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.
9.32.1. 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) 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.
9.32.3. 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) 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.
9.32.4. 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.
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.