Division B
Acceptable Solutions
Part 9 —
Housing and Small Buildings
Section 9.32. Ventilation
9.32.1. General
9.32.1.1. Application
1) This Section applies to the ventilation of
rooms and spaces in residential occupancies by natural ventilation and to
self-contained mechanical ventilation systems serving
only one dwelling unit.
2) Mechanical ventilation systems other than
self-contained systems serving single dwelling units shall conform to Part 6.
3) A storage garage for more than 5 motor vehicles shall be ventilated in
accordance with Part 6.
9.32.1.2. Required Ventilation Provisions
1) Every dwelling unit shall incorporate provisions for
non-heating-season ventilation in accordance with
Subsection 9.32.2. and, if supplied with electrical power, provisions for heating season ventilation in
accordance with Subsection 9.32.3.
9.32.2. Non-Heating-Season Ventilation
9.32.2.1. Required Ventilation
1) Rooms or spaces in dwelling units shall be ventilated during the non-heating season by
a)natural ventilation in accordance with
Article 9.32.2.2., or
b)a mechanical ventilation system conforming
to Part 6.
2) Where a habitable room or space is not
provided with natural ventilation as described in
Sentence (1), mechanical ventilation shall be provided to exhaust inside air from or to introduce outside air
to that room or space at the rate of
a)one-half air change per hour if the room or
space is mechanically cooled during the non-heating
season, or
b)one air change per hour if it is not
mechanically cooled during the non-heating
season.
9.32.2.2. Natural Ventilation
1) The unobstructed openable ventilation area to
the outdoors for rooms and spaces in residential
buildings ventilated by natural means shall conform to
Table 9.32.2.2.
Table 9.32.2.2.
Natural Ventilation Area
Forming Part of Sentence 9.32.2.2.(1) |
| Location |
Minimum
Unobstructed
Area |
| Within dwelling unit | Bathrooms or water closet rooms |
0.09 m2 |
| Unfinished bathroom space |
0.2% of the floor area |
| Dining rooms, living rooms,
bedrooms, kitchens, combined rooms, dens,
recreation rooms and all other finished rooms |
0.28 m2 per room or
combination room |
| Other than within dwelling unit |
Bathrooms or water closet rooms |
0.09 m2 per
water-closet |
| Sleeping rooms |
0.14 m2 per
occupant |
| Laundry rooms, kitchens, recreation
rooms |
4% of the floor area |
| Corridors, storage rooms and other
similar public rooms or spaces |
2% of the floor area |
| Unfinished basement space not used
on a shared basis |
0.2% of the floor area |
2) Where a vestibule opens directly off a living
or dining room within a dwelling unit, ventilation to the outdoors for such
rooms may be through the vestibule.
3) Openings for natural ventilation other than
windows shall be constructed to provide protection from
the weather and insects.
4) Screening shall be of corrosion-resistant
material.
9.32.2. Non-Heating-Season Ventilation
9.32.2.1. Required Ventilation
1) The non-heating-season ventilation
required by Clause 9.32.1.2.(1)(a) shall be supplied
by
a)natural ventilation in accordance with
Article 9.32.2.2., or
b)a mechanical ventilation system in
accordance with Article
9.32.2.3.
9.32.2.2. Non-Heating-Season Natural Ventilation
1) The unobstructed openable ventilation area to
the outdoors for rooms and spaces in residential buildings ventilated by natural means shall conform to Table 9.32.2.2.
Table 9.32.2.2.
Natural Ventilation Area
Forming Part of Sentence 9.32.2.2.(1)
|
| Location |
Minimum Unobstructed Area |
| Within a dwelling unit |
Bathrooms or
water-closet rooms
|
0.09
m2 |
| Unfinished basement space
|
0.2% of the floor area |
| Dining
rooms, living rooms, bedrooms, kitchens, combined
rooms, dens, recreation rooms and all other finished
rooms
|
0.28 m2
per room or combination of rooms
|
| Other than within a dwelling unit |
Bathrooms or
water-closet rooms
|
0.09 m2
per water closet
|
| Sleeping areas |
0.14 m2
per occupant
|
| Laundry rooms,
kitchens, recreation rooms
|
4% of the floor area |
| Corridors, storage
rooms and other similar public rooms or spaces
|
2% of the floor area |
| Unfinished
basement space not used on a shared basis |
0.2% of the floor area |
2) Where a vestibule opens directly off a living
or dining room within a dwelling unit, ventilation to the outdoors for such rooms may be
through the vestibule.
3) Openings for natural ventilation other than
windows shall provide protection from the weather and
insects.
4) Screening shall be of corrosion-resistant
material.
9.32.2.3. Non-Heating-Season Mechanical Ventilation
1) Where a habitable room or space is not
provided with natural ventilation as described in
Article 9.32.2.2. and is mechanically
cooled, its non-heating-season mechanical ventilation
system shall
a)have the capacity to exhaust air from inside
the room or space, or to introduce outside air into
that room or space, at a rate conforming with
Table 9.32.2.3., or
b)comply with Subsection 9.32.3.
Table 9.32.2.3.
Air Change Rate
Forming Part of Clause 9.32.2.3.(1)(a)
|
| Room or Space |
Rate, L/s (cfm) |
| Master bedroom |
10 (20) |
| Other bedrooms |
5 (10) |
| Living room |
5 (10) |
| Dining room |
5 (10) |
| Family room |
5 (10) |
| Recreation room |
5 (10) |
| Basement |
10 (20) |
| Kitchen |
5 (10) |
| Bathroom or water-closet room |
5 (10) |
| Laundry room |
5 (10) |
| Utility room |
5 (10) |
| Other habitable rooms |
5 (10) |
2) In applying Clause 9.32.2.3.(1)(a),
a)at least one bedroom in each dwelling unit shall be designated as the master
bedroom,
b)air change rates for any combined
living/dining or family/dining space shall be
determined as if the spaces were individual
rooms,
c)where a basement incorporates rooms of the types designated in Table 9.32.2.3., the assigned air change
rate for each room shall be as specified for
those types of rooms,
d) basement areas used for other purposes that exceed 2/3 of the total basement floor area shall be assigned an air change rate
of 10 L/s,
e) basement areas used for other purposes that are 2/3 of the total basement floor area or less shall be assigned an air
change rate of 5 L/s, and
f)other habitable rooms, other than spaces
intended solely for access, egress, storage, or
service equipment, shall be assigned an air
change rate of 5 L/s.
3) Where a habitable room or space is not
provided with natural ventilation as described in
Article 9.32.2.2. and is not mechanically
cooled, the non-heating-season mechanical ventilation
system shall have the capacity to exhaust inside air
from the room or space or to introduce outside air to
that room or space at a rate of one air change per hour.
4) A non-heating-season mechanical
ventilation system shall be designed and installed
in conformance with good practice such as that
described in the ASHRAE Handbooks and Standards, the
HRAI Digest, the Hydronics Institute Manuals and the
SMACNA manuals.
9.32.3. Heating Season (Mechanical) Ventilation
(See Appendix A.) 9.32.3.1. Required Ventilation
1) Every dwelling unit that is supplied with electrical power shall
be provided with a mechanical ventilation system
complying with
a)CAN/CSA-F326 “Residential Mechanical
Ventilation Systems,”
b)a mechanical ventilation system designed in
conformance to Part 6, or
c)other mechanical ventilation systems as
described in this Subsection.
9.32.3.2. Design and Installation
1) Aspects of mechanical ventilation systems not
specifically described in this Subsection shall be
designed, constructed and installed in accordance with
good practice such as described in the ASHRAE Handbooks
and Standards, HRAI Digest, TECA Ventilation Guideline,
Hydronics Institute Manuals and the SMACNA
manuals.
9.32.3.3. Required Ventilation Capacity
1) Every dwelling unit shall be equipped with
a)a principal ventilation exhaust fan or
ducted central ventilation system providing a
minimum ventilation rate complying with Table 9.32.3.3.A, and
b)an exhaust fan with a ventilation rate
conforming to Table 9.32.3.3.B in every kitchen and bathroom or water-closet room, except that such a
fan is not required in the bathroom or water closet
room served by the principle ventilation exhaust fan
providing that it conforms to the minimum rates of
Table 9.32.3.3.B.
2) Where make-up air is required by Article 9.32.3.8. for the principal ventilation exhaust fan, the
maximum ventilation rate shall not exceed 55 l/s (110
cfm).
Table
9.32.3.3.A
Principal Exhaust Fan Ventilation
Rate
Forming Part of Clause 9.32.3.3.(1)(a) |
| Number of
Bedrooms(1) | Minimum Ventilation Rate |
| l/s |
| 1 |
15 |
2
|
22 |
| 3 |
30 |
| 4 or more |
35 |
Table
9.32.3.3.B
Bathroom/Kitchen Exhaust Ventilation
Rate
Forming Part of Clause 9.32.3.3.(1)(b) |
| Room |
Exhaust Rate l/s |
| Intermittent |
Continuous |
| Kitchen |
40 |
N/A |
| Bathroom |
25 |
10 |
9.32.3.4. Principal Exhaust Fan Control
1) The principal ventilation exhaust fan shall
a)be controlled by an adjustable time control
device capable of providing a
minimum of two 4-hour operating periods per day, and
have a separate manual switch when serving both the
principle ventilation exhaust function and a
bathroom or water-closet room exhaust function,
or
b)be designed to run
continuously.
9.32.3.5. Principal Exhaust Fan Capacity Rating
1) The principal ventilation exhaust fan capacity
rating shall be based on air flow performance at 50 pa
external static pressure as determined in accordance
with
a)HVI 916 “Airflow Test Standard,”
or
b)CAN/CSA-C260-M, “Rating the Performance of
Residential Mechanical Ventilating
Equipment.”
9.32.3.6. Principal Exhaust Fan Sound Rating
1) Wall and ceiling fans used as a principal
ventilation exhaust fan shall not have a sound rating
exceeding
a)1.5 Sone when controlled by an adjustable
time control device, or
b)1.0 Sone when designed to run
continuously.
2) The principal ventilation exhaust fan sound
rating shall be determined by
a)HVI 915, “Procedure for Loudness Rating of
Residential Fan Products,” or
b)CAN/CSA-C260-M, “Rating the Performance of
Residential Mechanical Ventilating Equipment.”
9.32.3.7. Kitchen/Bathroom Fan Capacity Ratings
1) Kitchen and bathroom exhaust fan capacity
rating shall be based on air flow performance at 50 pa
external static pressure as determined in accordance
with
a)HVI 916 “Airflow Test Standard,” or
b)CAN/CSA-C260-M, “Rating the Performance of
Residential Mechanical Ventilating Equipment.”
9.32.3.8. Required Make-up Air for Principal Exhaust Fan
1) Make-up ventilation air shall be provided from
the outdoors where
a)a dwelling unit contains a naturally aspirating fuel fired vented
appliance that is subject to back drafting
(See Appendix A), or
b)the dwelling unit is located in an area where soil gas is
deemed to be a problem and incorporates no soil gas
mitigation system.
2) Where make-up air is required, it shall
a)when not connected to a forced air heating
duct system be sized in accordance with Table 9.32.3.8. for the rating of the principal exhaust
fan installed, or
b)when connected to the return air duct of a
forced air heating appliance,
i)have an outdoor air supply duct size
of 100 mm diameter for smooth duct or 125 mm
diameter for insulated flex duct or equivalent
area, and
ii)have the outdoor air supply duct
connected not more than 5 m or, unless a flow
control device is used, less than 3 m upstream
of the return air connection to the furnace
cabinet,
iii)have the furnace air circulating fan
interconnected with the principal ventilation
exhaust fan, and
iv)where the winter design temperature
is colder than -10°C, have a duct
provided with a motorized damper also
interconnected with the principal ventilation
exhaust fan.
3) Where make-up ventilation air is provided as
required in Clause 9.32.3.8.(1)(a), in geographic areas where the winter design temperature is warmer than
-10°C, it shall be delivered by
a)ducting into secondary areas such as a
utility or storage room,
b)specially designed inlets in the upper sash
or high on a wall, or
c)other acceptable methods.
4) Where make-up ventilation air is provided as
indicated in Clause 9.32.3.8.(1)(a) in geographic areas where the winter design temperature is colder than
-10°C, it shall be delivered as described in
Sentence (3) with the addition of heat.
5) Systems or ducts designed to provide
combustion and/or dilution air for fuel burning
appliances shall not be used to supply make-up air for
ventilation systems.
Table
9.32.3.8.
Passive Make-up Air Opening
Size
Forming Part of Sentence 9.32.3.8.(2) |
Maximum Exhaust
Ventilation Rate |
Minimum Make-up Air
Duct Size |
| Vent Area |
Vent Dia. |
| l/s |
cm2 |
mm |
| 8 |
47 |
80 |
| 12 |
66 |
90 |
| 15 |
85 |
100 |
| 17 |
95 |
110 |
| 20 |
114 |
120 |
| 25 |
142 |
130 |
| 30 |
170 |
150 |
| 35 |
199 |
160 |
| 40 |
227 |
170 |
| 45 |
255 |
180 |
| 50 |
284 |
190 |
| 55 |
312 |
200 |
| 60 |
340 |
210 |
9.32.3.9. Exhaust and Make-up Air Ducts
1) Exhaust ducts serving wall or ceiling exhaust
fans shall be sized in accordance with Table 9.32.3.9.
2) Exhaust ducts shall discharge directly to the
outdoors.
3) Where an exhaust duct passes through or is
located adjacent to an unheated space, the duct shall be
insulated to not less than RSI 0.75.
4) Where a ventilation air supply duct passes
through a heated space the duct shall be insulated to
not less than RSI 0.75 and provided with an effective
vapour barrier.
5) Where an exhaust duct exceeds 30 m in total
equivalent length, using an equivalent length of 10
m for the exterior hood and 3 m for each 90 degree
elbow, the duct shall be increased to the next
diameter.
6) Ductwork for range hoods and range-top
fans shall
a)be of noncombustible,
corrosion-resistant material,
b)lead directly to the outdoors with no
connections to other exhaust fans or ducts,
and
c)be equipped with a grease filter at the
intake end.
Table 9.32.3.9.
Minimum Exhaust Duct Size
Required for a Wall or Ceiling Exhaust
Fan
Forming Part of Article 9.32.3.9. |
| Maximum Exhaust Fan |
Minimum Exhaust Duct Dia, mm |
| Ventilation Rate, l/s |
Smooth Duct |
Flexible Duct |
| 10 |
75 |
100 |
| 25 |
100 |
125 |
| 45 |
125 |
150 |
| 70 |
150 |
175 |
9.32.3.10. Protection from Weather
1) Outdoor air intakes and exhaust outlets shall
be shielded from the weather, birds and rodents with
hoods incorporating a screen of
corrosion-resistant material with
openings of 6 to 12 mm.
9.32.3.11. Exhaust Fan Installation
1) Installation of exhaust fans shall be in
accordance with manufacturer's instructions for
minimizing noise and vibration transmission and
achieving the required sound rating.
9.32.3.12. Accessibility
1) Ventilation equipment shall be accessible for
inspection, maintenance, repair and
cleaning.
2) Except where the kitchen exhaust grille is
located at least 1.2 m horizontally from the range,
kitchen exhaust ducts shall be designed and installed so
the entire duct can be cleaned where the duct is not
equipped with an intake filter.
9.32.3.13. Ventilation Ducts
1) Except as required by Sentence 9.32.3.9.(6), ventilation air ducts serving
general exhaust and supply ventilation air are
permitted to be of combustible
material.
9.32.3.14. Interior Distribution
1) To facilitate ventilation air transfer,
interior doors in dwelling units shall be undercut a
minimum of 12 mm or the rooms shall be provided with a
grille of equivalent area.
9.32.3. Heating-Season Mechanical Ventilation
(See
Appendix A.)
9.32.3.1. Required Ventilation
1) The heating-season ventilation required by
Clause 9.32.1.2.(1)(b) shall be
provided by a mechanical ventilation system complying
with
a) good practice such as that described in CAN/CSA-F326-M, “Residential Mechanical
Ventilation Systems,” or
b) for dwelling units with 5 or fewer bedrooms, the balance of this
Subsection.
(See
Appendix A.)
2) Mechanical ventilation systems complying with
the balance of this Subsection shall incorporate at
least the following components:
a)a principal ventilation system complying
with Article 9.32.3.3.,
b)supplemental exhaust fans complying with
Article 9.32.3.7., and
c)protection against depressurization in
accordance with Article 9.32.3.8.
9.32.3.2. Design and Installation
1) Aspects of mechanical ventilation systems not
specifically described in this Subsection shall be
designed, constructed and installed in accordance with
good practice such as that described in the ASHRAE
Handbooks and Standards, the HRAI Digest, the
HRAI Residential Mechanical Ventilation
Manual, the Hydronics Institute Manuals and the
SMACNA manuals.
2) Ventilation system equipment installed to
meet the requirements of this Section shall be
installed in accordance with the manufacturers'
instructions and recommendations except that, where
such instructions and recommendations are in
conflict with the requirements of this Subsection,
the requirements of this Subsection shall govern.
3) Except where mounted on concrete
foundations, fans and heat recovery ventilators
shall be isolated from structural components by
resilient mountings to minimize the transmission of
noise and vibration to occupied spaces.
4) Where flow-regulating dampers are required,
a)they shall be adjustable and accessible
without requiring the removal of fans, motors or
insulating materials, or the use of specialized
tools, and
b) a device on the outside of the duct or
device in which they are installed shall
indicate the position of the damper.
5) Ventilation equipment shall be accessible for
inspection, maintenance, repair and cleaning.
6) Ventilation equipment installed in unheated
spaces shall be installed so as to avoid condensation of
moisture on fans and motors, in accordance with the
manufacturers' instructions.
9.32.3.3. Principal Ventilation System
(See
Appendix A.)
1) The principal ventilation system shall
incorporate the following components:
a)a principal ventilation fan complying
with this Article, and
b)except as permitted by Article 9.32.3.6., provision for
the introduction of outdoor air to the dwelling unit, in conformance with Article 9.32.3.4. or 9.32.3.5.
2) The principal ventilation fan shall be
capable of operating at an exhaust capacity
complying with Table 9.32.3.3., referred to hereinafter as
the “normal operating exhaust capacity.” (See
Appendix A.)
Table 9.32.3.3.
Normal Operating Exhaust Capacity of
Principal Ventilation Fan
Forming Part of Sentence 9.32.3.3.(2) |
| Number of Bedrooms in Dwelling Unit |
Normal Operating
Exhaust Capacity of Principal Ventilation Fan,
L/s |
| Minimum |
Maximum |
| 1 |
16 |
24 |
| 2 |
18 |
28 |
| 3 |
22 |
32 |
| 4 |
26 |
38 |
| 5 |
30 |
45 |
| More
than 5 |
System must comply
with Clause 9.32.3.1.(1)(a) |
3) The requirement for a principal
ventilation fan may be satisfied by a single fan, by
the exhaust side of a heat recovery ventilator, or
by a group of fans, provided all fans in the group
are controlled simultaneously by a controller
complying with Sentences (5), (6) and (7). (See Appendix A.)
4) The components of the principal
ventilation system shall be approved by their
manufacturer for continuous operation.
5) The principal ventilation fan shall be
controlled by a manual switch located within the
living area of the dwelling unit and clearly marked “VENTILATION FAN.”
(See Appendix A.)
6) If all controls serving the principal
ventilation fan are in the “off” position, the
principal ventilation system shall not operate.
7) The requirement for a manual switch stated in
Sentence (5) can be satisfied by a manual override incorporated in a dehumidistat or other
automatic control, provided
a)the automatic control is located within the
living area of the dwelling unit, and
b)the manual override is clearly marked
“VENTILATION FAN.”
8) Where the principal
ventilation fan is controlled by a
dehumidistat or other automatic control in addition to
the manual switch required by Sentence (5), the manual switch shall be capable of
activating the fan regardless of the setting of the
automatic control.
9) Where an exhaust air intake for the principal
ventilation fan is connected directly to the
return side of the duct system of a forced air
heating system or other forced air distribution
system, it shall be connected, where applicable, not
less than 1 m upstream from the connection
of the outdoor air supply duct required by Sentence 9.32.3.4.(5).
10) Exhaust air intakes for principal ventilation
fans located in kitchens, bathrooms and
water-closet rooms shall be located in the ceiling
or on the wall not less than 2 m above the
floor. (See Appendix A.)
9.32.3.4. Ventilation Systems Used in Conjunction with Forced
Air Heating Systems
(See
Appendix A.)
1) Where outdoor air is to be introduced to the
dwelling unit through a forced air heating system, the
provision of outdoor air shall comply with this Article.
2) Where the actual normal operating exhaust
capacity of the fan installed to satisfy the
requirement for a principal ventilation fan exceeds
the maximum outdoor airflow permitted by Table 9.32.3.4. for a mixed air temperature
of 15°C or exceeds the minimum acceptable
return air temperature specified by the manufacturer
of the furnace, whichever is less, then either
a)the system shall incorporate a means for
tempering outdoor air introduced to the heating
system ducts so that a mixed air temperature of
15°C or the minimum acceptable return
air temperature specified by the manufacturer of
the furnace, whichever is less, is achieved when the outdoor air is at the January 2.5%
temperature and the indoor air temperature is
22°C, or
b)this Article shall be considered to be
no longer applicable and the mechanical
ventilation system shall comply with either
Clause 9.32.3.1.(1)(a) or with
Article 9.32.3.5.
Table 9.32.3.4.
Maximum Outdoor Airflow
Forming Part of Sentence 9.32.3.4.(2) |
January
2.5% Temperature as per Appendix C,
°C |
Maximum Outdoor
Airflow for Indicated Mixed Temperature,
L/s |
| 0 |
0 |
0 |
-10 |
-10 |
-10 |
-20 |
-20 |
-20 |
-30 |
-30 |
-30 |
-40 |
-40 |
-40 |
-50 |
-50 |
-50 |
| Minimum Mixed Air
Temperature, °C |
15 |
10 |
5 |
15 |
10 |
5 |
15 |
10 |
5 |
15 |
10 |
5 |
15 |
10 |
5 |
15 |
10 |
5 |
| Furnace Airflow, L/s |
|
| 0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| 100 |
32 |
55 |
77 |
22 |
38 |
53 |
17 |
29 |
40 |
13 |
23 |
33 |
11 |
19 |
27 |
10 |
17 |
24 |
| 200 |
64 |
109 |
155 |
44 |
75 |
106 |
33 |
57 |
81 |
27 |
46 |
65 |
23 |
39 |
55 |
19 |
33 |
47 |
| 300 |
— |
— |
— |
66 |
113 |
159 |
50 |
86 |
121 |
40 |
69 |
98 |
34 |
58 |
82 |
29 |
50 |
71 |
| 400 |
— |
— |
— |
— |
— |
— |
— |
— |
— |
54 |
92 |
131 |
45 |
77 |
110 |
39 |
67 |
94 |
| 500 |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
49 |
83 |
118 |
3) For the purposes of Table 9.32.3.4., the furnace airflow shall be determined
a)by operating the forced air heating
system's circulation fan at the rate chosen to
satisfy Clause 9.32.3.4.(9)(a) when
measuring the return airflow in the furnace return air plenum immediately upstream of the connection of the outdoor air supply duct required by Sentence (5) and then adding this return airflow measurement to the actual normal
operating exhaust capacity of the fan installed
to satisfy the requirement for a principal
ventilation fan, or
b)by using the manufacturer's rated flow
for the furnace for 150 Pa static pressure and the wiring configuration necessary to achieve
the flow specified in Clause
9.32.3.4.(9)(a).
4) Linear interpolation is permitted in using
Table 9.32.3.4.
5) An outdoor air supply duct shall be installed between the outdoors and the furnace return air plenum and shall be connected
a)not less than 3 m upstream of the plenum connection to the furnace, as measured along the length of the duct, or
b)through an acceptable mixing device
installed in the return air plenum.
6) The outdoor air supply duct required by Sentence (5) shall incorporate a flow-regulating
damper.
7) Where the outdoor air supply duct required by Sentence (5) is not connected to an outdoor air
supply fan, it shall be connected downstream of all
return branch connections.
8) Where the outdoor air supply duct required by Sentence (5) is connected to an auxiliary
outdoor air supply fan, the auxiliary outdoor air
supply fan shall be
a)approved by the manufacturer for the
handling of untempered outdoor air if it will be
handling untempered outdoor air,
b)approved by the manufacturer for
continuous operation, and
c)designed to provide an outdoor air
supply flow within ±10% of the actual normal
operating exhaust capacity of the exhaust fan
installed to satisfy the requirement for a
principal ventilation fan.
9) The principal ventilation fan
control required by Sentence 9.32.3.3.(5) shall be wired in such a way
that
a)activation of the principal ventilation fan
automatically activates the forced air
heating system's circulation fan to provide an
airflow not greater than the space-heating
airflow,
b) where applicable, activation of the
principal ventilation fan automatically
activates the auxiliary outdoor air supply fan
described in Sentence (8), and
c) the auxiliary outdoor air supply fan does
not operate when the principal ventilation fan
is not operating.
10) With the principal ventilation fan
operating at its normal operating exhaust capacity,
the airflow in the outdoor air supply duct shall be measured and the flow-regulating damper
required by Sentence (6) shall be adjusted and permanently
fixed so that the airflow in the outdoor air supply duct is within ±10% of the actual normal operating
exhaust capacity of the principal ventilation fan.
11) The airflow measurements required by
Sentences (3) and (10) shall be done using a method accurate to within ±15% of the flow rate being measured.
12) All connections between the ventilation
system and the heating system shall be in accordance
with Articles 9.33.4.1. and 9.33.5.2.
9.32.3.5. Ventilation Systems Not Used in Conjunction with
Forced Air Heating Systems
(See
Appendix A.)
1) Where outdoor air is to be introduced to the
dwelling unit through means other than a forced air heating
system, the provision of outdoor air shall comply with
this Article.
2) An outdoor air supply fan shall be installed
with a rated capacity within ±10% of the actual
normal operating exhaust capacity of the exhaust fan
installed to satisfy the requirement for a principal
ventilation fan.
3) The principal ventilation fan control required
by Sentence 9.32.3.3.(5) shall be wired in
such a way that
a)activation of the principal ventilation fan
automatically activates the outdoor air supply fan
required by Sentence (2), and
b) the outdoor air supply fan does not operate
when the principal ventilation fan is not
operating.
4) The outdoor air supply fan shall be connected
to the outdoors through an outdoor air supply duct.
5) The outdoor air supply duct required by Sentence (4) shall incorporate a flow-regulating
damper.
6) With the principal ventilation fan
operating at its normal operating exhaust capacity,
the airflow in the outdoor air supply duct shall be measured and the flow-regulating damper
required by Sentence (5) shall be adjusted and permanently
fixed so that the airflow in the outdoor air supply duct is within ±10% of the actual normal operating
exhaust capacity of the principal ventilation fan.
7) The airflow measurements required by
Sentence (6) shall be done using a method accurate to within ±15% of the flow rate
being measured.
8) Except where a heat recovery ventilator is
used to supply the outdoor air, the outdoor air shall be
tempered to at least 12°C
before being circulated to habitable spaces.
9) Any tempering device installed to comply
with Sentence (8) shall be installed in accordance with Articles 9.33.4.1. and 9.33.5.2.
10) Except as provided in Sentence (11), outdoor air shall be distributed by a
system of trunk and branch supply ducts, from the outdoor air supply fan required by Sentence (2) to
a)each bedroom,
b)any storey, including basements and heated crawl spaces, without a bedroom, and
c)if there is no storey without a bedroom, to the principal living area.
11) In a dwelling unit in which there is no storey without a bedroom, if an exhaust air intake for the
principal ventilation fan is located in the principal
living area and the principal ventilation fan has no
more than 2 exhaust air intakes located in other rooms,
distribution of outdoor air to the principal living area
is not required.
12) All branch supply ducts that are not fitted with diffusers with adjustable balance stops shall be
supplied with balancing dampers that
a)can be fixed in their adjusted positions,
and
b)include devices to indicate the positions of
the dampers.
13) The air supply outlets through which outdoor
air is delivered to the rooms shall be located in the
ceiling or in a wall at not less than 2 m above
the floor and shall be designed and
installed to promote diffusion across the ceiling.
14) Provision shall be made for the free flow of
air to or from all rooms by leaving gaps beneath doors,
using louvred doors or installing grilles in doors.
9.32.3.6. Exhaust-Only Ventilation Systems
(See Appendix A.) 1) A ventilation system with no provision for
the introduction of outdoor air to the dwelling unit may only be used where the dwelling unit
a)contains no solid-fuel-burning appliance, no fireplace of other than direct-vented type, and no other fuel-fired space- or water-heating appliance of other than direct-vented or mechanically vented types, and
b)has either
i)a forced air distribution system
with a circulation fan with a rated capacity
equal to at least 5 times the actual normal
operating exhaust capacity of the fan
installed to satisfy the requirement for a
principal ventilation fan, a supply side
that complies with Sentences 9.32.3.5.(10) to (12), and a return side that complies with Articles 9.33.6.13. and 9.33.6.14., or
ii)a system of exhaust ducts fitted
with balancing dampers complying with
Sentence 9.32.3.5.(12) and
arranged so that the principal ventilation
fan draws all of its air from the areas of
the dwelling unit mentioned in Sentence
9.32.3.5.(10).
2) Except as provided in Sentence (3), where an exhaust-only system is
installed, the principal ventilation fan control
required by Sentence 9.32.3.3.(5) shall be wired in such a
way that, where applicable, activation of the
principal ventilation fan automatically activates
the circulation fan of the forced air distribution
system required by SubClause 9.32.3.6.(1)(b)(i) at its
rated capacity.
3) Interlocking the forced air distribution
system's circulation fan with the principal
ventilation fan as required by Sentence (2) is not required where the forced
air distribution system is equipped with a control
that automatically activates the circulation fan at
user-selected intervals.
9.32.3.7. Supplemental Exhaust
(See
Appendix A.)
1) Except as provided in Sentences (2) and (3), a supplemental exhaust fan with a rated capacity not less than 50 L/s shall be
installed in each kitchen.
2) A supplemental exhaust fan is not required in
a kitchen where the only exhaust air intake for the
principal ventilation fan is located in that kitchen.
3) A supplemental exhaust fan is not required
in a kitchen where the principal ventilation fan
draws from that kitchen and other rooms, provided
a)the principal ventilation fan can be
switched to a high exhaust rate equal to not
less than 2.5 times the minimum normal operating
exhaust capacity specified in Table 9.32.3.3., and
b)the high exhaust rate of the principal
ventilation fan, as described in Clause (a), is activated by a manual
switch in the kitchen labelled “KITCHEN
EXHAUST.”
4) Where an exhaust air intake for the principal
ventilation fan is not located in a bathroom or
water-closet room, a supplemental exhaust fan with a
rated capacity not less than 25 L/s shall be installed
in that bathroom or water-closet room.
5) Where the intake for a supplemental exhaust
fan other than a range hood or range-top fan is installed in a kitchen, it shall be installed in the
ceiling or on the wall at not less than 2 m
above the floor.
6) A supplemental exhaust fan required by this
Article shall be controlled by a manual switch located
in the room served by the fan.
7) Where a kitchen or bathroom is exempted
from the requirement to install a supplemental
exhaust fan by virtue of Sentences (2) or (3), the principal ventilation fan shall be controlled by a manual switch located in the
kitchen or bathroom and wired in parallel with the
manual switch required by Sentence 9.32.3.3.(5).
8) Where a supplemental exhaust fan required by
this Article is controlled by a dehumidistat or other
automatic control in addition to the manual switch
required by Sentence (6), the manual switch shall be capable of activating the fan regardless of the setting
of the automatic control.
9.32.3.8. Protection Against Depressurization
(See
Appendix A.)
1) This Article applies to any dwelling unit that
a)contains a fuel-fired space- or
water-heating appliance of other than direct-vented or mechanically vented types, or
b)is located in an area where soil gas is deemed to be a problem and does not
incorporate an active soil gas mitigation system.
2) Except as provided in Sentences (8) and (9), any mechanical air exhausting device, other than the principal ventilation fan operating
at a rate not greater than the maximum permitted by
Table 9.32.3.3., shall be provided with
outdoor makeup air supplied by a fan rated to
deliver outdoor air to the dwelling unit at a rate
a)not less than the exhaust capacity of
the device, and
b)not greater than that exhaust capacity
plus 10%.
3) An outdoor makeup air supply fan required by
Sentence (2) shall be wired so that it is activated whenever the device for which it supplies
outdoor makeup air is activated.
4) The outdoor makeup air required by Sentence (2) shall be
a)introduced to a normally unoccupied area in
the dwelling unit, or
b)tempered to at least 12°C before
being introduced to occupied areas or to a supply duct system.
5) If the outdoor makeup air required by Sentence (2) is not tempered upstream of the supply fan,
the supply fan required by Sentence (2) shall be approved by the manufacturer for
the handling of untempered outdoor air.
6) A carbon monoxide alarm conforming to
CAN/CSA-6.19, “Residential Carbon
Monoxide Alarming Devices,” shall be
mechanically fixed on or near the ceiling in each
room containing a solid-fuel-burning appliance. (See also Article 9.32.3.9.)
7) Where a carbon monoxide alarm required
by Sentence (6) is powered by the dwelling unit's electrical system, there shall
be no disconnect switch between the overcurrent device
and the carbon monoxide alarm.
8) The provision of makeup air as described in
Sentence (2) is not required in a dwelling unit with solid-fuel-burning appliances, where
a)all other fuel-fired appliances are direct-vented or mechanically vented, and
b)the dwelling unit is located in an area where soil gas is deemed not to be a problem or it incorporates an
active soil gas mitigation system.
9) The provision of makeup air as described
in Sentence (2) is not required if it can be shown using the test procedures in
CAN/CGSB-51.71, “The Spillage Test:
Method to Determine the Potential for
Pressure-Induced Spillage from Vented,
Fuel-Fired, Space Heating Appliances, Water
Heaters and Fireplaces,” that the
maximum depressurization levels to which fuel-fired
space- or water-heating appliances and their venting systems will be exposed will not
exceed the limits set out in CAN/CGSB-51.71 for the
categories of fuel-fired appliances and venting systems installed in the dwelling unit.
9.32.3.9. Carbon Monoxide Alarms
(See Appendix A.) 1) This Article applies to every building that contains a residential occupancy and that also contains
a)a fuel-burning appliance, or
b)a storage garage.
2) Carbon monoxide alarms required by this
Article shall
a)conform to CAN/CSA-6.19,
“Residential Carbon Monoxide Alarming
Devices,”
b)be equipped with an integral alarm that
satisfies the audibility requirements of
CAN/CSA-6.19, “Residential Carbon
Monoxide Alarming
Devices,”
c)have no disconnect switch between the
overcurrent device and the carbon monoxide
alarm, where the carbon monoxide alarm is
powered by the dwelling unit's electrical system, and
d)be mechanically fixed at a height
recommended by the manufacturer.
3) Where a fuel-burning appliance is installed in a suite of residential occupancy, a carbon monoxide alarm shall
be installed
a)inside each bedroom, or
b)outside each bedroom, within 5 m of each
bedroom door, measured following corridors and
doorways.
4) Where a fuel-burning appliance is installed in a service room that is not in a suite of residential occupancy, a carbon monoxide alarm shall
be installed
a)either inside each bedroom, or if
outside, within 5 m of each bedroom door,
measured following corridors and doorways, in
every suite of residential occupancy that shares a wall or
floor/ceiling assembly with the service room, and
b)in the service room.
5) For each suite of residential occupancy that shares a wall or
floor/ceiling assembly with a storage garage or that is adjacent to an attic or
crawl space to which the storage garage is also adjacent, a carbon monoxide
alarm shall be installed
a)inside each bedroom, or
b)outside each bedroom, within 5 m of each
bedroom door, measured following corridors and
doorways.
9.32.3.10. Fans
(See
Appendix A.)
1) Except as provided in Sentence (4), capacity ratings for required fans shall
be determined in accordance with
a)CAN/CSA-C260-M, “Rating the Performance of
Residential Mechanical Ventilating
Equipment,” or
b) HVI 916, “Airflow Test Standard.”
2) Sound ratings for fans shall be determined in
accordance with
a)CAN/CSA-C260-M, “Rating the Performance of
Residential Mechanical Ventilating
Equipment,” or
b) HVI 915, “Procedure for Loudness Rating
of Residential Fan Products.”
3) Capacity ratings for fans shall be
measured at the external static pressure
differentials shown in Table 9.32.3.10.A.
4) Fans in heat recovery ventilators used to
provide one or more required fans shall have their
airflow at normal temperature rated in accordance
with CAN/CSA-C439, “Rating the Performance of
Heat/Energy-Recovery Ventilators.”
Table 9.32.3.10.A.
Minimum External Static Pressure
Differential for Rating of Fans
Forming Part of Sentence 9.32.3.10.(3) |
| Fan Configuration or
Application |
Minimum External
Static Pressure Differential to be Used in
Determining Rated Capacity |
| Fans installed with ducts connected
on both sides, any application |
100 Pa (0.4 inch
water column) |
| Fans installed with ducts on one
side only, used as the principal ventilation fan
in exhaust-only systems permitted by Article 9.32.3.6. |
62 Pa (0.25 inch
water column) |
| Other required fans |
25 Pa (0.1 inch
water column) |
5) Where a heat recovery ventilator is used
to provide one or more required fans, it shall have
a low-temperature ventilation reduction factor of
not less than 50% when tested in accordance with
CAN/CSA-C439, “Rating the Performance of
Heat/Energy-Recovery Ventilators,” at an
outdoor temperature at least as low as the outdoor
design temperature for the location where the
ventilation system is to be installed, but the
outdoor design temperature need not be lower than
-25°C.
6) Fans, including makeup air supply fans,
installed to satisfy Articles 9.32.3.3. to 9.32.3.8. with less than 1 m of duct between themselves and the visible interior surfaces
of rooms other than unfinished basements, furnace rooms, utility rooms and attics, shall have
a sound rating complying with Table 9.32.3.10.B. when operating at the
required flow rate.
Table 9.32.3.10.B.
Maximum Sound Rating for Fans
Forming Part of Sentence 9.32.3.10.(6) |
| Fan
Application |
Maximum Sound Rating,
sones |
| Rated according to
CAN/CSA-C260-M |
Rated according to
HVI 915 |
| Principal
ventilation fan |
2.0 |
2.5 |
| Supplemental fans installed in bathrooms and
their makeup air fans |
2.5 |
3.5 |
| Supplemental fans installed in kitchens and
their makeup air fans |
No rating
required |
No rating
required |
7) Mechanical ventilation devices shall conform
to CSA C22.2 No. 113-M, “Fans and Ventilators.”
9.32.3.11. Ducts
(See
Appendix A.)
1) Except as provided in Sentence (6), ventilation ducts and their fittings shall
conform to the requirements of Article 9.33.6.2. , except that exhaust ducts serving only a bathroom or water-closet room are
permitted to be of combustible material, provided they are reasonably airtight and constructed of
a material impervious to water.
2) Exhaust ducts shall not discharge into heated or unheated enclosed
spaces.
3) Where an exhaust duct passes through an unheated space or is not separated from an unheated space
by an insulated building assembly, the duct shall be insulated to not less than RSI 0.5.
4) Where a duct carrying outdoor air that is not
tempered and not mixed with indoor air passes through
heated space, it shall be insulated to not less than RSI
0.5.
5) All exhaust intakes located within 3 m
horizontally of a range shall be equipped with a grease filter at the intake end.
6) Ductwork for range hoods and range-top fans shall
a)be of noncombustible, corrosion-resistant material,
b)lead directly to the outdoors with no
connections to other exhaust fans or ducts,
and
c)be equipped with a grease filter at the
intake end.
7) All ductwork shall be installed to avoid
crushing and shall be permanently supported to prevent
sagging.
8) Joints in all ventilation system ducting
shall be sealed with mastic, metal foil duct tape or
the manufacturers' specified sealants.
9) Except where the size of a duct can be
determined using Table 9.32.3.11.A. or Table 9.32.3.11.B., duct sizes shall be
determined according to Subsection 9.33.4.
Table 9.32.3.11.A.
Equivalent Duct Sizes
Forming Part of Sentence 9.32.3.11.(9) |
Fan's External
Static Pressure,
Pa |
Duct Diameter,
mm |
Maximum Airflow in Duct, L/s |
| 7 |
15 |
25 |
35 |
50 |
75 |
100 |
| Maximum Length of Duct, m |
| 25 |
75 |
6 |
1 |
0 |
0 |
0 |
0 |
0 |
| 100 |
25 |
6 |
2 |
1 |
0 |
0 |
0 |
| 125 |
60 |
17 |
6 |
3 |
1 |
0 |
0 |
| 150 |
60 |
42 |
16 |
8 |
4 |
2 |
1 |
| 175 |
60 |
60 |
34 |
18 |
9 |
4 |
2 |
| 200 |
60 |
60 |
60 |
35 |
18 |
8 |
5 |
| 50 |
75 |
16 |
4 |
1 |
0 |
0 |
0 |
0 |
| 100 |
60 |
16 |
6 |
3 |
1 |
0 |
0 |
| 125 |
60 |
47 |
18 |
9 |
5 |
2 |
1 |
| 150 |
60 |
60 |
44 |
23 |
12 |
5 |
3 |
| 175 |
60 |
60 |
60 |
49 |
25 |
12 |
7 |
| 200 |
60 |
60 |
60 |
60 |
48 |
22 |
13 |
| 62.5 |
75 |
22 |
5 |
2 |
1 |
0 |
0 |
0 |
| 100 |
60 |
21 |
8 |
4 |
2 |
1 |
0 |
| 125 |
60 |
60 |
24 |
12 |
6 |
3 |
1 |
| 150 |
60 |
60 |
58 |
31 |
15 |
7 |
4 |
| 175 |
60 |
60 |
60 |
60 |
33 |
15 |
9 |
| 200 |
60 |
60 |
60 |
60 |
60 |
29 |
17 |
| 100 |
75 |
38 |
9 |
3 |
1 |
0 |
0 |
0 |
| 100 |
60 |
36 |
14 |
7 |
3 |
1 |
1 |
| 125 |
60 |
60 |
41 |
22 |
11 |
5 |
3 |
| 150 |
60 |
60 |
60 |
53 |
27 |
12 |
7 |
| 175 |
60 |
60 |
60 |
60 |
57 |
27 |
15 |
| 200 |
60 |
60 |
60 |
60 |
60 |
51 |
30 |
| 150 |
75 |
59 |
14 |
5 |
2 |
1 |
0 |
0 |
| 100 |
60 |
57 |
22 |
11 |
6 |
2 |
1 |
| 125 |
60 |
60 |
60 |
34 |
17 |
8 |
4 |
| 150 |
60 |
60 |
60 |
60 |
42 |
20 |
11 |
| 175 |
60 |
60 |
60 |
60 |
60 |
42 |
24 |
| 200 |
60 |
60 |
60 |
60 |
60 |
60 |
46 |
10) In using Table 9.32.3.11.A.,
a)when sizing branch ducts, “maximum
length of duct” refers to the physical length of
the duct from the interior grille served by that
branch duct to the exterior hood,
b)when sizing a trunk duct, “maximum
length of duct” refers to the physical length of
the duct from the interior grille of the longest
branch served by that trunk to the exterior
hood,
c)outdoor air supply ducts shall be sized
as trunk ducts,
d)“maximum airflow in duct” refers to the
maximum airflow rate that a given section of
duct (branch or trunk) must provide to satisfy
the ventilation system design, and
e)“fan's external static pressure” refers
to the external static pressure at which the fan
is rated to achieve the maximum airflow rate
that the fan is required or intended to
provide.
11) Where flexible duct is used, it may be
sized by choosing the next higher diameter in
Table 9.32.3.11.A. or by choosing the
diameter for a duct twice as long as the actual
length.
12) Where rectangular duct is used in place of
round duct, it shall be selected according to Table 9.32.3.11.B.
Table 9.32.3.11.B.
Equivalent Duct Sizes
Forming Part of Sentence 9.32.3.11.(9) Sentence 9.32.3.11.(12) |
Required Round Duct
Size, mm
(in.)
|
Permitted Equivalent
Rectangular Duct Size, mm (in.)
|
| Stack duct |
100 mm (4 in.) depth |
125 mm (5 in.) depth |
150 mm (6 in.) depth |
| 75 (3) |
75 x 150
(3 x 6)
|
50 x 100
(2 x 4)
|
— |
— |
| 100 (4) |
75 x 250
(3 x 10)
|
75 x 100
(3 x 4)
|
75 x 125
(3 x 5)
|
75 x 150
(3 x 6)
|
| 125 (5) |
75 x 250
(3 x 10)
|
125 x 100
(5 x 4)
|
100 x 125
(4 x 5)
|
100 x 150
(4 x 6)
|
| 150 (6) |
75 x 300
(3 x 14)
|
200 x 100
(8 x 4)
|
150 x 125
(6 x 5)
|
125 x 150
(5 x 6)
|
| 175 (7) |
75 x 350
(3 x 14)
|
275 x 100
(11 x 4)
|
200 x 125
(8 x 5)
|
175 x 150
(7 x 6)
|
| > 175 (> 7) |
design to Subsection 9.33.4. |
9.32.3.12. Heat Recovery Ventilators
(See
Appendix A.)
1) This Article shall apply to heat recovery
ventilators installed to provide one or more of the fans
required by this Subsection.
2) Two or more heat recovery ventilators shall
not be connected in parallel airflow to a common air
supply duct, unless specifically permitted by the
manufacturer.
3) Two or more heat recovery ventilators shall
not be connected in parallel airflow to a common
downstream exhaust duct.
4) All start-up procedures recommended by the
manufacturer, including air balancing and airflow
determination, shall be followed.
5) A means for the free flow of condensate shall
be provided in accordance with the manufacturer's
recommendations or, in their absence, a condensate drain
of at least 1/2 inch nominal pipe size pitched in the
direction of flow and complete with a trap or condensate
pump of sufficient capacity shall be installed
and connected to the dwelling unit's drain, waste and vent system.
6) The heat recovery ventilator and all
condensate lines shall be installed in a space where the
ambient temperature will not adversely affect the
operation of the system.
9.32.3.13. Outdoor Intake and Exhaust Openings
1) Intake openings shall be located so as to
avoid contamination of the ventilation air from other
local sources such as automobile exhaust and exhaust
from the building or adjacent buildings.
2) The distance from the bottom of an air intake
opening to finished ground or to any nearer and lower
permanent horizontal surface shall be not less than
450 mm or the depth of expected snow accumulation,
whichever is greater.
3) The distance separating air intakes from building envelope penetrations that are potential sources of contaminants,
such as gas vents or oil fill pipes, shall be not less than
900 mm.
4) Air intakes shall be clearly labeled as such
for identification from locations outside the dwelling unit.
5) The distance from the bottom of an exhaust
outlet to finished ground or to any nearer and lower
permanent horizontal surface shall be not less than
100 mm.
6) Where air intake and exhaust openings are in
exposed locations, provision shall be made to protect
them from the entry of precipitation by the use of
louvres, weather cowls or other suitable protection.
7) Air intake openings shall incorporate screens
or grilles to protect against the entry of animals and
insects.
8) Except for exhaust outlets serving heat
recovery ventilators, exhaust outlets shall incorporate
backdraft dampers.
9) An exhaust outlet that does not incorporate a
backdraft damper located at the building envelope shall incorporate a screen located at the building envelope to protect against the entry of animals.
10) Screens, grilles and filters installed
in air intake and exhaust openings shall be
easily removable for cleaning purposes, without
the need for special tools.
11) Where screens or grilles are installed in air
intake and exhaust openings, the net free area of the
air intake or exhaust opening shall be equal to or
greater than the required cross-sectional area of the
duct served or such openings shall comply with Table 9.32.3.13.
12) Screens and grilles shall be of
corrosion-resistant material.
Table 9.32.3.13.
Area of Openings with Screens or Grilles
Forming Part of Sentence 9.32.3.13.(11) |
| Mesh Size of Screen or Grille, mm |
Area of Opening |
| Less than 4 |
3 times required area
of duct served |
| 4 to 6 |
2 times required area
of duct served |
| Larger than 6 |
Required area of duct
served |
9.32.4. Additional Protection Against Depressurization
9.32.4.1. Protection Requirements
1) Except as permitted by Sentence (8), additional make-up air for the actual appliance exhaust rate shall be provided for any appliance which
discharges air to the exterior at an installed rate
exceeding 0.5 air change per hour when it is located
within a dwelling unit that
a)contains a vented appliance that is subject
to back drafting (Naturally Aspirating Fuel Fired
Vented Appliance) (See A-9.32.3.8.(1)(a) in Appendix A), or
b)is located in an area where soil gas is
deemed to be a problem and incorporates no soil gas
mitigation system.
2) Where additional make-up air is required for
appliances described in Sentence (1), it shall be provided by
a)supply ducts sized in conformance with Table 9.32.3.8. for requirements of 60 l/s or less,
or
b)a supply fan rated to deliver outdoor air at
the rate of the installed exhaust
appliance.
3) The supply fan as required in Clause (2)(b) shall be interconnected with the exhaust fan for which
make-up air is required.
4) The outdoor air required by Sentence (3) shall be
a)tempered to at least 1°C
before being introduced to a normally
unoccupied area of the dwelling unit, or
b)tempered to at least 12°C before
being introduced to occupied areas either by
passive transfer grille or directly from
outside.
9.32.4.2. Carbon Monoxide Alarms
(See Appendix A.) 1) This Article applies to every building that contains a residential occupancy and that also contains
a)a fuel-burning appliance,
or
b)a storage garage.
2) Carbon monoxide alarms required by this
Article shall
a)conform to CSA 6.19, “Residential Carbon
Monoxide Alarming Devices,”
b)be equipped with an integral alarm which
satisfies the audibility requirements of CSA
6.19, “Residential Carbon Monoxide Alarming
Devices,”
c)have no disconnect switch between the
overcurrent device and the carbon monoxide
alarm, where the carbon monoxide alarm is
powered by the dwelling unit’s electrical system,
and
d)be mechanically fixed at a height
recommended by the manufacturer.
3) Where a fuel-burning appliance is installed in a suite of residential occupancy, a carbon monoxide alarm shall be installed either inside each bedroom,
or if outside, within 5 m, measured following
corridors and doorways, of each bedroom
door.
4) Where a fuel-burning appliance is installed in a service room that is not in a suite of residential occupancy, a carbon monoxide alarm shall be
a)either inside each bedroom, or if
outside, within 5 m, measured following
corridors and doorways, of each bedroom door in
every suite of residential occupancy that shares a wall or floor/ceiling assembly
with the service room, and
b)in the service room.
5) Where a storage garage is located in a building containing a residential occupancy, a carbon monoxide alarm shall be installed either
inside each bedroom, or if outside, within 5 m,
measured following corridors and doorways, of each
bedroom door in every suite of residential occupancy that shares a wall or floor/ceiling
assembly with the storage garage.