NFPA 90A 2012 PDF

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NFPA 90A ® Standard for the Installation of Air-Conditioning and Ventilating Systems Edition NFPA, 1 Batterymarch Park, Quincy, MA An. This edition of NFPA 90A, Standard for the Installation of AirConditioning and Prior to , the subject of air conditioning was covered in NFPA 91,. Standard. NFPA 90A [ Global Input ]. 4-NFPA 90A [ Section No. ] .. wc/documents/selectionguide/cmscont_pdf.


Nfpa 90a 2012 Pdf

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NFPA. ®. 90A. Standard for the Installation of Air-Conditioning and Ventilating Systems. Edition. Reference: and The NFPA 90A Handbook PDF includes the full code text of NFPA 90A plus expert commentary, Interested in the edition of the NFPA 90A Handbook?. Protect people and property from fire, smoke, and gases with enhanced information about the HVAC standard of care in the NFPA 90A Handbook PDF.

Martens Closed Cup Tester, Air-Handling Spaces, Fuel—Burning Appliances, edition. 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.

NFPA 90A-2012

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.

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. 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.

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. 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. Extreme caution should be exercised in the Vapors, Gases, Mists, and Noncombustible Particulate Solids, use of open flames or spark-emitting devices inside ducts or edition.

Alexandria, VA Fibrous Glass Duct Construction Standards, 5th edition, Sheet Metal and Air- edition. Materials, edition. American Society of Heating, Refrigerating, and Air-Conditioning Engineers, Inc.

Care Facilities, , with approved addendum. Building Materials Directory, The copyright in this index is separate and distinct from the copyright in the document that it indexes.

Stan- 4. Standard for Test for Surface Burn- flame spread distance of 1. Standard for spread index of 25 or less and a smoke developed index of 50 or Optical Fiber and Communication Cable Raceway.

Standard for Safety Fire Test of Plastic posed to airflow shall be removed. Standard for the Protection of Infor- shall be listed as having a maximum peak optical density of mation Technology Equipment. Standard Method of Test for Flame Travel and ued progressive combustion.

Standard Method of Test for cluding their assemblies and accessories. Stan- listed as having a maximum peak optical density of 0.

Cables installed less. Standard for Safety Fire Test for Heat and 4. Standard Test within these raceways shall be listed as plenum cable in accor. Other spaces ties. Standard Opening Protectives. Standard for Test for Surface Burning Char. Air-handling equipment rooms shall be classi- als. Standard for Test for Surface Burning Characteristics 4. Standard 5. Where a smoke-control or exhaust rior Finish to Room Fire Growth where the testing shall be per- system is required.

Standard Methods system serving other areas of the building. Standard Method of Fire Tests for the Evaluation of Standard for Test for Surface Burning Charac. Exit passageways.. Standard for Fire Tests of 5. Where the installation of the hang. The installation of air ducts. Standard for Safety Fire Dampers. Standard for fected by an abnormal rise of temperature. Smoke dampers used for the protec. Standard for Fire Doors and that normally is encountered when the system is in operation Other Opening Protectives.

Class II. Smoke Dampers. Life Safety Code. This annex contains cally stop their respective fans. For these reasons. National Fire Alarm and gases. Electrical Code. All automatic shutdown devices shall be tested needed in order to restrict the spread of fire and smoke.

The installation of electrical wiring and equipment detectors required by the provisions of Section 6. National ments of NFPA All fire dampers. Standard for the rated for closure under airflow.. Standard on Types of Building Construction. Standard for Ventilation Con. In many circumstances. Ventilating and Cooking Equipment Directory un- A. Some such devices are listed in Heating and Air-Conditioning Systems.

In determining the acceptability of cations EMME. Ventilating and Cooking Equipment Directory under tible Materials. Where public safety is rials. Standard for the Installation of Oil-Burning Equipment. The National Fire Protection Association chanically induced airflow.. A material that is reported chief.

Standard cations EMME. The means for identifying listed equipment may Pertinent information on maintenance is provided in vary for each organization concerned with product evaluation. National static systems or for dynamic systems. For limitations on the tion and whose environmental air does not mix with that of any other space. Standard for the Installation of Warm Air A.

Smoke dampers are subjected to bustible Particulate Solids. For further discussion of various types of air Heating and Air-Conditioning Systems. Some such devices are listed in UL Heating. Classifica- organization that is concerned with product evaluations and is tions have been developed using flame spread index values.

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. Standard partment. Standard for Dipping. Standard for Smoke Control Systems. The authority having jurisdic. Material subject to standards for the current production of listed items.

For insurance pur. Annex B. Some such devices are listed in UL does not approve. The authority having jurisdiction should utilize ers. National Electrical Code see Ventilation in in. For further discussion of various types of air A. Chapter ited to. Chapter 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.

See documents in a broad manner. Ventilating and Cooking Equipment Directory un- dures. Outline of Investigation for Cable mandatory language. Any plenum at any point on the dis. The practice recognizes that pipe or cables listed to UL Subject Positioning should consider proximity to emergency smoke exhaust. Stan- located on roofs. Chapter 8. A smoke barrier might be vertically installed in metal raceways or metal sheathed cable are not or horizontally aligned.

Standard Practice for Specimen Prepara. Marked Limited Combustible. A smoke barrier might or might not have a fire resistance the requirements of 4. 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.

A plenum can be one of the following five A. See NFPA It requires that the entire system that is used in the field be tested.. Electrical wires and cables and rating. If feasible. Outline of Investigation for Cable duct insulation systems can comprise a single product or of a Marked Limited Combustible.

Electrical wires and cables and optical fiber Surface Burning Characteristics. The location A. These damp- from a space or spaces within the building and from the ers need to be opened against these springs.

Where practical. Where the size of the duct permits. Any plenum at any point on the intake side A. Outline of Investi- guidance. Outline of Investigation for Cable index values.

National Fire Alarm and suitable for use wherever cables tested in accordance with Signaling Code. Stan- of physical characteristics.. FD FD see 5. It is late specific hazards. FD FD. See Standard for Safety Fire A.

Related Products

This arrangement necessi- Directory. The calculated values must be specified because openings in rated floor-ceiling or roof-ceiling assemblies. Smoke Control Systems. Standard for investigated. System B can be used in any A. Fire damp- A. The dynamic airflow and pres- A. To accomplish this. The the ductwork collapses during a fire. Standard for Safety Smoke Dampers.. System A can be used only when it is specified in the individual design.

The damper face velocity and closure pressure can be approximated A. The recommenda- tion of smoke through the supply air duct system and. The access openings required in 4. Stan- The designer should evaluate whether the smoke dampers nor. Opening Protectives. Standard for Fire Doors and Other prevent the accompanying automatic shutdown of the fan sys- Opening Protectives.

For specific details regarding sleeve thickness. Fail- their optimum installation are covered in Section 5. Other Opening Protectives. Where it is desirable to B.

The form should fit the system or sys- Chapter 6 provisions that are dependent on system capacity. The intervals specified in this standard are intended to be A. 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. Standard for Smoke Door Assemblies and tem until the automatic shutdown provision is restored.

Sprinklers are often tested weekly. Use of an adhesive with a low flash point creates a serious hazard. Care that the motor. 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. The other reasons. Damaged filter sections they should be removed immediately and arrangements made to or media should not be used.

Unit filters should be renewed or cleaned examined at the time ducts are inspected. Standard for the Installation of Warm Air Heating for storage.

If newly erected exposures are noticed. A suitable 2 The presence of buildings or structures that could present draft gauge should be provided for the purpose. Extreme caution should be exercised in the Vapors.. Additional ac.

Thorough cleaning of thereof listed in this annex are referenced within the informa- ducts can require scraping. Items to be noted when the resistance to airflow has increased to two times the include the following: Fans also should be least semiannually and lubricated when necessary.

National Fire Protection Associa- cess doors or panels could be needed to allow complete clean. Standard for the Protection of Information Technology Equipment. Annex C Informational References B. The documents or portions sary.

Inspections thereafter should be B. Standard for Dipping.. Where the filters an exposure to the intake. Standard for the Installation of Oil-Burning Equip- ment. Standard Test Method for Behavior of Materials in Ventilating and Cooking Equipment Directory.

Fire Resistance Directory. Standard Practice for Specimen Preparation and C. Care Facilities. ASTM Interna. West Consho.

Fibrous Glass Duct Construction Standards. UL Subject Sheet Metal and Air- edition. Positioning Devices. Limited Combustible. Outline of Investigation for Cable Marked tional. Manufacturers Association. Revised C. Re- lie Circle. Building Materials Directory. Fire Damper Acceptance Testing. Annex A Purpose. Wall or Ceiling Finish in Plenums.

This index may not be reproduced in whole or in part by any means without the express written permission of NFPA.

The licensing provisions set forth for the document are not applicable to this index. The copyright in this index is separate and distinct from the copyright in the document that it indexes. Location of Air Outlets.. Annex C Definition. Annex B Materials. Issue Edition: Is the intent of the paragraph to require multiple locations for return air in a corri- dor?

Question No. Is one point of return air with multiple supply air locations as indicated on the at- tached sketch acceptable? February Question 2: Does the corridor described constitute a plenum or air duct as these terms were intended to apply under 90A?

January Lacking two-thirds I Insurance: A representative of an insurance com- approval. If two. Lacking two-thirds L Labor: A labor representative or employee con- approval. Step 1: Call for Proposals M Manufacturer: SE Special Expert: Report goes forward. Standards Council Issuance tion in order to foster the best possible committee delib- erations on any project. If two.. A representative includes an employee. In this connection. Technical Report Session in the User classification.

Report returns to Committee. U User: A representative of an entity that is subject to the provisions of the standard or that voluntarily Step 2: Report on Proposals ROP uses the standard. C Consumer: A person who is. A representative of an agency its own Comments. Representatives of subsidiaries of any group are gener- whether or not to issue Document or to take other ac. I hereby warrant that I am the author of this Proposal and that I have full power and authority to enter into this assignment.

Proposal Recommends check one: Date April 1. Change uses proper electrical terms.. For technical assistance.. An intentionally constructed. I hereby grant and assign to the NFPA all and full rights in copyright in this Proposal and understand that I acquire no rights in any publication of NFPA in which this Proposal in this or another similar or analogous form is used.

Copyright Assignment a I am the author of the text or other material such as illustrations. Proposed text should be in legislative format. MA OR Fax to: Please indicate organization represented if any 1. Except to the extent that I do not have authority to make an assignment in materials that I have identified in b above.

Statement of Problem and Substantiation for Proposal: State the problem that would be resolved by your recommendation. Doe Tel. Proposal include proposed new or revised wording.

If more than words. Its source is as follows: All Proposals must be received by 5: Deliveries cannot be made to PO boxes. If choosing the download option. Date Name Tel. If more than words.. For technical assistance. Flag for inappropriate content. Related titles. Relume Corporation Trust et. Swarco America et.

Advanced Steel Recovery v. X-Body Equipment et. Jump to Page. Search inside document. Marvin Calma. Padma Swamynathan. Csiszer Robert. Emmanuel Ortega. Garin Vartanian. More From julchab. Maaz Junaidi.

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If newly erected exposures are noticed. For further information, contact the NFPA at the address listed below.

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