9.32.3.8.(3)

Objective

OH1 Indoor Conditions

Attribution

Intent

Intent 1:

To limit the probability of the operation of exhaust fans without the simultaneous operation of related makeup air fans, which could lead to excessive depressurization, which could lead to:

  • the ingress of soil gases (such as methane and radon),
  • the spillage of combustion products from fuel-burning appliances that are susceptible to spillage, or
  • moisture ingress from the ground, 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, which could lead to harm to persons.

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