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9.33.6.7.(4) | Application | Intent |
| OH1 | OS2 |
| Objective | OS2 Structural Safety |
| Attribution | |
| Application | Application 1: Sealing of joints in ducts passing through unheated
spaces, 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 the escape of water vapour from
ducts, which could lead to such vapour condensing and freezing on duct surfaces
or within insulation, which could lead to the wetting of building elements,
which could lead to corrosion, rotting or mould and mildew growth, which could
lead to deterioration, which could lead to compromised structural integrity,
which could lead to harm to persons. |
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