9.33.6.7.(4)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of the escape of water vapour from ducts, which could lead to such vapour condensing and freezing on duct surfaces or within insulation, which could lead to:

  • the wetting of building elements, which could lead to corrosion, rotting or mould and mildew growth, or
  • the sagging and collapse of ducts.

This is to limit the probability of:

  • an inability to maintain the minimum indoor air temperatures [see Sentence 9.33.3.1.(1)], or
  • inadequate ventilation.

This is to limit the probability of:

  • the inadequate control of airborne pollutants or relative humidity, or
  • inadequate combustion air for fuel-burning appliances, which could lead to incomplete combustion.

This is to limit the probability of:

  • the generation of pollutants from biological growth or from materials that become unstable on wetting,
  • the deterioration of building elements, or
  • the entry of combustion products into living space.

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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