6.2.1. General

6.2.1. General
6.2.1.1. Good Engineering Practice
(See Note A-6.2.1.1.)
  1. Heating, ventilating and air-conditioning systems, including mechanical refrigeration equipment, shall be designed, constructed and installed in conformance with good engineering practice such as that described in, but not limited to,
    1. the ASHRAE Handbooks and Standards,
    2. the HRAI Digest,
    3. the Hydronics Institute Manuals,
    4. the NFPA Standards,
    5. the SMACNA Manuals,
    6. "Industrial Ventilation: A Manual of Recommended Practice for Design" published by the ACGIH,
    7. CSA B214, "Installation Code for Hydronic Heating Systems,"
    8. CAN/CSA-Z317.2, "Special Requirements for Heating, Ventilation, and Air-Conditioning (HVAC) Systems in Health Care Facilities," and
    9. EPA 625/R-92/016, "Radon Prevention in the Design and Construction of Schools and Other Large Buildings."
6.2.1.2. Outdoor Design Conditions
  1. The outdoor conditions to be used in designing heating, ventilating and air-conditioning systems shall be determined in conformance with Subsection 1.1.3.
  2. Except as provided in Sentence 6.3.2.14.(1), the outdoor air quality conditions of the geographic area of the building site to be used in designing ventilation systems shall conform to appropriate provincial or territorial requirements or, in the absence of such requirements, shall be equal to or less than the maximum acceptable levels stated in the Canada-wide Standards for Particulate Matter (PM) and Ozone as follows:
    1. a 24 hour average of 30 μg/m3 for particulate matter that is 2.5 μm or less in diameter (PM2.5), and
    2. an 8 hour average of 65 ppb for ground-level ozone.
      (See Note A-6.2.1.2.(2).)
  3. The outdoor air quality conditions of the local area of the building site to be used in designing ventilation systems shall conform to appropriate provincial or territorial requirements or, in the absence of such requirements, to the requirements of Sentence 6.3.2.14.(2).
    (See Note A-6.2.1.2.(3).)
6.2.1.3. 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.
6.2.1.4. Structural Movement
(See Note A-6.2.1.4.)
  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.
6.2.1.5. Installation Standards
  1. Except as provided in Articles 6.9.4.2. and 6.3.1.5., the installation of heating and air-conditioning equipment, including mechanical refrigeration equipment, and including provisions for mounting, clearances and air supply, shall conform to appropriate provincial or territorial requirements or, in the absence of such requirements, to the requirements of
    1. CSA B51, "Boiler, Pressure Vessel, and Pressure Piping Code,"
    2. CSA B52, "Mechanical Refrigeration Code,"
    3. CSA B139, "Installation Code for Oil-Burning Equipment,"
    4. CSA B149.1, "Natural Gas and Propane Installation Code,"
    5. CSA B365, "Installation Code for Solid-Fuel-Burning Appliances and Equipment," or
    6. CSA C22.1, "Canadian Electrical Code, Part I."
6.2.1.6. 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.
    (See Note A-6.2.1.6.(1).)
  2. Mechanical equipment shall be provided with guards so as to prevent injury.
  3. Heating, ventilating or air-conditioning systems shall be protected from freezing if they may be adversely affected by freezing temperatures.
6.2.1.7. Asbestos
  1. Asbestos shall not be used in HVAC systems and equipment.

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