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9.33.6.2.(2) | Application | Intent |
OS1 | OP1 |
Objective | OS1 Fire Safety |
Attribution | |
Application | Application 1: Combustible material in
ducts, associated fittings and plenums used in 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). |
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Intent | Intent 1: To exempt ducts, associated fittings and plenums from the
application of Sentence 9.33.6.2.(1), where certain criteria are met.
This is to limit the probability of the ignition of combustible
duct system components, which could lead to the spread fire and smoke throughout
the building, which could lead to harm to persons.
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