CAN CSA-F326-M91-1991 Residential Mechanical Ventilation Systems (First Edition General Instruction No 1 April 1991 and General Instruction No 2 October 1993).pdf

1、CAN/CSA-F326-M91A National Standard of Canada(reaffirmed 2014)Residential Mechanical Ventilation SystemsLegal Notice for StandardsCanadian Standards Association (operating as “CSA Group”) develops standards through a consensus standards development process approved by the Standards Council of Canada

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15、onic form:sLOADTHISDOCUMENTONTOACOMPUTERFORTHESOLEPURPOSEOFREVIEWINGITsSEARCHANDBROWSETHISDOCUMENTANDsPRINTTHISDOCUMENTIFITISIN0$ it consisted of 91 pages, each dated April 1991. */f you do not have General Instruction No. I, please contact CSA, Standards Sales. Amendments to Table of Contents, Clau

16、ses 2.2, 5.1 .I (now SJ), 5.1.2 (now 7.6.6). 5.1.3 (now 7.6.7), 5.2.4, 5.4 (now 5.44, 5.4.2 (new), 5.9, 5.1 1, 6.3.1, 6.3.2, 8.13.2, 8.16 (new), Appendix A, Appendix B, Appendix C, and Appendix D have been formally approved and are incorporated (and identified by a vertical line in the margin) in th

17、e attached rep lace me n t pages. CSA Standard CAN/CSA-F326-M91 now consists of the following pages: 5-12, 25-28, 33-36, 57, 58, and 81-91 dated April 1991; and 3, 4, 13-24A, 29-32, 37-53, 53A, 53B, 54-56 and 59-80 dated October 1993; These replacement pages are to be inserted into your copy of the

18、Standard; the pages replaced should be kept for reference Reside n rial Mscha nical Ve ntila tion Systems Contents Technical Committee on Ventilation Requirements for Housing 5 Preface 8 1. Scope 71 2. Definitions 12 3. Reference Publications 74 4. General Requirements 7 6 5. Ventilation Air Require

19、ments I6 5.1 Minimum Ventilation Capacity for Dwelling Units 76 5.2 Minimum Ventilation Capacity for Rooms 7 7 5.2.1 General 77 5.2.2 Use of Recirculated Air for Ventilation 18 5.2.3 Ventilation Air Delivery to Connected Rooms 20 5.2.4 Air Withdrawn from Cooking Areas 20 5.3 Air Flow Paths Between R

20、ooms 20 5.4 Exhaust from Kitchens and Bathrooms 20 5.5 Discharge of Exhaust Air 27 5.6 leakage of Exhaust Air into Ventilation Air 27 5.7 Room Air Distribution 27 5.8 Supply Air Temperature - Thermal Comfort 21 5.9 Minimum Supply Air Temperature - Ducted Heating Devices 21 5.1 0 Minimum Surface Temp

21、erature of Ducts 21 5.1 1 Controls 27 6. Dwelling Unit Pressure Design Requirements 27 6.1 Pressure Increase Limits 21 6.2 Pressure Decrease Limits - Minimum Ventilation Capacity Operation 22 6.3 Pressure Decrease Limits - Reference Exhaust Flow-Rate Condition 22 6.3.1 General 22 6.3.2 Dwelling Unit

22、s Incorporating Vented Corn bustion Appliances 22 7. Equipment Requirements 22 8. Installation Requirements 24 8.1 General 24 8.2 Good Practice 24 8.3 Control of Air Flow 24A 8.4 Noise and Vibration 25 8.5 Dampers 25 October J993 (Replaces p. 3, April 1991) 3 CAN/CSA- F32 6- M9 7 8.6 Exhaust Dischar

23、ge 25 8.7 Ducting 26 8.8 Outdoor Intake and Exhaust Openings 27 8.9 Supply Air Grilles 28 8.1 0 Access for Cleaning and Servicing 28 8.1 1 Filters 28 8.1 2 Labelling 28 8.1 3 Packaged Ventilators 29 8.13.1 General 29 8.1 3.2 House Depressurization 29 8.1 3.3 Exhaust Air Heat Recovery Devices 29 8.13

24、.4 Kitchen Exhaust Devices 30 8.1 3.5 Range Hoods and Range-Top Fans 30 8.13.6 Bathroom Fans 30 8.14 Dwelling Unit Pressure Control 3 I 8.1 5 Start-up Procedures 3 I 8.1 6 Outdoor Air Intake Shut-Off 31 9. General Requirements for Verifying Compliance 3 I 10. Verifying Compliance with Ventilation Ai

25、r Requirements 32 10.1 Minimurn Ventilation Capacity for Dwelling Unit 32 10.1.1 Flow Rates to be Determined 32 10.1.2 Measurement of Air Flow Rates 32 10.1.3 Nonducted Systems 32 10.1.4 Documentation 32 10.2 Minimum Ventilation Capacity for Rooms 33 10.2.1 Verification by Design 33 10.2.2 Verificat

26、ion by Test 34 10.3 Exhaust from Category “B“ Rooms (Kitchens and Bathrooms) 34 10.3.1 Ducted Exhaust Systems 34 10.3.2 Nonducted Exhaust Fans 34 10.4 Minimum Supply Air Temperature - Ducted Heating Devices 34 10.5 Minimum Surface Temperature of Ducts 34 1 1 Verifying Compliance with House Pressure

27、Requirements 34 1 1.1 Flow Rate Through the House Envelope Due to Pressure Increase 34 11.2 House Pressure Increase and Decrease Limits 35 1 1.2.1 Verification by Design 35 11.2.2 Verification by Test 35 Appendices A - Sample Form A 37 B - Commentary on CSA Standard F326 40 C - Explanation and Clari

28、fication of CSA Standard F326 54 D - Guide to Measurement Techniques 79 4 October 1993 (Replaces p. 4, April 1991) Residential Mechanical Ventilation Systems 2.2 The following definitions apply in this Standard: Basement - a storey or storeys of a building located below the first storey. First store

29、y refers to the uppermost storey having its floor level not more than 2 m above grade. Bathroom - any room containing a toilet, urinal, bidet, bathtub, or shower. Building envelope - the surfaces, formed by all components of the building, that enclose the conditioned votume. Conditioned volume - the

30、 total interior volume of all storeys, including the basement, but excluding any attached or built-in garage or crawl space. Dwelling unit - a suite operated as a housekeeping unit, used or intended tc be used as a domicile by one or more persons, and containing cooking, eating, living, steeping, an

31、d sanitary facilities. Exhaust air - air removed from a space such that it will not be reused. Exhaust air heat recovery device - a unit or system that incorporates a means to extract heat from exhaust air, including but not limited to heat recovery ventilators, and refrigeration -cyc le eq u i pme

32、n t . Habitable room - a space or room designed for human occupancy, such as a bedroom, living room, dining room, kitchen, family room, recreation room, or den. Heat recovery ventilator - a system or unit that incorporates a means to circulate air for ventilation and the provision to transfer heat b

33、etween two isolated air streams. Installing contractor - an individual or company that carries on the business of, or whose business includes, installing or servicing ventilation equipment, including those who agree to install or service ventilation equipment which they sell or lease. Kitchen - any

34、area in which cooking and meal-preparation activities take place, whether or not enclosed by walls. In the absence of such walls, the area may be considered not to extend beyond 1 rn from any kitchen counter or appliance. Make-up air - outdoor air supplied to replace exhaust air. Minimum ventilation

35、 capacity - the minimum rate, averaged over a 24 h period, at which the ventilation system is capable of supplying ventilation air. Nonducted fans - fans intended for mounting at the house envelope with no duct-work except for integral sleeves and inner and outer protective coverings. Occupied zone

36、- the region within an occupied space between the floor and 1800 mrn above the floor and more than 600 rnm from the walls. Outdoor air - air from the external atmosphere taken into the dwelling unit that has not previously been circulated through the Ventilation system. Outdoor winter design tempera

37、ture - the January 2-1/2% value as given in the Supplement to the Natiunal Building Code of Canada. October 1993 (Replaces p. 13, April 1991) 13 CAN/CSA- F326- M9 1 Packaged ventilator - a factory-assembled unit which incorporates a means to ventilation air and/or to remove exhaust air, and is inten

38、ded for continuous or intermittent operation, such as exhaust-air heat-recovery devices, make-up air un exhaust fans. Purchaser - the person or persons having ownership or control following the completion of the installation. supply ts, and Recirculated air - air removed from the conditioned space a

39、nd intended for reuse as supply air, and that component of supply air that has been taken from the conditioned space. Reference exhaust flow rate - the exhaust flow rate used to determine the likely level of depressurization of the house caused by operation of the ventilation system along with other

40、 exhaust devices. Relief air - indoor air removed to the outside via a specific route in order to relieve an increase of pressure in the dwelling unit relative to outside, owing to an excess of outdoor air intake flows over exhaust air flows. Return air - air removed from a space to be recirculated

41、or exhausted. Supply air - air delivered to the conditioned space and used for ventilation, heating, cooling, humidification, or dehumidification. Utility room - a room containing laundry or maintenance equipment and materials, or used as a workshop. Vented combustion appliance - a fuel-burning furn

42、ace, boiler, heater, clothes dryer, fireplace, or any other device that is connected to a chimney or vent for the purpose of exhausting products of combustion to the outdoors. Ventilation -the process of supplying and/or removing air by natural or mechanical means to and from any space. Ventilation

43、air - that portion of supply air that is outdoor air. Ventilation components - equipment and materials used in supplying or exhausting air for ventilation purposes, whether or not parts of a ventilation system conforming to this Standard. Ventilation system - all the components installed for the pur

44、pose of meeting the requirements of this Standard. 3. Reference Publications 3.1 This Standard refers to the following publications and where such reference is made it shall be to the edition listed below: CSA Standards Design and Construction of Masonry Chirnne ys and Fireplaces; CAN/CSA-A4 0 5 -M

45、8 7, 14 October 1993 (Replaces p. 14, April 7 99 7) Residential Mechanical Ventilation Systems CAN/CSA-Bl39-M91, Installation Code for Oil Burning Appliances; CAN/CSA-B3 6 5 -M 9 1 , Installation Code for Solid-Fuel-Burning Appliances and Equipment; c22.1-1990, Canadian Electrical Cuds, Part I; CAN/

46、CSA-C260-M90, Rating the Performance of Residential Mechanical Ventilating Equipment; CAN/CSA-C439-88, Standard Methods of Test for Rating the Performance of .Heat Recovery Ventilators. ASHRAE“ Handbooks 1989, Fun da rn e n t als; 1988, Equipment; 1987, HVAC Systems and Applications. CCAt Standards

47、Natural Cas installation Code; CAN/CCA-B149.1 -M86, CAN/CCA-B149.2-M86, Propane installation Code. CCSB* Standard Determination uf the Airtightness of Building Envelopes by the Fun Depressurization Method. CAN/CCSB-149.10-M86, HRAIS Manuals Residential Air System Design Manual, I st ed., (December 7

48、 986); Design and Installation Manual for Residential Mechanical Ventilation Systems. ULC* Standard Fire Tests for Air Ducts. CAN-ULC-S1 10-MB6, National Building Code of Canada, I990 *American Society of Heating, Refrigeration and Air Conditioning Engineers. t Canadian Cas Association. + Canadian G

49、eneral Standards Board. 5 Heating, Refrigerating and Air Conditioning Institute of Canada. * Underwriters Laborafories of Canada. October 1993 (Replaces p. I 5, April I99 I) 15 CAN/CSA-F326-M9 7 4. General Requirements 4.1 Mechanical ventilation systems and equipment shall be installed in conformance with the appropriate provincial requirements or, in the absence of such requirements, with the appropriate secti