Intent 1:
To limit the probability of:
- a reduction in exhaust air volume, which could lead
to inadequate ventilation, or
- the depressurization of occupied space from which air
is being exhausted, which could lead to 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.