Nfpa 90b pdf

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ISBN: (PDF). IMPORTANT NOTICES AND DISCLAIMERS CONCERNING NFPA® STANDARDS. NOTICE AND DISCLAIMER OF LIABILITY . NFPA90BNFPA 90B Standard for the Installation of Warm Air Heating and Standards PDF Cover Page Apply the latest edition of NFPA 90B. Depend. The National Fire Protection Association (NFPA) is a non-profit organization Products* meet the requirements of NFPA 90B which requires a 25/50 flame.


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This edition of NFPA 90B, Standard for the Installation of Warm Air Heating and Prior to , the subject of air conditioning was covered in NFPA standards. NFPA 90B provides requirements that cover the construction, installation, operation, and maintenance of systems for Buy NFPA 90B Second Draft ( PDF). NFPA 90B, Standard for the Installation of Warm Air Heating and Air-Conditioning Systems, Edition. NFPA STANDARDS DEVELOPMENT.

The installation of electrical wiring and equipment detectors required by the provisions of Section 6. All surfaces, including those that would be openings through which a Skip to main content. This standard shall cover construction, installation, operation, and maintenance of systems for warm air heating and air conditioning, including filters, ducts, and related equipment to protect life and property from fire, smoke, and gases resulting from fire or from conditions having manifestations similar to fire. Some such devices are listed in Heating and Air-Conditioning Systems. Print Save Email.

Already Subscribed to this document. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. PDF Price. Need more than one copy? Not a Member? This standard is not included in any packages. We have no amendments or corrections for this standard. Request Proposal Price. Proceed to Checkout Continue Shopping.

Useful Links. Straniero Thomas M. Papagni Contractors Natl. Hall, Air Products and Controls Inc. Howard, III Alt. Orris Alt. Koerber Robert J. Hirschler Alt. Since that time, changes in the membership may have occurred. A key to classifications is found at the back of the document.

Membership on a committee shall not in and of itself constitute an endorsement of the Association or any document developed by the committee on which the member serves. Committee Scope: This Committee shall have primary responsibility for documents on the construction, installation, operation, and maintenance of systems for air conditioning, warm air heating, and ventilating including filters, ducts, and related equipment to protect life and property from fire, smoke, and gases resulting from fire or from conditions having manifestations similar to fire.

This standard shall apply to all systems for the movement of environmental air in structures that serve the fol- Standard for the lowing: This NFPA document is made available for use subject to important notices and legal disclaimers. These notices 1.

The provisions of this standard shall not be and disclaimers appear in all publications containing this document intended to be applied retroactively. These rules are included as an aid to the user in identifying changes from the previous edition. The documents or portions thereof listed in this A reference in brackets [ ] following a section or paragraph chapter are referenced within this standard and shall be con- indicates material that has been extracted from another NFPA sidered part of the requirements of this document.

As an aid to the user, the complete title and edition 2. Extracted text edition. Equipment, edition. This standard shall cover construction, installation, NFPA , Standard for Smoke Door Assemblies and Other Open- operation, and maintenance of systems for air conditioning and ing Protectives, edition.

American Society of Heating, and floor— or roof—ceiling assemblies affected by the in- Refrigerating and Air-Conditioning Engineers, Inc. PA Martens Closed Cup Tester, Air-Handling Spaces, Fuel—Burning Appliances, edition.

Pdf nfpa 90b

The definitions contained in this chapter shall ap- 2. Sheet Metal and Air Condition- ply to the terms used in this standard. Underwriters Laboratories Inc. An organization, Air Connectors, , Revised Rigid Air Ducts, , Revised Indicates a mandatory requirement. Indicates a recommendation or that which is vised A document, the main text of which contains istics of Building Materials, , Revised Air that is supplied, returned, recir- culated, or exhausted from spaces for the purpose of modifying 3.

Capable of being removed or exposed with- the existing atmosphere within the building. A blower or exhauster assembly comprising blades or runners and housings or casings. A device used to reduce or remove airborne solids from heating, ventilating, and air-conditioning systems by 3. The time, in minutes or hours, electrostatic means. A continuous passageway for the 3.

A wall separating buildings or subdividing a transmission of air that, in addition to air ducts, can include air building to prevent the spread of fire and having a fire resistance connectors, air duct fittings, dampers, plenums, fans, and acces- rating and structural stability.

A comparative measure expressed as a dimensionless number derived from visual measurements or 3. A conduit or passageway for conveying air to or the spread of flame versus time in ASTM E 84, Standard Test from heating, cooling, air-conditioning, or ventilating equip- Method for Surface Burning Characteristics of Building Materials, or ment, but not including the plenum.

NFPA 90B: Standard for the Installation of Warm Air Heating and Air-Conditioning Systems

A material such as an adhesive, insu- Building Materials. A cellular plastic, used for ther- outside surface of an air duct, fan casing, or duct plenum. Refers to a building 3. A device used to reduce or remove airborne construction material not complying with the definition of non- solids from heating, ventilating, and air-conditioning systems. Any opening through which air is removed for Potential Heat of Building Materials and that includes either of from a space and returned to an air distribution system.

Any opening through which air is deliv- bustible material, with a surfacing not exceeding a thickness of ered to a space from an air distribution system. An appliance receiving, condi- flame spread index greater than 25 nor evidence of continued tioning, and delivering air supplied through an air distribu- progressive combustion, and of such composition that surfaces tion system. An opening designed to allow plane would have neither a flame spread index greater than 25 the movement of environmental air between two contiguous nor evidence of continued progressive combustion when tested spaces.

A listed device installed in a ceil- noncombustible materials. A device that 3. An individual meets both fire damper and smoke damper requirements. A device installed in an air distribu- from various sources and combine the air within the room tion system and designed to close automatically upon detec- before returning it to the air-handling unit.

A sheet metal construc- passage of flame. A device within an air-distribution handling unit, or furnace bonnet for the purpose of con- system to control the movement of smoke. The space between the top 4. The airborne solid and liquid particulates and 4. Cup Tester.

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A continuous membrane, or a mem- 4. A device that senses visible or invis- 4. A comparative measure ex- 4. Fans shall be located, arranged, and installed Characteristics of Building Materials.

Exposed fan inlets shall be protected with metal screens to prevent the entry of paper, trash, and Chapter 4 HVAC Systems foreign materials. Equipment shall be arranged to afford access for 4. See 4. Materials used in the manufacturing of fan 4. See Section 6. Combustible evaporation media 4. Equipment not covered by shall not be required to conform to the provisions for air ducts other provisions of this standard and used for heat transfer or where they meet the requirements of 4.

Pipe and duct insulation and coverings, duct linings and their 4. Materials to Assess Surface Burning Characteristics. Safety Factory-Made Air Ducts and Air Connectors, shall have been tested, listed, and used in accordance with the conditions of 4. Such occu- pancies include banks, office buildings, churches, hotels, 4. Air supplied to any space shall not contain only the floor immediately below the roof shall be exempt flammable vapors, flyings, or dust in quantities and concentra- from the requirements of 4.

Air outlets shall be con- structed of noncombustible material or of a material that has a 4. Where cables are identi- Burning Characteristics of Building Materials. The space between the top of 4. Air inlets shall be con- structed of noncombustible material or a material that has a 4. All surfaces, including those that would be openings through which a Where cables are identified for Test for Surface Burning Characteristics of Building Materials, at for future use with a tag, the tag shall be of sufficient durability to full width of the tunnel and with no water or any other liquid withstand the environment involved.

Cables installed less, when tested in accordance with ASTM E 84, Standard Test within these raceways shall be listed as plenum cable in accor- Method for Surface Burning Characteristics of Building Materials, or dance with the requirements in 4. Exit passageways, stairs, ramps, and other exits 5 The total smoke release does not exceed m2 yd2 shall not be used as a part of a supply, return, or exhaust air when tested in accordance with NFPA , Standard Methods system serving other areas of the building.

Where a smoke-control or exhaust rior Finish to Room Fire Growth where the testing shall be per- system is required, it shall conform to the requirements of the formed on the finished foam plastic assembly related to the building code of the authority having jurisdiction.

Other spaces ties, detention and correctional, and residential occupancies housing air-handling units shall meet the requirements of the shall not be used as a portion of a supply, return, or exhaust air building code of the authority having jurisdiction. The installation of air ducts, in- 5. Where the installation of the hang- etrates the floor, an air duct enclosure shall not be required.

90b pdf nfpa

The installation of electrical wiring and equipment detectors required by the provisions of Section 6. Electrical Code. All automatic shutdown devices shall be tested needed in order to restrict the spread of fire and smoke. This annex contains cally stop their respective fans. ANNEX A 90A—17 air duct system is essential to safety to life and the protection of or his or her designated agent assumes the role of the authority property. The means for identifying listed equipment may Pertinent information on maintenance is provided in vary for each organization concerned with product evaluation; Annex B.

For limitations on the tion and whose environmental air does not mix with that of any other space. For further discussion of various types of air Heating and Air-Conditioning Systems. A comparative measure ex- 4. Fans shall be located, arranged, and installed Characteristics of Building Materials. Exposed fan inlets shall be protected with metal screens to prevent the entry of paper, trash, and Chapter 4 HVAC Systems foreign materials. Equipment shall be arranged to afford access for 4.

See 4. Materials used in the manufacturing of fan 4. See Section 6. Combustible evaporation media 4. Equipment not covered by shall not be required to conform to the provisions for air ducts other provisions of this standard and used for heat transfer or where they meet the requirements of 4. Pipe and duct insulation and coverings, duct linings and their 4.

Pdf nfpa 90b

Materials to Assess Surface Burning Characteristics. Safety Factory-Made Air Ducts and Air Connectors, shall have been tested, listed, and used in accordance with the conditions of 4. Such occu- pancies include banks, office buildings, churches, hotels, 4. Air supplied to any space shall not contain only the floor immediately below the roof shall be exempt flammable vapors, flyings, or dust in quantities and concentra- from the requirements of 4.

Air outlets shall be con- structed of noncombustible material or of a material that has a 4. Where cables are identi- Burning Characteristics of Building Materials. The space between the top of 4. Air inlets shall be con- structed of noncombustible material or a material that has a 4.

All surfaces, including those that would be openings through which a Where cables are identified for Test for Surface Burning Characteristics of Building Materials, at for future use with a tag, the tag shall be of sufficient durability to full width of the tunnel and with no water or any other liquid withstand the environment involved.

Cables installed less, when tested in accordance with ASTM E 84, Standard Test within these raceways shall be listed as plenum cable in accor- Method for Surface Burning Characteristics of Building Materials, or dance with the requirements in 4. Exit passageways, stairs, ramps, and other exits 5 The total smoke release does not exceed m2 yd2 shall not be used as a part of a supply, return, or exhaust air when tested in accordance with NFPA , Standard Methods system serving other areas of the building.

Where a smoke-control or exhaust rior Finish to Room Fire Growth where the testing shall be per- system is required, it shall conform to the requirements of the formed on the finished foam plastic assembly related to the building code of the authority having jurisdiction. Other spaces ties, detention and correctional, and residential occupancies housing air-handling units shall meet the requirements of the shall not be used as a portion of a supply, return, or exhaust air building code of the authority having jurisdiction.

The installation of air ducts, in- 5. Where the installation of the hang- etrates the floor, an air duct enclosure shall not be required.

The installation of electrical wiring and equipment detectors required by the provisions of Section 6.

Electrical Code. All automatic shutdown devices shall be tested needed in order to restrict the spread of fire and smoke. This annex contains cally stop their respective fans. ANNEX A 90A—17 air duct system is essential to safety to life and the protection of or his or her designated agent assumes the role of the authority property. The means for identifying listed equipment may Pertinent information on maintenance is provided in vary for each organization concerned with product evaluation; Annex B.

For limitations on the tion and whose environmental air does not mix with that of any other space. For further discussion of various types of air Heating and Air-Conditioning Systems.

For further discussion of various types of air A. Some such devices are listed in Heating and Air-Conditioning Systems. The National Fire Protection Association chanically induced airflow. In determining the acceptability of cations EMME. The authority having jurisdic- A. Flame spread indexes for some tion may also refer to the listings or labeling practices of an materials are listed in UL Building Materials Directory.

Classifica- organization that is concerned with product evaluations and is tions have been developed using flame spread index values. Material subject to standards for the current production of listed items.

In many circumstances, the property owner is considered a noncombustible material. A plenum can be one of the following five A.

Any plenum at any point on the dis- A. Any plenum at any point on the intake side A. Where the size of the duct permits, the mini- complete or partial return to the same space or spaces. If feasible, the underside of its ventilation system s. Any plenum at any point on the intake Many fire dampers and smoke dampers are preloaded with side of a fan through which air is intentionally conveyed powerful springs that force the damper to shut.

These damp- from a space or spaces within the building and from the ers need to be opened against these springs, which could ne- exterior of the building to the fan for eventual complete cessitate the ability to get two arms into the duct. A smoke barrier might be vertically installed in metal raceways or metal sheathed cable are not or horizontally aligned, such as a wall, floor, or ceiling assem- considered to be exposed to the airflow and need not meet bly.

A smoke barrier might or might not have a fire resistance the requirements of 4. Electrical wires and cables and rating. Marked Limited Combustible, are considered to be suitable for A. The location A. Where practical, installation locations and meth- cables installed in metal raceways without an overall nonme- ods that anticipate and facilitate the removal of such materials tallic covering, metal sheathed cable without an overall non- should be selected.

It requires that the entire system that is used in the field be tested, including the insulation itself, any adhesive, A. The practice recognizes that pipe or cables listed to UL Subject , Outline of Investigation for Cable duct insulation systems can comprise a single product or of a Marked Limited Combustible, are considered to be suitable for combination of products, and that these systems have a variety use wherever cables tested in accordance with NFPA , Stan- of physical characteristics, including that they may or may not dard Method of Test for Flame Travel and Smoke of Wires and Cables be self-supporting.

Smoke Control Systems. Fire damp- A. It is late specific hazards. The dynamic airflow and pres- A. The damper face velocity and closure pressure can be approximated A.

Pdf nfpa 90b

System A can be used only when it is specified in the individual design. System B can be used in any A. The the ductwork collapses during a fire. To accomplish this, duct- systems have been investigated for their effectiveness in retard- work should not be continuous through a partition opening but Fire-rated roof-ceiling assembly FD 24 FD, see 5.

FD, See 5. The access openings required in 4. For specific details regarding sleeve thickness, pe- checked for proper location, function, and size during the rimeter angle dimensions, size and frequency of fasteners, clear- acceptance testing. See NFPA 80, Stan- The designer should evaluate whether the smoke dampers nor- dard for Fire Doors and Other Opening Protectives, for testing require- mally should be open or closed and should consider the fail-safe ments for fire dampers.

Activation of smoke dampers can be by area detectors that are installed in the related smoke compart- ment or by detectors that are installed in the air duct systems.

Fail- their optimum installation are covered in Section 5. The recommenda- tion of smoke through the supply air duct system and, prefer- tions in this annex apply, in general, to the period of opera- ably, to exhaust a significant quantity of smoke to the outside.

The intervals specified in this standard are intended to be A. The form should fit the system or sys- Chapter 6 provisions that are dependent on system capacity. However, it is recommended that provision be made on the form for equip- A.

Sprinklers are often tested weekly. Where it is desirable to B. There- trol system. Unit filters should be renewed or cleaned examined at the time ducts are inspected.

Items to be noted when the resistance to airflow has increased to two times the include the following: A suitable 2 The presence of buildings or structures that could present draft gauge should be provided for the purpose. Where the filters an exposure to the intake, allowing smoke and fire to be are of the automatic liquid adhesive type, sludge should be re- drawn in moved from the liquid adhesive reservoir regularly.

Damaged filter sections they should be removed immediately and arrangements made to or media should not be used. Inspections thereafter should be B. If newly erected exposures are noticed, after use should never be cleaned and reused. Use of an adhesive with a low flash point creates a serious hazard.

Care that the motor, relays, and other controls function as intended. Fans also should be least semiannually and lubricated when necessary. If, after several inspections, such frequent in- spection is determined to be unnecessary, the interval be- B. Fan controls should be examined and activated tween inspections can be permitted to be adjusted to suit the at least annually to ensure that they are in operable condition. Annex C Informational References B.

The documents or portions sary, at the time ducts are cleaned. Thorough cleaning of thereof listed in this annex are referenced within the informa- ducts can require scraping, brushing, or other positive means.

The other reasons. Additional ac- C.