Intent 1:
To limit the probability of a drop in pressure and
a reduction in the flow of return air from rooms, which could lead
to:
- an inability to maintain the minimum indoor air temperatures
[see Sentence 9.33.3.1.(1)], or
- where required ventilation is provided by the forced-air
heating system, inadequate ventilation.
This is to limit the probability of:
- the inadequate control of airborne pollutants or relative
humidity, or
- condensation, which could lead to:
- the generation of pollutants from biological growth
or from materials that become unstable on wetting,
- the deterioration of building elements, or
- compromised performance of environmental separators,
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.