GENERAL:  Wherever the following references are used, they shall be replaced with FL specific reference:
International Energy Conservation Code
International Building Code
International Fuel Gas Code
ICC Electrical Code
International Plumbing Code
International Fire Code	

Chapter 13 of the Florida Building Code, Building
Florida Building Code, Building
Florida Building Code, Fuel Gas
Chapter 27 of the Florida Building Code, Building
Florida Building Code, Plumbing
Florida Fire Prevention Code		
Chapter 1. ADMINISTRATION.  Delete and refer to Chap. 1 of the FBC-B.	Chapter 1. ADMINISTRATION.  Deleted and referred to Chap. 1 of the FBC-B.	Delete chapter.
Ref FBC-B Ch1	
Chapter 2 DEFINITIONSs	Chapter 2 DEFINITIONS		
	AEROSOL SEALANT. A closure product for duct and plenum systems, which is delivered internally to leak sites as aerosol particles using a pressurized air stream.

ADDITION. An extension or increase in conditioned floor area or height of a building or structure. (Reference Chapter 13, - §13-101.1.2 and §13-101.2.2 of the Florida Building Code, Building).

AIR BARRIER. Relating to air distribution systems, a material object(s) which impedes or restricts the free movement of air under specified conditions. For fibrous glass duct, the air barrier is its foil cladding; for flexible non-metal duct, the air barrier is the non-porous core; and for sheet metal duct and air handling units, the air barrier is the metal in contact with the air stream. For mechanical closets, the air barrier may be a uniform panelized material such as gypsum wall board which meets ASTM C36, or it may be a membrane which alone acts as an air barrier which is attached to a panel, such as the foil cladding of fibrous glass duct board.
Relating to the building envelope, air barriers comprise the planes of primary resistance to air flow between the interior spaces of a building and the outdoors and the planes of primary air flow resistance between adjacent air zones of a building, including planes between adjacent conditioned and unconditioned air spaces of a building. To be classed as an air barrier, a building plane must be substantially leak free; that is, it shall have an air leakage rate not greater than 0.5 cfm/ft^2 when subjected to an air pressure gradient of 25 pascal. In general, air barriers are made of durable, non-porous materials and are sealed to adjoining wall, ceiling or floor surfaces with a suitable long-life mastic. House wraps and taped and sealed drywall may constitute an air barrier but dropped acoustical tile ceilings (T-bar ceilings) may not. Batt insulation facings and asphalt-impregnated fiberboard and felt paper are not considered air barriers.

	The TAC voted to delete “aerosol sealant” at the 1/12/04 meeting.

Bring forward all FL-specific definitions.
These definitions should be compared to those changed in the energy code and reflect those changes.  AS	

	AIR CONDITIONING. The process of treating air to control its temperature, humidity, cleanliness and distribution to meet requirements of the conditioned space.

AIR DIILUTION. The air that enters the relief opening of a draft hood or draft diverter, or the air that enters another opening in an appliance flue or venting system.

AIR DISTRIBUTION SYSTEM. Include all building elements (duct systems, air handling units, cavities of the building structure and mechanical closets) through which air is delivered to or from the conditioned spaces.

AIR-HANDLING UNIT. The fan unit of a furnace and the fan-coil unit of a split-system, packaged air conditioner or heat pump.

AIR POROSITY. The ability to transmit air through minute openings in a substance or material.

APPLIANCE, VENTED. An appliance designed and installed in such a manner that all of the products of combustion are conveyed directly from the appliance to the outside atmosphere through an approved chimney or vent system.

ATTIC. An enclosed unconditioned space located immediately below an uninsulated roof and immediately above the ceiling of a building. For the roof to be considered insulated, roof insulation shall be at least the R-value required to meet §13-404.2.B.1 or §13-604.1.ABC.1 of Chapter 13 of the FBC-Building 

BOILER, HOT WATERSUPPLY. Any vessel used for generating hot water to be used external to the vessel, which exceeds any of the following limitations:
1. A heat input capacity of 200,000 Btuh (58.6 kW).
2. A water temperature of 200ºF (93ºC).
3. A nominal water capacity of 120 gal (454 L).

BUILDING. Any structure that includes provision for any of the following or any combination of the following: a space heating system, a space cooling system, or a service water heating system. For the purpose of this code each portion of a building separated from other portions by a rated fire wall shall be considered as a separate building. The term "building" shall be construed as if followed by the words "or part thereof."

CONDITIONED SPACE. That volume of a structure which is either mechanically heated, cooled, or both heated and cooled by direct means. Spaces within the thermal envelope that are not directly conditioned shall be considered buffered unconditioned space. Such spaces may include, but are not limited to, mechanical rooms, stairwells, and unducted spaces beneath roofs and between floors. Air leakage into dropped ceiling cavities does not constitute conditioned space. 		

	DRAWBAND. A fastener  which surrounds and fastens a duct fitting with either the inner lining or the outer jacket of flexible ducts. Tension ties, clinch bands, draw ties, and straps are considered drawbands.

DUCT FITTING. Couplings that join sections of ducting together or to other air distribution system components. When used to join sections of flexible non-metal duct, duct fittings are typically metal or other rigid material and have a raised bead or indented groove against which the drawband is secured. Terminal fittings join ducting to supply outlets and return inlets at the end of the distribution system and include register and return boots and register and return boxes. Intermediate fittings join flexible non-metal duct to other sections of flexible non-metal duct, to sections of other types of ducting, and to mechanical equipment and include collars, take-offs, tap-ins, sleeves, and the supply and return ends of air handlers and furnaces. (See also “INTEGRAL FLANGE DUCT COLLAR FITTING”)

ENCLOSED SUPPORT PLATFORM. A framed enclosure located inside or outside the conditioned space, which supports a furnace or central heating/air conditioning air handler and which may contain and protect a return duct section of the air distribution system.

EQUIPMENT, EXISTING. Any equipment regulated by this code which was legally installed prior to the effective date of this code, or for which a permit to install has been issued. (Reference Chapter 13, - §13-101.1.6 of the Florida Building Code, Building).

EXISTING BUILDING. A building or portion therof that was previously occupied or approved for occupancy by the authority having jurisdiction. A completed building for which a certificate of occupancy, or equivalent approval for occupancy, has been issued. (Reference Chapter 13, - §13-101.4 and §13-101.6 of the Florida Building Code, Building).

FIREWALL. Fire resistant wall, having protective openings, which restricts the spread of fire and extends continuously from the foundation to or through the roof, with sufficient structural stability under fire conditions to allow collapse of construction on either side without collapse of the wall.

FLEXIBLE NON-METAL DUCT. A type of flexible air duct comprised of a wire-reinforced core (usually plastic), an insulation layer and an outer jacket (usually a durable reinforced plastic).

GASKETS OR GASKETING.  A compressible, resilient, elastic packing, made of foam rubber or of a synthetic foam polymer. A gasket is distinct from the components being joined and must be capable of closing all air leakage pathways between the air barriers of the joint and of creating an air-tight seal.

INTEGRAL FLANGE DUCT COLLAR FITTING. . A type of duct collar fitting having a flange that is secured to and sealed to the cylinder or sleeve of the fitting. A function of this flange is to provide a surface which can be sealed to rigid ductboard.

MANUFACTURED BUILDING. A closed structure, building assembly, or system of subassemblies, which may include structural, electrical, plumbing, heating, ventilating or other service systems manufactured in manufacturing facilities for installation or erection, with or without other specified components, as a finished building or as part of a finished building, which shall include, but not be limited to, residential, commercial, institutional, storage, and industrial structures. This part does not apply to mobile (manufactured) homes. Manufactured building may also mean, at the option of the manufacturer, any building of open construction made or assembled in manufactured facilities away from the building site, for installation, or assembly and installation, on the building site. (Reference Chapter 13, - §13-101.2.4 of the Florida Building Code, Building).

MANUFACTURED HOME. As defined by the U.S. Department of Housing and Urban Development, residential units constructed in accordance with Federal Mobile Construction and Safety Standards, pursuant to 42 USC 55.5401, et. seq. and 24 CFR 3282 and 3283. (Reference Chapter 13, - §13-101.2.4 of the Florida Building Code, Building).

MASTIC. A thick, pliable substance that adheres well to specific materials and is used for sealing different building components together. Mastics are often used in conjunction with fibrous or mesh fabric.

MASTIC RIBBONS. Mastic ribbons are malleable, putty-like packings which are used in applications akin to those of gasketing; but, they do not have the elasticity of gasketing. Such mastics contain nearly 100 percent solid, require no curing in air, and are used without reinforcing fabric.

MECHANICAL CLOSET. For the purposes of this code, a closet used as an air plenum which contains the blower unit or air handler of a central air conditioning or heating unit.

MECHANICAL EQUIPMENT PLENUM CHAMBER>  In an air distribution system, that part of the casing, or an air chamber furnace, to or from which the air duct system delivers conditioned air.

NONCOMBUSTIBLE BUILDING MATERIALS. A material which meets either of the following requirements:
1. Materials which pass the test procedure set forth in ASTM E 136
2. Materials having a structural base of noncombustible materials as defined in 1, with a surfacing not more than 1/8 inch (3.17 mm) thick which has a flamespread rating not greater than 50 when tested in accordance with ASTM E 84.
The term noncombustible does not apply to the flamespread characteristics of interior finish or trim materials. A material shall not be classed as noncombustible which is subject to increase in combustibility or flamespread rating beyond the limits herein established through the effects of age, moisture or other atmospheric conditions.

PRESSURE VESSELS. Closed containers, tanks or vessels that are designed to contain liquids, gases or both, under pressure.

RENOVATION. Any structural repair, reconstruction or restoration to a structure, the costs of which equals or exceeds, over a 1-year period, a cumulative total of 30 percent of the assessed value of the structure when that value is assessed, either:
1. Before the improvement or repair is started; or
2. Before the damage occurred, if the structure has been damaged.
For the purposes of this code, renovation occurs when the first alteration of any wall, ceiling, floor, or other structural part or mechanical system of the building commences, whether or not that alteration affects the external dimensions of the structure. (Reference Chapter 13, - §13-101.1.3 and §13-101.2.3 of the Florida Building Code, Building).

SEAL or SEALING – AIR DUCT. The use of closure products, either welds, mastic, mastic plus embedded fabric, adhesives, caulking, gaskets, pressure sensitive tapes, heat-activated tapes or combinations thereof as allowed by specific sections of this code, to close cracks, joints, seams, and other openings in the air barriers of air duct, air handling units, and plenum chambers for the purpose of preventing air leakage. No joining of opening from which a closure product is absent shall be considered sealed unless considered otherwise in specific cases identified by this code. Closeness of fit between mated parts alone shall not be considered a seal. "Sealed to 100% closure" shall mean that wherever there is an air distribution system passageway, all joints, seams and penetrations shall be sealed with an approved air barrier.

SITE-INSTALLED COMPONENTS AND FEATURES. Equipment, materials, measures, practices and features which are affixed to a new manufactured home at its first set-up that are not initially installed by the manufacturer.  Reference Chapter 13, - §13-101.2.4 of the FBC-B, 

UNUSUALLY TIGHT CONSTRUCTION (Oil Burning Equipment). Construction in  compliance with Chapter 13 of the FBC-B  or the following requirements for oil heat: 
1.	Walls and ceilings exposed to the outside atmosphere having a continuous water vapor retarder with a rating of 1 perm (57 ng/s . m2 . Pa) or less with openings gasketed or sealed;
2.	Storm windows or weatherstripping on openable windows and doors; and
3.	Caulking or sealants applied to areas, such as joints around window and door frames, between sole plates and floors, b3etween wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines, and at other openings.

WATER HEATER. An indirect-fire fuel-burning or electrically heated appliance for heating water which does not exceed any of the following:
  1. A heat input capacity of 200,000 Btuh (58.6 kW).
  2. A water temperature of 200ºF (93ºC).
4.	A nominal water capacity of 120 gal (454 L).
5.		

This was changed in Chapter 13 during the code update process.

Per Mod 883.
	
Chapter 3 GENERAL REGULATIONS	Chapter 3 GENERAL REGULATIONS		
301.4 Listed and labeled.  All appliances regulated by this code shall be listed and labeled, unless otherwise approved in accordance with Sections 105 301.4.1 through 301.4.4.	§M301.4.1 Modifications. Whenever there are practical difficulties involved in carrying out the provisions of this code, the code official shall have the authority to grant modifications for individual cases, provided the code official shall first find that special individual reason makes the strict letter of this code impractical and the modification is in compliance with the intent and purpose of this code and that such modification does not lessen health, life and fire safety requirements. The details of action granting modifications shall be recorded and entered in the files of the mechanical inspection department.

§M301.4.2 Alternative materials, methods, equipment and appliances. The provisions of this code are not intended to prevent the installation of any material or to prohibit any method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material or method of construction shall be approved where the code official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety.
§M301.4.3 Required Testing. Whenever there is insufficient evidence of compliance with the provisions of this code, or evidence that a material or method does not conform to the requirements of this code, or in order to substantiate claims for alternative materials or methods, the code official shall have the authority to require tests as evidence of compliance to be made at no expense to the jurisdiction.
§M301.4.3.1 Test methods. Test methods shall be as specified in this code or by other recognized test standards. In the absence of recognized and accepted test methods, the code official shall approve the testing procedures.
§M301.4.3.2 Testing agency. All tests shall be performed by an approved agency.
§M301.4.3.3 Test reports. Reports of tests shall be retained by the code official for the period required for retention of public records.
§M301.4.4 Materials, equipment and appliance reuse. Materials, equipment, appliances and devices shall not be reused unless such elements have been reconditioned, tested and placed in good and proper working condition and approved.	Bring in 301.4 from FBC-M ‘01
AS	
301.12 Wind resistance. Mechanical equipment, appliances and supports that are exposed to wind shall be designed and installed to resist the wind pressures determined in accordance with the International Building Code.	301.13 Wind resistance. Mechanical equipment, appliances and supports that are exposed to wind shall be designed and installed to resist the wind pressures on the equipment and the supports as determined in accordance with the Florida Building Code, Building.  This may be accomplished by design or by application of section 301.13.1.
301.13.1 Ground-mounted units.  Ground-mounted units for R3 residential applications shall may be anchored with #14 screws with gasketed washers according to the following.  	
1. For 1.units  with sides less than 12 inches, one screw shall be used at each side of the unit 
2. For 2. units between 12 and 24 inches, two screws shall be used per side.
3. For 3.units between 24 and 36 inches, three screws shall be used per side.
4. For 4.units greater than 36 inches or 5 tons, anchorage shall be designed in accordance with 301.13..
NOTES: 
1.Corrosion protection. Buildings located within 3,000 feet of the ocean should utilize non-ferrous metal, stainless steel or steel with minimum G-90 hot-dip galvanized coating for equipment stands and anchors and stainless steel screws.
2. Strapping.  Job site strengthening of fan cowlings and vent hoods is recommended. Two or four stainless steel cables are recommended, depending on design wind conditions.  Alternatively, additional, heavy straps can be screwed to the cowling and curb.	

1/21/04 Keep “may”

Keep 301.13 FL.
Editorial:  Should change 1st line of 301.13.1 from “may” to “shall”.  The TAC wanted to modify 301.13 to require corrosion protection and strapping instead of leaving them “Notes”, but this was not proposed by 4/18/03.   AM	
301.143 Flood hazard.  For structures located in flood hazard areas, mechanical systems, equipment and appliances shall be located at or above the design flood elevation. 
Exception: Mechanical systems, equipment and appliances are permitted to be located below the design flood elevation provided that they are designed and installed to prevent water from entering or accumulating within the components and to resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to the design flood elevation in compliance with the flood-resistant construction requirements of the International Building Code.	301.14 3109.1.2 Floodplain Management Construction Standards. This code specifically defers to the authority granted to local government by Title 44 CFR, sections 59 and 60. This code is not intended to supplant or supercede local ordinances adopted pursuant to that authority, nor are local floodplain management ordinances to be deemed amendments to the code. 	The TAC voted to add “Flood Hazard Area” and “Flood Hazard area subject to high velocity wave action” from IBC ’03 to Ch 2, Definitions. AS
However, the FBC-M should defer authority to local government to be consistent with previous actions of the Commission. 	
301.15 Seismic resistance. When earthquake loads are applicable in accordance with the International Building Code, mechanical system supports shall be designed and installed for the seismic forces in accordance with the International Building Code.		Delete 301.15 IMC’03.
AS	
	M301.15 NFPA Standards. Unless otherwise specified in this code, air conditioning equipment shall comply with the following standards:
1. NFPA 90A (Standard for the Installation of Air Conditioning and Ventilating Systems)
2. NFPA 90B (Standard for the Installation of Warm Air Heating and Air Conditioning Systems)	Keep FBC-M 301.15  AS	
304.3 Elevation of ignition source. Equipment and appliances having an ignition source and located in hazardous locations and public garages, private garages , repair garages, automotive motor-fuel-dispensing facilities and parking garages shall be elevated such that the source of ignition is not less than 18 inches (457 mm) above the floor surface on which the equipment or appliance rests. Such equipment and appliances shall not be installed in Group H occupancies or control areas where open use, handling or dispensing of combustible, flammable or explosive materials occurs. For the purpose of this section, rooms or spaces that are not part of the living space of a dwelling unit and that communicate directly with a private garage through openings shall be considered to be part of the private garage.		FBC-M ’01 deleted this requirement.
AS	

304.6 Private garages. Appliances located in private garages and carports shall be installed with a minimum clearance of 6 feet (1829 mm) above the floor.
Exception: The requirements of this section shall not apply where the appliances are protected from motor vehicle impace and installed in accordance with Section 304.3.		FBC-M ’01 deleted this requirement. AS	

304.9 Clearances from grade. Equipment and appliances installed at grade level shall be supported on a level concrete slab or other approved material extending above adjoining grade or shall be suspended a minimum of 6 inches (152 mm) above adjoining grade.	
304.97 Clearances from grade.  Equipment and appliances installed at grade level shall be supported on a level minimum 3 ½ inch concrete slab or other approved material extending a minimum of 2 inches above adjoining finished grade. Suspended equipment and appliances shall be installed a minimum of 6 inches (152 mm) above adjoining grade to provide support and protection from contact with soil or water.
Exception:On changeouts or new installations of existing buildings where equipment is replaced that has a support platform approved under a previous code. 	Use 304.7 FL.
AS	

306.1 Clearances around appliances to elements of permanent construction, including other installed equipment and appliances, shall be sufficient to allow inspections, service, repair or replacement without removing such elements of permanent construction or disabling the function of a required fire resistance-rated assembly.	
306.1 Clearances around appliances to elements of permanent construciton, including other installed equipment and appliances, shall be sufficient to allow inspections, service, repair or replacement without removing such elements of permanent construction or disabling the function of a required fire resistance-rated assembly. Minimum clearances below roof mounted mechanical units shall be in accordance with Table 1511.7, Florida Building Code, Building.

[1/12/04 The Mechanical TAC voted to add Table 1511.7 FBC-B into the text of the FBC-M-04.  However, the Structural TAC did not keep the table as it was not Florida specific and is not included in the IBC-03.]
	
Mod 348 was approved by the Structural TAC and applies to the provisions from the Standard Building Code.  	
306.3 Appliances in attics. Attics containing appliances requiring access shall be provided with an opening and unobstructed passageway large enough to allow removal of the larges appliance. The passageway shall not be less than 30 inches (762mm) high and 22 inches (559mm) wide and not more than 20 feet (6096mm) in length measured along the centerline of the passageway from the opening to the appliance. The passageway shall have continuous solid flooring not less than 24 inches (610 mm) wide. A level service space not less than 30 inches (762 mm) deep and 30 inches (762 mm) wide shall be present at the front or service side of the appliance. The clear access opening dimensions shall be a minimum of 20 inches by 30 inches (508mm by 762 mm), where such dimensions are large enough to allow removal of the largest appliance.
Exception: The passageway and level service space are not required where the appliance is capable of being services and removed through the required opening.
306.3.1 Electrical requirements. A lighting fixture controlled by a switch located at the required passageway opening and a receptacle outlet shall be provided at or near the appliance location in accordance with the ICC Electrical Code.	306.3 Appliances in attics.  Attics containing appliances requiring access shall be provided with an opening and unobstructed passageway large enough to allow removal of the largest appliance.  The passageway shall not be less than 30 inches (762 mm) high and 22 inches (559 mm) wide and not more than 6 feet (1829 mm) in length measured along the centerline of the passageway from the attic access opening to the appliance’s service panel. The passageway shall have continuous solid flooring not less than 24 inches (610 mm) wide. A level service space not less than 30 inches (762 mm) deep and 30 inches (762 mm) wide shall be present at the front or service side of the appliance. The clear access opening dimensions shall be a minimum of 20 inches by 30 inches (508mm by 762 mm), where such dimensions are large enough to allow removal of the largest appliance. 
Exception: The passageway and level service space are not required where the appliance is capable of being serviced and removed through the required opening.
§M306.3.1 Electrical requirements. A lighting fixture with receptacle outlet, controlled by a switch located at the passageway opening, shall be provided so as to light the passageway and service area and installed in accordance with NFPA 70.
M306.3.2 [from 13-610.1.ABC.3.5.2] Air Handling Units.  Air handling units shall be allowed in attics if the following conditions are met:
1. The service panel of the equipment is located within six (6) feet of an attic access.
2. A device is installed to alert the owner or shut the unit down when the condensation drain is not working properly.
3. The attic access opening is of sufficient size to replace the air handler.
4. A notice is posted on the electric service panel indicating to the howmeowner that the air handler is located in the attic. Said notice shall be in all capitals, in 16 point type, with the title and first paragraph in bold:

NOTICE TO HOMEOWNER
A PART OF YOUR AIR CONDITIONING SYSTEM, THE AIR HANDLER, IS LOCATED IN THE ATTIC. FOR PROPER, EFFICIENT, AND ECONOMIC OPERATION OF THE AIR CONDITIONING SYSTEM, YOU MUST ENSURE THAT REGULAR MAINTENANCE IS PERFORMED.

YOUR AIR CONDITIONING SYSTEM IS EQUIPPED WITH ONE OR BOTH OF THE FOLLOWING:  1) A DEVICE THAT WILL ALERT YOU WHEN THE CONDENSATION DRAIN IS NOT WORKING PROPERLY OR 2) A DEVICE THAT WILL SHUT THE SYSTEM DOWN WHEN THE CONDENSATION DRAIN IS NOT WORKING. TO LIMIT POTENTIAL DAMAGE TO YOUR HOME, AND TO AVOID DISRUPTION OF SERVICE, IT IS RECOMMENDED THAT YOU ENSURE PROPER WORKING ORDER OF THESE DEVICES BEFORE EACH SEASON OF PEAK OPERATION.	Keep 306.3 FBC-M.
AS 

1/12/04 The Mechanical TAC voted to include provisions from Chapter 13 as 306.3.2 because mechanical contractors need to know this.	
	
306.5 Equipment and appliances on roofs or elevated structures Where equipment and appliances requiring access are installed on roofs or elevated structures at a height exceeding 16 feet (4877 mm), such access shall be provided by a permanent approved means of access, the extent of which shall be from grade or floor level to the equipment and appliances= level service space. Such access shall not require climbing over obstructions greater than 30 inches (762 mm) high or walking on roofs having a slope greater than 4 units vertical in 12 units horizontal (33-percent slope).
Permanent ladders installed to provide the required access shall comply with the following minimum design criteria:
1. The side railing shall extend above the parapet or roof edge not less than 30 inches (762 mm).
2. Ladders shall have rung spacing not to exceed 14 inches (356 mm) on center.
3. Ladders shall have a toe spacing not less than 6 inches (152 mm) deep.
4. There shall be a minimum of 18 inches ( 457 mm) between rails.
5. Rungs shall have a minimum 0.75-inch (19 mm) diameter and be capable of withstanding a 300-pound (136.1 kg) load.
6. Ladders over 30 feet (9144 mm) in height shall be provided with offset sections and landings capable of withstanding 100 pounds (488.2 kg/m2) per square foot.
7. Ladders shall be protected against corrosion by approved means.

Catwalks installed to provide the required access shall be not less than 24 inches (610 mm) wide and shall have railings as required for service platforms.
Exception: This section shall not apply to Group R-3 occupancies.	NOTE:  Refer to Structural TAC.	1/12/04 The TAC recommended adding these provisions to the FBC-B as S. 1509.6 because they are unenforceable by the  mechanical contractor  and inspector.	
	
307.2.2 Same, except added “cross-linked” to polyethylene	307.2.2 Drain pipe materials and sizes. Components of the condensate disposal system shall be cast iron, galvanized steel, copper polyethylene, polybutylene, polyethyene, ABS, CPVC or PVC pipe or tubine. All comoponents shall …slope.
Exception: On wall mounted ductless split units less than 36,001 Btu/h where the drain line is less than 10 feet in length the factory drain outliet size shall be acceptable from the equipment to the place of disposal.	AM. ’03 OK with exception added per Mod 1004.	
	307.2.6 Pipe Insulation. All horizontal primary condensate drains within unconditioned areas shall be insulated to prevent condensation from forming on the exterior of the drain pipe.	Mod 518    AS 	
308.6 Clearance Reduction Methods.	Expand Table 308.6 to add a 12” column in both major categories.	Keep FL 308.6 AS	
	309.1 Dishwashers. Dishwashers shall be equipped so that the normal operating cycle does not include automatic switching on the heating element for the drying portion of the operating cycle. Dishwashers, the controls of which permit the user to elect to have the heating element on during the drying portion of the operating cycle, meet this requirement.	1/12/04 The TAC voted to remove this as unenforceable.
FL specific.	
312.1Load calculations. Heating and cooling system design loads for the purpose of sizing systems, appliances and equipment shall be determined in accordance with the procedures described in the ASHRAE Handbook of Fundamentals. Heating and cooling loads shall be adjusted to account for load reductions that are achieved when energy recovery systems are utilized in the HVAC system in accordance with the ASHRAE Handbook- HVAC Systems and Equip-ment. Alternatively, design loads shall be determined by an approved equivalent compotation procedure, using the design parameters specified in Chapter 3 of the International Energy Conservation Code.	

…in accordance with the requirements of Chapter 13 of the Florida Building Code, Building:
Commercial:  Section 13-407.1.ABC.1
Residential:   Section 13-607.1.ABC.1
 	Heating & cooling load calculations. Remove & reference sections in the energy code:
AS	
Chapter 4 VENTILATION			
401.5.1 Intake openings. Mechanical and gravity outside air intake openings shall be located a minimum of 10 feet (3048 mm) from any  hazardous or noxious contaminant, such as vents, chimneys, plumbing vents, streets, alleys, parking lots and loading docks, except as other- wise specified in this code. Where a source of contaminant is located within 10 feet (3048 mm) of an intake opening, such opening shall be located a minimum of 2 feet (610 mm) below the contaminant source.	§M401.5.1 Intake openings. Mechanical and gravity outside air intake openings shall be located a minimum of 10 feet (3048 mm) from any  hazardous or noxious contaminant, such as vents, chimneys, plumbing vents, streets, alleys, parking lots and loading docks, except as otherwise specified in this code.  Fresh air intakes shall not be located closer than 10 ft (3048 mm) from any chimney or vent outlet, or sanitary sewer vent outlet.
	Keep FL 401.5.1.
AS	
Not in IMC ‘03  	402.3.1 Bathrooms. Rooms containing bathtubs, showers, spas and similar bathing fixtures shall be mechanically ventilated in accordance with Section 403.
Exception: Residential bathrooms with windows having no less than 3 sq.ft. of open space.	Keep 402.3.1 FL. AS	
403.1 Ventilation system. Mechanical ventilation shall be provided by a method of supply air and return or exhaust air. The amount of supply air shall be approximately equal to the amount of return and exhaust air. The system shall not be4 prohibited from producing negative or positive pressure. The system to convey ventilation air shall be designed and installed in accordance with Chapter 6. See also section 13-409.1.ABC.2 of the Florida Building Code, Building.  [rest of section unchanged]		Add reference to sec. 409.1.ABC.2 of the energy code. 
AS	
403.3.2 IMC	Correct typos in equation:  Y =       X        .     
                                                     1+ X - Z	AS	
Table 403.3 Required Outdoor Ventilation Air.  

[Use Table 403.3 IMC ‘03 with 1 change: Public Spaces, toilet rooms 50 75 cfm/ water closet or urinal  (as per FBC-M ’01) & fix 2 typos:  intermittent  interittent , intermediate]	“403.3 Ventilation rate. Ventilation systems for other than Group R-3 (one- and two-family dwellings), shall be designed to have the capacity to supply the minimum outdoor air….”

[rest of IMC’03 is OK]
	Fix typos.  Keep Public Space toilet rooms at 50 cfm/wc.  AM.  	
403.3.4 Balancing. Ventilation systems shall be balanced by an approved method. Such balancing shall verify that the ventilation system is capable of supplying the airflow rates required by Section 403.		Break into 2 rows; they are on different subjects	
	§M403.5 ASHRAE 62 Alternative. In lieu of compliance with §M403.1 through §M403.34, mechanical ventilation may be implemented in compliance with ASHRAE 62 including approved addenda.	Keep ASHRAE 62 Alternative. Renumber as 403.4 . AM	
	403.6 Smoke control.  Delete existing 403.6  [The TAC had voted to incorporate the Broward local amendment on this issue. Commission Counsel found that this move was invalid on procedural grounds.]	Sec. 403.6 came from the old building code. It should be replaced by new language from the IBC and moved to s. 513.	
404.1 Enclosed parking garages. Mechanical ventilation systems for enclosed parking garaged are not required to operate continuously where the system is arranged to operate automatically upon detection of a concentration of carbon monoxide of 25 parts per million (ppm) by approved automatic detection devices. See definition of Open Parking Garage in Section 202 of the Florida Building Code, Building.	 	Add reference to definition of Open Parking Garage in FBC-B 	
	405.1 Return Air Intake.
405.1.1 It shall be prohibited to place a return air intake in the following locations: public bathrooms, and non-dedicated kitchen HVAC systems. 	Mod 814.  AM	
406.1 General. Uninhabited spaces, such as crawl spaces and attics, shall be provided with natural openings as required by the Florida International Building Code, Building or shall be provided with a mechanical exhaust and supply air system. The mechanical exhaust rate shall be not less than 0.02 cfm per square foot (0.00001 m3/s . m2) of horizontal area and shall be automatically controlled to operate when the relative humidity in the space served exceeds 60 percent.		1/12/04  IMC’03 
TAC proposed deletion 1/12/04. Commission supported that action at the March meeting.	
Chapter 5 EXHAUST SYSTEMS			
501.3 Pressure equalization. Mechanical exhaust systems shall be sized to remove the quantity of air required by this chapter to be exhausted. The system shall operate when air is required to be exhausted. Where mechanical exhaust is required in a room or space in other than occupancies in Group R-3, such space shall be maintained with a neutral or negative pressure. If a greater quantity of air is supplied by a mechanical ventilating supply system than is removed by a mechanical exhaust system for a room, adequate means shall be provided for the natural exit of the excess air supplied. If only a mechanical exhaust system is installed for a room or if a greater quantity of air is removed by a mechanical exhaust system than is supplied by a mechanical ventilating supply system for a room, adequate means shall be provided for the natural supply of the deficiency in the air supplied.		The TAC voted to delete this section and refer the designer to Sections M601.4 and 409.1.ABC.2 of Chapter 13 of the Florida Building Code, Building. The Commission supported the action at the March meeting.	
501.4 Ducts. Where exhaust duct construction is not specified in this chapter, such construction shall comply with Chapter 6.	501.5 Ducts. Exhaust ducts shall be of metal and such construction shall comply with Chapter 6.	FL specific	
504.3 Cleanout. Each vertical riser shall be provided with a means for cleanout 	504.3 Cleanout. Each vertical riser shall be provided with a means for cleanout. Such means may include the exhaust duct connection to an individual dryer outlet if it is accessible and readily disassembled.	Keep FL specific.   AS	
504.6	Domestic clothes dryer ducts.  Exhaust ducts for domestic clothes dryers shall have a smooth interior finish and the maximum developed length shall not exceed 25 feet (7620 mm) from the dryer location to the outlet terminal. The maximum length of the duct shall be reduced 2 ½ 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. The male end of the duct at overlapped duct joints shall extend in the direction of airflow. Clothes dryer transition ducts used to connect the appliance to the exhaust duct system shall be limited to single lengths not to exceed 8 feet (2438 mm) in length and shall be listed and labeled for the application. Transition ducts shall not be concealed within construction.
504.6.1 Maximum length. The maximum length of a clothes dryer exhaust duct shall not exceed 25 ft (7620 mm) from the dryer location to the outlet terminal. The maximum length of ducts shall be reduced 2 ½ feet for each 45-degree (0.79 rad) bend and 5 feet (1524 mm) for each 90-degree (1.6 rad) bend. The maximum length of the exhaust duct does not include the transition duct.
Exception: Where the make and model of the clothes dryer to be installed is known and the manufacturer’s installat6ion instructions for such dryer are provided to the code official, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the dryer manufacturer’s installation instructions.
504.6.2 Rough-in required. Where a compartment or space for a domestic clothes dryer is provided, an exhaust duct system shall be installed in accordance with Sections 504.6 and 504.6.1.	504.6  Domestic clothes dryer ducts.  Exhaust ducts for domestic clothes dryers shall have a smooth interior finish and the maximum developed length shall not exceed 25 feet (7620 mm) from the dryer location to the outlet terminal. The maximum length of the duct shall be reduced 2 ½ 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. The male end of the duct at overlapped duct joints shall extend in the direction of airflow. Clothes dryer transition ducts used to connect the appliance to the exhaust duct system shall be limited to single lengths not to exceed 8 feet (2438 mm) in length and shall be listed and labeled for the application. Transition ducts shall not be concealed within construction. Developed duct lengths longer than 25 feet (7620mm) shall be allowed for specific dryer installations where the dryer manufacturer’s installation instructions specify the allowable developed length of an engineered system.
Exception: Where a clothes dryer booster fan is installed and listed and labeled for the application, the maximum length of the exhaust duct, including any transition duct, shall be permitted to be in accordance with the booster fan manufacturer’s installation instructions. Where a clothes dryer booster fan is installed and not readily accessible from the room in which the dryer is located, a permanent identifying label shall be placed adjacent to where the exhaust duct enters the wall. The label shall bear the words “This dryer exhaust system is equipped with a remotely located booster fan.”	Keep FL specific

Add exception 1 from s. 1501.3 IRC.   

Keep 504.6.2 IMC’03        

                    AM	
	
505.2 INSTALLATION OF MICROWAVE OVENS  Installation of microwave oven over a cooking appliance. The installation of a listed and labeled cooking appliance or microwave oven over a listed and labeled cooking appliance shall conform to the terms of the upper appliance's listing and label and the manufacturer's installation instructions.

505.3 OVERHEAD EXHAUST HOODS General. Domestic open-top broiler units shall be provided with a metal exhaust hood, not less than 28 gage, with a clearance of not less than 0.25 inch (6.4 mm) between the hood and the underside of combustible material or cabinets. A clearance of at least 24 inches (610 mm) shall be maintained between the cooking surface and the combustible material or cabinet. The hood shall be at least as wide as the broiler unit and shall extend over the entire unit. Such exhaust hood shall discharge to the outdoors and shall be equipped with a back draft damper or other means to control infiltration/exfiltration when not in operation. Broiler units incorporating an integral exhaust system, and listed and labeled for use without an exhaust hood, need not be provided with an exhaust hood.	
Keep FL specific. AS. 

These sections were added from the IRC during the “glitch” fix cycle.	

506.1 General. Commercial kitchen hood ventilation ducts and exhaust equipment shall comply with the requirements of this section. Commercial kitchen grease ducts shall be designed for the type of cooking appliance and hood served. 	
506.1 General. Commercial kitchen grease ducts and exhaust equipment shall comply with the requirements of this section. Commercial kitchen grease ducts shall be designed for the type of cooking appliance and hood served. Unless otherwise specified in this chapter, grease hoods and grease hood duct systems shall conform to NFPA 96.	Keep FL specific.	

506.3.2 Joints, seams and penetrations of grease ducts. Joints, seams and penetrations of grease ducts shall be made with a continuous liquid- tight weld or braze made on the external surface of the duct system.
Exceptions:
1. Penetrations shall not be required to be welded or brazed where sealed by devices that are listed for the application.
2. Internal welding or brazing shall not be prohibited provided that the joint is formed or ground smooth and is provided with ready access for inspection.
3.Listed and labeled factory-built commercial kitchen grease ducts installed in accordance with Section 304.1
.	
506.3.2§M506.3.4 Joints, seams and penetrations of grease ducts. Joints, seams and penetrations of grease ducts shall be made with a continuous liquid- tight weld made on the external surface of the duct system.
Exceptions:
1. Penetrations shall not be required to be welded where sealed by devices that are listed for the application.
2. Internal welding shall not be prohibited provided that the joint is formed or ground smooth and is provided with ready access for inspection.
3. Listed and labeled factory-built commercial kitchen grease ducts installed in accordance with Section 304.1.
	
Keep FL specific
AS	

506.3.2.2 Duct-to-hood joints. Duct-to-hood joints shall be made with continuous internal or external liquid-tight welded or brazed joints. Such joints shall be smooth, accessible for inspection, and without grease traps. 
Exceptions 1 and 2: Same
	
506.3.2.2 506.3.4.2 Duct to hood joints. Duct to hood joints shall be made with continuous internal or external liquid-tight welded joints. Such joints shall be smooth, accessible for inspection, and without grease traps. 
Exceptions 1 and 2:  Unchanged.
	
Keep FL 506.3.4.2.
AS

506.3.8 Cleanouts and other openings. Grease duct systems shall not have openings therein other than those required for proper operation and maintenance of the system.  Any portion of such system having sections not provided with access from the duct entry or discharge shall be provided with cleanout openings.  Cleanout openings shall be equipped with tight-fitting doors constructed of steel having a thickness not less than that required for the duct.  Doors shall be equipped with a substantial method of latching, sufficient to hold the door tightly closed.  Doors shall be designed so that they are operable without the use of a tool.  Door assemblies, including any frames and gasketing, shall be approved for the purpose, and shall not have fasteners that penetrate the duct.  Listed and labeled access door assemblies shall be installed in accordance with the terms of the listing.	
§M506.3.810 Cleanouts and other openings. Grease duct systems shall not have openings therein other than those required for proper operation and maintenance of the system.  Any portion of such system having sections not provided with access from the duct entry or discharge shall be provided with cleanout openings.  Cleanout openings shall be equipped with tight-fitting doors constructed of steel having a thickness not less than that required for the duct.  Doors shall be equipped with a substantial method of latching, sufficient to hold the door tightly closed.  Doors shall be designed so that they are operable without the use of a tool.  Door assemblies, including any frames and gasketing, shall be approved for the purpose, and shall not have fasteners that penetrate the duct.  Listed and labeled access door assemblies shall be installed in accordance with the terms of the listing.  A sign shall be placed on all access panels stating:  ACCESS PANEL - DO NOT OBSTRUCT in letters at least 1 inch high.
	
Keep FL specific.
AS	

506.3.4 Air velocity. Grease duct systems serving a Type I hood shall be designed and installed to provide an air velocity within the duct system of not less than 1,500 feet per minute (7.6 m/s) .
Exception: The velocity limitations shall not apply within duct transitions utilized to connect ducts to differently sized or shaped openings in hoods and fans, provided that such transitions do not exceed 3 feet (914 mm) in length and are designed to prevent the trapping of grease.
	
506.3.46 Air velocity. Grease duct systems serving a Type I hood shall be designed and installed so as to provide an air velocity within the duct system of not less than 1,500 feet per minute (7.6 m/s) and not greater than 2,500 feet per minute (13 m/s).
Exception: The velocity limitations shall not apply within duct transitions utilized to connect ducts to differently sized or shaped openings in hoods and fans, provided that such transitions do not exceed 3 feet (914 mm) in length and are designed to prevent the trapping of grease.	
Retain 506.3.6 FL. Check NFPA 96.
AM	

506.3.10 Grease duct enclosure. A grease duct serving a Type I hood that penetrates a ceiling, wall or floor shall be enclosed from the point of penetration to the outlet terminal. A duct shall penetrate exterior walls only at locations where unprotected openings are permitted by the Florida International Building Code, Building. Ducts shall be enclosed in accordance with the Florida International Building Code, Building, requirements for shaft construction. The duct enclosure shall be sealed around the duct at the point of penetration and vented to the outside of the building through the use of weather-protected openings. Clearance from the duct to the interior surface of enclosures of combustible construction shall be not less than 18 inches (457 mm). Clearance from the duct to the interior surface of enclosures of noncombustible construction or gypsum wallboard attached to noncombustible structures shall be not less than 6 inches (152 mm). The duct enclosure shall serve a single grease exhaust duct system and shall not contain any other ducts, piping, wiring or systems.
 Exceptions:
1. The shaft enclosure provisions of this section shall not be required where a duct penetration is protected with a through-penetration firestop system classified in accordance with ASTM E 814 and having an AF@ and AT@ rating equal to the fire-resistance rating of the assembly being penetrated and where the surface of the duct is continuously covered on all sides from the point at which the duct penetrates a ceiling, wall or floor to the outlet terminal with a classified and labeled material, system, method of construction or product specifically evaluated for such purpose, in accordance with a nationally recognized standard for such enclosure materials. Exposed duct wrap systems shall be protected where subject to physical damage.
2. A duct enclosure shall not be required for a grease duct that penetrates only a nonfire-resistance-rated roof/ceiling assembly.	
506.3.12 Duct enclosure. A grease duct serving a Type I hood that penetrates a ceiling, wall or floor shall be enclosed from the point of penetration to the outlet terminal. A duct shall only penetrate exterior walls at locations where unprotected openings are permitted by the building code. Ducts shall be enclosed in accordance with the building code requirements for shaft construction. The duct enclosure shall be sealed around the duct at the point of penetration and vented to the outside of the building through the use of weather-protected openings. The enclosure shall be separated from the duct by a minimum of 6 inches (152 mm) and a maximum of 12 inches (305mm) and shall serve a single grease 3exhaust duct system.
Exceptions:  
1. The shaft enclosure provisions of Section 506.3.102 shall not be required where a duct penetration is protected with a through-penetration firestop system classified, and installed as tested, in accordance with ASTM E814 and having The system shall have an F and T rating equal to of not less than 1 hour, but not less than the required fire resistance rating of the assembly being penetrated and where the surface of the duct is continuously covered on all sides from the point at which the duct penetrates a ceiling, wall or floor to the outlet terminal with a classified and labeled material, system, method of construction or product specifically evaluated for such purpose, in accordance with a nationally recognized standard for such enclosures.
2. . A duct enclosure shall not be required for a grease duct that penetrates only a nonfire-resistance-rated roof/ceiling assembly.
	
1/12/04 The TAC voted to add exception 2 from IMC’03 to the FL specific criteria.

Mod 412   AS

506.3.12 Exhaust outlets serving Type I hoods. Exhaust outlets for grease ducts serving Type I hoods shall conform to the requirements of Sections 506.3.12.1 through 506.3.12.3.
 506.3.12.1 Termination above the roof. Exhaust outlets that terminate above the roof shall have the discharge opening located not less than 40 inches (1016 mm) above the roof surface.
 506.3.12.2 Termination through an exterior wall. Exhaust outlets shall be permitted to terminate through exterior walls where the smoke, grease, gases, vapors, and odors in the discharge from such terminations do not create a public nuisance or a fire hazard. Such terminations shall not be located where protected openings are required by the International Building Code. Other exterior openings shall not be located within 3 feet (914 mm) of such terminations.
	
506.3.14 Type I exhaust outlets. Exhaust outlets for grease ducts serving commercial food heat-processing appliances shall conform to the requirements of Sections 506.3.14.1 through 506.3.14.2.
506.3.14.1 Termination above the roof. Exhaust outlets that terminate above the roof shall have the discharge of the grease hood duct system, located not less than 2 feet (610 mm) above the roof surface. The air flow from exhaust outlets conveying grease-laden vapors shall be in a vertical direction away from the roof surface.
506.3.14.2 Termination through an exterior wall. Where approved by the code official, exhaust outlets shall be permitted to terminate through noncombustigble exterior walls. Such terminations shall not be located where prot3ected openings are required by the building code. Other exterior openings shall not be located within 3 feet (914 mm) of such terminations.
	
The TAC decided in favor of section 506.3.12 of the IMC’03.	
507.7Hood joints, seams and penetrations. Hood joints, seams and penetrations shall comply with Sections 507.7.1 and 507.7.2.
 507.7.1 Type I hoods. External hood joints, seams and penetrations for Type I hoods shall be made with a continuous external light-tight weld or braze to the lowest outermost perimeter of the hood. Internal hood joints, seams, penetrations, filter support frames, and other appendages attached inside the hood shall not be required to be welded or brazed but shall be otherwise sealed to be grease tight. 
Exceptions: 
1. Penetrations shall not be required to be welded or brazed where sealed by devices that are listed for the application.
2. Internal welding or brazing of seams, joints, and penetrations of the hood shall not be prohibited provided that the joint is formed smooth or ground so as to not trap grease, and is readily cleanable.	§M507.7 Hood joints, seams and penetrations. External hood joints, seams and penetrations shall be made with a continuous external liquid-tight weld to the lowest outermost perimeter of the hood. Internal hood joints, seams, penetrations, filter support frames, and other appendages attached inside the hood shall not be required to be welded but shall be otherwise sealed to be grease tight.
Exceptions:
1. Penetrations shall not be required to be welded where sealed by devices that are listed for the application.
2. Internal welding of seams, joints, and penetrations of the hood shall not be prohibited provided that the joint is formed smooth or ground so as to not trap grease, and is readily cleanable.
3. External hood joints and seams tested and listed in accordance with the requirements of UL 710 shall not be required to be welded.	Keep FL specific 507.7.
AS	
507.7.2 Type II hoods. Joints, seams and penetrations for Type II hoods shall be constructed as set forth in Chapter 6, shall be sealed on the interior of the hood and shall provide a smooth surface that is readily cleansable and water tight.		Keep 507.7.2 IMC
	
507.11.1Criteria. Filters shall be of such size, type and arrangement as will permit the required quantity of air to pass through such units at rates not exceeding those for which the filter or unit was designed or approved. Filter units shall be installed in frames or holders so as to be readily removable without the use of separate tools, unless designed and installed to be cleaned in place and the system is equipped for such cleaning in place. Removable filter units shall be of a size that will allow them to be cleaned in a dishwashing machine or pot sink. Filter units shall be arranged in place or provided with drip-intercepting devices to prevent grease or other condensate from dripping into food or on food preparation surfaces. 

Table 507.11	507.11.1 Criteria. Filters shall be of such size, type and arrangement as will permit the required quantity of air to pass through such units at rates not exceeding those for which the filter or unit was designed or approved. Filter units shall be installed in frames or holders so as to be readily removable without the use of separate tools, unless designed and installed to be cleaned in place and the system is equipped for such cleaning in place. Removable filter units shall be of a size that will allow them to be cleaned in a dishwashing machine or pot sink. Filter units shall be arranged in place or provided with drip-intercepting devices to prevent grease or other condensate from dripping into food or on food preparation surfaces. Listed grease filters shall conform to the requirements of UL 1046.
TABLE M507.11
MINIMUM DISTANCE BETWEEN THE LOWEST EDGE OF A GREASE FILTER
AND THE COOKING SURFACE OR THE HEATING SURFACE

  TYPE OF COOKING APPLIANCE	HEIGHT ABOVE COOKING SURFACE
                                                                                                (feet)
  Without exposed flame				            1/2
  Exposed flame and burners				2
  Exposed charcoal and charbroil type			4

For SI: 1 foot = 304.8 mm	Keep FL 507.11.1.
AS	

Same as FBC ’01. Delete.	
508.1.1.1 Makeup air temperature. The temperature differential between makeup air and the air in the conditioned space shall not exceed 10oF (6oC).
1.	Makeup air that is part of the air conditioning system.
2.	Makeup air that does not decrease the comfort conditions of the occupied space.	
Mod 972   AS	

510.8.1 Duct joints. Ducts shall be made tight with lap joints having a minimum lap of 1 inch (25 mm).	
510.8.1 Duct joints. Ducts shall be made tight with the male end of the duct overlapped a minimum of 1 inch (25 mm) with duct joints extending in the direction of air flow.	
1/12/04 Keep FL specific.	

511.1 Dust, stock and refuse conveying systems. Dust, stock and refuse conveying systems shall comply with the provisions of Section 510 and Sections 511.1.1 through 511.2. 	
§M511.1 Dust, stock and refuse conveying systems. Dust, stock and refuse conveying systems shall comply with the provisions of §M511.1.1 through §M511.23 Unless otherwise specified in this section, dust, stock and refuse conveying systems shall also comply with §M510 and NFPA 91.	
Keep 511.1 FL lead in paragraph only, fix section numbers.AM	
	
§M511.3.1 Ambient Temperature Noncombustible Materials. Dusts conveying ambient temperature noncombustible materials shall have a minimum clearance of 1/2 inch from combustible construction and a minimum of 6 inch clearance to store combustible materials.

§M511.3.2 Ambient Temperature Combustible Materials. Dusts conveying ambient temperature combustible materials shall have a minimum clearance of 18 inches from combustible construction or combustible materials.
Exceptions: 
1: Clearance may be reduced to 6 inches from combustible materials and to 1/2 inch from combustible construction if the duct system is provided for the specific hazard.
EXCEPTION NO. 2: Clearances from ducts to combustible material may be reduced if the combustible material is protected in accordance with Table M308.6.

§M511.3.3 Systems Operating at Temperatures Above 100ºF. Ducts conveying materials whose temperature exceeds 100ºF (37.7ºC) shall have clearances in accordance with Table M511.3.3. All ducts shall be lined with refractory materials if the temperature of the conveyed material exceeds 900º.

TABLE M511.3.3
CLEARANCES FOR DUCTS CONVEYING MATERIALS
TEMPERATURES EXCEEDING 100ºF

             Product                  Maximum                      Minimum
           Temperature           Dimension of Duct         Clearance
            (In Duct)                 (inches)                          (inches)

            101º-600º           Up to and including 8           8 
                                       Over 8                                 12

            601º-900º           Up to and including 8          18 
                                       Over 8                                  24

               901º        All ducts shall be lined with       24
                               refractory material

§M511.4 Wood Processing and Woodworking Facilities. Wood processing facilities that produce or utilize finely divided wood particles or wood fibers shall conform with NFPA 664.
Exception: Facilities with an area of 2000 ft^2 (185.8 m^2 or less and have a dust collection flow rate of 1500 ft^3/min (2548.6 m^3/sec) or less.	
Insert 511.3 FBC-M (and table) & 511.4 into IMC text.
AM	
513 Smoke Control Systems                                                                                                                                                                                                                        Use IMC’03	
513.1 Scope and purpose. This section applies to mechanical and passive smoke control systems that are required by the Florida International Building Code, Building, and shall apply to high rise buildings as defined in the Florida Building Code, Building.  The purpose of this section is to establish minimum requirements for the design, installation and acceptance testing of smoke control systems that are intended to provide a tenable environment for the evacuation or relocation  of occupants. These provisions are not intended for the preservation of contents, the timely restoration of operations, or for assistance in fire suppression or overhaul activities. Smoke control systems regulated by this section serve a different purpose than the smoke- and heat-venting provisions found in Section 910 of the Florida International Building Code, Building.

513.2 – 513.20 [Use IMC’03]	403.6 Smoke control. 	1/12/04 TAC voted to use S 513 of the IMC’03 and specify that it shall apply to high rise bldgs as defined in  FBC-B.
Delete FL 403.6 was taken from the FBC-B (the old SBC). 	
	
Not in IMC ’03.	SECTION M5153: MAUSOLEUM RELIEF VENT
§M5153.1 General. A pressure relief vent shall be provided for each crypt. Niches shall not require pressure relief systems.

§M5153.2 Materials. The pressure relief vent pipe and fittings shall conform to one of the standards listed in Table M5153.2A and Table M5153.2B.

TABLE M5153.2A: CRYPT PRESSURE RELIEF PIPE

                       MATERIAL                                         STANDARD                                        .Acrylonitrile butadiene styrene (ABS) plastic pipe	ASTM D 2661
                                                                                     ASTM F 628 CSA B181.1
Polylefin pipe	                   		             CSA CAN/CSA - B181.3
Polyvinyl chloride (PVC) plastic pipe  (Type DWV)	ASTM D 2665 
                                                                                     ASTM D 2949, ASTM F 891
TABLE M5153.2B
CRYPT PRESSURE RELIEF PIPE

          MATERIAL			                         	STANDARD                       
Acrylonitrile butadiene styrene (ABS) plastic pipe   		ASTM D 3311,  CSA B181.1
Polyvinyl chloride (PVC) plastic pipe (Type DWV		ASTM D 3311,  ASTM D 2949,
                                                                                                     ASTM F 891 
Plastic, general			                             	ASTM F 409
§M5153.3 Pressure relief vent. Each crypt shall have a pressure relief vent from the crypt to the roof of the mausoleum. The minimum nominal pipe size shall be 1 inch (25.4 mm). The system shall have a minimum of one-eighth unit vertical to 12 units horizontal (1-percent slope). The piping shall not be trapped or installed to trap water or condensate.
§M5153.4 Termination. Crypt pressure relief system shall extend through the roof and terminate at least 6 inches (152 mm) above the roof and at least 10 feet (3048 mm) from any openable opening, air intake, or property line. The termination of the relief system pipe shall be done by a roof and vent cap compatible with the relief pressure pipe. The roof and vent cap shall be waterproof.	Keep 513 FL, becomes 515
AS	
Chapter 6 DUCT SYSTEMS			

Not in IMC.	§M601.4 Balanced Return Air. Restricted return air occurs in buildings when returns are located in central zones and closed interior doors impede air flow to the return grill or when ceiling spaces are used as return plenums and fire walls restrict air movement from one portion of the return plenum to another. Provisions shall be made in both residential and commercial buildings to avoid unbalanced air flows and pressure differentials caused by restricted return air. Pressure differentials across closed doors where returns are centrally located shall be limited to 0.01 inch WC (2.5 pascals) or less. Pressure differentials across fire walls in ceiling space plenums shall be limited to 0.01 inch WC (2.5 pascals) by providing air duct pathways or air transfer pathways from the high pressure zone to the low zone.
Exceptions:  
1. Transfer ducts may achieve this by increasing the return transfer 1½  times the cross sectional area (square inches) of the supply duct entering the room or space it's serving and the door having at least an unrestricted 1 inch undercut to achieve proper return air balance.
2. Transfer grilles shall use 50 square inches (of grille area) to 100 cfm (of supply air) for sizing through-the-wall transfer grilles and using an unrestricted 1 inch undercutting of doors to achieve proper return air balance.
3.Habitable rooms only shall be required to meet these requirements for proper balanced return air excluding bathrooms, closets, storage rooms and laundry rooms, except that all supply air into the master suite shall be inlcuded.	Insert 601.4 FL:
AS	
602.2.1 Materials exposed within plenums. Except as required by Sections 602.2.1.1 through 602.2.1.5, materials exposed within plenums shall be non-combustible or shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 50 when tested in accordance with ASTM E 84.
Exceptions:
1. Rigid and flexible ducts and connectors shall conform to Section 603.
2. Duct coverings, linings, tape and connectors shall conform to Sections 603 and 604.
3. This section shall not apply to materials exposed within plenums in one-and two-family dwellings.
4. This section shall not apply to smoke detectors.
5. Combustible materials enclosed in approved gypsum board assemblies or enclosed in materials listed and labeled for such application.	§M602.2.1 Materials exposed within plenums. Except as required by §M602.2.1.1 through §M602.2.1.3, materials exposed within plenums shall be noncombustible or shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 50 when tested in accordance with ASTM E 84.
EXCEPTIONS:
1. Rigid and flexible ducts and connectors shall conform to §M603.
2. Duct coverings, linings, tape and connectors shall conform to §M603 and §M604.
3. This section shall not apply to materials exposed within plenums in one-and two-family dwellings.
4. Smoke detectors.
65. Condensate Pump Units with a total volume not exceeding 2 cubic feet.
76. Loudspeakers, loudspeaker assemblies, and their accessories exposed within a plenum shall have a peak optical density not greater than 0.50, an average optical density not greater than 0.15, and a peak heat release rate not greater than 100 kW when tested in accordance with UL 2043.	Keep FL specific exceptions.
AM	
	SECTION 603  DUCT CONSTRUCTION AND INSTALLATION
§M603.1 General. An air distribution system shall be designed and installed to supply the required distribution of air. The installation of an air distribution system shall not affect the fire protection requirements specified in the building code. Ducts shall be constructed, braced, reinforced and installed to provide structural strength and durability. All transverse joints, longitudinal seams and fitting connections shall be securely fastened and sealed in accordance with the applicable standards of this section.

All enclosures which form the primary air containment passageways for air distribution systems shall be considered ducts or plenum chambers and shall be constructed and sealed in accordance with the applicable criteria of this section.

§M603.1.1 Mechanical fastening. All joints between sections of air ducts and plenums, between intermediate and terminal fittings and other components of air distribution systems, and between subsections of these components shall be mechanically fastened to secure the sections independently of the closure system(s).
§M603.1.2 Sealing. Air distribution system components shall be sealed to 100 percent closure with approved closure systems.
§M603.1.3 Space provided. Sufficient space shall be provided adjacent to all mechanical components located in or forming a part of the air distribution system to assure adequate access for (1) construction and sealing in accordance with the requirements of §M603.1 of this code (2) inspection and (3) cleaning and maintenance. A minimum of 4" is considered sufficient space around air handling units.
§M603.1.4 Product application. Closure products shall be applied to the air barriers of air distribution system components being joined in order to form a continuous barrier or they may be applied in accordance with the manufacturer's instructions or appropriate industry installation standard where more restrictive.
§M603.1.5 Surface preparation. The surfaces upon which closure products are to be applied shall be clean and dry in accordance with the manufacturer's installation instructions.
§M603.1.6 Approved mechanical attachments. Approved mechanical attachments for air distribution system components include screws, rivets, welds, inter-locking joints crimped and rolled, staples, twist in (screw attachment), and compression systems created by bend tabs or screw tabs and flanges or by clinching straps. Mechanical attachments shall be selected to be appropriate to the duct system type	Got left off previous matrix.	
	§M603.1.7 Approved Closure Systems. Closure system materials, including adhesives when used, shall have a flamespread rating not over 25 without evidence of continued progressive combustion and a smoke developed rating not over 50 when tested in accordance with the ASTM E 84. The following closure systems and materials are approved for air distribution construction and sealing for the applications and pressure classes prescribed in §M603.2 through §M603.9:
1. Metal Closures.
a. Welds applied continuously along metal seams or joints through which air could leak.
b. Snaplock seams, and grooved, standing, double-corner, and Pittsburgh-lock seams as defined by SMACNA, as well as all other rolled mechanical seams. All seams shall be rolled or crimped.
2. Gasketing, which achieves a 25/50 Flamespread, Smoke Density Development rating under ASTM E 84 or UL 723, provided that it is used only between mated surfaces which are mechanically fastened with sufficient force to compress the gasket and to fill all voids and cracks through which air leakage would otherwise occur.
3. Mastic Closures. Mastic shall be placed over the entire joint between mated surfaces. Mastics shall not be diluted. Approved mastics include the following:
a. Mastic or mastic plus embedded fabric systems applied to fibrous glass ductboard that are listed and labeled in accordance with the Standard UL 181A, Part III.
b. Mastic or mastic plus embedded fabric systems applied to nonmetal flexible duct that are listed and labeled in accordance with the Standard UL 181B, Part II.
c. Mastic ribbons, which achieve a 25/50 Flamespread, Smoke Density Development rating under ASTM E 84 or UL 723, provided that they may be used only in flange-joints and lap-joints, such that the mastic resides between two parallel surfaces of the air barrier and that those surfaces are mechanically fastened.
4. Tapes. Tapes shall be applied such that they extend not less than 1 inch onto each of the mated surfaces and shall totally cover the joint. When used on rectangular ducts, tapes shall be used only on joints between parallel rigid surfaces and on right angle joints. Approved tapes include the following:
a. Pressure-sensitive tapes.
1) Pressure-sensitive tapes applied to fibrous glass ductboard that are listed and labeled in accordance with the Standard UL 181A, Part I. 2) Pressure-sensitive tapes applied to nonmetal flexible duct that are listed and labeled in accordance with the Standard UL 181B, Part I.
b. Heat-activated tapes applied to fibrous glass ductboard that are listed and labeled in accordance with the Standard UL 181A, Part II.
5. Aerosol Sealant. Such sealants shall be installed by manufacturer-certified installers following manufacturer instructions and shall achieve 25/50 Flamespread/Smoke Density Development ratings under ASTM E 84 or UL 723.	Keep FL specific	

603.2 Duct sizing. Ducts installed within a single dwelling unit shall be sized in accordance with ACCA Manual D or other approved methods. Ducts installed within all other buildings shall be sized in accordance with the ASHRAE Handbook of Fundamentals or other equivalent computation procedure.

 603.3 Duct classification. Ducts shall be classified based on the maximum operating pressure of the duct at pressures of positive or negative 0.5, 1.0, 2.0, 3.0, 4.0, 6.0 or 10.0 inches of water column. The pressure classification of ducts shall equal or exceed the design pressure of the air distribution in which the ducts are utilized.

603.4 Metallic ducts. All metallic ducts shall be constructed as specified in the SMACNA HVAC Duct Construction StandardsCMetal and Flexible. 
Exception: Ducts installed within single dwelling units shall have a minimum thickness as specified in Table 603.4.

	
603.2 Duct classification. Ducts shall be classified based on the maximum operating pressure of the duct at pressures of positive or negative 0.5, 1.0, 2.0, 3.0, 4.0, 6.0 or 10.0 inches of water column. The pressure classification of ducts shall equal or exceed the design pressure of the air distribution in which the ducts are utilized.
§M603.3 Metallic ducts, Rigid and Flexible. All ducts shall be constructed of iron, steel, aluminum or other approved material. Ducts shall be constructed as specified in the SMACNA HVAC Duct Construction Standards - Metal and Flexible.
Exception: Ducts installed within single dwelling units shall have a minimum thickness as specified in Table M603.3.
All transverse joints, longitudinal seams and duct wall penetration of ducts and joints with other air distribution systems components shall be mechanically attached and sealed to 100 percent closure using approved closure systems for that pressure class specified in §M603.3.1 or §M603.3.2.
§M603.3.1 Pressure less than 1 inch water gage, Approved closure systems. The following closure systems are approved for rigid metal duct designed to be operated at pressures less than 1" w.g. when they conform to the approved closure and mechanical attachment requirements of §M603.1:
1. Continuous welds.
2. Snaplock seams, and grooved, standing, double-corner, single-corner and Pittsburgh lock seams and all other rolled mechanical seams.
3. Mastic, mastic-plus-embedded fabric, or mastic ribbons.
4. Gaskets.
5. Pressure-sensitive tape.
6. Aerosol sealant.
§M603.3.2 Pressure 1 Inch Water Gage or Greater, Approved Closure Systems. The following closure systems are approved for rigid metal duct designed to be operated at pressures 1" w.g. or greater and flexible duct when they conform to the approved closure and mechanical attachment requirements of §M603.1:
1. Continuous welds.
2. Mastic, mastic-plus-embedded fabric, or mastic ribbons.
3.	Gaskets.
	1/12/04
Keep FL specific. Keep 603.2 IMC’03. Renumber.	
	§M603.3.3 High Pressure Duct Systems. High pressure duct systems designed to operate at pressures greater than 3 inches water gauge (4 inches water gauge pressure class), shall be tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual. The tested duct leakage class, at a test pressure equal to the design duct pressure class rating, shall be equal to or less than Leakage Class 6. Leakage testing may be limited to representative sections of the duct system but in no case shall such tested sections include less than 25 percent of the total installed duct area for the designated pressure class.

	603 FL specific

	

TABLE 603.4: Same as Table 603.3 FL	TABLE 603.3
DUCT CONSTRUCTION MINIMUM SHEET METAL
THICKNESSES FOR SINGLE DWELLING UNITS
DUCT SIZE	
GALVANIZED STEEL	
APPROXIMATE ALUMINUM B.&S. GAGE	

Minimum thickness (inches)	
Equivalent galvanized
Gage No.	

Round ducts & enclosed rectangular ducts
                      14” or less
                       Over 14”	

0.013
0.016	

30
28	

26
24	

Exposed rectangular ducts
                      14” or less
                       Over 14”	

0.016
0.019	

28
26 0.019	

24
22	

For SI:  1 inch = 25.4 mm.

Fix typo	

603.5 Nonmetallic ducts. Nonmetallic ducts shall be constructed with Class 0 or Class 1 duct material in accordance with UL 181. Fibrous duct construction shall conform to the SMACNA Fibrous Glass Duct Con- struction Standards or NAIMA Fibrous Glass Duct Construction Standards. The maximum air temperature within nonmetallic ducts shall not exceed 250EF121EC).
603.5.1 Gypsum ducts. The use of gypsum boards to form air shafts (ducts) shall be limited to return air systems where the air temperatures do not exceed 125EF (52EC) and the gypsum board surface temperature is maintained above the airstream dew-point temperature. Air ducts formed by gypsum boards shall not be incorporated in air-handling systems 
utilizing evaporative coolers.

603.6 Flexible air ducts and flexible air connectors. Flexible air ducts, both metallic and nonmetallic, shall comply with Sections 603.6.1, 603.6.1.1, 603.6.3 and 603.6.4. Flexible air connectors, both metallic and nonmetallic, shall comply with Sections 606.6.2 through 603.6.4.
603.6.1 Flexible air ducts. Flexible air ducts, both metallic and nonmetallic, shall be tested in accordance with UL 181. Such ducts shall be listed and labeled as Class 0 or Class 1 flexible air ducts and shall be installed in accordance with Section 304.1.
603.6.1.1 Duct length. Flexible air ducts shall not be limited in length.
603.6.2 Flexible air connectors. Flexible air connectors, both metallic and nonmetallic, shall be tested in accordance with UL 181. Such connectors shall be listed and labeled as Class 0 or Class 1 flexible air connectors and shall be installed in accordance with Section 304.1.
603.6.2.1 Connector length. Flexible air connectors shall be limited in length to 14 feet (4267 mm).
603.6.2.2 Connector penetration limitations. Flexible air connectors shall not pass through any wall, floor or ceiling.
603.6.3 Air temperature. The design temperature of air to be conveyed in flexible air ducts and flexible air connectors shall be less than 250EF (121EC).
603.6.4 Flexible air duct and air connector clearance. Flexible air ducts and air connectors shall be installed with a minimum clearance to an appliance as specified in the appliance manufacturer=s installation instructions.
 603.7 Rigid duct penetrations. Duct system penetrations of walls, floors, ceilings and roofs and air transfer openings in such building components shall be protected as required by Section 607.	
M603.4 Nonmetallic ducts. Nonmetallic ducts shall be constructed with Class 0 or Class 1 duct material in accordance with UL 181. Fibrous duct construction shall conform to the SMACNA Fibrous Glass Duct Construction Standards or NAIMA Fibrous Glass Duct Construction Standards. The maximum air temperature with nonmetallic ducts shall not exceed 250oF(121oC).
M603.4.1 Gypsum. Gypsum boards that form air shafts (ducts) shall be limited to return air systems where the air temperatures do not exceed 125oF (52oC) and the gypsum board surface temperature is maintained above the airstream dew-point temperature. Gypsum return air ducts shall not be incorporated in air-handling systems utilizing evaporative coolers.
§M603.4.2 Fibrous Glass Duct, Rigid. All joints, seams and duct wall penetrations including, but not limited to, the joints between sections of duct and the joints between duct and other distribution system components shall be mechanically attached and sealed to 100 percent closure using approved closure systems as specified in §M603.1.
§M603.4.2.1 Approved Closure Systems. The following closure systems are approved for rigid fibrous glass ducts when they conform to the approved closure and mechanical attachment requirements of §M603.1:
1. Heat-activated tapes.
2. Pressure-sensitive tapes.
3. Mastics or mastic-plus-embedded fabric systems.
§M603.4.2.2 Mechanical Fastening.  Attachments of ductwork to air handling equipment shall be by mechanical fasteners. Where access is limited, two fasteners on one side shall be acceptable when installed in accordance with Section M603.1.6.

603.5 Flexible air ducts and flexible air connectors. Flexible air ducts, both metallic and nonmetallic, shall comply with Sections 603.6.1, 603.6.1.1, 603.6.3 and 603.6.4. Flexible air connectors, both metallic and nonmetallic, shall comply with Sections 606.6.2 through 603.6.4.
603.5.1 Flexible air ducts. Flexible air ducts, both metallic and nonmetallic, shall be tested in accordance with UL 181. Such ducts shall be listed and labeled as Class 0 or Class 1 flexible air ducts and shall be installed in accordance with Section 304.1.
603.5.1.1 Duct length. Flexible air ducts shall not be limited in length.
603.5.2 Flexible air connectors. Flexible air connectors, both metallic and nonmetallic, shall be tested in accordance with UL 181. Such connectors shall be listed and labeled as Class 0 or Class 1 flexible air connectors and shall be installed in accordance with Section 304.1.
603.5.2.1 Connector length. Flexible air connectors shall be limited in length to 14 feet (4267).
603.5.3 Air temperature. The design temperature of air to be conveyed in flexible air ducts and flexible air connectors shall be less than 250oF (121oC).
603.5.4 Flexible air duct and air connector clearance. Flexible air ducts and air connectors shall be installed with a minimum clearance to an appliance as specified in the appliance manufacturer’s installation instructions.
603.5.5 Penetrations prohibited. Flexible air ducts and flexible air connectors shall not pass through any fire-resistance-rated assembly. Flexible air connectors shall not pass through any wall, floor or ceiling.
	
Keep 603 FL specific

Mod 979	
.
	§M603.5.6 Flexible Air Duct Systems, Non-Metal. Flexible non-metal ducts shall be joined to all other air distribution system components by either terminal or intermediate fittings.  All duct collar fittings shall have a minimum 5/8 inch integral flange for sealing to other components and a minimum 3 inch shaft for insertion into the inner duct core.

Flexible ducts having porous inner cores shall not be used.
Exception: Ducts having a non-porous liner between the porous inner core and the outer jacket. Fastening and sealing requirements shall be applied to such intermediate liners.

All joints of flexible ducts to fittings and fittings to other air distribution system components shall be mechanically attached and sealed as specified in §M603.5.6.1 through §M603.5.6.6.

§M603.5.6.1 Duct Core to Duct Fitting, Mechanical Attachment. The reinforced core shall be mechanically attached to the duct fitting by a drawband installed directly over the wire-reinforced core and the duct fitting. The duct fitting shall extend a minimum of 2 inches into each section of duct core. When the flexible duct is larger than 12 inches in diameter or the design pressure exceeds 1 inch water gauge, the drawband shall be secured by a raised bead or indented groove on the fitting.

	Keep FL specific	

603.6.4 Flexible air duct and air connector clearance. Flexible air ducts and air connectors shall be installed with a minimum clearance to an appliance as specified in the appliance manufacturer=s installation instructions.
 603.7 Rigid duct penetrations. Duct system penetrations of walls, floors, ceilings and roofs and air transfer openings in such building components shall be protected as required by Section 607.
	
§M603.5.6.2 Duct Core to Duct Fitting, Approved Closure Systems. The reinforced lining shall be sealed to the duct fitting using one of the following sealing materials which conforms to the approved closure and mechanical attachment requirements of §M603.1:
1. Gasketing.
2. Mastic, mastic-plus-embedded fabric, or mastic ribbons.
3. Pressure-sensitive tape.
4. Aerosol sealants, provided that their use is consistent with UL 181.

§M603.5.6.3 Duct Outer Jacket to Duct Collar Fitting. The outer jacket of a flexible duct section shall be secured at the juncture of the air distribution system component and intermediate or terminal fitting in such a way as to prevent excess condensation. The outer jacket of a flexible duct section shall not be interposed between the flange of the duct fitting and the flexible duct, rigid fibrous glass duct board, or sheet metal to which it is mated.

§M603.5.6.4 Duct Collar Fitting to Rigid Duct, Mechanical Attachment. The duct collar fitting shall be mechanically attached to the rigid duct board or sheet metal by appropriate mechanical fasteners, either screws, spin-in flanges, or dovetail flanges.

§M603.5.6.5 Duct Collar Fitting to Rigid Duct, Approved Closure Systems. The duct collar fitting's integral flange shall be sealed to the rigid duct board or sheet metal using one of the following closure systems/materials which conforms to the approved closure and mechanical attachment standards of §M603.1:
1. Gasketing.
2. Mastic or mastic-plus-embedded fabric.
3. Mastic ribbons when used to attach a duct collar to sheet metal.
4. Pressure-sensitive tape.
5. Aerosol sealants, provided that their use is consistent with UL 181.
	
Keep FL specific	
	§M603.5.6.6 Flexible Duct Installation and Support. Flexible ducts shall be configured and supported so as to prevent the use of excess duct material, prevent duct dislocation or damage, and prevent constriction of the duct below the rated duct diameter in accordance with the following requirements:
1. Ducts shall be installed fully extended. The total extended length of duct material shall not exceed 5 percent of the minimum required length for that run.
2. Bends shall maintain a center line radius of not less than one duct diameter.
3. Terminal devices shall be supported independently of the flexible duct.
4. Horizontal duct shall be supported at intervals not greater than 5 feet. Duct sag between supports shall not exceed 1/2 inch per foot of length. Supports shall be provided within 1.5 feet of intermediate fittings and between intermediate fittings and bends. Ceiling joists and rigid duct or equipment may be considered to be supports.
5. Vertical duct shall be stabilized with support straps at intervals not greater than 6 feet.
6. Hangers, saddles and other supports shall meet the duct manufacturer's recommendations and shall be of sufficient width to prevent restriction of the internal duct diameter. In no case shall the material supporting flexible duct that is in direct contact with it be less than 1-1/2 inches wide.

§M603.6 Terminal and Intermediate Fittings. All seams and joints in terminal and intermediate fittings, between fitting subsections and between fittings and other air distribution system components or building components shall be mechanically attached and sealed to 100 percent closure as specified in §M603.6.1 or §M603.6.2.
§M603.6.1 Fittings and Joints Between Dissimilar Duct Types, Approved Closure Systems. Approved closure systems shall be as designated by air distribution system component material type in §M603.1
Exception: When the components of a joint are fibrous glass duct board and metal duct, including collar fittings and metal equipment housings, the closure systems approved for fibrous glass duct shall be used.
§M603.6.2 Terminal Fittings and Air Ducts to Building Envelope Components, Approved Closure Systems. Terminal fittings and air ducts which penetrate the building envelope shall be mechanically attached to the structure and sealed to the envelope component penetrated and shall use one of the following closure systems/materials which conform to the approved closure and mechanical application requirements of §M603.1:
1. Mastics or mastic-plus-embedded fabrics.
2. Gaskets used in terminal fitting/grille assemblies which compress the gasket material between the fitting and the wall, ceiling or floor sheathing.
	Keep FL specific	
	
§M603.7 Air Handling Units. All air handling units shall be mechanically attached to other air distribution system components. Air handling units located outside the conditioned space shall be sealed to 100 percent closure using approved closure systems conforming to the approved closure and mechanical application requirements of §M603.3.

§M603.7.1 Approved Closure Systems. Systems conforming to the product and application standards of §M603.1 may be used when sealing air handling units.
	Keep FL specific	
603.168 Underground ducts. Ducts shall be approved for underground installation. Metallic ducts not having an approved protective coating shall be completely encased in a minimum of 2 inches (51 mm) of concrete.
603.168.1 Slope. Ducts shall slope to allow drainage to a point provided with access.
603.1-603.7
603.168.2 Sealing. Ducts shall be sealed and secured prior to pouring the concrete encasement.
603.168.3 Plastic ducts and fittings. Plastic ducts shall be constructed of PVC having a minimum pipe stiffness of 8 psi (55 kPa) at 5-percent deflection when tested in accordance with ASTM D 2412. Plastic duct fittings shall be constructed of either PVC or high-density polyethylene. Plastic duct and fittings shall be utilized in underground installations only. The maximum design temperature for systems utilizing plastic duct and fittings shall be 150EF (66EC).	

§M603.7.2 Sealing. Ducts shall be sealed and secured prior to pouring the concrete encasement.

	Add IMC 603.8 to code as 603.16	
603.9 -603.12	§M603.8 Cavities of the Building Structure. Cavities in framed spaces, such as dropped soffits and walls, shall not be used to deliver air from or return air to the conditioning system unless they contain an air duct insert which is insulated in accordance with Table 13-410.1.ABC.2.2-4-10 or Table 13-610.1.ABC.2.1 6-10 of Chapter 13 of the Florida Building Code, Building and constructed and sealed in accordance with the requirements of §M603.1 appropriate for the duct materials used.
Exception: Return air plenums.
Cavities designed for air transport such as mechanical closets, chases, air shafts, etc. shall be lined with an air barrier and sealed in accordance with §M603.9 and shall be insulated in accordance with Table 13-410.1.ABC.2.2-4-10 or Table 13-610.1.ABC.2.1-6-10 of Chapter 13 of the Florida Building Code, Building.
Building cavities which will be used as return air plenums shall be lined with a continuous air barrier made of durable non-porous materials. All penetrations to the air barrier shall be sealed with a suitable long-life mastic material.
Exception: Surfaces between the plenum and conditioned spaces from which the return/mixed air is drawn.
Building cavities beneath a roof deck that will be used as return air plenums shall have an insulated roof with the insulation having an R-value of at least R-19.

§M603.9 Mechanical Closets. The interior surfaces of mechanical closets shall be sheathed with a continuous air barrier as specified in §M603.9.1 and shall be sealed to 100 percent closure with approved closure systems as specified in §M603.9.2. All joints shall be sealed between air barrier segments and between the air barriers of walls and those of the ceiling, floor and door framing. All penetrations of the air barrier including, but not limited to, those by air ducts, plenums, pipes, service lines, refrigerant lines, electrical wiring, and condensate drain lines shall be sealed to the air barrier and approved closure systems.
Exception: Air passageways into the closet from conditioned space that are specifically designed for return air flow.
Through-wall, through-floor and through-ceiling air passageways into the closet shall be framed and sealed to form an airtight passageway using approved air duct materials and approved closure systems.
Duct penetrations through any part of the ceiling, walls or floor of a mechanical closet shall have sufficient space between surrounding ceiling, walls or floor and any duct or plenum penetration to allow for sealing of the penetration and inspection of the seal.
Clothes washers, clothes dryers, combustion water heaters and atmospheric combustion furnaces shall not be located in mechanical closets used as return air plenums.

§M603.9.1 Approved Air Barriers. The following air barriers are approved for use in mechanical closets:
1. One-half inch thick or greater gypsum wallboard, taped and sealed.
2. Other panelized materials having inward facing surfaces with an air porosity no greater than that of a duct product meeting Section 22 of UL 181 which are sealed on all interior surfaces to create a continuous air barrier.

§M603.9.2 Approved Closure Systems. The following closure systems are approved for use in mechanical closets:
1. Gypsum wallboard joint compound over taped joints between gypsum wallboard panels.
2. Sealants complying with the product and application standards of §M603.4.2.1 for fibrous glass ductboard;
3. A suitable long-life caulk or mastic compliant with the locally adopted mechanical code for all applications.
	Keep FL specific

	
	§M603.10 Enclosed Support Platforms. Enclosed support platforms located between the return air inlet(s) from conditioned space and the inlet of the air handling unit or furnace, shall contain a duct section constructed entirely of rigid metal, rigid fibrous glass duct board, or flexible duct which is constructed and sealed according to the respective requirements of §M603.1 and insulated according to the requirements of §13-410.1.ABC.2.2-410 and §13-610.1.ABC.2.1-610 of Chapter 13 of the Florida Building Code, Building.

The duct section shall be designed and constructed so that no portion of the building structure, including adjoining walls, floors and ceilings, shall be in contact with the return air stream or function as a component of this duct section.
The duct section shall not be penetrated by a refrigerant line chase, refrigerant line, wiring, pipe or any object other than a component of the air distribution system.
Through-wall, through-floor and through-ceiling penetrations into the duct section shall contain a branch duct which is fabricated of rigid fibrous glass duct board or rigid metal and which extends to and is sealed to both the duct section and the grille side wall surface. The branch duct shall be fabricated and attached to the duct insert in accordance with §M603.3 or §M603.4.2, respective to the duct type used.	Keep FL specific	
[B] 603.1713 Flood hazard areas. For structures in flood hazard areas, ducts shall be located above the design flood elevation or shall be designed and constructed to prevent water from entering or accumulating within the ducts during floods up to the design flood elevation. If the ducts are located below the design flood elevation, the ducts shall be capable of resisting hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to the design flood elevation.	§M603.7.3 Flood hazard. All underground ducts located in a flood-hazard zone or a high-hazard zone shall be located above the base flood elevation or shall be protected so as to prevent water from entering or accumulating within the ducts during floods up to the base flood elevation. If the ducts are located below the base flood elevation, the ducts shall be capable of resisting hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to the base flood elevation.
Floodplain Management Construction Standards. This code specifically defers to the authority granted to local government by Title 44 CFR, sections 59 and 60. This code is not intended to supplant or supercede local ordinances adopted pursuant to that authority, nor are local floodplain management ordinances to be deemed amendments to the code.	Need to refer authority to local government  to be consistent with the FBC-B.	
603.14 Location. Ducts shall not be installed in or within 4 inches (102 mm) of the earth, except where such ducts comply with Section 603.7.

 603.15 Mechanical protection. Ducts installed in locations where they are exposed to mechanical damage by vehicles or from other causes shall be protected by approved barriers.

 603.16 Weather protection. All ducts including linings, coverings and vibration isolation connectors installed on the exterior of the building shall be adequately protected against the elements.

 603.17 Registers, grilles and diffusers. Duct registers, grilles and diffusers shall be installed in accordance with the manufacturer=s installation instructions. Balancing dampers or other means of supply air adjustment shall be provided in the branch ducts or at each individual duct register, grille or diffuser.

603.17.1 Floor registers. Floor registers shall resist, without structural failure, a 200-pound (90.8 kg) concentrated load on a 2-inch-diameter (51 mm) disc applied to the most critical area of the exposed face.	
603.11 Condensation. Provisions shall be made to prevent the formation of condensation on the exterior of any duct.

603.12 Location. Ducts shall not be installed in or within 6 inches (152 mm) of the earth, except where such ducts comply with Section 603.7.

603.13 Mechanical protection. Ducts installed in locations where they are exposed to mechanical damage by vehicles or from other causes shall be protected by approved barriers.
 
603.14 Weather protection. All ducts including linings, coverings and vibration isolation connectors installed on the exterior of the building shall be adequately protected against the elements.

603.15 Registers, grilles and diffusers. Duct registers, grilles and diffusers shall be installed in accordance with the manufacturer=s installation instructions, and shall have a flamespread rating not over 25 without evidence of continued progressive combustion and a smoke developed rating not over 50 when tested in accordance with ASTM E84. Balancing dampers or other means of supply air adjustment shall be provided in the branch ducts or at each individual duct register, grille or diffuser.

603.15.1 Floor registers. Floor registers shall resist, without structural failure, a 200-pound  (90.8 kg)  (890 N) concentrated load on a 2-inch (51 mm) diameter disc applied to the most critical area of the exposed face.	Keep FL specific AS	
606.1	606.1 Controls required.  Air distribution systems shall be equipped with smoke detectors listed and labeled for installation in air distribution systems, as required by this section.
   Exception:  Structures classified as R-3 occupancy type.	Keep Fl 606 in its entirety
AS	
	M606.2 Where required. Smoke detectors shall be installed where indicated in Sections 606.2.1 through 606.2.3 and NFPA 90A-99
M606.2.1 Supply air systems. Smoke detectors shall be installed in supply air systems with a design capacity greater than 2,000 cfm (0.9 m3/s), in the supply air duct.
Exception: Smoke detectors are not required in the supply air system where the space served by the air distribution system is protected by a system of area smoke detectors in accordance with the Florida Building Code, Building. The area smoke detector system shall comply with §M606.4.
M606.2.2  Common supply, return air and supply air systems. Where multiple air-handling systems share common supply or return air ducts or plenums with a combined design capacity greater than 2,000 cfm (0.9 m3/s), the return air and supply air system shall be provided with smoke detectors in accordance with Section 606.2.1.
§M606.2.3 Return and supply risers. Where return air and supply air risers serve two or more stories and are part of a return air and supply air system having a design capacity greater than 15,000 cfm (7.1 m^3/s), smoke detectors shall be installed at each story. Such smoke detectors shall be located upstream of the connection between the return air riser and any air ducts or plenums and between the air supply source and the first branch or take-off to the areas served.
	Keep FL specific	
606	§M606.3 Installation. Smoke detectors required by this section shall be installed in accordance with NFPA 72. The required smoke detectors shall be installed to monitor the entire airflow conveyed by the system including return air, supply air, and exhaust or relief air. Access shall be provided to smoke detectors for inspection and maintenance.
606.4 Controls operation. Upon activation, the smoke detectors shall shut down the air distribution system. Air distribution systems that are part of a smoke control system shall switch to the smoke control mode upon activation of a detector.	Keep Fl 606 in its entirety
AS	
607.1-607.7	606.4.1 Supervision. The duct smoke detectors shall be connected to a fire alarm system. The actuation of a duct smoke detector shall activate a visible and audible supervisory signal at a constantly attended location.
Exceptions:
1. The supervisory signal at a constantly attended location is not required where the duct smoke detector activates the building=s alarm-indicating appliances.
2.In occupancies not required to be equipped with a fire alarm system, actuation of a smoke detector shall activate a visible and an audible signal in an approved location. Duct smoke detector trouble conditions shall activate a visible or audible signal in an approved location and shall be identified as air duct detector trouble.
607.8 6 Location and installation details. The specific location and installation details of each fire door, fire damper, ceiling damper and smoke damper shall be shown and properly identified on the building plans by the designer.

	AS  Use all of 607 IMC’03. Add 607.6 FL as 607.8.	
Chapter 7 COMBUSTION AIR	
SECTION 701 [304 (IFGS)]
COMBUSTION, VENTILATION AND DILUTION AIR

701.1 [304.1] General. Air for combustion, ventilation and dilution of flue gases for gas utilization equipment installed in buildings shall be provided by application of one of the methods prescribed in Sections 702 through 705. Where the requirements of Section 702 are not met, outdoor air shall be introduced in accordance with one of the methods prescribed in Sections 703 through 705. Direct-vent appliances, gas appliances of other than natural draft design and vented gas appliances other than Category I shall be provided with combustion, ventilation and dilution air in accordance with the equipment manufacturer’s instructions.
Exception: Type 1 clothes dryers that are provided with makeup air with an opening having an area of not less than 100 square inches (645 mm2) in the closet enclosure, or by other approved means  in accordance with Section 614.5 [IFGC]. 

701.2 [304.2] Appliance/equipment location. Equipment shall be located so as not to interfere with proper circulation of combustion, ventilation and dilution air.

701.3 [304.3] Draft hood/regulator location. Where used, a draft hood or a barometric draft regulator shall be installed in the same room or enclosure as the equipment served so as to prevent any difference in pressure between the hood or regulator and the combustion air supply.

701.4 [304.4] Makeup air provisions. Makeup air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers and fireplaces shall be considered in determining the adequacy of a space to provide combustion air requirements.	SECTION 701 GENERAL
701.1 Scope. The provisions of Chapter M7 shall apply to fuel burning equipment installed in buildings and that require air for combustion, ventilation, and dilution of flue gases from within the building.
Exceptions: No. 1.: Direct vent equipment that is constructed and installed so that all air for combustion is obtained from the outside atmosphere and all flue gases are discharged to the outside atmosphere.
Exception No. 2.: Enclosed furnaces that incorporate an integral total enclosure and use only outside air for combustion and dilution of flue gases.
701.1.1 Process air. In addition to air needed for combustion, process air shall be provided as required for cooling of equipment or material, controlling dew point, heating, drying, oxidation, dilution, safety exhaust, odor control, and air for compressors.
701.1.2 Ventilation air. In addition to air needed for combustion, air shall be supplied for ventilation, including all air required for comfort and proper working conditions for personnel.
701.1.3 Natural draft. Air for combustion, ventilation, and dilution of flue gases for gas utilization equipment vented by natural draft shall be obtained by application of one of the methods covered in §M703 and §M704.
701.2 Appliance/equipment location. Equipment shall be located so as not to interfere with proper circulation of combustion, ventilation, and dilution air. Where normal infiltration does not provide the necessary air, outside air shall be introduced.
701.3 Draft hood/regulator location. A draft hood or a barometric draft regulator shall be installed in the same room or enclosure as the equipment in such a manner as to prevent any difference in pressure between the hood or regulator and the combustion air supply.
701.4 Makeup air provisions. Air requirements for the operation of exhaust fans, kitchen ventilation systems, clothes dryers, and fireplaces shall be considered in determining the adequacy of a space to provide combustion air requirements.	1/12/04 The TAC voted to replace S. 701 thru 708 FL with sections 304.1 thru 304.12 of the IFGC’03.  Fix section & figure numbering. Leave off IFGC numbers in brackets.	
702.1 [304.5] Indoor combustion air. The required volume of indoor air shall be determined in accordance with Section 702.1.1 [304.5.1] or 702.1.2 [304.5.2], except that where the air infiltration rate is known to be less than 0.40 air changes per hour (ACH), Section 702.1.2 [304.5.2] shall be used. The total required volume shall be the sum of the required volume calculated for all appliances located within the space. Rooms communicating directly with the space in which the appliances are installed through openings not furnished with doors, and through combustion air openings sized and located in accordance with Section 702.1.3 [304.5.3], are considered to be part of the required volume.

702.1.1 [304.5.1] Standard method. The minimum required volume shall be 50 cubic feet per 1,000 Btu/h (4.8 m 3 /kW) of the appliance input rating.

702.1.2 [304.5.2] Known air-infiltration-rate method. Where the air infiltration rate of a structure is known, the minimum required volume shall be determined as follows:
For appliances other than fan-assisted, calculate volume using Equation 3-1.
Required Volume other =..0003  21ft ACH  B hr other 1,/ tu (Equation 3-1)
For fan-assisted appliances, calculate volume using Equation 3-2.
Required Volume fan =..150003ft ACHI B hr fan1,/ tu          (Equation 3-2)
where:
Iother = All appliances other than fan assisted (input in Btu/h).
Ifan = Fan-assisted appliance (input in Btu/h).
ACH = Air change per hour (percent of volume of space exchanged per hour, expressed as a decimal).
For purposes of this calculation, an infiltration rate greater than 0.60 ACH shall not be used in Equations 3-1and 3-2.

702.1.3 [304.5.3] Indoor opening size and location. Openings used to connect indoor spaces shall be sized and located in accordance with Sections 304.5.3.1 and 304.5.3.2 (see Figure 304.5.3).

702.1.3.1 [304.5.3.1] Combining spaces on the same story. Each opening shall have a minimum free area of 1 square inch per 1,000 Btu/h (2,200 mm 2 /kW) of the total input rating of all gas utilization equipment in the space, but not less than 100 square inches (0.06 m 2 ). One opening shall commence within 12 inches (305 mm) of the top and one opening shall commence within 12 inches (305 mm) of the bottom of the enclosure. The minimum dimension of air openings shall be not less than 3 inches (76 mm).
702.1.3.2 [304.5.3.2] Combining spaces in different stories. The volumes of spaces in different stories shall be considered as communicating spaces where such spaces are connected by one or more openings in doors or floors having a total minimum free area of 2 square inches per 1,000 Btu/h (4402 mm 2 /kW) of total input rating of all gas utilization equipment.	SECTION 702
EQUIPMENT LOCATED IN UNCONFINED SPACES.

Equipment located in buildings of unusually tight construction (See definitions in §M202) shall be provided with air for combustion, ventilation, and dilution of flue gases using the methods described in §M703.2, §M704, or §M705.

§M703.1 All Air From Inside the Building. The confined space shall be provided with two permanent openings communicating directly with an additional room(s) of sufficient volume so that the combined volume of all spaces meets the criteria for an unconfined space. The total input of all gas utilization equipment installed in the combined space shall be considered in making this determination. Each opening shall have a minimum free area of 1 square inch per 1,000 Btu per hour (22 cm^2 per kW) of the total input rating of all gas utilization equipment in the confined space, but not less than 100 square inches (645 cm^2). One opening shall commence within 12 inches (30 cm) of the top, and one opening shall commence within 12 inches (30 cm) of the bottom, of the enclosure (see Figure M703.1). The minimum dimension of air openings shall be not less than 3 inches (8 cm).

 FIGURE M703.1

                   EQUIPMENT LOCATED IN CONFINED SPACES;
                      ALL AIR FROM INSIDE THE BUILDING
		
SECTION 703:  OUTDOOR AIR
703.1 [304.6] Outdoor combustion air. Outdoor combustion air shall be provided through opening(s) to the outdoors in accordance with Section 703.1.1 or 703.1.2. The minimum dimension of air openings shall be not less than 3 inches (76 mm).

703.1.1 [304.6.1] Two-permanent-openings method. Two permanent openings, one commencing within 12 inches (305 mm) of the top and one commencing within 12 inches (305 mm) of the bottom of the enclosure, shall be provided. The openings shall communicate directly, or by ducts, with the out-doors or spaces that freely communicate with the outdoors. Where directly communicating with the outdoors, or where communicating with the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 Btu/h (550 mm 2 /kW) of total input rating of all equipment in the enclosure [see Figures 703.1.1(1) and 703.1.1(2)].
Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of not less than 1 square inch per 2,000 Btu/h (1,100 mm 2 /kW) of total input rating of all equipment in the enclosure [see Figure 304.6.1(3)].

703.1.2 [304.6.2] One-permanent-opening method. One permanent opening, commencing within 12 inches (305 mm) of the top of the enclosure, shall be provided. The equipment shall have clearances of at least 1 inch (25 mm) from the sides and back and 6 inches (152 mm) from the front of the appliance. The opening shall directly communicate with the outdoors or through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors[see Figure 703.1.2] and shall have a minimum free area of 1 square inch per 3,000 Btu/h (734 mm 2 /kW) of the total input rating of all equipment located in the enclosure, and not less than the sum of the areas of all vent connectors in the space.	§M703.2 All Air From Outdoors. The confined space shall communicate with the outdoors in accordance with methods 1 or 2. The minimum dimension of air openings shall not be less than 3 in. (8 cm). Where ducts are used, they shall be of the same cross-sectional area as the free area of the openings to which they connect.
1. Two permanent openings, one commencing within 12 inches (30 cm) of the top, and one commencing within 12 inches (30 cm) of the bottom, of the enclosure shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors.
a. Where directly communicating with the outdoors, or where communicating to the outdoors through vertical ducts, each opening shall have a minimum free area of 1 square inch per 4,000 Btu per hour (5.5 cm^2 per kW) of total input rating of all equipment in the enclosure. (See Figure M703.2(a) and Figure M703.2(b).)
b. Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of 1 square inch per 2,000 Btu per hour (11 cm^2 per kW) of total input rating of all equipment in the enclosure. (See Figure M703.2(c).)
2. One permanent opening, commencing within 12 in. (30 cm) of the top of the enclosure, shall be permitted where the equipment has clearances of at least 1 in. (2.5 cm) from the sides and back and 6 in. (16 cm) from the front of the appliance. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces (crawl or attic) that freely communicate with the outdoors, and shall have a minimum free area of:
a. 1 sq in per 3000 Btu per hr (7 cm^2 per kW) of the total input rating of all equipment located in the enclosure, and 
b. Not less than the sum of the areas of all vent connectors in the confined space. (See Figure M703.2(d)).		
SECTION 704. COMBINED USE OF INSIDE AND OUTDOOR AIR

704.1 [304.7] Combination indoor and outdoor combustion air. The use of a combination of indoor and outdoor combustion air shall be in accordance with Sections 704.1.1 through 704.1.3.

704.1.1 [304.7.1] Indoor openings. Where used, openings connecting the interior spaces shall comply with Section 702.1.3.

704.1.2 [304.7.2] Outdoor opening location. Outdoor opening(s) shall be located in accordance with Section 703.1.

704.1.3 [304.7.3] Outdoor opening(s) size. The outdoor opening(s) size shall be calculated in accordance with the following:
1. The ratio of interior spaces shall be the available volume of all communicating spaces divided by the required volume.
2. The outdoor size reduction factor shall be one minus the ratio of interior spaces.
3. The minimum size of outdoor opening(s) shall be the full size of outdoor opening(s) calculated in accordance with Section 703.1, multiplied by the reduction factor. The minimum dimension of air openings shall be not less than 3 inches (76 mm).

	SECTION M704 COMBINATION OF AIR FROM INSIDE AND FROM OUTDOORS.  Where the building in which the fuel-burning appliances are located is not unusually tight construction and the communicating interior spaces containing the fuel-burning appliances comply with all of the requirements of §M703.1, except the volumetric requirement of §M703.1, required combustion and dilution air shall be obtained by opening the room to the outdoors utilizing a combination of inside and outdoor air prorated in accordance with §M704.6. Openings connecting the interior spaces shall comply with §M703.1. The ratio of interior spaces shall comply with §M704.5. The number, location and ratios of openings connecting the space with the outdoor air shall comply with §M704.1 through §M704.4.
§M704.1 Number and location of openings. At least two openings shall be provided, one within 1 foot (305 mm) of the ceiling of the room and one within 1 foot (305 mm) of the floor.
§M704.2 Ratio of direct openings. Where direct openings to the outdoors are provided in accordance with §M703.2, method 1a, the ratio of direct openings shall be the sum of the net free areas of both direct openings to the outdoors, divided by the sum of the required areas for both such openings as determined in accordance with §M703.2, method 1a.
§M704.3 Ratio of horizontal openings. Where openings connected to the outdoors through horizontal ducts are provided in accordance with §M703.2, method 1b, the ratio of horizontal openings shall be the sum of the net free areas of both such openings, divided by the sum of the required areas for both such openings as determined in accordance with §M703.2, method 1b.

§M704.4 Ratio of vertical openings. Where openings connected to the outdoors through vertical ducts are provided in accordance with §M703.2, method 1a, the ratio of vertical openings shall be the sum of the net free areas of both such openings, divided by the sum of the required areas for both such openings as determined in accordance with §M703.2, method 1a.

§M704.5 Ratio of interior spaces. The ratio of interior spaces shall be the available volume of all communicating spaces, divided by the required volume as determined in accordance with §M703.1.

§M704.6 Prorating of inside and outdoor air. In spaces that utilize a combination of inside and outdoor air, the sum of the ratios of all direct openings, horizontal openings, vertical openings and interior spaces shall equal or exceed 1.
		
704.2 [304.8] Engineered installations. Engineered combustion air installations shall provide an adequate supply of combustion, ventilation and dilution air and shall be approved.
	SECTION M705: SPECIALLY ENGINEERED INSTALLATIONS
The requirements of §M703 shall be permitted to be waived where special engineering, approved by the authority having jurisdiction, provides an adequate supply of air for combustion, ventilation, and dilution of flue gases.		
706.1 [304.11] Combustion Air Ducts. Combustion air ducts shall comply with all of the following:
1. Ducts shall be of galvanized steel complying with Chapter 6 of this code the International Mechanical Code or of equivalent corrosion-resistant material approved for this application.
Exception: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one required fireblock is removed.
2. Ducts shall terminate in an unobstructed space allowing free movement of combustion air to the appliances.
3. Ducts shall serve a single enclosure.
4.Ducts shall not serve both upper& lower combustion air openings where both such openings are used. The separation between ducts serving upper and lower combustion air openings shall be maintained to the source of combustion air.
5. Ducts shall not be screened where terminating in an attic space.
6. Horizontal upper combustion air ducts shall not slope downward toward the source of combustion air.
7. The remaining space surrounding a chimney liner, gas vent, special gas vent or plastic piping installed within a masonry, metal or factory-built chimney shall not be used to supply combustion air.
Exception: Direct-vent gas-fired appliances designed for installation in a solid fuel-burning fireplace where installed in accordance with the listing and the manufacturer’s instructions.
8. Combustion air intake openings located on the exterior of a building shall have the lowest side of such openings located not less than 12 inches (305 mm) vertically from the adjoining grade.
707.1 [304.10] Louvers and Grilles. The required size of openings for combustion, ventilation and dilution air shall be based on the net free area of each opening. Where the free area through a design of louver, or grille or screen is known, it shall be used in calculating the size opening required to provide the free area specified. Where the design and free area of louvers and grilles are not known, it shall be assumed that wood louvers will have 25-percent free area and metal louvers and grilles will have 75-percent free area. Screens shall have a mesh sizes not smaller than ¼”.  Non-motorized louvers and grilles shall be fixed in the open position.
707.2 Motorized louver interlock. Motorized louvers shall be interlocked with the equipment so that they are proven to be in the full open position prior to main burner ignition and during main burner operation. Means shall be provided to prevent the main burner from igniting if the louvers fail to open during burner start-up and to shut down the main burner if the louvers close during operation.	SECTION M707: COMBUSTION AIR DUCTS
Combustion air ducts shall comply with (1) through (5).
1. Be of galvanized steel complying with Chapter M6 or of equivalent corrosion-resistant material approved for this application.
EXCEPTION: Within dwellings units, unobstructed stud and joist spaces shall not be prohibited from conveying combustion air, provided that not more than one required fireblock is removed.
2. Terminate in an unobstructed space allowing free movement of combustion air to the appliances.
3. Serve a single enclosure.
4. Not serve both upper and lower combustion air openings where both such openings are used. The separation between ducts serving upper and lower combustion air openings shall be maintained to the source of combustion air.
5. Not be screened where terminating in an attic space.

SECTION M706: LOUVERS AND GRILLES
In calculating free area in §M703, consideration shall be given to the blocking effect of louvers, grilles, or screens protecting openings. If the free area through a design of louver or grille is known, it shall be used in calculating the size opening required to provide the free area specified. If the design and free area are not known, it shall be assumed that wood louvers will have 20-25 percent free area and metal louvers and grilles will have 60-75 percent free area. Louvers and grilles shall be fixed in the open position or interlocked with the equipment so that they are opened automatically during equipment operation.

SECTION 708 [305 IFGC]: INSTALLATION
708.1 [305.1] General. Equipment and appliances shall be installed as required by the terms of their approval, in accordance with the conditions of listing, the manufacturer’s instructions and this code. Manufacturers’ installation instructions shall be available on the job site at the time of inspection. Where a code provision is less restrictive than the conditions of the listing of the equipment or appliance or the manufacturer’s installation instructions, the conditions of the listing and the manufacturer’s installation instructions shall apply. Unlisted appliances approved in accordance with Section 301.3 shall be limited to uses recommended by the manufacturer & shall be installed in accordance with the manufacturer’s instructions, the provisions of this code and the requirements determined by the code official..

SECTION 709 : OPENING LOCATION AND PROTECTION
709.1 [304.12] Protection from fumes and gases. Where corrosive or flammable process fumes or gases, other than products of combustion, are present, means for the disposal of such fumes or gases shall be provided. Such fumes or gases include carbon monoxide, hydrogen sulfide, ammonia, chlorine and halogenated hydrocarbons. In barbershops, beauty shops and other facilities where chemicals that generate corrosive or flammable products, such as aerosol sprays, are routinely used, non-direct-vent-type appliances shall be located in an equipment room separated or partitioned off from other areas with provisions for combustion air and dilution air from the outdoors. Direct-vent appliances shall be installed in accordance with the appliance manufacturer's installation instructions.
FIGURE 304.5.3:   All Air From Inside the Building (see Section 304.5.3)

FIGURE 304.6.1(1):  All Air From Outdoors—Inlet Air From Ventilated Crawl Space and Outlet Air to Ventilated Attic (see Section 304.6.1)

FIGURE 304.6.1(2): All Air from Outdoors Through Ventilated Attic (see Section 304.6.1)	
SECTION M708: INSTALLATION
§M708.1 Installation/Instructions. Appliances shall be installed in accordance with the manufacturer's installation instructions which shall be available on the job site at the time of inspection.

§M708.2 Public Garages/Parking Structures. Appliances shall be installed in accordance with the manufacturer's instructions and NFPA 88B.

FIGURE M703.2(A):  Equipment Located In Confined Spaces; All Air From Outdoors – Inlet  Air From Ventilated Crawl Space And Outlet Air To Ventilated Attic

FIGURE M703.2(B):  Equipment Located In Confined Spaces; All Air From Outdoors Through Ventilated Attic

 FIGURE M703.2(C):  Equipment Located in Confined Spaces; All Air From Outdoors

 FIGURE M703.2(D):  Equipment Located in Confined Spaces; All Air From Outdoors.  (One Opening)		
Chapter 8 CHIMNEYS AND VENTS	
801.1 Scope. This chapter shall govern the installation, maintenance, repair and approval of factory-built chimneys, chimney lin3ers, vents and connectors. This chapter shall also govern the utilization of masonry chimneys. Gas-fired appliances shall be vented in accordance with the International Fuel Gas Code.	§M801.1 Scope. This chapter shall govern the installation, maintenance, repair and approval of factory-built chimneys, chimney liners, vents and connectors. This chapter shall also govern the utilization of masonry chimneys. Gas-fired appliances shall be vented in accordance with the Florida Building Code, Fuel Gas. Unless otherwise stated in this code, chimneys, fireplaces, vents and solid fuel-burning appliances shall comply with NFPA 211.		
	§M801.2120 Fans. The return and exhaust fans shall be arranged so that any negative pressure produced will not affect the appliance venting.		
908.1 General. A cooling tower used in conjunction with an air-conditioning appliance shall be installed in accordance with the manufacturer's installation instructions.	§M908.1 General. A cooling tower used in conjunction with an air-conditioning appliance shall be installed in accordance with the manufacturer's installation instructions. The design of such cooling tower shall be in accordance with the requirements of the Florida Building Code, Building for a structure. Unless otherwise stated in this code, water cooling towers shall comply with NFPA 214.	Keep 908.1 FL
AS	
Chapter 9 SPECIFIC APPLIANCES, FIREPLACES AND SOLID FUEL-BURNING EQUIPMENT	
	918.6 Prohibited sources. Outside or return air for a forced-air mechanical heating system shall not be taken from the following locations:  [rest: no change]		
Not in the IMC ’03.	926  RESIDENTIAL RADIANT HEATING SYSTEMS
926.1  General. Electric radiant heating systems shall be installed in accordance with the manufacturer's installation instructions and Chapter 27 of the Florida Building Code.
926.2  Clearances. Clearances for radiant heating panels or elements to any wiring, outlet boxes and junction boxes used for installing electrical devices or mounting lighting fixtures shall comply with Chapter 27 of the Florida Building Code.
926.3  Installation of radiant panels. Radiant panels installed on wood framing shall conform to the following requirements:
1. Heating panels shall be installed parallel to framing members and secured to the surface of framing members or mounted between framing members.
2. Panels shall be nailed or stapled only through the unheated portions provided for this purpose and shall not be fastened at any point closer than 1/4 inch (6.4 mm) from an element.
3. Unless listed and labeled for field cutting, heating panels shall be installed as complete units.
926.4  Installation in concrete or masonry. Radiant heating systems installed in concrete or masonry shall conform to the following requirements:
1. Radiant heating systems shall be identified as being suitable for the installation, and shall be secured in place, as specified in the manufacturer's installation instructions.
2. Radiant heating panels or radiant heating panel sets shall not be installed where they bridge expansion joints unless protected from expansion and contraction.
926.5 Gypsum panels. Where radiant heating systems are used on gypsum assemblies, operating temperatures shall not exceed 125°F (52°C).
926.6	Finish surfaces. Finish materials installed over radiant heating panels or systems shall be installed in accordance with the manufacturer's installation instructions. Surfaces shall be secured so that nails or other fastenings do not pierce the radiant heating elements.
927  RESIDENTIAL ELECTRIC DUCT HEATERS
927.1  General. Electric duct heaters shall be installed in accordance with the manufacturer's installation instructions and Chapter 27 of this code. Electric furnaces shall be tested in accordance with UL 1995.
927.2	Installation. Electric duct heaters shall be installed so that they will not create a fire hazard. Class 1 ducts, duct coverings and linings shall be interrupted at each heater to provide the clearances specified in the manufacturer's installation instructions. Such interruptions are not required for duct heaters listed and labeled for zero clearance to combustible materials. Insulation installed in the immediate area of each heater shall be classified for the maximum temperature produced on the duct surface.
927.3  Installation with heat pumps and air conditioners. Duct heaters located within 4 feet (1219 mm) of a heat pump or air conditioner shall be listed and labeled for such installations. The heat pump or air conditioner shall additionally be listed and labeled for such duct heater installations.
927.4  Access. Duct heaters shall be accessible for servicing, and clearance shall be maintained to permit adjustment, servicing and replacement of controls and heating elements.
927.5  Fan interlock. The fan circuit shall be provided with an interlock to prevent heater operation when the fan is not operating.	Keep 926-930 FL.
AS
Note:  This all came from the IRC. By adopting the IRC, these may not be needed in the FBC-M.	
	928  VENTED RESIDENTIAL FLOOR FURNACES
928.1  General. Vented floor furnaces shall conform to ANSI/UL 729 and be installed in accordance with their listing, the manufacturer's installation instructions and the requirements of this code.
928.2  Clearances. Vented floor furnaces shall be installed in accordance with their listing and the manufacturer's installation instructions.
928.3 Location. Location of floor furnaces shall conform to the following requirements:
1. Floor registers of floor furnaces shall be installed not less than 6 inches (152 mm) from a wall.
2. Wall registers of floor furnaces shall be installed not less than 6 inches (152 mm) from the adjoining wall at inside corners.
3. The furnace register shall be located not less than 12 inches (305 mm) from doors in any position, draperies or similar combustible objects.
4. The furnace register shall be located at least 5 feet (1524 mm) below any projecting combustible materials.
5. The floor furnace burner assembly shall not project into an occupied under-floor area.
6. The floor furnace shall not be installed in concrete floor construction built on grade.
7. The floor furnace shall not be installed where a door can swing within 12 inches (305 mm) of the grill opening.
928.4  Access. An opening in the foundation not less than 18 inches by 24 inches (457 mm by 610 mm), or a trap door not less than 22 inches by 30 inches (559 mm by 762 mm) shall be provided for access to a floor furnace. The opening and passageway shall be large enough to allow replacement of any part of the equipment.
928.5  Installation. Floor furnace installations shall conform to the following requirements:
1. Thermostats controlling floor furnaces shall be located in the room in which the register of the floor furnace is located.
2. Floor furnaces shall be supported independently of the furnace floor register.
3. Floor furnaces shall be installed not closer than 6 inches (152 mm) to the ground. Clearance may be reduced to 2 inches (51 mm), provided that the lower 6 inches (152 mm) of the furnace is sealed to prevent water entry.
4. Where excavation is required for a floor furnace installation, the excavation shall extend 30 inches (762 mm) beyond the control side of the floor furnace and 12 inches (305 mm) beyond the remaining sides. Excavations shall slope outward from the perimeter of the base of the excavation to the surrounding grade at an angle not exceeding 45 degrees (0.39 rad) from horizontal.
5. Floor furnaces shall not be supported from the ground.		
	929   VENTED RESIDENTIAL WALL FURNACES
929.1  General. Vented wall furnaces shall conform to ANSI/UL 730 and be installed in accordance with their listing, the manufacturer's installation instructions and the requirements of this code.
929.2  Location. The location of vented wall furnaces shall conform to the following requirements:
1. 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.
2. Vented wall furnaces shall not be located where a door can swing within 12 inches (305 mm) of the furnace air inlet or outlet measured at right angles to the opening. Doorstops or door closers shall not be installed to obtain this clearance.
929.3  Installation. Vented wall furnace installations shall conform to the following requirements:
1. Required wall thicknesses shall be in accordance with the manufacturer's installation instructions.
2. Ducts shall not be attached to a wall furnace. Casing extensions or boots shall only be installed when listed as part of a listed and labeled appliance.
3. A manual shut off valve shall be installed ahead of all controls.
929.4  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 must be removed for normal servicing operations shall not be attached to the building construction.
930  VENTED RESIDENTIAL ROOM HEATERS
930.1  General. Vented room heaters shall be tested in accordance with UL 1482 or UL 896 and installed in accordance with their listing, the manufacturer's installation instructions and the requirements of this code.
930.2  Floor mounting. Room heaters shall be installed on noncombustible floors or approved assemblies constructed of noncombustible materials that extend at least 18 inches(457 mm) beyond the appliance on all sides.
Exceptions:
1. Listed room heaters shall be installed on noncombustible floors, assemblies constructed of noncombustible materials or listed floor protectors with materials and dimensions in accordance with the appliance manufacturer's instructions.
2. Room heaters listed for installation on combustible floors without floor protection shall be installed in accordance with the appliance manufacturer's instructions	Keep 926-930 FL (IRC)	
Chapter 10  BOILERS, WATER HEATERS AND PRESSURE VESSELS	
1001.1 Scope. This chapter shall govern the installation, alteration and repair of boilers, water heaters and pressure vessels.
EXCEPTIONS:   1. – 7. Unchanged	§M1001.1 Scope. This chapter shall govern the installation, alteration and repair of boilers, water heaters and pressure vessels.
EXCEPTIONS:   1. – 7. Unchanged. 
8. Boiler or pressure vessels subject to inspection as provided in the Florida Statutes 554-Boiler Safety Act, administered by the Boiler Safety Program, State Fire Marshal's Office.	Keep FL 1001.1 
AS
Keep exception 8.	
1002.1 General. Potable water heaters and hot water storage tanks shall be listed and labeled and installed in accordance with the manufacturer=s installation instructions, the International Plumbing Code and this code. All water heaters shall be capable of being removed without first removing a permanent portion of the building structure. The potable water connections and relief valves for all water heaters shall conform to the requirements of the International Plumbing Code. Domestic electric water heaters shall comply with UL 174 or UL 1453. Commercial electric water heaters shall comply with UL 1453. Oil-fired water heaters shall comply with UL 732.	§M1002.1 General. Non-potable water heaters and hot water storage tanks shall be designed and stamped under ANSI Z10.1, ANSI Z10.3, ASME Boiler and Pressure Vessel Code Section IV code or shall be listed and labeled in accordance with national standards, and installed in accordance with the manufacturer's installation instructions, and this code. All water heaters shall be capable of being removed without first removing a permanent portion of the building structure. The potable water connections and relief valves for all water heaters shall conform to the requirements of the Florida Building Code, Plumbing.
	Keep FL specific 	
003.1 General. All pressure vessels shall bear the label of an approved agency and shall be installed in accordance with the manufacturer=s installation instructions.	§M1003.1 General. All pressure vessels shall bear the label of an approved agency and shall be installed in accordance with the manufacturer's installation instructions. Pressure vessels shall be designed and stamped per ASME Boiler and Pressure Vessel Code Section VIII-Division 1, Division 2. or Division 3, 1998 edition, 1999 addenda and interpretation.		
Chapter 11  REFRIGERATION	
1107.2 Pipe enclosures. [OK ]	§M1107.2.1 Piping installed in or beneath concrete floors shall be encased in pipe duct.  Where piping passes through concrete or masonry walls, ceilings, floors or beams, such piping shall be provided with metal sleeves or thimbles which shall be at least 3/8 inch (9.5 mm) larger than the outside diameter of the piping plus the insulation.  All voids between piping and casing shall be adequately enclosed with an approved material.		
Chapter 12  HYDRONIC PIPING	
1206.1.1 Prohibited tee applications. Fluid in the 
supply side of a hydronic system shall not enter a tee fitting through the branch opening.		AM	
Chapter 15 REFERENCED STANDARDS	[Update all standards]	Mod 971r  AM