5.2.1.2.(1)

Intent 1:

To limit the probability that inappropriate assumptions will be made with regard to interior environmental load in the design of environmental separators, which could lead to the inadequate performance or premature failure of components and assemblies of environmental separators under expected environmental loads, which could lead to:

• air infiltration and exfiltration,
• excessive heat loss,
• condensation, or
• precipitation ingress.

Where life safety systems are required to be installed in environmental separators, this is to limit the probability of compromised operation of temperature-sensitive or moisture-sensitive life safety systems, which could lead to harm to persons.

Intent 2:

To direct Code users to a source of information commonly used for defining interior environmental loads.