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9.33.6.1.(1)
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Application
Application 1: 
Design, construction and installation of air duct distribution systems serving heating systems in which the rated heat input does not exceed 120 kW and serving only one dwelling unit, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to ventilation ducts and their fittings, as stated in Sentence 9.32.3.11.(1) [except for reasonably airtight exhaust ducts, constructed of water-impervious material and serving only bathrooms or water-closet rooms, which are permitted to be of combustible material].
Exceptions: 
except as stated in:
  • Sentence 9.32.3.1.(1), which applies to mechanical ventilation systems designed to comply with CAN/CSA-F326-M, and
  • Sentence 9.32.3.11.(6), which applies to ductwork for range hoods and range-top fans.
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Intent
Intent 1: 
To state the application of Subsection 9.33.6.
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