1. OH1
  2. OS3


OH1 Indoor Conditions



Intent 1:

To limit the probability that exhaust systems will operate without the introduction of make-up air, which could lead to the depressurization of occupied space from which air is being exhausted, which could lead to:

  • a reduction in exhaust air volume, which could lead to inadequate ventilation, or
  • the entry of combustion products from fuel-fired appliances into the building.

This is to limit the probability of negative effects on the air quality of indoor spaces, which could lead to harm to persons.

Top of Page