CHAPTER SPECIFIC APPLIANCES SECTION 01 (IFGC) GENERAL 01.1 Scope. This chapter shall govern the approval, design, installation, construction, maintenance, alteration and repair of the appliances and equipment specifically identified herein. SECTION 02 (IFGC) DECORATIVE GAS-FIRED APPLIANCES FOR INSTALLATION IN FIREPLACES 02.1 General. Decorative gas-fired appliances for installation in approved solid fuel burning fireplaces shall be instructions. Listed decorative gas-fired appliances for installation in an approved solid fuel burning fireplace shall be tested in accordance with ANSI 221.0. Manually lighted natural gas decorative gas appliances shall be tested in accordance with an approved method. 02.2 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. 02.3 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 32. 02.4 Shutoff Valves. Shutoff valves located in the firebox of a fireplace shall be installed in accordance with the decorative appliance manufacturer's instructions. 02.5 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 03 (IFGC) GAS-FIRED LOG LIGHTERS 03.1 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 04 (IFGC) VENTED GAS-FIRED DECORATIVE APPLIANCES 04.1 General. Vented gas-fired decorative appliances shall be 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 02.2. 04.2 Prohibited Installations. Unlisted vented decorative appliances shall not be installed in bathrooms or bedrooms. 04.3 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 inches (4 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. Exception: Appliances that make use of metal or ceramic material to direct radiation to the front of the appliance shall have a clearance of 3 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 inches (4 cm) at the sides and 12 inches (30 cm) at the rear. 04.3.1 Access. Panels, grilles, and access doors that are required to be removed for normal servicing operations shall not be attached to the building. SECTION 05 (IFGC) INCINERATORS AND CREMATORIES 05.1 General. Incinerators and crematories shall be instructions.
SECTION 0 (IFGC) COMMERCIAL-INDUSTRIAL INCINERATORS 0.1 Incinerators, Commercial-Industrial. Commercialindustrial type incinerators shall be constructed and installed in accordance with NFPA 82. SECTION 07 (IFGC) VENTED WALL FURNACES 07.1 General. Gas-fired vented wall furnaces shall be instructions. Listed gas-fired vented wall furnaces shall be tested in accordance with ANSI 221.49. 07.2 Venting. Vented wall furnaces shall be vented in accordance with Section 503. 07.3 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. 07.4 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. 07.5 Ducts Prohibited. Ducts shall not be attached to wall furnaces. Casing extension boots shall not be installed unless listed as part of the appliance. 07. 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 08 (IFGC) FLOOR FURNACES 08.1 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. 08.2 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 inches (15 cm) to the nearest wall. A distance of at least inches (4 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 inches (15 cm) to a wall. Wall-register models shall not be placed closer than 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. 08.3 Bracing. The floor around the furnace shall be braced and headed with a support framework designed in accordance with the Florida Building Code, Building. - 08.4 Clearance. The lowest portion of the floor furnace shall have not less than a -inch (152 mm) clearance from the grade level; except where the lower -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 -inch (457 nun) minimum clearance. 08.5 First Floor Installation. Listed floor furnaces installed in the first or ground floor of buildings shall be enclosed as specified in Section 08. and shall project into a nonhabitable space if the basements of these buildings have been converted to apartments or sleeping quarters. 08. 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 sep 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 inches (15 cm) to all sides and bottom, and with the enclosure constructed of noncombustible material. C -
SECTION 09 (IFGC) DUCT FURNACES 09.1 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. 09.2 Clearances. Unlisted duct furnaces shall be installed with clearances to combustible materials as specified for unlisted furnaces and boilers in Section 33. 09.3 Access Panels. Ducts connected to duct furnaces shall have removable access panels on both the upstream and downstream sides of the furnace. 09.4 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. 09.5 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 10 (IFGC) DIRECT GAS-FIRED MAKE-UP AIR HEATERS 10.1 General. Direct gas-fired make-up air heaters shall be instructions. Listed direct gas-fired make-up air heaters shall be tested in accordance with ANSI 283.4. 10.2 Installation. Direct gas-fired make-up air heaters shall not be used to supply any area containing sleeping quarters. 10.3 Clearance from Combustible Material. Unlisted direct gas-fired make-up air heaters shall be installed with clearances to combustible.materia1 of not less than inches (4 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. 10.4 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. 10.5 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. 10. 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 (OC). 10.7 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. 10.8 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. 10.9 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. 10.10 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 11 (IFGC) DIRECT GAS-FIRED INDUSTRIAL AIR HEATERS 11.1 General. Direct gas-fired industrial air heaters shall be instructions. Listed direct gas-fired industrial air heaters shall be tested in accordance with ANSI 283. or UL 795. 11.2 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. 11.3 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.. 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. 11.4 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 1 1.3. 11.5 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. 11. 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. 11.7 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 1 2 (IFGC) CLOTHESDRYERS 12.1 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. 12.2 Clearance. Unlisted clothes dryers shall be installed with clearances to combustible material of not less than inches (4 cm). Combustible floors under unlisted clothes dryers shall be protected in an approved manner. SECTION 1 3 (IFGC) CLOTHESDRYEREXHAUST 13.1 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. 13.2 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 03.3 of the Florida.Building Code, Mechanical and the fire-resistance rating is maintained in accordance with the Florida Building Code, Building. 13.3 Cleanout. Each vertical riser shall be provided with a means for cleanout. 13.4 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
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. 13.5 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 (0.045 m2) for makeup air shall be provided in the door, or makeup air shall be provided by other approved means. 13. 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 (720 mm) from the dryer location to the discharge terminal. The maximum length of the duct shall be reduced 2112 feet (72 mm) for each 45-degree (0.79 rad) bend and 5 feet (1524 mm) for each 90-degree (1. 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 feet (29 mm) in length and an approved type. Flexible duct connectors shall not be concealed within construction. 13..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. 13.7 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 inches (152 mm) to combustible materials. SECTION 14 (IFGC) (Reserved) SECTION 15 (IFGC) ENGINE AND GAS TURBINE- POWERED EQUIPMENT 15.1 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. SECTION 1 (IFGC) POOL AND SPA HEATERS 1.1 General. Gas-fired pool and spa heaters shall be instructions. Listed gas-fired pool and spa heaters shall be tested in accordance with ANSI 221.5. 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 17 (IFGC) FORCED-AIR WARM-AIR FURNACES 17.1 General. Gas-fired forced-air warm-air furnaces shall be instructions. Listed gas-fired forced-air warm-air furnaces shall be tested in accordance with ANSI 221.47 or UL 795. 17.2 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. 17.3 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. 17.4 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. 17.5 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 17.2, 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. 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.. A closet, bathroom, toilet room, kitchen, garage, mechanical room. boiler room or furnace room. 17. Screen. Required outdoor air inlets for residential portions of a building shall be covered with a screen having 114 inch (.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 (.4 mm) and not larger than 1 inch (25 mm). 17.7 Return-Air Limitation. Return air from one dwelling unit shall not be discharged into another dwelling unit. SECTION (IFGC) CONVERSION BURNERS.1 Conversion burners. The installation of conversion burners shall conform to ANSI 221.8. SECTION 19 (IFGC) UNIT HEATERS 19.1 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. 19.2 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. 19.3 Ductwork. Ducts shall not be connected to a unit - heater unless the heater is listed for such installation. - 19.4 Clearance. Listed suspended-type unit heaters shall be installed with clearances to combustible materials of not less than inches (457 mm) at the sides, 12 inches (305 mm) at the bottom and inches (152 mm) above the top where the unit heater has an internal draft hood or 1 inch (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 inches (457 mm). Listed floor-mounted-type unit heaters shall be installed with clearances to combustible materials at the back and one side only of not less than inches (152 mm). Where the flue gases are vented horizontally, the 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.
SECTION 20 (IFGC) UNVENTED ROOM HEATERS 20.1 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. 20.2 hhibited Use. One or more unvented room heaters shall not be used as the sole source of comfort heating in a dwelling unit. 203 Input Rating. Unvented room heaters shall not have an input rating in excess of 40,000 Btulh (11.7 kw). 20.4 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. 20.5 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. 20. 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 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 21 (IFGC) VENTED ROOM HEATERS 21.1 General, Vented gas-fired room heaters shall be instructions. Listed vented gas-fired room heater appliances shall be tested in accordance with ANSI 22 1.11.1 and comply with Section 02.2. SECTION 22 (IFGC) COOKING APPLIANCES 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. 22.2 Unlisted Units. Unlisted outdoor cooking appliances shall be installed outdoors with clearances to combustible material of not less than 3 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. 22.3 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. 22.4 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 (10 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 23 (IFGC) WATER HEATERS 23.1 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. 23.2 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 installa- 2 tion instructions and the Florida Building Code, Plumbing. $ 23.2.1 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. 23.2.2 Scald protection. Where a combination potable water-heating and space-heating system requires water for space-heating at temperatures higher than 140 F (0 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 (0 C) or less. 22.1 Cooking Appliances. Gas-fired cooking appliances that are designed for permanent installation, including
23.3 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. 23.4 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. 23.4.1 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 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. 23.5 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. 23. Relief Outlet Waste. The outlet of a pressure, temperature, or other relief valve shall not be directly connected to the drainage system. 23..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 inches (153 mm) above the floor. The end of the discharge pipe shall not be threaded. 23..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. 23.3 Materials. Relief valve discharge piping and safety pan drains shall be of those materials listed in Section 0.5 of the Florida Building Code, Plumbing or shall be I - tested, rated and approved for such use. 23.7 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 (0.01 inch) (0.4 mm) or other pans listed for use. 23.7.1 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 (25 mm) or the outlet diameter of the required relief valve, whichever is larger. 23.7.2 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 inches (152 mm) nor more than 24 inches (10 mm) above the adjacent ground surface. SECTION 24 (IFGC) REFRIGERATORS 24.1 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 (5 1 mm) shall be provided between the back of the refrigerator and the wall and at least 12 inches (305 mm) above the top. SECTION 25 (IFGC) GAS-FIRED TOILETS 25.1 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 221.1. 25.2 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.
SECTION 2 (IFGC) AIR CONDITIONING EQUIPMENT 2.1 General. Gas-fired air conditioning equipment shall be instructions. Listed gas-fired air conditioning equipment shall be tested in accordance with ANSI 221.40.1 or ANSI 221.40.2. 2.2 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) 2.3 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. 2.4 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 33.1(1) except that air conditioning equipment listed for installation at lesser clearances than those specified in Table 33.1(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 33.1(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. 2.5 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. 2. Unlisted Equipment Clearance. Unlisted air conditioning equipment shall be installed with clearances from combustible material of not less than inches (4 cm) above the equipment and at the sides, front, and rear, and 9 inches (23 cm) from the draft hood. 2.7 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 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. 2.8 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. 2.9 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. 2.10 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. 2.11 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 27 (IFGC) ILLUMINATING APPLIANCES 27.1 General. Gas-fired illuminating appliances shall be instructions. Listed gas-fired illuminating appliance shall be tested in accordance with ANSI 221.42. 27.2 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 inches (457 mm). Unlisted open-flame illuminating appliances installed outdoors shall have clearances from combustible material not less than that specified in Table 33.1(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. 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 33.1(2). Appliances designed for flame heights in excess of 30 inches (7 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. 27.3 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. 27.4 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 (.4-cm) diameter post constructed of 0.04-inch (1.-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. 27.5 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 28 (IFGC) SMALL CERAMIC KILNS 28.1 General. Gas-fired ceramic kilns with a maximum interior volume of 20 cubic feet (0.5 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 29 (IFGC) INFRARED RADIANT HEATERS 29.1 General. Gas-fired infrared radiant heaters shall be instructions. Listed gas-fired infrared radiant heaters shall be tested in accordance with ANSI Z 83.. 29.2 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 30 (IFGC) LISTED BOILERS 30.1 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 72, UL 795 or UL 834. 30.2 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. 303 Clearance to Combustible Materials. Clearances to combustible materials shall be in accordance with Table 33.1(1).
- SECTION 31 (IFGC) GAS EQUIPMENT INSTALLED IN EXISTING UNLISTED BOILERS Z 31.1 General. Gas equipment installed in existing unlisted i boilers shall comply with 30.1 and shall be installed in - accordance with the manufacturer's instructions, the Florida E Building Code, Mechanical and the provisions of this sec- ; tion. 31.2 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. * 31.3 Combustion air. 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. 31.4 Ventilation. Adequate ventilation of the boiler room shall be provided. The ventilation system shall not adversely affect the combustion of gas in the boiler. 31.5 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. 31. 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. 31.7 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. 31.8 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. 31.9 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. 31.10 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. 31.11 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. 31.12 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. 31.13 Burner Ignition. Burners shall be provided with ignition means in accordance with Sections 3 1.13.1 through 31.13.7. 31.13.1. Pilots. An adequate gas pilot or pilots shall be used to assure positive ignition of the burner or burners. 31.132 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 (1 1.7 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. 31.13.3 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. 31.13.4 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. 31.13.5 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. 31.13. 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. 31.13.7 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. 31.14 Control Valves. Boilers shall be provided with fuel control valves in accordance with Section 3 1.14.1 through 13.14.. 31.14.1 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. 31.143 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. 31.14.3 Location. Boiler input control valves and safety shutoff valve shall be installed downstream from the shutoff valves described in 3 1.14.1. 31.14.4 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. 31.14.5 Safety Shutoff Valves. Electrically operated safety shutoff valves shall not depend on electricity to shut off the gas supply. 31.14. 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. 31.15 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. 31.1 Indicating Pressure Gage Connections. A suitable connection shall be provided for attaching a gage to indicate the gas pressure on the burner. 31.17 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.