| 9.33.4. |
General Requirements for Heating and Air-conditioning Systems |
| 9.33.4.1. |
Design of Heating and Air-conditioning Systems
- Heating and air-conditioning systems, including ducting, and mechanical heating and refrigeration equipment, shall be designed, constructed and installed to conform to the relevant provincial or territorial regulations or municipal bylaws or, in the absence of such regulations or bylaws, with good practice such as that described in the ASHRAE Handbooks and Standards, the HRAI Digest, the CHC Handbook on Hydronic Heating Systems, the Hydronics Institute Manuals and the SMACNA Manuals. (See also Subsection 9.32.3. for the design of systems that also provide ventilation.)
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| 9.33.4.2. |
Installation of Hydronic Heating Systems
- The installation of a hydronic heating system shall conform to applicable provincial or territorial regulations or municipal bylaws or, in the absence of such regulations or bylaws, to CSA B214, "Installation Code for Hydronic Heating Systems."
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| 9.33.4.3. |
Heating System Control
- Where a single heating system serves a house with a secondary suite, individual temperature controls shall be provided in each dwelling unit served by the system. (See Note A-9.33.4.3.(1).)
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| 9.33.4.4. |
Access
- Equipment forming part of a heating or air-conditioning system, with the exception of embedded pipes or ducts, shall be installed with provision for access for inspection, maintenance, repair and cleaning.
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| 9.33.4.5. |
Protection from Freezing
- Equipment forming part of a heating or air-conditioning system that may be adversely affected by freezing temperatures and that is located in an unheated area shall be protected from freezing.
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| 9.33.4.6. |
Expansion, Contraction and System Pressure
- 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.
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| 9.33.4.7. |
Structural Movement
- Mechanical systems and equipment shall be designed and installed to accommodate the maximum amount of structural movement provided for in the construction of the building.
- Where the building is in a location where the spectral response acceleration, Sa(0.2), is greater than 0.55, heating and air-conditioning equipment with fuel or power connections shall be secured to the structure to resist overturning and displacement. (See Note A-9.31.6.2.(3).)
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| 9.33.4.8. |
Asbestos
- Asbestos shall not be used in air distribution systems or equipment.
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| 9.33.4.9. |
Contaminant Transfer
- Systems serving garages, and systems serving other occupied parts of a dwelling unit but located in or running through a garage, shall be designed and constructed in a manner such that means are not provided for the transfer of contaminants from the garage into other spaces in the dwelling unit.
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