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9.33.6.11.(1) | Application | Intent |
| OS1 | OH1 | OS2 |
| Objective | OS1 Fire Safety |
| Attribution | |
| Application | Application 1: Protection of supply outlets and return openings in dwelling units, where located less than 2 m above
the floor, 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 that combustible objects of significant
size will end up in ducts, which could lead to the blockage of ducts, which
could lead to an increase of the temperature in the ducts, which could lead
to fire, which could lead to harm to persons. |
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