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9.6.2.1.(1)
ApplicationIntent
OH2OH1OS2
ObjectiveOH1 Indoor Conditions
Attribution
[F51,F54-OH1.2] [F40,F61,F42-OH1.1]
Application
Application 1: 
Provision of doors at entrances to dwelling units, where the entrance opens directly to the exterior or to unheated enclosed space.
This applies to buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
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Intent
Intent 1: 
To limit the probability of:
  • excessive heat transfer,
  • excessive air infiltration or exfiltration,
  • ingress of airborne pollutants from the exterior,
  • infestation by insects or vermin, or
  • precipitation ingress.
This is to limit the probability of:
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of elements protected by doors, or
  • the inadequate control of temperatures in interior spaces, or drafts.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces, and
  • the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.
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