6.2.3.12.(4)ATTRIBUTION:
Functional Statement:
F82
To minimize the risk of inadequate performance due to improper maintenance or lack of maintenance.
F81
To minimize the risk of malfunction, interference, damage, tampering, lack of use or misuse.
Objective:
OH1.1
APPLICATION:
Accessibility of screens installed to protect exterior
openings for outdoor air intakes and exhaust outlets, in heating, ventilating
and air-conditioning systems, in buildings described in Sentence
1.3.3.2.(1) of Division A.
This also applies to buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9], with respect to:
- mechanical ventilating systems other than self-contained systems serving single dwelling units, as stated in Sentence 9.32.1.2.(2),
- the ventilation of storage garages for more than 4 motor vehicles in residential occupancies, as stated in Sentence 9.32.1.1.(3),
- the ventilation of all occupancies other than residential occupancies, as stated in Sentence 9.32.1.1.(2),
- heating systems, including requirements for combustion air, and air-conditioning systems other than those serving individual dwelling units, as stated in Sentence 9.33.1.1.(2), and
- air duct distribution systems serving heating systems in which the rated heat input exceeds 120 kW, as stated in Sentence 9.33.6.1.(2).
INTENT:
To limit the probability of an inability to clear blocked
or damaged screens, which could lead to:
- a reduction in exhaust air volume, which could lead to inadequate
ventilation, which could lead to the inadequate control of:
- relative humidity, which could lead to condensation, which could lead to the growth of mould and mildew, or
- airborne pollutants, or
- for outdoor air intakes, the depressurization of occupied space from which air is being exhausted, which could lead to the entry of combustion products from fuel-fired appliances into the building.
This is to limit the probability of negative
effects on the air quality of indoor spaces, which could lead to harm to persons.
ATTRIBUTION:
Functional Statement:
F82
To minimize the risk of inadequate performance due to improper maintenance or lack of maintenance.
Objective:
OS3.4
APPLICATION:
Accessibility of screens installed to protect exterior
openings for outdoor air intakes and exhaust outlets, in heating, ventilating
and air-conditioning systems, in buildings described in Sentence
1.3.3.2.(1) of Division A.
This also applies to buildings to which Part 9 applies [see Sentence
1.3.3.3.(1) of Division A for application
of Part 9], with respect to:
- mechanical ventilating systems other than self-contained systems serving single dwelling units, as stated in Sentence 9.32.1.2.(2),
- the ventilation of storage garages for more than 4 motor vehicles in residential occupancies, as stated in Sentence 9.32.1.1.(3),
- the ventilation of all occupancies other than residential occupancies, as stated in Sentence 9.32.1.1.(2),
- heating systems, including requirements for combustion air, and air-conditioning systems other than those serving individual dwelling units, as stated in Sentence 9.33.1.1.(2), and
- air duct distribution systems serving heating systems in which the rated heat input exceeds 120 kW, as stated in Sentence 9.33.6.1.(2).
INTENT:
To limit the probability of an inability to clear blocked
or damaged outdoor air intake screens, which could lead to the depressurization
of occupied space from which air is being exhausted, which could lead to the
entry of carbon monoxide gas from fuel-fired appliances into the building,
which could lead to harm to persons.