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9.33.6.6.(5) | Application | Intent |
| OH1 | OS2 | OS1 | OP1 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Openings in ducts, 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 limit the probability of excessive air leakage, which
could lead to an inability to maintain the minimum indoor air temperatures
[see Sentence 9.33.3.1.(1)], which could lead to condensation, which
could lead to deterioration, which could lead to compromised structural integrity,
which could lead to harm to persons. |
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