1. OH1
  2. OS2
  3. OS1


OH1 Indoor Conditions



Intent 1:

To limit the probability of the inadequate control of:

  • total heat loss or gain due to air mass transfer,
  • air infiltration and exfiltration,
  • airborne vapour transfer from the interior above ground and from the exterior below ground,
  • precipitation ingress due to air pressure differences, or
  • condensation.

This is to limit the probability of:

  • the inadequate control of temperatures of interior spaces, drafts, relative humidity, or water accumulation,
  • pollutant ingress, including soil gas, combustion products from parking garages, and particulates,
  • the generation of pollutants from biological growth or from materials that become unstable on wetting, or
  • deterioration, which could lead to compromised integrity of environmental separators.

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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