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9.18.4.1.(1)
ApplicationIntent
OH1OH2
ObjectiveOH1 Indoor Conditions
Attribution
[F82-OH1.1,OH1.2]
Application
Application 1: 
Access ways for crawl spaces whose exterior walls have less than 25% of their total area above exterior ground level open to the outdoors that contain equipment requiring service, in 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 an inability to repair malfunctioning or inoperable building services.
This is to limit the probability of:
  • an inadequate control of the temperature of interior spaces or relative humidity,
  • inadequate ventilation,
  • the production of hazardous combustion products,
  • continuously leaking water supply pipes, which could lead to the accumulation of moisture, which could lead to the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • continuously leaking sewer pipes.
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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