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9.7.3.1.(1)
OS2OH1OS1
ObjectiveOH1 Indoor Conditions
Attribution
(e),(h) [F63-OH1.1] [F51,F63-OH1.2]
Application
Application 1: 
Insulating glass, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], including glass in doors and sidelights [see Sentence 9.6.6.2.(1)].
Application 2: 
This also applies in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], with respect to glass in doors and in sidelights that could be mistaken for doors, within or at the entrance to dwelling units and in public areas, as stated in Sentence 3.3.1.19.(5) and Sentence 9.6.6.2.(1).
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Intent
Intent 1: 
To limit the probability that the performance of insulating glass will fall significantly below expectations, which could lead to the inadequate control of heat transfer, which could lead to:
  • the inadequate control of temperatures in interior spaces, or
  • condensation.
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 windows or adjacent exterior wall assemblies.
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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