. [NFPA 54:10.8.3.3]
Non-recirculating direct gas-fired industrial air heaters shall be installed with a clearance from combustible materials of not less than that shown on the rating plate and the manufacturer's instructions. [NFPA 54:10.8.4]
All air to the non-recirculating direct gas-fired industrial air heater shall be ducted directly from outdoors.
Where outdoor air dampers or closing louvers are used, they shall be verified to be in the open position prior to main
burner operation. [NFPA 54:10.8.5]
Non-recirculating direct gas-fired industrial air heaters with
valve train components equipped with atmospheric vents, gas reliefs, or bleeds shall have their vent lines, gas reliefs, or
bleeds lead to a safe point outdoors. Means shall be employed
on these lines to prevent water from entering and to prevent
blockage from insects and foreign matter. An atmospheric vent
line shall not be required to be provided on a valve train component
equipped with a listed vent limiter. [NFPA 54:10.8.6]
The design of the installation shall include adequate provisions to permit the non-recirculating
direct gas-fired industrial air heater to operate at its rated airflow
without overpressurizing the space served by the heater
by taking into account the structure's designed infiltration rate,
properly designed relief openings, or an interlocked powered
exhaust system, or a combination of these methods. [NFPA
54:10.8.7]
Louver or counterbalanced
gravity damper relief openings shall be permitted.
Where motorized dampers or closeable louvers
are used, they shall be proved to be in their open position
prior to main burner operation. [NFPA 54:10.8.7.2]
Recirculating direct gas-fired
industrial air heaters shall not serve any area containing
sleeping quarters. Recirculating direct gas-fired industrial air
heaters shall not recirculate room air in buildings that contain
flammable solids, liquids, or gases; explosive materials; or substances that can become toxic when exposed to flame or
heat. [NFPA 54:10.9.2.1, 10.9.2.2]
Recirculating direct gas-fired industrial air heaters shall be installed with a clearance from combustible materials of not less than that shown on the rating plate and the manufacturer's instructions. [NFPA 54:10.9.4]
Ventilation air to the recirculating direct
gas-fired industrial air heater shall be ducted directly from outdoors.
Air to the recirculating direct gas-fired industrial air
heater in excess of the minimum ventilation air specified on
the heater's rating plate shall be taken from the building, ducted directly from outdoors, or a combination of both.
Where outdoor air dampers or closing louvers are used, they
shall be verified to be in the open position prior to main burner
operation. [NFPA 54:10.9.5]
Recirculating direct gas-fired industrial air heaters with valve
train components equipped with atmospheric vents, gas reliefs,
or bleeds shall have their vent lines, gas reliefs, or bleeds lead
to a safe point outdoors. Means shall be employed on these
lines to prevent water from entering and to prevent blockage
from insects and foreign matter. An atmospheric vent line shall
not be required to be provided on a valve train component
equipped with a listed vent limiter. [NFPA 54:10.9.6]
The design of the installation shall
include adequate provisions to permit the recirculating direct gas-fired industrial air heater to operate at its rated airflow without
overpressurizing the space served by the heater by taking
into account the structure's designed infiltration rate, properly
designed relief openings or an interlocked powered exhaust
system, or a combination of these methods. [NFPA 54:10.9.7]
Louver or counterbalanced gravity damper relief openings shall be permitted.
Where motorized dampers or closeable louvers are used, they shall be proved to be in their open position
prior to main burner operation. [NFPA 54:10.9.7.2]
Where approved by the Authority Having Jurisdiction, one listed wall-mounted unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bathroom, provided that the input rating does not exceed 6000 Btu/h (1.76 kW) and combustion and ventilation air is provided as specified in Section 902.2.
Where approved by the Authority Having Jurisdiction, one listed wall-mounted unvented room heater equipped with an oxygen depletion safety shutoff system shall be permitted to be installed in a bedroom, provided that the input rating does not exceed 10 000 Btu/h (3 kW) and combustion and ventilation air is provided as specified in Section 902.2. [NFPA 54:10.22.1]
A room heater shall be placed so as
not to cause a hazard to walls, floors, curtains, furniture,
doors where open, and to the free movements of persons
within the room. Heaters designed and marked, "For use
in noncombustible fireplace only," shall not be installed
elsewhere. Listedroom heaters shall be installed in accordance
with their listings and the manufacturer's installation
instructions. In no case shall the clearances be such as
to interfere with combustion air and accessibility. Unlisted
room heaters shall be installed with clearances from combustible
material not less than the following:
Circulating type room heaters having an outer jacket
surrounding the combustion chamber, arranged with
openings at top and bottom so that air circulates
between the inner and outer jacket, and without openings
in the outer jacket to permit direct radiation, shall
have clearance at sides and rear of not less than 12
inches (305 mm).
Radiating type room heaters other than those of the
circulating type described in Section 916.2.3(1) shall
have clearance at sides and rear of not less than 18
inches (457 mm), except that heaters that make use of
metal, asbestos, or ceramic material to direct radiation
to the front of the heater shall have a clearance of 36
inches (914 mm) in front and, where constructed with
a double back of metal or ceramic, shall be permitted
to be installed with a clearance of 18 inches (457 mm)
at sides and 12 inches (305 mm) at rear. Combustible
floors under unlisted room heaters shall be protected in
an approved manner.
Suspended-type unit heaters shall be safely and adequately supported, with due consideration given to their
weight and vibration characteristics. Hangers and brackets shall be of noncombustible material. [NFPA 54:10.25.1]
Suspended-type unit heaters shall comply with the following requirements:
A listedunit heater shall be installed with clearances from combustible material of not less than 18 inches (457 mm) at the sides, 12 inches (305 mm) at the bottom, and 6 inches (152 mm) above the top where the unit heater has an internal draft hood, or 1 inch (25.4 mm) above the top of the sloping side of a vertical draft hood. A unit heaterlisted for reduced clearances shall be installed in accordance with its listing and the manufacturer's installation instructions.
Floor-mounted-type unit heaters shall comply with the following requirements:
A listedunit heater shall be installed with clearances
from combustible material at the back and one side
of not less than 6 inches (152 mm). Where the flue
gases are vented horizontally, the 6 inch (152 mm)
clearance shall be measured from the draft hood or
vent instead of the rear wall of the unit heater. A unit
heater listed for reduced clearances shall be installed
in accordance with its listing and the manufacturer's
installation instructions.
Floor-mounted-type unit heaters installed on combustible
floors shall be listed for such installation.
Combustible floors under unlisted floor-mounted unit
heaters shall be protected in an approved manner.
Clearances for servicing shall be in accordance with
the manufacturer's instructions.
Unit heaters installed in garages for more
than three motor vehicles or in aircraft hangars shall be of a listed type and shall be installed in accordance with Section 303.11 and Section 303.12. [NFPA 54:10.25.5]
Listed floor-mounted food service appliances, such as ranges for hotels and restaurants, deep fat fryers, unit broilers, kettles, steam cookers, steam generators, and baking and roasting ovens, shall be installed not less than 6 inches (152 mm) from combustible material except that at least a 2 inch (51 mm) clearance shall be maintained between a draft hood and combustible material. Floor-mounted food service applianceslisted for installation at lesser clearances shall be installed in accordance with its listing and the manufacturer's installation instructions. Appliances designed and marked, "For use only in noncombustible locations," shall not be installed elsewhere.
Unlisted floor-mounted
food service appliances shall be installed to provide a
clearance to combustible material of not less than 18 inches (457 mm) from the sides and rear of the appliance and from the vent
connector and not less than 48 inches (1219 mm) above cooking
tops and at the front of the appliance.
Clearances for unlisted appliances installed in partially enclosed areas such as alcoves shall not be reduced. Reduced
clearances for unlisted appliances installed in rooms that are not
partially enclosed shall be in accordance with Table 303.10.1. [NFPA 54:10.12.2]
Listed floor-mounted
food service appliances that are listed specifically for
installation on floors constructed of combustible material shall
be permitted to be installed on combustible floors in accordance with its listing and the manufacturer's installation instructions.
Floor-mounted food service appliances that are not listed for mounting on a combustible floor shall be mounted in accordance with Section 918.4 or be mounted in accordance with one of the following:
Where the appliance is set on legs that provide not less than 18 inches (457 mm) open space under the base of the appliance or where it has no burners and no portion of any oven or broiler within 18 inches (457 mm) of the floor, it shall be permitted to be mounted on a combustible floor without special floor protection, provided at least one sheet metal baffle is between the burner and the floor.
Where the appliance is set on legs that provide not less than 8 inches (203 mm) open space under the base of the appliance, it shall be permitted to be mounted on combustible floors, provided the floor under the appliance is protected with not less than 3/8 of an inch (9.5 mm) insulating millboard covered with sheet metal not less than 0.0195 of an inch (0.4953 mm) thick. The preceding specified floor protection shall extend not less than 6 inches (152 mm) beyond the appliance on all sides.
Where the appliance is set on legs that provide not less than 4 inches (102 mm) under the base of the appliance, it shall be permitted to be mounted on combustible floors, provided the floor under the appliance is protected with hollow masonry not less than 4 inches (102 mm) in thickness covered with sheet metal not less than 0.0195 of an inch (0.4953 mm) thick. Such masonry courses shall be laid with ends unsealed and joints matched in such a way as to provide for free circulation of air through the masonry.
Where the appliance does not have legs at least 4 inches (102 mm) high, it shall be permitted to be mounted on combustible floors, provided the floor under the appliance is protected by two courses of 4 inch (102 mm) hollow clay tile, or equivalent, with courses laid at right angles and with ends unsealed and joints matched in such a way as to provide for free circulation of air through such masonry courses, and covered with steel plate not less than 3/16 of an inch (4.8 mm) in thickness. [NFPA 54:10.12.3.2]
Listed
floor-installed food service appliances that are designed and marked "For use only in noncombustible locations" shall be
installed on floors of noncombustible construction with noncombustible
flooring and surface finish and with no combustible
material against the underside thereof, or on
noncombustible slabs or arches having no combustible material
against the underside thereof. Such construction shall in all cases extend not less than 12 inches (305 mm) beyond the
appliance on all sides. [NFPA 54:10.12.4.1, 10.12.4.2]
Listed and unlisted food service ranges shall be installed to provide clearance to combustible material not less than 18 inches (457 mm) horizontally for a distance of up to 2 feet (610 mm) above the surface of the cooking top where the combustible material is not completely shielded by high shelving, warming closet, or other system. Reduced combustible material clearances are permitted where protected in accordance with Table 303.10.1. [NFPA 54:10.12.5]
Floor-mounted appliances with
casters shall be listed for such construction and shall be
installed in accordance with the manufacturer's installation
instructions for limiting the movement of the appliance to prevent
strain on the connection. [NFPA 54:10.12.6]
Means shall be provided to properly ventilate the space in which a food service appliance is installed to permit proper combustion of the gas. [NFPA 54:10.12.8]
A vertical distance of not less than 48 inches (1219 mm) shall be provided between the top of all food service hot plates and griddles and combustible material. [NFPA 54:10.13.1]
Listed food
service counter appliances such as hot plates and griddles,
food and dish warmers, and coffee brewers and urns, where
installed on combustible surfaces, shall be set on their own
bases or legs and shall be installed with a horizontal clearance
of not less than 6 inches (152 mm) from combustible material, except that not less than a 2 inches (51 mm) clearance
shall be maintained between a draft hood and combustible
material. Food service counter applianceslisted for
installation at lesser clearances shall be installed in accordance
with their listing and the manufacturer's installation
instructions.
Unlisted food
service hot plates and griddles shall be installed with a horizontal
clearance from combustible material of not less than 18
inches (457 mm). Unlisted gas food service counter appliances,
including coffee brewers and urns, waffle bakers, and
hot water immersion sterilizers, shall be installed with a horizontal
clearance from combustible material of not less than
12 inches (305 mm). Reduced clearances for gas food service
counter appliances shall be in accordance with Table
303.10.1. Unlisted food and dish warmers shall be installed
with a horizontal clearance from combustible material of not
less than 6 inches (152 mm). [NFPA 54:10.13.3]
Unlisted food service counter appliances shall not be set on combustible material unless they have legs that provide not less than 4 inches (102 mm) of open space below the burners and the combustible surface is protected with insulating millboard at least 1/4 of an inch (6.4 mm) thick covered with sheet metal not less than 0.0122 of an inch (0.3099 mm) thick, or with equivalent protection. [NFPA 54:10.13.4]
Electric
household cooking appliances designed for permanent
installations shall be installed in accordance with the manufacturer's
installation instructions. Household electric ranges
shall comply with UL 858.
The clearances specified as follows shall not interfere
with combustion air, accessibility for operation, and servicing:
Listed floor-mounted household cooking appliances,
where installed on combustible floors, shall be set
on their own bases or legs and shall be installed in
accordance with their listing and the manufacturer's
installation instructions.
Listed household cooking appliances with listed gas
room heater sections shall be installed so that the
warm air discharge side shall have a clearance of not
less than 18 inches (457 mm) from adjacent combustible
material. A clearance of not less than 36
inches (914 mm) shall be provided between the top
of the heater section and the bottom of cabinets.
Listed household cooking appliances that include a
solid or liquid fuel-burning section shall be spaced
from combustible material and otherwise installed
in accordance with their listing and the manufacturer's
installation instructions for the supplementary
fuel section of the appliance.
Unlisted floor-mounted household cooking appliances
shall be installed with not less than 6 inches
(152 mm) clearance at the back and sides to combustible
material. Combustible floors under unlisted
appliances shall be protected in an approved manner.
Household cooking appliances shall have a vertical clearance above the cooking top of not less than 30 inches (762 mm) to combustible material or metal cabinets. A minimum clearance of 24 inches (610 mm) is permitted where one of the following is installed:
The underside of the combustible material or metal cabinet above the cooking top is protected with not less than 1/4 of an inch (6.4 mm) insulating millboard covered with sheet metal not less than 0.0122 of an inch (0.3099 mm) thick.
A metal ventilating hood of sheet metal not less than 0.0122 of an inch (0.3099 mm) thick is installed above the cooking top with a clearance of not less than 1/4 of an inch (6.4 mm) between the hood and the underside of the combustible material or metal cabinet, and the hood is as wide as the appliance and is centered over the appliance.
A listed cooking appliance or microwave oven installed over a listed cooking appliance shall be in accordance with the terms of the upper appliance's listing and the manufacturer's installation instructions. Microwave ovens shall comply with UL 923.
Listed built-in household cooking appliances shall be installed in accordance with their
listing and the manufacturer's installation instructions.
The installation shall not interfere with combustion air,
accessibility for operation, and servicing. Unlisted built-in
household cooking appliances shall not be installed in
or adjacent to combustible material.
Built-in top (or surface) cooking appliances shall have a vertical clearance above the cooking top of not less than 30 inches (762 mm) to combustible material or metal cabinets. A clearance of not less than 24 inches (610 mm) is permitted where one of the following is installed:
The underside of the combustible material or metal cabinet above the cooking top is protected with not less than 1/4 of an inch (6.4 mm) insulating millboard covered with sheet metal not less than 0.0122 of an inch (0.3099 mm) thick.
A metal ventilating hood of sheet metal not less than 0.0122 of an inch (0.3099 mm) thick is installed above the cooking top with a clearance of not less than 1/4 of an inch (6.4 mm) between the hood and the underside of the combustible material or metal cabinet, and the hood not less than the width of the appliance and is centered over the appliance.
A listed cooking appliance or microwave oven installed over a listed cooking appliance shall be in accordance with the terms of the upper appliance listing and the manufacturer's installation instructions. Microwave ovens shall comply with UL 923.
Commercial
wood-fired baking ovens (refractory type) shall comply
with UL 2162 and installed in accordance with the
manufacturer's installation instructions.
Unlisted open-top broiler units shall be installed in accordance with the manufacturer's instructions but shall not be installed in combustible material. [NFPA 54:10.18.2]
Domestic open-top broiler units shall be provided with a metal ventilating hood not less than 0.0122 of an inch (0.3099 mm) thick with a clearance of not less than 1/4 of an inch (6.4 mm) between the hood and the underside of combustible material or metal cabinets. A clearance of at least 24 inches (610 mm) shall be maintained between the cooking top and the combustible material or metal cabinet, and the hood shall be at least as wide as the open-top broiler unit and centered over the unit. Listed domestic open-top broiler units incorporating an integral exhaust system and listed for use without a ventilating hood shall not be required to be provided with a ventilating hood if installed in accordance with Section 920.3.2(1). [NFPA 54:10.18.3]
Unlisted outdoor cooking appliances shall be installed outdoors with clearances to combustible
material of not less than 36 inches (914 mm) at the sides and
back and not less than 48 inches (1219 mm) at the front. In no case shall the appliance be located under overhead combustible
construction. [NFPA 54:10.19.2]
Clearances for unlisted illuminating appliances shall comply with the following:
Unlisted enclosed illuminating appliances installed outdoors
shall be installed with clearances in any direction from combustible material of not less than 12 inches (305
mm). [NFPA 54:10.15.2.1(1)]
Unlisted enclosed illuminating appliances installed
indoors shall be installed with clearances in any direction from combustible material of not less than 18 inches
(457 mm). [NFPA 54:10.15.2.1(2)]
Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustible material not less than that specified in Table 924.2.1. The distance from ground level to the base of the burner shall be a minimum of 7 feet (2134 mm) where installed within 2 feet (610 mm) of walkways. Lesser clearances shall be permitted to be used where acceptable to the Authority Having Jurisdiction.
Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orifice or other limiting devices that will maintain a flame height consistent with the clearance from combustible material, as given in Table 924.2.1.
Appliances designed for flame heights in excess of 30 inches (762 mm) shall be permitted to be installed if acceptable to the Authority Having Jurisdiction. Such appliances shall be equipped with a safety shutoff device or automatic ignition.
Illuminating appliances
designed for wall or ceiling mounting shall be securely attached to substantial structures in such a manner that they
are not dependent on the gas piping for support. [NFPA
54:10.15.3]
Illuminating appliances
designed for post mounting shall be securely and rigidly
attached to a post. Posts shall be rigidly mounted. The
strength and rigidity of posts greater than 3 feet (914 mm) in height shall be at least equivalent to that of a 21/2 inch (64 mm) diameter post constructed of 0.064 of an inch (1.626 mm)
thick steel or a 1 inch (25.4 mm) Schedule 40 steel pipe. Posts
3 feet (914 mm) or less in height shall not be smaller than a
3/4 of an inch (19.1 mm) Schedule 40 steel pipe. Drain openings shall be provided near the base of posts where water collecting
inside the posts is possible. [NFPA 54:10.15.4]
Where an appliance
pressure regulator is not supplied with an illuminating
appliance and the service line is not equipped with a service
pressure regulator, an appliance pressure regulator shall be
installed in the line serving one or more illuminating appliances. [NFPA 54:10.15.5]
Factory-built commercial incinerators and crematories shall comply
with UL 2790 and installed in accordance with the
manufacturer's installation instructions.
Suspended-type infrared heaters shall be
fixed in position independent of gas and electric supply lines.
Hangers and brackets shall be of noncombustible material.
Heaters subject to vibration shall be provided with vibration-isolating hangers. [NFPA 54:10.17.1]
The installation of infrared heaters shall comply with the following clearance requirements:
Listed heaters shall be installed with clearances from
combustible material in accordance with their listing and
the manufacturer's installation instructions.
In locations used for the storage of combustible materials,
signs shall be posted to specify the maximum permissible
stacking height to maintain required clearances
from the heater to the combustibles.
Where unvented infrared heaters are used, natural or mechanical means shall
be provided to supply and exhaust at least 4 ft3/min/1000 Btu/h (0.38 m3/min/kW) input of installed heaters. [NFPA 54:10.17.3.1]
Overhead heaters installed in garages for
more than three motor vehicles or in aircraft hangars shall be
of a listed type and shall be installed in accordance with Section
303.11 and Section 303.12. [NFPA 54:10.17.4]
The installation of pool heaters shall comply with the following requirements:
In no case shall the clearances be such as to interfere with
combustion air, draft hood, or vent terminal clearance
and relief, and accessibility for servicing.
A listed pool heater shall be installed in accordance with
its listing and the manufacturer's installation instructions.
An unlisted pool heater shall be installed with a clearance
of not less than 12 inches (305 mm) on the sides
and the rear. A combustible floor under an unlisted pool
heater shall be protected in an approved manner.
An unlisted pool heater shall be provided with overtemperature
protection or overtemperature and overpressure protection
by means of an approved device(s). [NFPA 54:10.20.3.1]
Where a pool heater is provided with over-temperature protection only and is
installed with any device in the discharge line of the
heater that can restrict the flow of water from the heater
to the pool (such as a check valve, shutoff valve, therapeutic
pool valving, or flow nozzles), a pressure-relief
valve shall be installed either in the heater or between
the heater and the restrictive device. [NFPA 54:10.20.3.2]
Where an integral bypass system is
not provided as a part of the pool heater, a bypass line and
valve shall be installed between the inlet and outlet piping for
use in adjusting the flow of water through the heater. [NFPA
54:10.20.4]
A pool heater listed for outdoor installation
shall be installed with the venting means supplied by the manufacturer
and in accordance with the manufacturer's installation instructions. [NFPA 54:10.20.5]
Refrigerators shall be provided with
clearances for ventilation at the top and back in accordance
with the manufacturer's instructions. Where such instructions
are not available, at least 2 inches (51 mm) shall be provided between the back of the refrigerator and the wall at least 12
inches (305 mm) above the top. [NFPA 54:10.21.1]
Where an accessory kit is used for conveying
air for burner combustion or unit cooling to the refrigerator
from areas outside the room in which it is located, or
for conveying combustion products diluted with air containing
waste heat from the refrigerator to areas outside the room
in which it is located, the kit shall be installed in accordance with the refrigerator manufacturer's instructions. [NFPA 54:10.21.2]
A listed gas-fired toilet shall be installed in accordance with its listing and the manufacturer's installation instructions, provided that the clearance shall be such to afford ready accessibility for use, cleanout, and necessary servicing.
Vents or vent connectors that are capable of
being contacted during casual use of the room in which the
toilet is installed shall be protected or shielded to prevent such contact. [NFPA 54:10.24.3]
[Not adopted by HCD]Appliances
installed in manufactured housing after the initial sale shall be
listed for installation in manufactured housing, or approved,
and shall be installed in accordance with the requirements of
this code and the manufacturer's installation instructions.
Appliances installed in the living space of manufactured
housing shall be in accordance with the requirements of Section
701.0. [NFPA 54:10.29]
The provisions of this section apply to kilns
used for ceramics that have a maximum interior volume of 20
cubic feet (0.57 m3) and are used for hobby or noncommercial purposes.
All electrical equipment used as part of, or in connection with, the installation of a kiln shall be in accordance with the requirements in the electrical code. Electric kilns shall be listed and labeled in accordance with UL 499.
The sides and tops of kilns shall be located not less than 18 inches (457 mm) from a
noncombustible wall surface and 3 feet (914 mm) from
a combustible wall surface. Kilns shall be installed on
noncombustible flooring consisting of not less than 2
inches (51 mm) of solid masonry or concrete extending
not less than 12 inches (305 mm) beyond the base or supporting members of the kiln.
Exception: These clearances shall be permitted to be
reduced, provided the kiln is installed in accordance with
its listing.
In no case shall the clearance on the gas or electrical control side of a kiln be reduced to less than 30 inches (762 mm).
A canopy-type hood shall be installed directly above each kiln. The face opening area of the
hood shall be equal to or greater than the top horizontal
surface area of the kiln. The hood shall be constructed of
not less than 0.024 of an inch (0.61 mm) (No. 24 gauge)
galvanized steel or equivalent and be supported at a
height of between 12 inches (305 mm) and 30 inches
(762 mm) above the kiln by noncombustible supports.
Exception: Electric kilns installed with listed exhaust
blowers shall be permitted to be used where marked as
being suitable for the kiln and installed in accordance
with the manufacturer's installation instructions.
Each hood shall be connected to a gravity ventilation duct extending in a
vertical direction to outside the building. This duct shall
be of the same construction as the hood and shall have a
minimum cross-sectional area of not less than one-fifteenth
of the face opening area of the hood. The duct
shall terminate not less than 12 inches (305 mm) above
a portion of a building within 4 feet (1219 mm) and terminate
not less than 4 feet (1219 mm) from an openable
window or other opening into the building or adjacent
property line. The duct opening to the outside shall be
shielded, without reduction of duct area, to prevent
entrance of rain into the duct. The duct shall be supported
at each section by noncombustible supports.
Kilns shall be installed with minimum clearances as specified in Section 931.5.1. Wherever a kiln is located under a roofed area and is partially enclosed by more than two vertical wall surfaces, a hood and gravity ventilation duct shall be installed in accordance with Section 931.5.2, Section 931.5.3, and Section 603.13.6.
Permanently fixed in place outdoor open
flame decorative appliances shall be installed in accordance
with Section 932.1.1 through Section 932.1.3. [NFPA 54:10.31]
Unlisted outdoor open flame
decorative appliances shall be installed outdoors in accordance
with the manufacturer's installation instructions and
with clearances to combustible material of not less than 36
inches (914 mm) from the sides. In no case shall the appliance
be located under overhead combustible construction.
[NFPA 54:10.31.2]
An evaporative cooler supported by the
building structure shall be installed on a level base and shall
be secured directly or indirectly to the building structure, to
prevent displacement of the cooler.
Modifications made to the supporting framework of buildings
as a result of the installation shall be in accordance
with the requirements of the building code. Openings in
exterior walls shall be flashed in an approved manner in
accordance with the requirements of the building code.
An evaporative cooler supported directly by the ground shall be isolated from the
ground by a level concrete slab extending not less than 3
inches (76 mm) above the adjoining ground level.
Factory-built commercial refrigerators and freezers shall comply with UL 471 or UL 60335-2-89 and shall be installed in accordance with the manufacturer's installation instructions.
Factory-built unit coolers for use in refrigerators, freezers, refrigerated warehouses, and walk-in coolers shall comply with UL 412 or UL 60335-2-89 and shall be installed in accordance with the manufacturer's installation instructions.
Self-containedmechanical refrigeration systems for use in walk-in coolers shall comply with UL 427 or UL 60335-2-89 and shall be installed in accordance with the manufacturer's installation instructions.
High-efficiency particulate air filter units for use in industrial
and laboratory exhaust and ventilation systems shall be
installed in accordance with the manufacturer's installation
instructions.
The installation of compressed natural gas (CNG) fueling (dispensing) systems shall conform to NFPA 52. Residential CNG fueling appliances shall be listed in accordance with CSA NGV 5.1 and installed in accordance to the appliance manufacturer's installation instructions. [NFPA 54:10.28]
