CHAPTER 6
SPECIFIC APPLIANCES
SECTION 601 (IFGC)
GENERAL
SECTION 603 (IFGC)
GAS-FIRED LOG LIGHTERS
601.1 Scope. This chapter shall govern the approval, design,
installation, construction, maintenance, alteration and repair of
the appliances and equipment specifically identified herein.
603.1 General. Gas-fired log lighters shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas-fired log lighters shall be tested in accordance
with IAS 8.
SECTION 602 (IFGC)
DECORATIVE GAS-FIRED APPLIANCES FOR
INSTALLATION IN FIREPLACES
SECTION 604 (IFGC)
VENTED GAS-FIRED DECORATIVE APPLIANCES
602.1 General. Decorative gas-fired appliances for installation in approved solid fuel burning fireplaces shall be
installed in accordance with the manufacturer's installation
instructions. Listed decorative gas-fired appliances for installation in an approved solid fuel burning fireplace shall be
tested in accordance with ANSI 221.60. Manually lighted
natural gas decorative gas appliances shall be tested in accordance with an approved method.
604.1 General. Vented gas-fired decorative appliances shall
be installed in accordance with the manufacturer's installation instructions. Listed vented gas-fired decorative appliances shall be tested in accordance with ANSI 221.50 and
shall be designed and equipped as specified in Section 602.2.
602.2 Flame Safeguard Device. Decorative gas-fired appliances for installation in approved solid fuel-burning fireplaces, with the exception of those tested in accordance with
an approved method, shall utilize a direct ignition device, an
ignitor or a pilot flame to ignite the fuel at the main burner,
and shall be equipped with a flame safeguard device. The
flame safeguard device shall automatically shut off the fuel
supply to a main burner or group of burners when the means
of ignition of such burners becomes inoperative.
604.3 Installation. Unlisted vented decorative appliances
shall not be installed in or attached to combustible material.
Such appliances shall have a clearance at the sides and rear
of not less than 18 inches (46 cm). Combustible floors under
unlisted vented decorative appliances shall be protected in an
approved manner. Such unlisted appliances shall be equipped
with a draft hood and shall be vented in accordance with
Chapter 5.
604.2 Prohibited Installations. Unlisted vented decorative
appliances shall not be installed in bathrooms or bedrooms.
602.3 Unlisted Decorative Appliances. 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 Section 632.
Exception: Appliances that make use of metal or ceramic material to direct radiation to the front of the appliance
shall have a clearance of 36 inches (91 cm) in front and, if
constructed with a double back of metal or ceramic, shall
be permitted to be installed with a clearance of 18 inches
(46 cm) at the sides and 12 inches (30 cm) at the rear.
602.4 Shutoff Valves. Shutoff valves located in the firebox
of a fireplace shall be installed in accordance with the decorative appliance manufacturer's instructions.
604.3.1 Access. Panels, grilles, and access doors that are
required to be removed for normal servicing operations shall
not be attached to the building.
602.5 Prohibited Installations. Decorative gas-fired appliances for installation in fireplaces shall not be installed in
bathrooms or bedrooms unless the appliance is listed and the
bedroom or bathroom is an unconfined space. (See Section
303.3)
SECTION 605 (IFGC)
INCINERATORS AND CREMATORIES
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605.1 General. Incinerators and crematories shall be
installed in accordance with the manufacturer's installation
instructions.
SECTION 606 (IFGC)
COMMERCIAL-INDUSTRIAL INCINERATORS
606.1 Incinerators, Commercial-Industrial. Commercialindustrial type incinerators shall be constructed and installed
in accordance with NFPA 82.
SECTION 607 (IFGC)
VENTED WALL FURNACES
607.1 General. Gas-fired vented wall furnaces shall be
installed in accordance with the manufacturer's installation
instructions. Listed gas-fired vented wall furnaces shall be
tested in accordance with ANSI 221.49.
607.2 Venting. Vented wall furnaces shall be vented in
accordance with Section 503.
607.3 Location. Vented wall furnaces shall be located so as
not to cause a fire hazard to walls, floors, combustible furnishings or doors. Vented wall furnaces installed between
bathrooms and adjoining rooms shall not circulate air from
bathrooms to other parts of the building.
607.4 Door swing. Vented wall furnaces shall be located so
that a door cannot swing within 12 inches (305 mm) of an air
inlet or air outlet of such furnace measured at right angles to
the opening. Doorstops or door closers shall not be installed
to obtain this clearance.
607.5 Ducts Prohibited. Ducts shall not be attached to wall
furnaces. Casing extension boots shall not be installed unless
listed as part of the appliance.
607.6 Access. Vented wall furnaces shall be provided with
access for cleaning of heating surfaces, removal of burners,
replacement of sections, motors, controls, filters and other
working parts, and for adjustments and lubrication of parts
requiring such attention. Panels, grilles and access doors that
are required to be removed for normal servicing operations
shall not be attached to the building construction.
SECTION 608 (IFGC)
FLOOR FURNACES
608.1 General. Gas-fired floor furnaces shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas-fired floor furnaces shall be tested in accordance
with ANSI 221.48.
608.2 Placement. The following provisions apply to floor
furnaces.
1. 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.
2. Walls and Comers. The register of a floor furnace with
a horizontal warm air outlet shall not be placed closer
than 6 inches (15 cm) to the nearest wall. A distance of
at least 18 inches (46 cm) 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 permitted to be placed not closer than 6 inches (15 cm) to
a wall. Wall-register models shall not be placed closer
than 6 inches (15 cm) to a comer.
3. Draperies. The furnace shall be placed so that a door,
drapery, or similar object cannot be nearer than 12
inches (30 cm) to any portion of the register of the furnace.
4. Floor Construction. Floor furnaces shall not be
installed in concrete floor construction built on grade.
5. Thermostat. The controlling thermostat for a floor furnace shall be located within the same room or space as
the floor furnace or shall be located in an adjacent
room or space that is permanently open to the room or
space containing the floor furnace.
608.3 Bracing. The floor around the furnace shall be braced
and headed with a support framework designed in accordance with the Florida Building Code, Building.
608.4 Clearance. The lowest portion of the floor furnace
shall have not less than a 6-inch (152 mm) clearance from the
grade level; except where the lower 6-inch (152 mm) portion
of the floor furnace is sealed by the manufacturer to prevent
entrance of water, the minimum clearance shall be reduced to
not less than 2 inches (51 mm). Where these clearances are
not present, the ground below and to the sides shall be excavated to form a pit under the furnace so that the required
clearance is provided beneath the lowest portion of the furnace. A 12-inch (305 mm) minimum clearance shall be provided on all sides except the control side, which shall have an
18-inch (457 nun) minimum clearance.
608.5 First Floor Installation. Listed floor furnaces
installed in the first or ground floor of buildings shall be
enclosed as specified in Section 608.6 and shall project into
a nonhabitable space if the basements of these buildings have
been converted to apartments or sleeping quarters.
608.6 Upper Floor Installations. Listed floor 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 s e p
arated from the nonhabitable space) with means for air intake
to meet the provisions of Chapter 3, with access for servicing, the minimum furnace clearances of 6 inches (15 cm) to
all sides and bottom, and with the enclosure constructed of
noncombustible material.
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SECTION 609 (IFGC)
DUCT FURNACES
609.1 General. Gas-fired duct furnaces shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas-fired duct furnaces shall be tested in accordance
with ANSI 283.9 or UL 795.
609.2 Clearances. Unlisted duct furnaces shall be installed
with clearances to combustible materials as specified for
unlisted furnaces and boilers in Section 633.
609.3 Access Panels. Ducts connected to duct furnaces shall
have removable access panels on both the upstream and
downstream sides of the furnace.
609.4 Location of Draft Hood and Controls. The controls,
combustion air inlets, and draft hoods for duct furnaces shall
be located outside of the ducts. The draft hood shall be located in the same enclosure from which combustion air is taken.
609.5 Circulating Air. Where a duct furnace is installed so
that supply ducts cany 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.
SECTION 610 (IFGC)
DIRECT GAS-FIRED MAKE-UP AIR HEATERS
610.1 General. Direct gas-fired make-up air heaters shall be
installed in accordance with the manufacturer's installation
instructions. Listed direct gas-fired make-up air heaters shall
be tested in accordance with ANSI 283.4.
610.2 Installation. Direct gas-fired make-up air heaters
shall not be used to supply any area containing sleeping quarters.
610.3 Clearance from Combustible Material. Unlisted
direct gas-fired make-up air heaters shall be installed with
clearances to combustible.materia1of not less than 18 inches
(46 cm). Combustible floors under unlisted floor-mounted
heaters shall be protected in an approved manner. The specified clearances shall not interfere with combustion air,
access for operation, and servicing.
610.4 Outdoor Air. All air handled by a direct gas-fired
make-up air heater, including combustion air, shall be
brought in from outdoors.
Exception: Indoor air added to the outdoor airstream
after the outdoor airstream has passed the combustion
zone.
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610.5 Outdoor Air Louvers. If outdoor air louvers of either
the manual or automatic type are used, such devices shall be
proved in the open position prior to allowing the main burners to operate.
610.6 Controls. Listed direct gas-fired make-up air heaters
shall be equipped with airflow sensing devices, safety shutoff devices, operating temperature controls, and thermally
actuated temperature limit controls in accordance with the
terms of their listings.
Unlisted direct gas-fired make-up air heaters shall be
equipped with:
1. Airflow sensing devices designed and installed so as to
shut off the gas to the main burners upon failure of
either combustion air or main air supply (controls actuated by failure of the power supply to the blower motor
do not meet the intent of this provision);
2. Combustion safeguards, including manual reset safety
shutoff devices; and
3. Operating temperature controls and thermally actuated
manual reset temperature limit controls, the latter of
which shall not permit the discharge air temperature to
exceed 150°F (66OC).
610.7 Input Ratings. Unlisted direct gas-fired make-up air
heaters shall have input ratings such that the ratio of gas input
by volume to the total volume of gas-air mixture discharged
will not exceed 0.2 percent.
610.8 Atmospheric Vents and Gas Reliefs or Bleeds.
Direct gas-fired make-up air heaters with valve train components equipped with atmospheric vents or gas reliefs or
bleeds shall have their atmospheric vent lines or gas reliefs or
bleeds lead to the outdoors. Means shall be employed on
these lines to prevent water from entering and to prevent
blockage by 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.
610.9 Relief Opening. The design of the installation shall
include provision to permit direct gas- fired make-up air
heaters to operate at rated capacity by taking into account the
structure's designed infiltration rate, providing properly
designed relief openings or an interlocked power exhaust
system, or a combination of these methods. The structure's
designed infiltration rate and the size of relief openings shall
be determined by approved engineering methods. Relief
openings shall be permitted to be louvers or counterbalanced
gravity dampers. Motorized dampers or closable louvers
shall be permitted to be used, provided they are verified to be
in their full open position prior to main burner operation.
610.10 Purging. The blower of an unlisted direct gas-fired
make-up heater and the exhaust system shall be operated to
provide not less than four air changes within the combustion
chamber before the main burners are ignited.
SECTION 611 (IFGC)
DIRECT GAS-FIRED INDUSTRIAL AIR HEATERS
611.1 General. Direct gas-fired industrial air heaters shall be
installed in accordance with the manufacturer's installation
instructions. Listed direct gas-fired industrial air heaters
shall be tested in accordance with ANSI 283.18 or UL 795.
611.2 Prohibited Installations. 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 become toxic when exposed to flame.
Direct gas-fired industrial air heaters shall not be installed in
any area containing sleeping quarters.
611.3 Installation. Listed direct gas-fired industrial air
heaters shall be permitted to be installed in accordance with
their listing and the manufacturer's instructions. Unlisted
direct gas-fired industrial air heaters shall be permitted to be
installed provided that a site-specific equipment evaluation is
performed by an independent testing agency based on the
applicable requirements of ANSI 283.18. Direct gas-fired
industrial air heaters shall be installed only in industrial or
commercial occupancies. Direct gas-fired industrial air
heaters shall be permitted to provide fresh air ventilation.
611.4 Clearance from Combustible Materials. Listed
direct gas-fired industrial air heaters shall be installed with a
clearance from combustible material of not less than that
shown on the label and in the manufacturers' instructions.
Clearances to combustible materials for unlisted direct gasfired industrial air heaters shall be determined during equipment evaluation testing as specified in Section 61 1.3.
611.5 Air Supply. Air to direct gas-fired industrial air
heaters shall be taken from the building, ducted directly from
outdoors, or a combination of both. Direct gas-fired industrial air heaters shall incorporate a means to supply outside ventilation air to the space at a rate of not less than 4 cfm per
1,000 Btu per hour (0.38 m3 per min per kW) of rated input
of the heater. If a separate means is used to supply ventilation
air, an interlock shall be provided so as to lock out the main
burner operation until the mechanical means is verified. If
outside air dampers or closing louvers are used, they shall be
verified to be in the open position prior to main burner operation.
611.6 Atmospheric Vents or Gas Reliefs or Bleeds. Direct
gas-fired industrial air heaters with valve train components
equipped with atmospheric vents gas reliefs or bleeds shall
have their atmospheric vent lines and gas reliefs or bleeds
lead to the outdoors.
Means shall be employed on these lines to prevent water
from entering and to prevent blockage by 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.
611.7 Relief Opening. The design of the installation shall
include adequate provision to permit direct gas-fired industrial air heaters to operate at rated capacity by taking into
account the structure's designed infiltration rate, providing
properly designed relief openings or an interlocked power
exhaust system, or a combination of these methods. The structure's designed infiltration rate and the size of relief openings
shall be determined by approved engineering methods. Relief
openings shall be permitted to be louvers or counterbalanced
gravity dampers. Motorized dampers or closable louvers shall
be permitted to be used, provided they are verified to be in
their full open position prior to main burner operation.
SECTION 612 (IFGC)
CLOTHESDRYERS
612.1 General. Gas-fired clothes dryers shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas clothes dryers shall be tested in accordance with
ANSI 221.5.1 or ANSI 221.5.2.
612.2 Clearance. Unlisted clothes dryers shall be installed
with clearances to combustible material of not less than 18
inches (46 cm). Combustible floors under unlisted clothes
dryers shall be protected in an approved manner.
SECTION 613 (IFGC)
CLOTHESDRYEREXHAUST
613.1 Installation. Clothes dryers shall be exhausted in
accordance with the manufacturer's instructions. Dryer
exhaust systems shall be independent of all other systems and
shall convey the moisture and any products of combustion to
the outside of the building.
613.2 Duct Penetrations. Ducts that exhaust clothes dryers
shall not penetrate or be located within any fireblocking,
draftstopping or any wall, floor/ceiling or other assembly
required by the building code to be fire-resistance rated,
unless such duct is constructed of galvanized steel or aluminum of the thickness specified in Table 603.3 of the
Florida .Building Code, Mechanical and the fire-resistance
rating is maintained in accordance with the Florida Building
Code, Building.
613.3 Cleanout. Each vertical riser shall be provided with a
means for cleanout.
613.4 Exhaust Material. Dryer exhaust ducts for clothes
dryers shall terminate on the outside of the building and shall
be equipped with a backdraft damper. Screens shall not be
installed at the duct termination. Ducts shall not be connected or installed with sheet metal screws or other fasteners that
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will obstruct the flow. Clothes dryer exhaust ducts shall not
be connected to a gas vent connector, gas vent or chimney.
Clothes dryer exhaust ducts shall not extend into or through
ducts or plenums.
613.5 Makeup Air. Installations exhausting more than 200
cfm (0.09 m3/s) shall be provided with makeup air. Where a
closet is designed for the installation of a clothes dryer an
opening having an area of not less than 100 square inches
(0.0645 m2) for makeup air shall be provided in the door, or
makeup air shall be provided by other approved means.
613.6 Domestic Clothes Dryer Ducts. Ducts for domestic
clothes dryers shall have a smooth interior finish with joints
running in the direction of the airflow. The maximum length
shall not exceed 25 feet (7620 mm) from the dryer location
to the discharge terminal. The maximum length of the duct
shall be reduced 2112 feet (762 mm) for each 45-degree (0.79
rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad)
bend. The exhaust duct shall be a minimum nominal size of
4 inches (102 mm) in diameter. The entire exhaust system
shall be supported and secured in place. Flexible duct connectors used in connection with domestic dryer exhausts
shall be metallic, not more than 6 feet (1829 mm) in length
and an approved type. Flexible duct connectors shall not be
concealed within construction.
613.6.1 Rough-in-required. When a compartment or space
for a domestic clothes dryer is provided, an exhaust duct of
approved material and size shall be installed.
613.7 Commercial Clothes Dryers. The installation of
dryer exhaust ducts serving Type 2 clothes dryers shall comply with the appliance manufacturer's installation instructions. Exhaust fan motors installed in exhaust systems shall
be located outside of the airstream. In multiple installations,
the fan shall operate continuously or be interlocked to operate when any individual unit is operating. Ducts shall have a
minimum clearance of 6 inches (152 mm) to combustible
materials.
SECTION 614 (IFGC)
(Reserved)
SECTION 615 (IFGC)
ENGINE AND GAS TURBINEPOWERED EQUIPMENT
615.1 Powered Equipment. Permanently installed equipment powered by internal combustion engines and turbines
shall be installed in accordance with the manufacturer's
installation instructions and in accordance with NFPA 37.
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SECTION 616 (IFGC)
POOL AND SPA HEATERS
616.1 General. Gas-fired pool and spa heaters shall be
installed in accordance with the manufacturer's installation
instructions. Listed gas-fired pool and spa heaters shall be
tested in accordance with ANSI 221.56. An unlisted pool
heater shall be installed with a minimum clearance of 12
inches (30 cm) on all sides and the rear. A combustible floor
under an unlisted pool heater shall be protected in an
approved manner.
SECTION 617 (IFGC)
FORCED-AIR WARM-AIR FURNACES
617.1 General. Gas-fired forced-air warm-air furnaces shall
be installed in accordance with the manufacturer's installation instructions. Listed gas-fired forced-air warm-air furnaces shall be tested in accordance with ANSI 221.47 or UL
795.
617.2 Forced-Air Furnaces. The minimum unobstructed
total area of the outside and return air ducts or openings to a
forced-air warm-air furnace shall be not less than 2 square
inches per 1,000 Btu/h (4403.8 mm2/kW) output rating
capacity of the furnace. The total area of the outside and
return air ducts or openings is not required to be larger than
the minimum indicated by the conditions of listing of the furnace. The minimum unobstructed total area of supply ducts
from a forced-air warm-air furnace shall be not less than 2
square inches for each 1000 Btu/h (4.4 mm 2/W) output rating capacity of the furnace. The total area of the supply air
ducts or openings is not required to be larger than the minimum indicated by the conditions of listing of the furnace.
Forced-air furnaces shall be installed in accordance with the
listings and the manufacturer's installation instructions.
617.3 Dampers. Volume dampers shall not be placed in the
air inlet to a furnace in a manner which will reduce the
required air to the furnace.
617.4 Circulating Air Ducts for Forced-Air Warm-Air
Furnaces. Circulating air for fuel-burning, forced-air-type,
warm-air furnaces shall be conducted into the blower housing from outside the furnace enclosure by continuous airtight ducts.
617.5 Prohibited sources. Outside or return air for a forcedair heating system shall not be taken from the following locations:
1. Closer than 10 feet (3048 mm) from an appliance vent
outlet, a vent opening from a plumbing drainage system or the discharge outlet of an exhaust fan, unless the
outlet is 3 feet (914 mm) above the outside air inlet.
2. Where there is the presence of objectionable odors,
fumes or flammable vapors; or where located less than
10 feet (3048 mm) above the surface of any abutting
public way or driveway; or where located at grade level
by a sidewalk, street, alley or driveway.
3. A hazardous or insanitary location or a refrigeration
machinery room as defined in the mechanical code.
4. A room or space, the volume of which is less than 25
percent of the entire volume served by such system.
Where connected by a permanent opening having an
area sized in accordance with 617.2, adjoining rooms
or spaces shall be considered as a single room or space
for the purpose of determining the volume of such
rooms or spaces.
Exception: The minimum volume requirement shall not
apply where the amount of return air taken from a room or
space is less than or equal to the amount of supply air
delivered to such room or space.
5. A room or space containing an appliance where such a
room or space serves as the sole source of return air.
Exception: This shall not apply where:
1. The appliance is a direct-vent appliance or an
appliance not requiring a vent in accordance
with 501.8.
2. The room or space complies with the following requirements:
2.1. The return air shall be taken from a
room or space having a volume exceeding 1 cubic foot for each 10 Btuh (9.6
UW) of combined input rating of all
fuel-burning appliances therein.
2.2. The volume of supply air discharged
back into the same space shall be
approximately equal to the volume of
return air taken from the space.
2.3. Return-air inlets shall not be located
within 10 feet (3048 mm) of any appliance firebox or draft hood in the same
room or space.
3. Rooms or spaces containing solid-fuel burning
appliances, provided that return-air inlets are
located not less than 10 feet (3048 mm) from
the fire box of such appliances.
6. A closet, bathroom, toilet room, kitchen, garage,
mechanical room. boiler room or furnace room.
617.6 Screen. Required outdoor air inlets for residential portions of a building shall be covered with a screen having 114
inch (6.4 mm) openings. Required outdoor air inlets serving
a nonresidential portion of a building shall be covered with
screen having openings larger than 114 inch (6.4 mm) and not
larger than 1 inch (25 mm).
617.7 Return-Air Limitation. Return air from one dwelling
unit shall not be discharged into another dwelling unit.
SECTION 618 (IFGC)
CONVERSION BURNERS
618.1 Conversion burners. The installation of conversion
burners shall conform to ANSI 221.8.
SECTION 619 (IFGC)
UNIT HEATERS
619.1 General. Gas-fired unit heaters shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas-fired unit heaters shall be tested in accordance
with ANSI 283.8.
619.2 Support.. Suspended-type gas-fired unit heaters shall
be supported by elements that are designed and constructed
to accommodate the weight and dynamic loads. Hangers and
brackets shall be of noncombustible material.
619.3 Ductwork. Ducts shall not be connected to a unit
heater unless the heater is listed for such installation.
619.4 Clearance. Listed suspended-type unit heaters shall
be installed with clearances to combustible materials 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 1inch (25
mm) above the top of the sloping side of the vertical draft
hood. Unlisted suspended-type unit heaters shall be installed
with clearances to combustible materials of not less than 18
inches (457 mm).
Listed floor-mounted-typeunit heaters shall be installed with
clearances to combustible materials at the back and one side
only of not less than 6 inches (152 mm). Where the flue gases
are vented horizontally, the 6 inches (152 mm) clearance
shall be measured from the draft hood of vent instead of the
rear wall of the unit heater. Floor-mounted-type unit heaters
shall not be installed on combustible floors unless listed for
such installafion. Combustible floors under unlisted floormounted-type unit heaters shall be protected in an approved
manner.
Clearances for servicing all unit heaters shall be in accordance with the manufacturer's installation instructions.
Exception: Unit heaters listed for reduced clearance shall
be permitted to be installed with such clearances in accordance with their listing and the manufacturer's instructions.
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SECTION 620 (IFGC)
UNVENTED ROOM HEATERS
620.1 General, Unvented gas-fired room heaters shall be
listed and labeled and shall be installed in accordance with
the conditions of the listing and the manufacturer's installation instructions. Unvented room heaters shall be tested in
accordance with ANSI Z 2 1.11.2.
620.2 hhibited Use. One or more unvented room heaters
shall not be used as the sole source of comfort heating in a
dwelling unit.
6203 Input Rating. Unvented room heaters shall not have
an input rating in excess of 40,000 Btulh (11.7 kW).
620.4 Prohibited Locations. Unvented room heaters shall
not be installed within occupancies in Use Groups A, E and
I. The location of unvented room heaters shall also comply
with Section 303.3.
620.5 Room or Space Volume. The aggregate input rating
of all unvented appliances installed in a room or space shall
not exceed 20 Btulh per cubic foot (0.21 kWIm3) of volume
of such room or space. Where the room or space in which the
equipment is installed is directly connected to another room
or space by a doorway, archway or other opening of comparable size that cannot be closed, the volume of such adjacent
room or space shall be permitted to be included in the calculations.
620.6 Oxygen-Depletion Safety System. Unvented room
heaters shall be equipped with an oxygen-depletion-sensitive
safety shutoff system. The system shall shut off the gas supply to the main and pilot burners when the oxygen in the surrounding atmosphere is depleted to the percent concentration
specified by the manufacturer, but not lower than 18 percent.
The system shall not incorporate field adjustment means
capable of changing the set point at which the system acts to
shut off the gas supply to the room heater.
SECTION 621 (IFGC)
VENTED ROOM HEATERS
621.1 General, Vented gas-fired room heaters shall be
installed in accordance with the manufacturer's installation
instructions. Listed vented gas-fired room heater appliances
shall be tested in accordance with ANSI 22 1.11.1 and comply with Section 602.2.
SECTION 622 (IFGC)
COOKING APPLIANCES
622.1 Cooking Appliances. Gas-fired cooking appliances
that are designed for permanent installation, including
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ranges, ovens, stoves, broilers, grills, fryers, griddles, hot
plates and barbecues, shall be installed in accordance with
the manufacturer's installation instructions. Listed gas-fired
cooking appliances shall be tested in accordance with ANSI
Z21.1,ANSI 221.58. or ANSI 283.11.
622.2 Unlisted Units. Unlisted outdoor cooking appliances
shall be installed outdoors with clearances to combustible
material of not less than 36 inches (91 cm) at the sides and
back and not less than 48 inches (122 cm) at the front. Such
appliances shall not be located under overhead combustible
construction.
622.3 Domestic Ranges Installation. Listed domestic
ranges when installed on combustible floors shall be set on
their own bases or legs and shall be installed with clearances
of not less than that shown on the label.
622.4 Open Top Broiler Units. An exhaust hood shall be
provided above a domestic open top broiler unit, unless otherwise listed for forced down draft ventilation. A minimum
clearance of 24 inches (610 mm) shall be maintained
between the cooking top and combustible material above the
hood. The hood shall be at least as wide as the open top broiler unit and be centered over the unit.
SECTION 623 (IFGC)
WATER HEATERS
623.1 General. Gas-fired water heaters shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas-fired water heaters shall be tested in accordance
with ANSI Z 21.10.1 and ANSI Z 21.10.3.
623.2 Water Heaters Utilized for Space Heating. Water
heaters utilized both to supply potable hot water and provide
hot water for space-heating applications shall be listed and
labeled for such applications by the manufacturer and shall
be installed in accordance with the manufacturer's installation instructions and the Florida Building Code, Plumbing.
623.2.1 Sizing. Water heaters utilized for both potable
water heating and space-heating applications shall be
sized to prevent the space-heating load from diminishing
the required potable water heating capacity.
623.2.2 Scald protection. Where a combination potable
water-heating and space-heating system requires water for
space-heating at temperatures higher than 140°F (60°C). a
tempering valve shall be provided to temper the water
supplied to the potable hot water distribution system to a
temperature of 140°F (60°C) or less.
2
$
623.3 Clearance. Unlisted water heaters shall be installed
with a clearance of not less than 12 inches (30 cm) on all
sides and rear. The required clearances shall not interfere
with the requirements for combustion air and access.
623.63 Materials. Relief valve discharge piping and safety pan drains shall be of those materials listed in Section
606.5 of the Florida Building Code, Plumbing or shall be Itested, rated and approved for such use.
-
623.4 Relief Valve. All storage water heaters operating
above atmospheric pressure shall be provided with an
approved, self-closing (levered) pressure relief valve and
temperature relief valve or combination thereof. The relief
valve shall conform to ANSI 221.22.The relief valve shall
not be used as a means of controlling thermal expansion.
623.7 Required Pan. Where water heaters or hot water storage tanks are installed in locations where leakage of the tanks
or connections will cause damage, the tank or water heater
shall be installed in a galvanized steel pan having a minimum
thickness of 24 gage (0.016inch) (0.4mm) or other pans listed for use.
623.4.1 Installation. Such valves shall be installed in the
shell of the water heater tank. Temperature relief valves
shall be so located in the tank as to be actuated by the
water in the top 6 inches (153 mrn) of the tank served.
There shall not be a check valve or shutoff valve between
a relief valve and the heater or tank served.
623.7.1 Pan Size and Drain The pan shall not be less
than 1112 inches (38 mm) deep and shall be of sufficient
size and shape to receive all dripping or condensate from
the tank or water heater. The pan shall be drained by an
indirect waste pipe having a minimum diameter of 1 inch
(25mm) or the outlet diameter of the required relief valve,
whichever is larger.
623.5 Relief Valve Approval. Temperature and pressure
relief valves. or combinations thereof, shall bear the label of
an approved agency and shall have a temperature setting of
not more than 210°F (99°C) and a pressure setting not
exceeding the tank or water heater manufacturer's rated
working pressure or 150 psi (1035 kPa), whichever is less.
The relieving capacity of each pressure relief valve and each
temperature relief valve shall equal or exceed the heat input
to the water heater or storage tank.
623.6 Relief Outlet Waste. The outlet of a pressure, temperature, or other relief valve shall not be directly connected
to the drainage system.
623.6.1 Discharge. The discharge from the relief valve
shall be piped full-size separately to the outside of the
building or to an indirect waste receptor located inside the
building. In areas subject to freezing, the relief valve shall
discharge through an air gap into an indirect waste receptor located within a heated space, or by other approved
means. The discharge shall be installed in a manner that
does not cause personal injury or property damage and
that is readily observable by the building occupants. The
discharge from a relief valve shall not be trapped. The
diameter of the discharge piping shall not be less than the
diameter of the relief valve outlet. The discharge pipe
shall be installed so as to drain by gravity flow and shall
terminate atmospherically not more than 6 inches (153
mm) above the floor. The end of the discharge pipe shall
not be threaded.
623.6.2 Loeation. In addition to all other requirements, if
the relief outlet discharge piping is installed so that it
leaves the room or enclosure in which the water heater and
relief valve are located and discharges to an indirect waste
receptor, there shall be an air gap installed before or at the
point of leaving the room or enclosure.
623.7.2 Pan Drain Termination. The pan drain shall
extend full-size and terminate over a suitable located indirect waste receptor or floor drain or extend to the exterior
of the building and terminate not less than 6 inches (152
mm) nor more than 24 inches (610mm) above the adjacent ground surface.
SECTION 624 (IFGC)
REFRIGERATORS
624.1 General. Gas-fired refrigerators shall be installed in
accordance with the manufacturer's installation instructions.
Listed gas-fired refrigerators shall be tested in accordance
with ANSI 221.19.
Gas refrigerators shall be provided with adequate clearances
for ventilation at the top and back, and shall be installed in
accordance with the manufacturer's instructions. If such
instructions are not available, at least 2 inches (51 mm) shall
be provided between the back of the refrigerator and the wall
and at least 12 inches (305mm) above the top.
SECTION 625 (IFGC)
GAS-FIRED TOILETS
625.1 General. Gas-fued toilets shall be installed in accordance with the manufacturer's installation instructions.
Listed gas-fired toilets shall be tested in accordance with
ANSI 221.61.
625.2 Clearance. A listed gas-fired toilet shall be installed
in accordance with its listing and the manufacturer's instructions, provided that the clearance shall in any case be sufficient to afford ready access for use, cleanout and necessary
servicing.
FLORIDA BUILDING CODE
-FUEL GAS
SECTION 626 (IFGC)
AIR CONDITIONING EQUIPMENT
626.1 General. Gas-fired air conditioning equipment shall
be installed in accordance with the manufacturer's installation instructions. Listed gas-fired air conditioning equipment
shall be tested in accordance with ANSI 221.40.1 or ANSI
221.40.2.
626.2 Independent gas piping. Gas piping serving heating
gas utilization equipment shall be permitted to also serve
cooling equipment where such heating and cooling equipment cannot be operated simultaneously. (See Section 402)
626.3 Connection of gas engine-powered air conditioners.
To protect against the effects of normal vibration in service,
gas engines shall not be rigidly connected to the gas supply
piping.
626.4 Clearances for indoor installation. Listed air conditioning equipment installed in rooms other than alcoves and
closets shall be installed with clearances not less than those
specified in Line I of Table 633.1(1) except that air conditioning equipment listed for installation at lesser clearances
than those specified in Table 633.1(1), shall be permitted to
be installed in accordance with such listing and the manufacturers' instructions and air conditioning equipment listed for
installation at greater clearances than those specified in Table
633.1(1), shall be installed in accordance with such listing
and the manufacturers' instructions.
Air conditioning equipment installed in rooms other than
alcoves and closets shall be permitted to be installed with
reduced clearances to combustible material, provided that the
combustible material is protected in accordance with Table
308.2.
626.5 Alcove and Closet Installation. Air conditioning
equipment installed in spaces such as alcoves and closets
shall be specifically listed for such installation and installed
in accordance with the terms of such listing. The installation
clearances for air conditioning equipment in alcoves and
closets shall not be reduced by the protection methods
described in Table 308.2.
626.6 Unlisted Equipment Clearance. Unlisted air conditioning equipment shall be installed with clearances from
combustible material of not less than 18 inches (46 cm)
above the equipment and at the sides, front, and rear, and 9
inches (23 cm) from the draft hood.
626.7 Installation. Air conditioning equipment shall be
installed in accordance with the manufacturers' instructions.
Unless the equipment is listed for installation on a combustible surface such as a floor or roof, or unless the surface
FLORIDA BUILDING CODE
-FUEL GAS
is protected in an approved manner, equipment shall be
installed on a surface of noncombustible construction with
noncombustible material and surface finish and with no combustible material against the underside thereof.
626.8 Plenums and Air Ducts. A plenum supplied as a part
of the air conditioning equipment shall be installed in accordance with the equipment manufacturers' instructions. Where
a plenum is not supplied with the equipment, such plenum
shall be installed in accordance with the fabrication and
installation instructions provided by the plenum and equipment manufacturer. The method of connecting supply and
return ducts shall facilitate proper circulation of air.
Where air conditioning equipment is installed within a space
separated from the spaces served by the equipment, the air
circulated by the equipment shall be conveyed by ducts that
are sealed to the casing of the equipment and that separate the
circulating air from the combustion and ventilation air.
626.9 Refrigeration Coils. 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 resistance imposed by the duct system and
cooling coil at the air throughput necessary for heating or
cooling, whichever is greater. Furnaces shall not be located
upstream from cooling units, unless the cooling unit 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 onto the heating element.
626.10 Cooling Units Used with Heating Boilers. 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. Where hot
water heating boilers are connected to heating coils located in
air handling units where they may be exposed to refrigerated
air circulation, such boiler piping systems shall be equipped
with flow control valves or other automatic means to prevent
gravity circulation of the boiler water during the cooling
cycle.
626.11 Switches in Electrical Supply Line. Means for interrupting the electrical supply to the air conditioning equipment 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 m) from
the air conditioner and cooling tower.
SECTION 627 (IFGC)
ILLUMINATING APPLIANCES
627.1 General. Gas-fired illuminating appliances shall be
installed in accordance with the manufacturer's installation
instructions. Listed gas-fired illuminating appliance shall be
tested in accordance with ANSI 221.42.
627.2 Clearances for Unlisted Appliances. 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). 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).
Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustible material not
less than that specified in Table 633.1(2). The distance from
ground level to the base of the burner shall be not less than 7
feet (2 m) where installed within 2 feet (0.6 m) of walkways.
Lesser clearances shall be permitted if acceptable to the code
official.
Unlisted open-flame illuminating appliances installed outdoors shall be equipped with a limiting orifice or other limiting devices, which will maintain a flame height consistent
with the clearance to combustible material, as given in Table
633.1(2).
Appliances designed for flame heights in excess of 30 inches
(76 cm) shall be permitted to be installed if acceptable to the
code official. Such appliances shall be equipped with a safety shutoff device or automatic ignition.
Unlisted open-flame illuminating appliances installed
indoors shall have clearances to combustible materials as
determined by the code official.
627.3 Mounting on Buildings. 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.
627.4 Mounting on Posts. 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 (0.9 m) in height shall be at
least equivalent to that of a 2112-inch (6.4-cm) diameter post
constructed of 0.064-inch (1.6-mm) thick steel or a 1-inch
Schedule 40 steel pipe. Posts 3 feet (0.9 m) or less in height
shall not be smaller than a 314-inch (19 mm) Schedule 40 steel
pipe. Drain openings shall be provided near the base of posts
where there is a possibility of water collecting inside them.
627.5 Gas Appliance Pressure Regulators. Where a gas
appliance pressure regulator is not supplied with an illurninating appliance and the service line is not equipped with a service pressure regulator, an appliance pressure regulator shall
be installed in the line to the illuminating appliance. For multiple installations, one regulator of adequate capacity shall be
permitted to serve more than one illuminating appliance.
SECTION 628 (IFGC)
SMALL CERAMIC KILNS
628.1 General. Gas-fired ceramic kilns with a maximum
interior volume of 20 cubic feet (0.566 m3) and used for
hobby and non commercial purposes shall be installed in
accordance with the manufacturer's installation instructions
and the provisions of this code.
SECTION 629 (IFGC)
INFRARED RADIANT HEATERS
629.1 General. Gas-fired infrared radiant heaters shall be
installed in accordance with the manufacturer's installation
instructions. Listed gas-fired infrared radiant heaters shall be
tested in accordance with ANSI Z 83.6.
629.2 Support. Infrared radiant heaters shall be safely and
adequately fixed in an approved position independent of gas
and electric supply lines. Hanger and brackets shall be of
noncombustible material.
SECTION 630 (IFGC)
LISTED BOILERS
630.1 Standards. Listed boilers and their control systems
shall be designed and constructed in accordance with the
requirements of one or more of the following standards:
ANSI 221.13, ASME Boiler and Pressure Vessel Code
Sections I, 11, IV, V and IX;ASME CSD-1, NFPA 8501,
NFPA 8502, NFPA 8504, UL 726, UL 795 or UL 834.
630.2 Installation. In addition to the requirements of this
code, the installation of boilers shall be in accordance with
the manufacturer's instructions and the mechanical code.
Operating instructions of a permanent type shall be attached
to the boiler. Boilers shall have all controls set, adjusted and
tested by the installer. A complete control diagram together
with complete boiler operating instructions shall be furnished
by the installer. The manufacturer's rating data and the nameplate shall be attached to the boiler.
6303 Clearance to Combustible Materials. Clearances to
combustible materials shall be in accordance with Table
633.1(1).
FLORIDA BUILDING CODE
-FUEL GAS
SECTION 631 (IFGC)
GAS EQUIPMENT INSTALLED IN EXISTING
UNLISTED BOILERS
Z- 631.1 General. Gas equipment installed in existing unlisted
- boilers shall comply with 630.1 and shall be installed in
i
with the manufacturer's instructions, the Florida
-E accordance
Building Code, Mechanical and the provisions of this sec; tion.
631.2 Scope. The requirements of this section apply to the
installation of gas equipment in unlisted boilers having an
input over 400,000 Btu per hour (11.7 kW), having a working pressure of not over 15 psi (103 kPa), and which furnish
steam, hot water, or both for heating and water heating.
* 631.3 Combustion air.
631.8 Operating Stops. Adjustable (modulating) dampers,
where used for fuel-air ratio-control, shall be equipped with
suitably located maximum and minimum operating stops.
The minimum operating stops for such dampers shall be
located to assure combustion of the gas at the minimum burner input. These dampers shall be counterbalanced to open in
the event of breakage or failure of their operating means.
631.9 Burner Installation. Burners and their component
parts shall be properly installed and firmly secured in accordance with the burner manufacturer's instructions. The burners shall be installed in such a manner as to permit their withdrawal for repairs or alterations without disturbing the furnace walls or settings. The weight of the walls shall not rest
on horizontal burners.
Properly designed permanent facilities for supplying an ample amount of outside air to assure
combustion of the gas shall be provided. Where combustion
air is taken from the space in which the boiler is located and
manufacturer's instructions are not available, an opening to
the outdoors shall be provided having a net free area of not
less than 0.75 sq ft for each 1,000,000 Btu per hour (238
mm2/kW) of total burner input, or an opening area equivalent to the total area of the stack or stacks that are being used,
whichever is greater. The above provisions only apply to
boilers in which the products of combustion are undiluted in
the flue or vent connector. Where draft diverters, check
drafts, fixed check openings, barometric dampers or a boiler
room ventilating system are used, additional openings shall
be provided for adequate air infiltration without affecting the
combustion in the firebox.
631.10 Combustion Stability. The gas shall be burned in
such a manner throughout the range of turndown so there will
be no puffing, vibration, flame lifting, backfiring or injurious
flame impingement on walls or heating surfaces in a manner
that will cause damage to the boiler parts. Burners shall also
maintain stable combustion at the minimum rate of firing or
during any sudden change in the gas-firing rate between
maximum and minimum rates.
631.4 Ventilation. Adequate ventilation of the boiler room
shall be provided. The ventilation system shall not adversely
affect the combustion of gas in the boiler.
631.12 Draft. For manually or automatically controlled boilers having forced or induced draft fan or both, means shall be
provided to maintain safe combustion or to shut off the gas in
case of draft failure for any cause. Forced or induced draft
installations shall be provided with a mechanical timer to
provide a 5-minute purge period prior to pilot ignition after
shut down. The purge period is permitted to be reduced provided that sufficient time is assured to provide for complete
purging of the firebox and flue passages prior to pilot ignition
after shut down. A spark or ignition shall not be allowed to
occur in the firebox during the purging cycle.
631.5 Chimney or Vent Size. Boilers shall be properly and
firmly connected to a chimney or vent of ample size to convey the flue gases. Vent connectors shall not be smaller than
the outlet on the boiler.
631.6 Draft Limits. Means for limiting draft shall be
installed on each boiler. Where a manually operated damper
is used in a normally stationary position to limit chimney
draft, positive means shall be provided to lock the damper in
position. The manually operated damper shall be installed
between the boiler and any application of automatic or modulating draft limiting devices.
631.7 Damper Interlock. Where an automatically controlled or modulating damper is used with the burner control
assembly, such damper shall be interlocked with the burner
input control valve to prevent lighting of the burner when the
damper is not open.
FLORIDA BUILDING CODE
- FUEL GAS
631.11 Air Intakes. Air openings into the combustion chamber or fire box shall be provided with sufficient area to supply an adequate amount of air for combustion under the actual draft conditions existing at the maximum rate of firing.
The air shall be introduced in a manner so as to obtain thorough mixing of the gas and air in order to assure combustion
within the space provided.
631.13 Burner Ignition. Burners shall be provided with
ignition means in accordance with Sections 631.13.1 through
631.13.7.
631.13.1. Pilots. An adequate gas pilot or pilots shall be
used to assure positive ignition of the burner or burners.
631.132 Shutoff Device. A safety shutoff device or
flame safeguard so constructed and installed that no gas
can flow to the main burner or burner group unless satis-
factory ignition is assured, shall be employed at each
burner or group of burners operating as a unit, for all automatically controlled boilers. Gas to main burners and to
intermittent or ignition pilots shall be automatically shut
off in case of flame failure at the point of supervision. The
response time of the flame safeguard to de-energize the
safety shutoff device on flame failure Shall not exceed 5
seconds for unlisted boilers having inputs in excess of
400.000 Btu per hour (11.7 kW). Pilot supervision by such
safety shutoff device shall be only at the point where the
flame will effectively ignite the gas at the main burner or
burners.
631.13.3 Electric Ignition. Electric ignition systems
shall ignite only a pilot. The input to the pilot shall not
exceed 3% of the maximum input to the main burner as
fired. If ignition of the pilot is not obtained within 15 seconds, the gas shall shut off automatically.
631.13.4 Support. All pilot burners and safety shutoff
devices shall be supported in such a manner that their
position relative to each other and to the flame of the main
burner or burners will remain fixed. Means shall be provided to permit ready observation of such components
while firing. Wiring or controls shall not be subjected to
heat from the burners unless specifically designed to withstand such temperatures.
631.13.5 Access. Pilot burners and safety shutoff devices
shall be provided with ready access and shall be removable for servicing. Pilot burners shall be placed so that
they can be safely lighted manually, if required. Where
push button controls are used for manually opening pilot
solenoid valves such controls shall be installed so that one
operator can light the pilot and operate the push button
simultaneously.
631.13.6 Pressure Regulator. For automatically controlled boilers, the gas supply pressure to the pilot or
group of pilots shall be regulated independently of the
main burner supply by gas pressure regulators in the pilot
supply line.
631.13.7 Connection. Pilot lines shall be connected to
vertical main gas supply pipes or to the sides or top of horizontal lines upstream from all gas control valves, and
they shall be independently controlled by a manually
operated pilot shutoff valve. For installations requiring
more than one pilot, a manually operated shutoff valve
shall be provided for each pilot.
631.14 Control Valves. Boilers shall be provided with fuel
control valves in accordance with Section 631.14.1 through
613.14.6.
631.14.1 Manual Shutoff Valves. Each boiler burner
assembly shall have a lubricated plug type shutoff valve
with handle permanently attached which will shut off the
gas to the burner and control valve assembly.
631.143 Individual Burner Valves. Where the fving
rate of the burner is controlled manually, each burner shall
have a separate firing valve designed for the maximum
operating gas pressure on the burner.
631.14.3 Location. Boiler input control valves and safety shutoff valve shall be installed downstream from the
shutoff valves described in 631.14.1.
631.14.4 By-pass Valves. Where a by-pass is installed
around a throttling type burner input control valve, a separate safety shutoff valve shall be installed to shut off the
gas supply when the limit or protective controls are actuated.
631.14.5 Safety Shutoff Valves. Electrically operated
safety shutoff valves shall not depend on electricity to shut
off the gas supply.
631.14.6 Control Venting Vents from control valves
actuated by gas pressure shall be piped into the fmbox
adjacent to a constant burning pilot or to a safe point outside the building. Iron or steel pipe or tubing shall be used
for venting such valves.
631.15 Gas Pressure Regulators. Where the gas supply
pressure to the burner is higher than that at which the burners
normally operate on a particular installation, a gas pressure
regulator shall be used. Regulators shall be of the spring
loaded, dead weight or pressure balanced type and they shall
maintain a gas pressure within 10% of the operating pressure
from maximum to minimum firing rates. The weight and
lever type of regulator shall not be used. The pressure regulators shall be vented into the furnace adjacent to a constant
burning pilot, or into the stack above the damper as far
removed from the burner as possible, or to a safe point on the
outside of the building. Iron or steel pipe or tubing shall be
used for venting such regulators.
631.16 Indicating Pressure Gage Connections. A suitable
connection shall be provided for attaching a gage to indicate
the gas pressure on the burner.
631.17 Limiting Devices. Automatically controlled burner
boilers shall be equipped with safety devices arranged to pre'vent excessive pressures or temperatures by shutting off the
gas. Low water cutoffs shall be used on all automatically
controlled steam boilers.
FLORIDA BUILDING CODE
-FUEL GAS
SECTION 632 (IFGS)
CHIMNEY DAMPER OPENING AREA
632.1 Free OpeningArea of Chimney Dampers. Where an
unlisted decorative appliance for installation in a vented fire-.
place is installed, the fireplace damper shall have a permanent free opening equal to or greater than specified in Table
632.1
TABLE 632.1
FREE OPENING AREA OF CHIMNEY DAMPER FOR VENTlNQ FLUE QASES
FROM UNLISTED DECORATIVEAPPLIANCES FOR INSTALLATION IN VENTED FIREPLACES
For SI units: 1 foot = 0.305 m; 1 inch2 = 6.45 cm2; 1000 Btu per hour = 0.293 kW.
*
The first six minimum pennanent free openings (8 to 51 square inch) correspond approximately to the cross-sectional areas
of chimneys having diameters of 3 through 8 inches, respectively. The 64-sq in. opening corresponds to the cross-sectional
area of standard 8 inch x 8 inch chimney tile.
SECTION 633 (IFGS)
CLEARANCES TO COMBUSTIBLE MATERIAL
633.1 Clearances. Clearances to combustible material for
air conditioning equipment, boilers, and unlisted outdoor
open-flame illuminating appliances shall be in accordance
with Tables 633.1(1), and 633.1(2)
FLORIDA BUILDING CODE
-FUEL GAS
TABLE 633.1(1) -TABLE 633.1(2)
TABLE 633.1(1)
AIR CONDmONlNG EQUIPMENTAND BOILERS
Jacket
Sides
and
Rear
Above and
Sldes of
Plenum
I. Listed automatically fired. forced air
or gravity system, with 250°F temperature
limit control.
11. Unlisted automatically fired, forced air or
gravity system, equipped with temperature
limit control which cannot be set higher
than 250°F.
Ill. Listed Automatically Fired Heating
Boilers Steam boilen operating at not
over 15 psi gauge pressure and hot water
boilers operating at not in excess of 250°F.
IV. Unlisted Automatically P i Heating
Boilers Steam boilers operating at not
over 15 psi gauge pressure and hot water
boilers operating at not in excess of 2S0°E
V. Central heating boilers and furnaces, other
than above.
MINIMUM CLEARANCE (INCHES)
Draft Hood
Barometric
Draft and
Front
Regulator
(See Note 1)
Vent
Connector
(See Note 2)
2
18
6
6
(See Notes
3 and 4)
6
6
(See Note 5)
6
-
6
(See Note 7)
6
18
6
6
(See Note 10)
-
6
(See Note 7)
6
18
18
(See Note 6)
18
(See Note 6)
18
(See Note 8)
18
18
18
18
(See Note 6)
(See Note 10)
18
18
(See Note 6)
(Sec Note 6)
18
(See Note 6)
For SI units: 1 inch = 2.54 cm; 250°F = 121°C
NOTES APPLICABLE TO TABLE a3.1(1)
1. Front clearance shall be sufficient for servicing the burner and furnace or boiler.
2. The vent connector clearance does not apply to listed Type B gas vents.
3. 'Ihis clearance may be reduced to 1 inch (2.5 cm) for a listed forced air or gravity furnace equipped with:
(a) A limit m m l that cannot be set higher than 2W°F (93.3'0. or
(b) A marking to indicate that the outlet air temperature cannot exceed 2 W F (93.3"C).
4. Clearance from supply ducts within 3 feet (0.9 m) of the plenum shall not be less than that specified from the plenum. No c l m m ~ c is
c l~cessarybeyard
this distance.
5. Clearance from supply ducts within 6 feet (1.8 m) of the plenum shall not be less tban 6 ioches (15 cm). No clearance is necessary beyond this distana.
6. For unlisted gas utilization equipment equipped with an approved draft hood, this clearance may be reduced to 9 inches (23 cm).
7. This clearance is above top of boiler.
8. Clearance from supply ducts shall not be less than 18 inches (46 cm) out to 3 feet (0.9 m) from the plenum, not less than 6 inches (15 cm) from 3 feet
to 6 feet (0.9 m to 1.8 m), and not less than 1 inch (2.5 cm) beyond 6 feet (1.8 m).
9. Rooms that are large in comparison with the size of the equipment are rooms having a volume equal to at least 12 times the total volume of an air cmditioning appliance or furnace and at least 16 times the total volume of a boiler or water heater. Total volume of an appliance is determined from exterior dimensions and is to include fan compartments and burner vestibules, where used. Where the actual ceiling height of a room is greater than 8 feet
(2.4 m), the volume of a room shall be figured on the basis of a ceiling height of 8 feet (2.4 m).
10. These clearances shall apply unless the listing of an appliaoce specifies different clearances, in which case the listed clearances shall apply.
TABLE 633.1(2)
CLEARANCES FOR UNLISTED OUTDOOR OPEN-FLAME
ILLUMINATING APPLIANCES
I
Flame Heiaht
Above ~ u m e r
Head (Inches)
--
1
Minimum Clearance from
Combustible Material (Feet).
Horizontal
Vertlcal
I
1
L
For SI units: 1 inch = 2.54 cm; 1 foot = 0.305 m.
Measured from the nearest portion of the burner head.
*
FLORIDA BUILDING CODE
-FUEL aAS