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9.33.5.2.(1)
ApplicationIntent
OP1OH1OS2OS3OS1
ObjectiveOH1 Indoor Conditions
Attribution
[F41,F63,F50-OH1.1] [F51,F52-OH1.2]
Application
Application 1: 
Installation of heating and air-conditioning equipment, including provisions for mounting, clearances and air supply, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Exceptions: 
except as stated in:
  • Article 9.33.5.3., which applies to solid-fuel-burning stoves, ranges and space heaters, and
  • Article 9.33.5.4., which applies to fireplaces.
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Intent
Intent 1: 
To limit the probability that the installation of heating or air-conditioning equipment and coupled ventilation systems will fall significantly below expectations, which could lead to inadequate performance or failure, which could lead to:
  • an inability to maintain adequate indoor air temperatures, which could lead to condensation, or
  • the inadequate replacement of indoor air with outdoor air or the distribution of outdoor air.
This is to limit the probability of:
  • the inadequate control of relative humidity,
  • the generation of pollutants from:
    • harmful micro-organisms and the media they grow on,
    • biological growth, or
    • materials that become unstable on wetting, or
  • the deterioration of building elements.
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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