To limit the probability that improper installation
or the use of inappropriate materials will lead to performance that
falls significantly below expectations, which could lead to:
- conditioned air not being delivered to designated locations,
which could lead to:
- an inability to maintain adequate indoor air temperatures
or to control relative humidity, which could lead to condensation,
which could lead to mould and mildew growth, or
- an inadequate control of airborne pollutants, or
- in the case of ventilation systems, depressurization
in buildings, which could lead to the spillage of combustion products
from fuel-fired appliances.
This is to limit the probability of negative effects on
the air quality of indoor spaces, which could lead to harm to persons.