9.32.3.3.(1)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability that the performance of heating-season mechanical ventilation systems will fall significantly below expectations.

This is to limit the probability of:

  • inadequate ventilation, or
  • the inadequate control of relative humidity.

This is to limit the probability of the inadequate control of:

  • indoor air temperatures,
  • airborne pollutants,
  • oxygen and other components necessary for breathable air, or
  • 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.

Intent 2:

[Clause (b)] To direct Code users:

  • for dwelling units with forced air heating systems, to provisions regarding the introduction of outdoor air stated in Article 9.32.3.4.,
  • for dwelling units without forced air heating systems, to provisions regarding the introduction of outdoor air stated in Article 9.32.3.5., or
  • for dwelling units meeting certain conditions such that depressurization does not present a hazard to occupants, to Article 9.32.3.6., which permits exhaust-only ventilation systems.

Top of Page