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6.2.2.3.(1)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Mechanical ventilation systems for enclosed storage garages serving buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].
Application 2: 
This also applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], with respect to the ventilation of storage garages for more than 4 motor vehicles in residential occupancies, as stated in Sentence 9.32.1.1.(3).
Exceptions: 
except as stated in:
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Intent
Intent 1: 
To limit the probability of inadequate ventilation, which could lead to excessive levels of carbon monoxide gas or nitrogen dioxide in storage garages, which could lead to the acute poisoning or asphyxiation of persons.
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