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9.32.2.3.(4)
ApplicationIntent
OH1
ObjectiveOH1 Indoor Conditions
Attribution
[F40,F50,F52-OH1.1] [F51,F52-OH1.2]
Application
Application 1: 
Design and installation of non-heating-season mechanical ventilation systems serving residential occupancies, 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 that the performance of mechanical ventilation systems will fall significantly below expectations.
This is to limit the probability of the inadequate control of:
  • airborne pollutants,
  • oxygen and other components necessary for breathable air, or
  • relative humidity, which could lead to condensation, which could lead to the generation of pollutants from biological growth or from materials that become unstable on wetting.
This is to limit the probability of:
  • negative effects on the air quality of indoor spaces, or
  • the inadequate thermal comfort of persons.
This is to limit the probability of harm to persons.
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