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    • CAN/CSA-F326-M91 (R2019)
    Codes et normes - Achat

    CAN/CSA-F326-M91 (R2019)

    Residential Mechanical Ventilation Systems

    SKU: 2410793 Publié par CSA Group Année de publication 1991 Confirmé(e) en 2019 180 pages Retirée

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    Preface


    This is the first edition of CSA Standard CAN/CSA-F326, Residential Mechanical Ventilation Systems. It supersedes three Preliminary Standards: CSA Preliminary Standard F326.1-M1989, Residential Mechanical Ventilation Requirements, CSA Preliminary Standard F326.2-M1989, Residential Mechanical Ventilation System Installation Requirements, and CSA Preliminary Standard F326.3-M 1990, Verification of the Performance of Residential Mechanical Ventilation Systems. It also supersedes CSA Standard C260.1-1975, Installation Code for Residential Mechanical Exhaust Systems. When the F326 Standard is required by the various authorities with jurisdiction across Canada, it is intended that it will supersede CAN/CSA-C444-M87, Installation Requirements for Heat-Recovery Ventilators. It is written in Si (metric) units.


    This Standard defines requirements for performance, installation, and performance verification of mechanical ventilation systems intended for the provision of ventilation for acceptable indoor air quality in single-family dwellings. It also provides the installation requirements for equipment covered by CSA Standard CAN/CSA-C439-88, Standard Methods of Test for Rating the Performance of Heat-Recovery Ventilators, and CSA Standard CAN/CSA-C260-90, Rating the Performance of Residential Mechanical Ventilating Equipment. CSA Standards CAN/CSA-C439 and CAN/CSA-C260 provide methods of uniform testing for the rating of heat-recovery ventilators and fans respectively.


    This Standard was developed by the Technical Committee on Ventilation Requirements for Housing to fulfil the need for a national set of residential ventilation requirements, and to provide the necessary supporting documents to allow the requirements to be incorporated into new dwelling units being built in Canada. The technical requirements are based on the best knowledge available to the Committee at the time the Standard was prepared. In view of continuing changes in the ventilation field, a plan has been put in place by the Committee to monitor the Standard in order to ensure that it meets the needs in the marketplace. Users of the Standard are encouraged to provide any feedback they might have on the Standard and to make recommendations on any changes they feel would improve the document.


    This Standard also incorporates a number of Appendices including a commentary on the rationale for various requirements of the Standard (Appendix B), an explanation and clarification for users applying the Standard (Appendix C), and guidance on measurement techniques (Appendix D). The Appendices are not mandatory parts of the Standard.


    This Standard was approved by the CSA Technical Committee on Ventilation Requirements for Housing under the jurisdiction of the Standards Steering Committee on Energy Conservation and Housing. It has been approved as a National Standard of Canada by the Standards Council of Canada.


    Scope


    1.1

    This Standard defines the requirements for performance, installation and application, and performance verification of mechanical ventilation systems.


    This Standard applies to systems that are capable of providing minimum controlled rates of ventilation air to the habitable spaces of those single-family dwellings that


    (a) fall within the Scope of Part 9 of the National Building Code of Canada; and


    (b) are self-contained with respect to heating, ventilation, and air conditioning.


    1.2

    This Standard also applies to the installation requirements for ventilation components such as supply and exhaust ventilation fans and associated equipment, including bathroom and kitchen exhaust fans and range hoods, with or without ducts, intended for operation in dwelling units referred to in Clause 1.1, whether or not a part of a ventilation system conforming to this Standard. (See Appendix B.)


    1.3

    This Standard also applies to the installation requirements for self-contained ducted heat recovery ventilators intended for operation in dwelling units referred to in Clause 1.1, whether or not they constitute a part of a ventilation system conforming to this Standard. The applicable heat recovery ventilators have a maximum rated capacity of not less than 25 L/s and not more than 200 L/s. (See Appendix B.)


    1.4

    This Standard does not apply to the installation of recirculating forced-air heating and air conditioning systems that are not used for ventilation, but does apply to combined or integrated heating, ventilating and air conditioning systems intended to provide ventilation air in accordance with this Standard.


    1.5

    This Standard includes provisions for equipment selection and installation, system installation, and information to be provided to the purchaser.


    1.6

    The rates of ventilation and exhaust air specified in this Standard apply to the minimum capability of the system. This Standard does not mandate the way in which the occupant operates the system. The rates in operation depend on the preference of the occupants.


    1.7

    The amounts of ventilation and exhaust air specified in this Standard are intended to deal with contaminants at the rates of generation normally encountered in residential dwellings. Acceptable indoor air quality also requires that the rate of contaminant generation be controlled.


    1.8

    In establishing the dwelling unit pressure design requirements (Clause 6), the house is considered as a system that has ventilation subsystems which move air into and out of a building while taking into account the leakage characteristics of the envelope, climatic conditions, the operation of exhaust devices not part of the ventilation system, and the venting characteristics of vented combustion appliances, including fireplaces.


    1.9

    In determining the capacity of the mechanical ventilation system, this Standard takes no account of the ventilating effects of uncontrolled air leakage, of natural ventilation through open windows, or of other such openings operated by the occupants.


    1.10

    This Standard accounts for the effect of the air-tightness of the building envelope on the difference between indoor and outdoor air pressure resulting from operation of the ventilation system and other mechanical exhaust devices.


    1.11

    The ventilation air requirements of this Standard are not intended to provide for the combustion and dilution air needs of vented combustion appliances. These are specified in the Standards referred to in Clause 4.2. This Standard does incorporate provisions intended to limit the depressurization of the house induced by the operation of the ventilation system and exhaust appliances in order to minimize adverse effects on the venting of vented combustion appliances, including fireplaces. It also incorporates provisions to limit house pressurization so as not to adversely affect combustion control in some vented combustion appliances.


    1.12

    This Standard does not consider the air supply required for combustion in fireplaces, or the supply of makeup air required to account for that exhausted through the fireplace flue. Any such requirements are above and beyond those included in this Standard.


    1.13

    The ventilation air requirements of this Standard are not intended to provide sufficient ventilation for indoor thermal comfort in hot weather.

    An update to this product is available.


    To receive notifications when an amendment, new edition or update is available to your standard no matter how you purchased it, please register on the Standards Update Service. After registering, enter the List ID for the relevant standard. The List ID can be found in the “CSA Standards Update” section within the first few pages of the standard you’ve purchased. Once notified, you can then update your standard accordingly.


    PDF Format Purchased from the CSA Store

    If you have purchased or subscribed to a standard from the CSA Store in PDF format, login to your CSA OnDemandTM account to access the updated PDF.


    Paper Format Purchased or Purchased from Reseller

    If you have purchased a paper copy of the standard from the CSA Store or purchased a standard in paper or PDF format from one of our resellers, login to the Standards Update Service to download the updates in PDF format. 


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