To limit the probability of wind-washing or short-circuiting, which could lead to the inadequate control of heat transfer through environmental separators under expected environmental loads, which could lead to:

• excessive heat loss or gain, or
• condensation.

This is to limit the probability of:

• the inadequate control of temperatures of interior spaces,
• the generation of pollutants from biological growth or from materials that become unstable on wetting, or
• deterioration, which could lead to compromised integrity of environmental separators.

This is to limit the probability of:

• negative effects on the air quality of indoor spaces, and
• the inadequate thermal comfort of persons.

This is to limit the probability of harm to persons.

To limit the probability of wind-washing or short-circuiting, which could lead to the inadequate control of heat transfer through environmental separators under expected environmental loads, which could lead to condensation.

This is to limit the probability of deterioration, which could lead to compromised structural integrity of the separators or of elements supported or protected by the separators, which could lead to structural failure, which could lead to harm to persons.

Where required life safety systems are incorporated in environmental separators, to limit the probability of wind-washing or short-circuiting, which could lead to the inadequate control of heat transfer through environmental separators under expected environmental loads, which could lead to compromised operation of temperature-sensitive or moisture-sensitive life safety systems, which could lead to harm to persons.