To limit moisture condensation.

To maintain appropriate air and surface temperatures.

To limit moisture condensation.

Minimum number of glazing layers in doors and adjacent
sidelights that separate heated space from unheated space or from the exterior,
in *buildings* to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application of Part 9].

To limit the probability of inadequate thermal resistance,
which could lead to:

- the excessive cooling of glass and adjacent air, or
- the inadequate control of heat transfer through doors.

This is to limit the probability of:

- the inadequate control of temperatures in interior spaces, or
- condensation.

This is to limit the probability of:

- the generation of pollutants from biological growth or from materials that become unstable on wetting, or
- deterioration, which could lead to compromised integrity or performance of doors or sidelights, or of building components protected by doors or sidelights.

This is to limit the probability of:

- negative effects on the air quality of indoor spaces,
- the inadequate thermal comfort of persons, and
- contact with moisture.

This is to limit the probability of harm to persons.

To limit moisture condensation.

Minimum number of glazing layers in doors and adjacent
sidelights that separate heated space from unheated space or from the exterior,
in *buildings* to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application of Part 9].

To limit the probability of inadequate thermal resistance,
which could lead to:

- the excessive cooling of glass and adjacent air, or
- the inadequate control of heat transfer through doors.

This is to limit the probability of deterioration,
which could lead to compromised structural integrity of building components
protected by doors or sidelights, which could lead to harm to persons.