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6.2.3.5.(2)
ApplicationIntent
OH1
ObjectiveOH1 Indoor Conditions
Attribution
[F81-OH1.1,OH1.2,OH1.3]
Application
Application 1: 
Clean out or pump-out connection for underground duct systems serving heating, ventilating and air-conditioning systems, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].
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Intent
Intent 1: 
To limit the probability that an inability to drain or clean out the ducts will lead to the accumulation of moisture, which could lead to:
  • the inadequate delivery of warm air or the return of cold air, which could lead to an inability to maintain adequate indoor air temperatures,
  • inadequate ventilation, which could lead to the inadequate control of:
    • relative humidity, which could lead to condensation, which could lead to mould and mildew growth, or
    • airborne pollutants, or
  • the entry of water into living space.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces,
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
This is to limit the probability of harm to persons.
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