jswizzle3737/ontario_laws_and_regs huggingface dataset:
Notes to Table 4.1.8.18.:
5.8.1.3. Compliance with Required Ratings (1) Compliance with the required STC ratings shall be demonstrated through, (a) measurements carried out in accordance with Sentence 5.8.1.2.(1), or (b) the construction of separating assemblies conforming to Table 1 or 2 of MMAH Supplementary Standard SB-3, “Fire and Sound Resistance of Building Assemblies”, as applicable. (2) Compliance with the required ASTC
ratings shall be demonstrated through, (a) measurements or calculations carried out in accordance with Sentence 5.8.1.2.(2), or (b) the construction of separating assemblies conforming to Table 1 or 2 of MMAH Supplementary Standard SB-3, “Fire and Sound Resistance of Building Assemblies”, as applicable, that have an
STC rating not less than 50 in conjunction with flanking assemblies constructed in accordance with Article 9.11.1.4.
Notes to Table 4.1.8.18.:
5.8.1.5. Simplified Method for Calculating ASTC (1) This Article sets out the simplified method for calculating the ASTC ratings of separating assemblies and adjoining construction referred to in Subclause 5.8.1.2.(2)(b)(ii). (2) The
STC rating shall be used in lieu of the weighted sound reduction index required in ISO 15712-1, “Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms”. (3) The vibration reduction index for the junctions between separating assemblies shall be, (a) determined using the equations presented in Annex E of ISO 15712-1, “Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms”, or (b) measured in accordance with Parts 1 to 4 of ISO 10848, “Acoustics - Laboratory Measurement of the Flanking Transmission of Airborne and Impact Sound Between Adjoining Rooms”. (4) The weighted normalized flanking level difference shall be determined in accordance with ASTM E413, “Classification for Rating Sound Insulation”, using the results from measurements carried out in accordance with Parts 1 to 4 of ISO 10848, “Acoustics - Laboratory Measurement of the Flanking Transmission of Airborne and Impact Sound Between Adjoining Rooms”. (5) The direct weighted sound reduction index for the separating assembly shall be taken as equal to the STC rating, without correction. (6) The weighted flanking sound reduction index for each flanking path at each edge of the separating assembly shall be determined in accordance with Clause (a) or (b), depending on the type of construction: (a) for a lightweight separating wall or floor assembly with wood or steel framing and connected lightweight flanking assemblies with wood or steel framing, the index shall be taken as equal to the weighted normalized flanking level difference re-normalized for the ASTC field situation in accordance with Annex F of ISO 15712-1, “Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms”, (b) for a heavyweight separating wall or floor assembly of concrete or masonry and connected flanking assemblies of concrete or masonry, the index shall be determined in accordance with the simplified method for structure-borne transmission presented in ISO 15712-1, “Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms”. (7) Once the pertinent indices and measurements referred to in Sentences (2) to (6) have been determined based on the type of construction, the ASTC rating shall then be calculated in accordance with ISO 15712-1, “Building Acoustics - Estimation of Acoustic Performance of Buildings From the Performance of Elements - Part 1: Airborne Sound Insulation Between Rooms”. Section 5.9. Reserved Section 5.10. Standards 5.10.1. Applicable Standards
Notes to Table 5.10.1.1.:
5.10.2.1. General (1) This Subsection applies to windows, doors and skylights, including their components, that separate, (a) interior space from exterior space, or (b) environmentally dissimilar interior spaces. (2) For the purpose of this Subsection, the term “skylight” refers to unit skylights, roof windows and tubular daylighting devices. (3) Where a wired glass assembly is installed in a required fire separation, it need not conform to the requirements of this Subsection.
Notes to Table 5.10.1.1.:
5.10.2.2. Applicable Standards (1) Windows, doors and skylights shall conform to the requirements in, (a) AAMA/WDMA/CSA 101/I.S.2/A440, “NAFS – North American Fenestration Standard/Specification for Windows, Doors, and Skylights”, and (b) CSA A440S1, “Canadian Supplement to AAMA/WDMA/CSA 101/I.S.2/A440, NAFS – North American Fenestration Standard/Specification for Windows, Doors, and Skylights”. (2) Performance grades for windows, doors and skylights shall be selected according to the Canadian Supplement referenced in Clause (1)(b) so as to be appropriate for the conditions and geographic location in which the window, door or skylight will be installed. (3) Windows, doors and skylights shall conform to the performance grades selected under Sentence (2) when tested in accordance with the standard referenced in Clause (1)(a).
Notes to Table 5.10.1.1.:
5.10.2.3. Structural Loads, Air Leakage and Water Penetration (1) Windows, doors, skylights and their components shall be designed and constructed in accordance with, (a) Article 5.10.2.2., where they are covered in the scope of the standards listed in Sentence 5.10.2.2.(1), or (b) Article 5.1.4.1. and Sections 5.4. and 5.6., in other cases.
Notes to Table 5.10.1.1.:
5.10.2.4. Heat Transfer (1) Windows, doors and skylights shall meet the heat transfer performance requirements in Section 5.3. (2) Except as provided in Sentence (3), all metal-framed glazed assemblies separating interior conditioned space from interior unconditioned space or exterior space shall incorporate a thermal break to minimize condensation. (3) Metal-framed glazed assemblies need not comply with Sentence (2) where these assemblies are, (a) storm windows or doors, or (b) windows or doors that are required to have a fire-protection rating. 5.10.3. Exterior Insulation Finish Systems
Notes to Table 5.10.1.1.:
5.10.3.1. Applicable Standards (1) Where exterior insulation finish systems are installed, the systems and their components shall conform to, (a) Article 5.1.4.1. and Sections 5.3. to 5.6., and (b) CAN/ULC-S716.1, “Exterior Insulation and Finish Systems (EIFS) – Materials and Systems”, if the systems are covered in the scope of that standard.
Notes to Table 5.10.1.1.:
5.10.4. Other Fenestration Assemblies
Notes to Table 5.10.1.1.:
5.10.4.1. Definition (1) In this Subsection, Other fenestration assemblies means curtain walls, window walls, storefronts and glazed architectural structures.
Notes to Table 5.10.1.1.:
5.10.4.2. Structural and Environmental Loads (1) Other fenestration assemblies and their components shall be designed and constructed in accordance with Article 5.1.4.1.
Notes to Table 5.10.1.1.:
5.10.4.3. Heat Transfer (1) Other fenestration assemblies and their components shall meet the heat transfer performance requirements set out in Section 5.3. (2) Other fenestration assemblies that are metal-framed and separate interior conditioned space from interior unconditioned space or exterior space shall incorporate a thermal break to minimize condensation.
Notes to Table 5.10.1.1.:
5.10.4.4. Air Leakage (1) Other fenestration assemblies and their components shall be designed and constructed in accordance with Section 5.4. (2) Except as provided in Sentence (3), other fenestration assemblies
and their components shall have an air leakage characteristic, measured at an air pressure difference of 75 Pa and tested in accordance with ASTM E283, “Determining Rate of Air Leakage Through Exterior Windows, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen”, that is not greater than, (a) 0.2 L/(s•m2) for fixed portions, including any opaque portions, and (b) 1.5 L/(s•m2) for operable portions. (3) The following need not comply with Sentence (2): (a) interior windows and interior doors that do not serve as environmental separators, (b) vehicular access doors, including garage doors, (c) storm windows and storm doors, (d) commercial entrance systems, (e) revolving doors, (f) smoke and relief air vents, (g) site-built door systems, and (h) commercial steel doors.
Notes to Table 5.10.1.1.:
5.10.4.5. Water Penetration (1) Other fenestration assemblies and their components shall be designed and constructed in accordance with Section 5.6. (2) Except as provided in Sentence (4), other fenestration assemblies
and their components shall resist water penetration when tested in accordance with, (a) ASTM E331, “Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference”, or (b) ASTM E547, “Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Cyclic Static Air Pressure Difference”. (3) Testing described in Sentence (2) shall be carried out at the driving rain wind pressure as calculated in accordance with CSA A440S1, “Canadian Supplement to AAMA/WDMA/CSA 101/I.S.2/A440-11, NAFS - North American Fenestration Standard/Specification for Windows, Doors, and Skylights”. (4) The following need not comply with Sentence (2): (a) interior windows and interior doors, (b) vehicular access doors, including garage doors, (c) storm windows and storm doors, (d) commercial entrance systems, (e) revolving doors, (f) smoke and relief air vents, (g) site-built door systems, and (h) commercial steel doors. O. Reg. 332/12, Division B, Part 5; O. Reg. 361/13, ss. 32-34; O. Reg. 191/14, ss. 58, 59; O. Reg. 88/19, s. 122-128. Part 6   Heating, Ventilating and Air-Conditioning Section   6.1.   General 

      6.1.1.   Application 

            

  Section   6.2.   Design and Installation 

      6.2.1.   General 

      6.2.2.   Ventilation 

      6.2.3.   Air Duct Systems 

      6.2.4.   Air Ducts for Low Capacity Systems 

      6.2.5.   Heating Appliances, General 

      6.2.6.   Incinerators 

      6.2.7.   Unit Heaters 

      6.2.8.   Radiators and Convectors 

      6.2.9.   Piping for Heating and Cooling Systems 

      6.2.10.   Refrigerating Systems and Equipment for Air-Conditioning 

      6.2.11.   Storage Bins 

      6.2.12.   Carbon Monoxide Alarms 

      6.2.13.   Ventilation for Laboratories 

            

  Section   6.3.   Chimneys and Venting Equipment 

      6.3.1.   General Section 6.1. General 6.1.1. Application
Notes to Table 5.10.1.1.:
6.1.1.1. Scope (1) The scope of this Part shall be as described in Subsection 1.1.2. of Division A. (2) Where the method of operation of an existing heating, ventilating or
air-conditioning system is altered, the repair or component replacements that change the capacity or extent of safety of the system shall conform to this Code.
Notes to Table 5.10.1.1.:
6.1.1.2. Application (1) This Part applies to systems and equipment for heating, ventilating and air-conditioning services. Section 6.2. Design and Installation 6.2.1. General
Notes to Table 5.10.1.1.:
6.2.1.1. Good Engineering Practice (1) Heating, ventilating and air-conditioning systems, including related mechanical refrigeration systems, shall be designed, constructed and installed to conform to good engineering practice appropriate to the circumstances such as described in, (a) the ASHRAE Handbooks as follows: (i) Fundamentals, (ii) Refrigeration, (iii) HVAC Applications, (iv) HVAC Systems and Equipment, and (v) ANSI/ASHRAE/IESNA 90.1, “Energy Standard for Buildings Except Low-Rise Residential Buildings”, (b) the CSA F280, “Determining the Required Capacity of Residential Space Heating and Cooling Appliances”, and the outside winter design temperatures shall conform to MMAH Supplementary Standard SB-1, “Climatic and Seismic Data”, (c) CAN/CSA-F326-M, “Residential Mechanical Ventilation Systems”, (d) the NFPA Fire Codes, (e) the HRAI Digest, (f) the Hydronics Institute Manuals, (g) the SMACNA Manuals, (h) ACGIH, “Industrial Ventilation Manual”, (i) CAN/CSA-Z317.2, “Special Requirements for Heating, Ventilation, and Air Conditioning (HVAC) Systems in Health Care Facilities”, (j) Reserved (k) CCBFC NRCC 56191, “National Energy Code of Canada for Buildings”, and (l) EPA/625/R-92/016, “Radon Prevention in the Design and Construction of Schools and Other Large Buildings”.
Notes to Table 5.10.1.1.:
6.2.1.2. Design Indoor Air Temperatures (1) Buildings classified as Group B, Division 2 or 3 occupancies or Group C residential occupancies that are intended for use in the winter months on a continuing basis shall be insulated and be equipped with heating facilities that are capable of maintaining an indoor air temperature of 22°C at the outside winter design temperature referred to in Article 6.2.1.7. (2) All other buildings intended for occupancy in the winter months on a continuing basis should be insulated and shall be equipped with heating facilities to maintain a minimum indoor air temperature of 18°C or commensurate with the use of the building at the outside winter design temperature described in Article 6.2.1.7.
Notes to Table 5.10.1.1.:
6.2.1.3. Structural Movement (1) Mechanical systems and equipment shall be designed and installed to accommodate the maximum relative structural movement provided for in the construction
of the building.
Notes to Table 5.10.1.1.:
6.2.1.4. Installation Standards (1) The installation of solid fuel-burning appliances
for central heating systems shall comply with CSA B365, “Installation Code for Solid-Fuel-Burning Appliances and Equipment” and the manufacturer’s installation instructions. (2) The solid fuel-fired appliances in Sentence (1) shall conform to CSA B366.1, “Solid-Fuel-Fired Central Heating Appliances”. (3) The design and installation of earth energy systems shall conform to CAN/CSA-C448.2, “Design and Installation of Earth Energy Systems for Residential and Other Small Buildings”, where such systems use groundwater, submerged heat exchangers or ground heat exchangers to serve, (a) a house, or (b) a building, other than a house, where the conditioned space is not more than 1 400 m². (4) Except for houses, the design and installation of earth energy systems shall conform to CAN/CSA-C448.1, “Design and Installation of Earth Energy Systems for Commercial and Institutional Buildings”, where such systems use groundwater, submerged heat exchangers or ground heat exchangers to condition a floor space area more than 1 400 m². (5) The design and installation of solid fuel-burning stoves, ranges and space heaters, including the requirements for combustion air, shall conform to the requirements of CSA B365, “Installation Code for Solid-Fuel-Burning Appliances and Equipment” and the manufacturer’s installation instructions. (6) The design and installation of hydronic heating systems shall conform to, (a) CSA B214, “Installation Code for Hydronic Heating Systems”, or (b) good engineering practice appropriate to the circumstances such as described in Article 6.2.1.1. (7) Solid fuel-burning stoves, furnaces
and hydronic heating systems designed to burn solid fuels, other than coal, shall conform to the particulate emission limits of, (a) CSA B415.1, “Performance Testing of Solid-Fuel-Burning Heating Appliances”, or (b) the “Standards of Performance for New Residential Wood Heaters”, set out in Subpart AAA of Part 60 of Title 40 of the Code of Federal Regulations, published by the United States Environmental Protection Agency, as it read on March 16, 2015.
Notes to Table 5.10.1.1.:
6.2.1.5. Fireplaces (1) Fireplaces shall conform to the requirements of Section 9.22.
Notes to Table 5.10.1.1.:
6.2.1.6. Heat Recovery Ventilators (1) Except as provided in Sentence (2), heat recovery ventilators with rated capacities of not less than 25 L/s and not more than 200 L/s shall be installed in accordance with Article 9.32.3.11. (2) Where electric space heating, other than forced-air electric heating system, is provided in buildings of residential occupancy within the scope of Part 9, the mechanical ventilation system shall include heat recovery ventilators designed to provide a minimum 55% sensible heat recovery efficiency when tested to the low temperature thermal and ventilation performance test method set out in CAN/CSA-C439, “Rating the Performance of Heat/Energy-Recovery Ventilators”, at a Station 1 test temperature of -25°C at an air flow not less than 30 L/s.
Notes to Table 5.10.1.1.:
6.2.1.7. Outside Design Conditions (1) The outside conditions to be used in designing heating, ventilating and air-conditioning systems shall be determined in conformance with MMAH Supplementary Standard SB-1, “Climatic and Seismic Data”.
Notes to Table 5.10.1.1.:
6.2.1.8. Installation – General (1) Equipment requiring periodic maintenance and forming part of a heating, ventilating or air-conditioning system shall be installed with provision for access for inspection, maintenance, repair and cleaning. (2) Mechanical equipment shall be provided with guards to prevent injury. (3) Heating, ventilating or air-conditioning systems shall be protected from freezing if they may be adversely affected by freezing temperatures.
Notes to Table 5.10.1.1.:
6.2.1.9. Expansion, Contraction and System Pressure (1) Heating and cooling systems shall be designed to allow for expansion and contraction of the heat transfer fluid and to maintain the system pressure within the rated working pressure limits of all components of the system.
Notes to Table 5.10.1.1.:
6.2.1.10. Asbestos (1) Asbestos shall not be used in heating, ventilating or air-conditioning
systems or equipment.
Notes to Table 5.10.1.1.:
6.2.1.11. Access Openings (1) Any covering of an access opening through which a person could enter shall be openable from the inside without the use of keys where there is a possibility of the opening being accidentally closed while the system or equipment is being serviced.
Notes to Table 5.10.1.1.:
6.2.1.12. Combustible Tubing (1) Combustible
tubing for pneumatic controls may be used in buildings
required to be of noncombustible construction provided it has an outside diameter not exceeding 10 mm. 6.2.2. Ventilation
Notes to Table 5.10.1.1.:
6.2.2.1. Required Ventilation (1) Except as provided in Sentence (3), all buildings
shall be ventilated in accordance with this Part. (2) Except in storage garages and repair garages
covered by Article 6.2.2.3., the rates at which outdoor air is supplied in buildings by ventilation systems shall be not less than the rates required by ANSI/ASHRAE 62.1, “Ventilation for Acceptable Indoor Air Quality”. (3) Self-contained mechanical ventilation systems serving a house or an individual dwelling unit shall conform to, (a) this Part, or (b) Subsection 9.32.3. (4) Live/work units shall be mechanically ventilated in accordance with the requirements of Sentence (1).
Notes to Table 5.10.1.1.:
6.2.2.2. Natural Ventilation (1) Except as permitted by Sentence (2), the ventilation required by Article 6.2.2.1. shall be provided by mechanical ventilation except that it can be provided by natural ventilation or a combination of natural and mechanical ventilation in, (a)  buildings
of other than residential occupancy having an occupant load of not more than one person per 40 m² during normal use, (b)  buildings
of industrial occupancy where the nature of the process contained in them permits or requires the use of large openings in the building envelope even during the winter, or (c) seasonal buildings
not intended to be occupied during the winter. (2) Where climatic conditions permit, buildings containing occupancies other than residential occupancies, may be ventilated by natural ventilation methods in lieu of mechanical ventilation where engineering data demonstrates that such a method will provide the required ventilation for the type of occupancy.
Notes to Table 5.10.1.1.:
6.2.2.3. Ventilation of Storage and Repair Garages (1) Except as provided in Sentences (4) and (6), an enclosed storage garage shall have a mechanical ventilation system designed to, (a) limit the concentration of carbon monoxide to not more than 100 parts per million of air when measured between 900 mm and 1 800 mm from the floor, where the majority of the vehicles stored are powered by gasoline fuelled engines, (b) limit the concentration of nitrogen dioxide to not more than 3 parts per million parts of air when installed in accordance with manufacturer’s instructions, where the majority of the vehicles stored are powered by diesel fuelled engines, or (c) provide, during operating hours, a continuous supply of outdoor air at a rate of not less than 3.9 L/s for each square metre of floor area. (2) Mechanical ventilation systems provided in accordance with Clause (1)(a) shall be controlled automatically by carbon monoxide monitoring devices and systems provided in accordance with Clause (1)(b) shall be controlled automatically by nitrogen dioxide or other acceptable monitoring devices, located so as to provide full protection throughout the storage garage. (3) Mechanical ventilation systems provided in accordance with Sentence (1) shall be designed such that the pressure in the storage garage is less than the pressure in adjoining buildings of other occupancy, or in adjacent portions of the same building having a different occupancy. (4) In storage garages subject to the requirements of Sentence (1), where motor vehicles are parked by mechanical means, the ventilation requirements may be reduced by one half. (5) Except as provided in Sentence (6), ticket and attendant booths of storage garages shall be pressurized with a supply of outdoor air. (6) The requirements of Sentences (1) to (5) shall not apply to open-air storeys in a storage garage. (7) A repair garage shall have a mechanical ventilation system designed to limit the exposure of workers to, (a) carbon monoxide to below the time weighted average concentration of 25 parts per million for a normal 8 hour workday or 40 hour work week, and (b) nitrogen dioxide from diesel powered vehicles to below 0.72 parts per million for a normal 8 hour workday or 40 hour work week. (8) In a repair garage, when a repair bay is not immediately adjacent to an outside garage door opening, a system capable of providing continuous general ventilation of not less than 700 L/s per internal bay shall be provided. (9) The general ventilation system described in Sentence (8) shall be designed to, (a) operate continuously, or (b) be controlled automatically by carbon monoxide monitoring devices, located so as to provide full protection throughout the repair garage. (10) The general ventilation system described in Sentence (8) is not required when tail pipes of vehicles are directly connected to local mechanical exhaust systems that terminate outdoors.
Notes to Table 5.10.1.1.:
6.2.2.4. Indoor Air Contaminants (1) Air contaminants released within buildings shall be removed insofar as possible at their points of origin and shall not be permitted to accumulate in concentrations greater than permitted by good engineering practice appropriate to the circumstances such as that described in the publications listed in Article 6.2.1.1. (2) Systems serving spaces that contain sources of contamination and systems serving other occupied parts of the building but located in or running through spaces that contain sources of contamination shall be designed in such a manner as to prevent the spread of such contamination to other occupied parts of the building. (3) Heating, ventilating and air-conditioning systems shall be designed to minimize growth and spread of bio-contaminants. (4) Mechanical rooms containing refrigeration equipment shall be ventilated in accordance with CSA B52, “Mechanical Refrigeration Code”.
Notes to Table 5.10.1.1.:
6.2.2.5. Hazardous Gases, Dusts or Liquids (1) Except as provided in Subsection 6.2.13., systems serving spaces that contain hazardous gases, dusts or liquids shall be designed, constructed and installed in conformance with the provisions of the Fire Code made under the
Fire Protection and Prevention Act, 1997, or in the absence of requirements pertinent to such systems in the Fire Code, to good engineering practice such as is described in the publications of the National Fire Protection Association and in the CCBFC NRCC 56192, “National Fire Code of Canada”. (2) When indoor piping for Class I flammable liquids is installed in a trench, the trench shall be, (a) provided with positive ventilation to the outdoors, or (b) designed to prevent the accumulation of flammable vapours.
Notes to Table 5.10.1.1.:
6.2.2.6. Commercial Cooking Equipment (1) Except as provided in Article 3.6.3.5., all commercial cooking equipment shall be provided with ventilation systems designed, constructed and installed to conform to NFPA 96, “Ventilation Control and Fire Protection of Commercial Cooking Operations”. (2) Fire protection systems for high efficiency, high temperature commercial cooking equipment using vegetable oil or animal fat shall conform to, (a) ANSI/UL 300, “Fire Extinguishing Systems for Protection of Commercial Cooking Equipment”, or (b) ULC/ORD-C1254.6, “Fire Testing of Restaurant Cooking Area Fire Extinguishing System Units”.
Notes to Table 5.10.1.1.:
6.2.2.7. Crawl Spaces and Attic or Roof Spaces (1) Every crawl space and every attic or roof space
shall be ventilated by natural or mechanical means. 6.2.3. Air Duct Systems
Notes to Table 5.10.1.1.:
6.2.3.1. Application (1) Except as provided in Sentence (2), this Subsection applies to the design, construction and installation of air duct distribution systems serving heating, ventilating and air-conditioning systems. (2) This Subsection does not apply to the design, construction and installation of air duct distribution systems serving heating, ventilating and air-conditioning systems that serve a house or an individual dwelling unit
within the scope of Part 9.
Notes to Table 5.10.1.1.:
6.2.3.1A. Drain Pans (1)  Dehumidifying cooling coil assemblies and condensate-producing heat exchangers shall be equipped with drain pans beneath them that are, (a) designed in accordance with Section 5.11, Drain Pans, of ANSI/ASHRAE 62.1, “Ventilation for Acceptable Indoor Air Quality”, (b) provided with an outlet that is piped to the outside of the airstream in a location where condensate can be eliminated, (c) installed so that water drains freely from the pan, and (d) provided with a drain line that is
indirectly connected to a drainage system in accordance with Article 7.4.2.1.
Notes to Table 5.10.1.1.:
6.2.3.2. Materials in Air Duct Systems (1) Except as provided in Sentences (2) to (4) and in Article 3.6.4.3., all ducts, duct connectors, associated fittings and plenums
used in air duct systems shall be constructed of steel, aluminum alloy, copper, clay or similar noncombustible material. (2) Ducts, associated fittings and plenums are permitted to contain combustible material provided they, (a) conform to the appropriate requirements for Class 1 duct materials in CAN/ULC-S110, “Test for Air Ducts”, (b) conform to Article 3.1.5.15. in a building required to be of noncombustible construction or in a building or part of a building permitted to be of encapsulated mass timber construction, (c) conform to Subsection 3.1.9., (d) are used only in horizontal runs in a building required to be of noncombustible construction or in a building
or part of a building permitted to be of encapsulated mass timber construction, (e) are not used in vertical runs serving more than 2 storeys in a building required to be of noncombustible construction, and (f) are not used in air duct systems in which the air temperature may exceed 120°C. (3) Duct sealants shall have a flame-spread rating of not more than 25 and a smoke developed classification of not more than 50. (4) Duct connectors that contain combustible materials and that are used between ducts and air outlet units shall, (a) conform to the appropriate requirements for Class 1 air duct materials in CAN/ULC-S110, “Test for Air Ducts”, (b) be limited to 4 m in length, (c) be used only in horizontal runs, and (d) not penetrate required fire separations. (5) Materials in Sentences (1) to (4) installed in a location where they may be subjected to excessive moisture shall have no appreciable loss of strength when wet and shall be corrosion-resistant. (6) All ductwork and fittings shall be constructed and installed in conformance with SMACNA Manuals and ASHRAE Handbooks. (7) All duct materials and fittings shall be, (a) suitable for exposure to the temperature and humidity of the air being conveyed, and (b) resistant to corrosion due to contaminants in the air being conveyed in the duct.
Notes to Table 5.10.1.1.:
6.2.3.3. Connections and Openings in Air Duct Systems (1) Air duct systems shall have, (a) tight-fitting connections throughout, and (b) no openings other than those required for proper operation, inspection and maintenance of the system. (2) Access openings shall be provided in duct systems to allow the removal of material that may accumulate in plenums and ducts.
Notes to Table 5.10.1.1.:
6.2.3.4. Duct Coverings, Linings, Adhesives and Insulation (1) Coverings, linings and associated adhesives and insulation of air ducts, plenums and other parts of air duct systems shall be of noncombustible material when exposed to heated air or radiation from heat sources that would result in the exposed surface exceeding a temperature of 120°C. (2) When combustible coverings and linings, including associated adhesives and insulation, are used, they shall have a flame-spread rating of not more than 25 on any exposed surface or any surface that would be exposed by cutting through the material in any direction, and a smoke developed classification of not more than 50, except that the outer covering of ducts, plenums and other parts of air duct systems used within an assembly of combustible construction
may have an exposed surface flame-spread rating of not more than 75 and may have a smoke developed classification greater than 50. (3) Combustible coverings and linings in Sentence (2) shall not flame, glow, smoulder or smoke when tested in accordance with the method of test in ASTM C411, “Hot-Surface Performance of High-Temperature Thermal Insulation” at the maximum temperature to which the coverings and linings are to be exposed in service. (4) Except as provided in Sentence (5), foamed plastic insulation shall not be used as part of an air duct or for insulating an air duct. (5) Foamed plastic insulation may be used in a ceiling space that acts as a return air plenum provided the foamed plastic insulation is protected from exposure to the plenum in accordance with Article 3.1.5.12A. (6) Combustible coverings and linings of ducts, including associated adhesives and insulation, shall be interrupted at the immediate area of operation of heat sources in a duct system, such as electric resistance heaters or fuel-burning heaters or furnaces, and where the duct penetrates a fire separation. (7) Linings of ducts shall be installed so that they will not interfere with the operation of volume or balancing dampers, fire dampers, fire stop flaps and other closures.
Notes to Table 5.10.1.1.:
6.2.3.5. Underground Ducts (1) Underground ducts shall, (a) be constructed and installed with a slope to provide interior drainage to all low points, (b) not be connected directly to a sewer, and (c) be installed and constructed of materials in conformance with ASHRAE Handbooks, SMACNA Manuals and the HRAI Digest. (2) A clean-out or pump-out connection shall be provided in an underground duct system at every low point of the duct system.
Notes to Table 5.10.1.1.:
6.2.3.6. Fire Dampers (1) Fire dampers
shall conform to the requirements of Subsection 3.1.8.
Notes to Table 5.10.1.1.:
6.2.3.7. Smoke Detector Control (1) Air handling systems shall incorporate smoke detector control where required by Article 3.2.4.13.
Notes to Table 5.10.1.1.:
6.2.3.9. Interconnection of Systems (1) In a residential occupancy, air from one suite
shall not be circulated to any other suite or to a public corridor or public stairway. (2) Except as permitted by Sentence (3) and Sentence 6.2.3.8.(6), air duct systems serving storage garages shall not be directly interconnected with ductwork serving other areas of the building. (3) Where exhaust ducts are provided in conformance with Sentence 6.2.3.8.(6), they may exhaust through an enclosed storage garage prior to exhausting to the outdoors provided, (a) the storage garage exhaust system runs continuously, (b) the capacity of the storage garage exhaust system is equal to or exceeds the volume of the exhaust entering the garage, and (c) a leakage rate 1 smoke/fire damper rated in accordance with CAN/ULC-S112.1, “Leakage Rated Dampers for Use in Smoke Control Systems”, is provided near the duct outlet location in the storage garage to prevent air from the storage garage from entering the exhaust ductwork system in the event the building’s exhaust fan is shut down. (4) Except for corridors conforming to Sentence 3.3.1.4.(4) or as permitted in Sentences (5) and (6), a public corridor or corridor serving the public shall not be used as a portion of a supply, return or exhaust air system serving adjoining areas, other than as part of a supply air system serving toilet rooms, bathrooms, shower rooms and similar auxiliary spaces opening directly to the public corridor or corridor used by the public. (5) A public corridor may be used as part of an engineered smoke control system. (6) Infiltration due to corridor pressurization is permitted into a residential occupancy from a public corridor.
Notes to Table 5.10.1.1.:
6.2.3.10. Ducts in Exits (1) Except as permitted in Sentence (2), duct penetration of fire separations separating exits from the remainder of the building shall be in accordance with Article 3.4.4.4. (2) Duct penetration of fire separations separating exits from the remainder of the building
is permitted if the duct, (a) is designed for the purposes of Subsection 3.2.6., or (b) only serves the exit from a dedicated rooftop air make-up unit.
Notes to Table 5.10.1.1.:
6.2.3.11. Make-up Air (1) In ventilating systems that exhaust air to the outdoors, provision shall be made for the admission of a supply of make-up air in sufficient quantity so that the operation of the exhaust system and other exhaust equipment or combustion equipment is not adversely affected. (2) Make-up air facilities required by Sentence (1) shall be interlocked with the exhaust devices they serve so that both operate together. (3) Where make-up air facilities are intended to introduce air directly from the outdoors to occupied parts of the building in winter, they shall incorporate means of tempering that air to maintain the indoor design temperature.
Notes to Table 5.10.1.1.:
6.2.3.12. Supply, Return, Intake and Exhaust Air Openings (1) Supply, return and exhaust air openings located less than 2 000 mm above the floor in rooms or spaces in buildings shall be protected by grilles having openings of a size that will not allow the passage of a 15 mm diameter sphere. (2) Outdoor air intakes and exhaust outlets on the exterior of buildings shall be designed or located so that the air entering the building
system will not contain more contaminants than the normal exterior air of the locality in which the building is situated. (3) Exterior openings for outdoor air intakes and exhaust outlets shall be shielded from the entry of snow and rain and shall be fitted with corrosion-resistant screens of mesh having openings not larger than 15 mm, except where experience has shown that climatic conditions require larger openings to avoid icing over of the screen openings. (4) Screens required in Sentence (3) shall be accessible for maintenance. (5) Combustible grilles, diffusers and other devices for supply, return and exhaust air openings in rooms shall conform to the flame-spread rating and smoke developed classification requirements for the interior finish of the surface on which they are installed. (6) Outdoor air intakes shall be located so that they are separated a minimum distance from sources of contaminants in accordance with Table 6.2.3.12. Table 6.2.3.12.   Minimum Separation Distances between Exhaust and Air Intake Openings Forming Part of Sentence 6.2.3.12.(6) Item   Column 1 Location   Column 2 Minimum Separation Distance, m 

  1.   Garage entry of a garage for 5 or more motor vehicles, automobile loading area and drive-in queue   4.5 

  2.   Truck loading area or dock, and bus parking     7.6 

  3.   Driveway, parking space, lane, road and similar locations that carry a low volume of traffic    1.5 

  4.   Thoroughfare, arterial road, freeway, highway and similar locations that carry a high volume of traffic   7.6 

  5.   Garbage storage/pick-up area and dumpsters   4.5 

  6.   Discharge from evaporative cooling tower, evaporative fluid cooler and evaporative condenser   7.6 

  7.   Sanitary vent    3.5 

  8.   Kitchen exhaust outlet   3.0 

  9.   Vent for combustion products from solid fuel-burning appliances   3.0
Notes to Table 5.10.1.1.:
6.2.3.13. Filters and Odour Removal Equipment (1) Air filters for air duct systems shall conform to the requirements for Class 2 air filter units as described in CAN/ULC-S111, “Fire Tests for Air Filter Units”. (2) When electrostatic-type filters are used, they shall be installed so as to ensure that the electric circuit is automatically de-energized when filter access doors are opened and, in dwelling units, when the system circulating fan is not operating. (3) When odour removal equipment of the adsorption type is used it shall be, (a) installed to provide access so that adsorption material can be reactivated or renewed, and (b) protected from dust accumulation by air filters installed on the inlet side. (4) Facilities for flushing and drainage shall be provided where filters are designed to be washed in place.
Notes to Table 5.10.1.1.:
6.2.3.14. Evaporative Cooling Towers, Evaporative Fluid Coolers and Evaporative Condensers (1) Discharge from evaporative cooling towers to ventilation air intakes shall comply with CAN/CSA-Z317.2, “Special Requirements for Heating, Ventilation, and Air Conditioning (HVAC) Systems in Health Care Facilities”. (2) The distance between the air intakes of evaporative cooling towers, evaporative fluid coolers and evaporative condensers in relation to kitchen exhaust outlets, vegetation or other sources of organic matter shall be not less than 4.6 m. (3) Evaporative cooling towers, evaporative fluid coolers and evaporative condensers shall be provided with water treatment equipment for biological growth control in accordance with Subsection 7.6.2. of ASHRAE Guideline 12, “Minimizing the Risk of Legionellosis Associated with Building Water Systems”. (4) Evaporative cooling towers, evaporative fluid coolers and evaporative condensers shall be provided with access ports, service platforms, fixed ladders and restraint connections to allow visual inspection, maintenance and testing. (5) Evaporative cooling towers shall comply with the requirements of NFPA 214, “Water-Cooling Towers”.
Notes to Table 5.10.1.1.:
6.2.3.14A. Evaporative Cooling Sections, Evaporative Air Coolers, Misters, Atomizers, Air Washers and Humidifiers (1) The filter and water evaporation medium of every air washer and evaporative cooling section enclosed within a building shall be made of noncombustible material. (2) Sumps for air washer and evaporative cooling sections shall be constructed and installed so that they can be flushed and drained. (3) Evaporative air coolers, misters, atomizers, air washers and humidifiers shall be designed in accordance with Sections 8 and 9 of ASHRAE Guideline 12, “Minimizing the Risk of Legionellosis Associated with Building Water Systems”. (4) Evaporative cooling sections shall comply with the requirements of NFPA 214, “Water-Cooling Towers”.
Notes to Table 5.10.1.1.:
6.2.3.15. Fans and Associated Air Handling Equipment (1) Fans for heating, ventilating and air-conditioning
systems shall be located and installed so that their operation, (a) does not adversely affect the draft required for proper operation of fuel-fired appliances, and (b) does not allow the air in the air duct system to be contaminated by air or gases from the boiler-room or furnace-room. (2) Fans and associated air handling equipment, such as air washers, filters and heating and cooling units, when installed on the roof or elsewhere outside the building, shall be of a type designed for outdoor use.
Notes to Table 5.10.1.1.:
6.2.3.16. Vibration Isolation Connectors (1) Vibration isolation connectors in air duct systems shall be noncombustible, except that combustible
fabric connectors are permitted provided they, (a) do not exceed 250 mm in length, (b) comply with the flame-resistance requirements of CAN/ULC-S109, “Flame Tests of Flame-Resistant Fabrics and Films”, and (c) are not used in a location where they are exposed to heated air or radiation from heat sources that may cause the exposed surface to exceed a temperature of 120°C.
Notes to Table 5.10.1.1.:
6.2.3.17. Tape (1) Tape used for sealing joints in air ducts, plenums
and other parts of air duct systems shall meet the flame-resistance requirements for fabric in CAN/ULC-S109, “Flame Tests of Flame-Resistant Fabrics and Films”.
Notes to Table 5.10.1.1.:
6.2.3.18. Construction and Installation of Ducts and Plenums (1) Rectangular panels in plenums and ducts more than 300 mm wide shall be shaped to provide sufficient stiffness. (2) Where the installation of heating supply ducts in walls and floors creates a space between the duct and construction material, the space shall be fire stopped with noncombustible material at each end. (3) Ducts shall be securely supported by metal hangers, straps, lugs or brackets, except that where zero clearance is permitted, wooden brackets may be used. (4) All round duct joints shall be tight-fitting and lapped not less than 25 mm. (5) Rectangular duct connections shall be made with S and drive cleats. (6) Trunk supply ducts shall not be nailed directly to wood members. (7) Branch ducts shall be supported at suitable spacings to maintain alignment and prevent sagging. (8) Ducts in or beneath concrete slabs-on-ground shall be watertight, corrosion-, decay- and mildew-resistant. (9) Where a supply or return duct is not protected by an insulated exterior wall or where the duct is exposed to an unheated space it shall be insulated to prevent condensation.
Notes to Table 5.10.1.1.:
6.2.3.19. Clearances of Ducts and Plenums (1) The clearances from combustible material and supply plenums, supply ducts, boots and register boxes of heating systems shall conform to the requirements of Subsection 6.2.4.
Notes to Table 5.10.1.1.:
6.2.3.20. Return-Air System (1) The return-air system shall be designed to handle the entire air supply. (2) Where any part of a return duct will be exposed to radiation from the heat exchanger or other radiating part within the furnace, such part of a return duct directly above or within 600 mm of the outside furnace casing shall be noncombustible. (3) Return ducts serving solid fuel-fired furnaces shall be constructed of noncombustible
material. (4) Where combustible return ducts are permitted, they shall be lined with noncombustible material below floor registers, at the bottom of vertical ducts and under furnaces
having a bottom return. (5) The return-air system shall be designed so that the negative pressure from the circulating fan cannot affect the furnace combustion air supply nor draw combustion products from joints or openings in the furnace
or flue pipe. (6) Return-air inlets shall not be installed in an enclosed room or crawl space that provides combustion air to a fuel-fired appliance. 6.2.4. Air Ducts for Low Capacity Systems
Notes to Table 5.10.1.1.:
6.2.4.1. Application (1) The requirements of this Subsection apply to the design, construction and installation of air duct distribution systems serving heating, ventilating and air-conditioning systems that serve a house or an individual dwelling unit
within the scope of Part 9.
Notes to Table 5.10.1.1.:
6.2.4.2. Duct Design (1) Materials in supply ducts shall conform to Article 6.2.3.2. (2) Galvanized steel or aluminum supply ducts shall conform to Table 6.2.4.2. Table 6.2.4.2.   Minimum Metal Thickness of Ducts Forming Part of Sentences 6.2.4.2.(2) and (3) Item   Column 1   Column 2   Column 3   Column 4   Column 5 

      Type of Duct   Maximum Diameter, mm   Maximum Width or Depth, mm   Minimum Metal Thickness, mm 

          Duct Material 

                  Galvanized Steel   Aluminum 

  1.   Round ducts serving an individual dwelling unit in a building other than a house   125 or less   ---   0.254   0.30 

  2.   Round ducts serving a house  or an individual dwelling unit in a house   350   ---   0.33   0.30 

          over 350   ---   0.41   0.41 

  3.   Rectangular, enclosed   ---   350   0.33   0.30 

          ---   over 350    0.41   0.41 

  4.   Rectangular, not enclosed, with required clearance up to 12 mm   ---   350   0.33   0.41 

  ---   over 350    0.41   0.48  

  5.   Rectangular, not enclosed, with required clearance of more than 12 mm   ---   350   0.41   0.41 

  ---   over 350    0.48   0.48 (3) The design of fitting for ducts shall conform to SMACNA, “HVAC Duct Construction Standards – Metal and Flexible”, except that metal thickness shall conform to Table 6.2.4.2.
Notes to Table 5.10.1.1.:
6.2.4.3. Construction and Installation of Ducts and Plenums (1) Rectangular panels in plenums and ducts more than 300 mm wide shall be shaped to provide sufficient stiffness. (2) Where the installation of heating supply ducts in walls and floors creates a space between the duct and construction material, the space shall be fire stopped with noncombustible material at each end. (3) Ducts shall be securely supported by metal hangers, straps, lugs or brackets, except that where zero clearance is permitted, wooden brackets may be used. (4) All round duct joints shall be tight-fitting and lapped not less than 25 mm. (5) Rectangular duct connections shall be made with S and drive cleats. (6) Trunk supply ducts shall not be nailed directly to wood members. (7) Branch ducts shall be supported at suitable spacings to maintain alignment and prevent sagging. (8) Combustible ducts in concrete slabs-on-ground that are connected to a furnace supply plenum
shall be located not closer than 600 mm to that plenum
and not less than 600 mm from its connection to a riser or register. (9) Ducts in or beneath concrete slabs-on-ground shall be watertight, corrosion-, decay- and mildew-resistant. (10) Where a supply duct or return duct is not protected by an insulated exterior wall or where the duct is exposed to an unheated space it shall be insulated to provide a thermal resistance of not less than RSI 2.1. (11) Where a supply duct or return duct is located in an unconditioned space or outdoors, all joints of the ductwork shall be sealed to a Class A seal level in accordance with the SMACNA, “HVAC Duct Construction Standards – Metal and Flexible”. (12) Where a supply duct is located in a conditioned space, the ductwork shall be sealed to a Class C seal level in accordance with the SMACNA, “HVAC Duct Construction Standards – Metal and Flexible”. (13) Underground ducts shall, (a) be constructed and installed with a slope to provide interior drainage to all low points, (b) not be connected directly to a sewer, and (c) be installed and constructed of materials in conformance with ASHRAE Handbooks, SMACNA Manuals and the HRAI Digest. (14) A clean-out or pump-out connection shall be provided in an underground duct system at every low point of the duct system.