Back6.2.3.5.(1)

ATTRIBUTION:

Functional Statement:

F44

To limit the spread of hazardous substances beyond their point of release.

F81

To minimize the risk of malfunction, interference, damage, tampering, lack of use or misuse.

Objective:

OH1.2, OH1.3

 

APPLICATION:

Drainage from and access to all low points in underground air ducts serving heating, ventilating and air-conditioning systems, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].

INTENT:

To limit the probability that inadequate drainage and access will lead to the accumulation of water in ducts, which could lead to:
  • excessive relative humidity, or
  • the accelerated deterioration of ducts.
This is to limit the probability of:
  • the inadequate control of indoor air temperatures or relative humidity, or
  • the entry of water into living space.
This is to limit the probability of:
  • the inadequate thermal comfort of persons, and
  • contact with moisture.
This is to limit the probability of harm to persons.

ATTRIBUTION:

Functional Statement:

F44

To limit the spread of hazardous substances beyond their point of release.

F81

To minimize the risk of malfunction, interference, damage, tampering, lack of use or misuse.

Objective:

OH1.1

 

APPLICATION:

Connection to sewers of underground air ducts serving heating, ventilating and air-conditioning systems, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].

INTENT:

To limit the probability that the entry of sewer gases into duct systems will lead to the distribution of sewer gases throughout the building, which could lead to negative effects on the air quality of indoor spaces, which could lead to harm to persons.

ATTRIBUTION:

Functional Statement:

F44

To limit the spread of hazardous substances beyond their point of release.

F81

To minimize the risk of malfunction, interference, damage, tampering, lack of use or misuse.

Objective:

OH1.1

 

APPLICATION:

Installation and construction of underground air ducts serving heating, ventilating and air-conditioning systems, in buildings to which Part 6 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 6].

INTENT:

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.