9.18.7.1.(1)ATTRIBUTION:
Functional Statement:
F51
To maintain appropriate air and surface temperatures.
Objective:
OH1.1, OH1.2
APPLICATION:
Crawl spaces whose exterior walls have less than 25%
of their total area above exterior ground level open to the outdoors that
are used as warm-air plenums, in buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9].
INTENT:
To limit the probability that crawl spaces will not perform
adequately as warm-air plenums, which could lead to the inadequate heating
of the upper storeys of buildings, which could lead to:
- an inadequate control of the temperature of interior spaces, or
- condensation, which could lead to the generation of pollutants from biological growth or from materials that become unstable on wetting.
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.
ATTRIBUTION:
Functional Statement:
F51
To maintain appropriate air and surface temperatures.
Objective:
OS2.3
APPLICATION:
Crawl spaces whose exterior walls have less than 25%
of their total area above exterior ground level open to the outdoors that
are used as warm-air plenums, in buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9].
INTENT:
To limit the probability that crawl spaces will not perform
adequately as warm-air plenums, which could lead to the inadequate heating
of the upper storeys of buildings, which could lead to condensation, which
could lead to deterioration, which could lead to compromised structural integrity
of building components, which could lead to harm to persons.