OBC 2006 › Division B
9.32.3.
Version 0 — in force 31 December 2006
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- Edition
- OBC_2006
- Division
- B
- Provision
- 9.32.3.
- Version
- v0
(1) This Regulation comes into force on December 31, 2006.
Read directly from the regulation's own commencement section.
O. Reg. 350/06 · commencement 2.2.1.1(1)
This version stayed in force until the next edition replaced it. What follows is that edition’s base regulation’s commencement — the takeover that ended this one.
(1) Subject to Sentences (2) and (3), this Regulation comes into force on January 1, 2014.
Read directly from the regulation's own commencement section.
O. Reg. 332/12 · commencement 4.4.1.1(1)
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Tell us what is wrong and we will verify & correct our mapping.
- Edition
- OBC_2006
- Division
- B
- Provision
- 9.32.3.
- Version
- v0
(1) This Regulation comes into force on December 31, 2006.
Read directly from the regulation's own commencement section.
O. Reg. 350/06 · commencement 2.2.1.1(1)
This version stayed in force until the next edition replaced it. What follows is that edition’s base regulation’s commencement — the takeover that ended this one.
(1) Subject to Sentences (2) and (3), this Regulation comes into force on January 1, 2014.
Read directly from the regulation's own commencement section.
O. Reg. 332/12 · commencement 4.4.1.1(1)
Provenance
OBC 1997 · continues from 9.32.3. — Pro
Base · O. Reg. 350/06 · ext← current
Original — base regulation
OBC 2012 · continues as 9.32.3. — Pro
9.32.3. — Mechanical Ventilation
Content not available for this version.
9.32.3.1. — General
(1) For the purposes of this Subsection a non-solid fuel-fired appliance shall be classified as,
(a) direct vented whereby the combustion air is supplied directly from the outdoors to the combustion chamber via a sealed passageway, and the products of combustion are exhausted directly outdoors through an independent sealed vent,
(b) mechanically vented induced draft whereby combustion air is supplied from within the building envelope and the products of combustion are positively conveyed to the outdoors by means of a dedicated sealed vent, or
(c) natural draft whereby combustion air is supplied from within the building envelope and the products of combustion are conveyed to the outdoors through a chimney or Type B vent.
(2) For the purposes of this Subsection a dwelling unit shall be categorized as,
(a) Type I when,
(i) all fuel-fired combustion appliances located in the dwelling unit are direct vented or except for fireplaces, are mechanically vented induced draft, and
(ii) the dwelling unit does not contain a solid fuel-fired combustion appliance,
(b) Type II when a solid fuel-fired combustion appliance is installed in a Type I dwelling unit,
(c) Type III when a mechanically vented induced draft non-solid fuel-fired fireplace or a natural draft appliance is present, or
(d) Type IV when electric space heating is present.
Text · e-Laws consolidated snapshot
9.32.3.2. — Required Mechanical Ventilation
(1) The mechanical ventilation system required in Article 9.32.1.2. shall comply with,
(a) Part 6, or
(b) this Subsection for a mechanical ventilation system in a Type I, Type II or Type IV dwelling unit.
Text · e-Laws consolidated snapshot
9.32.3.3. — Total Ventilation Capacity
(1) The minimum total ventilation capacity of the ventilation system required in Clauses 9.32.3.2.(1)(b) shall be the sum of the individual room capacities given in Table 9.32.3.3.
Editor's note
In the notes to Table-9.32.3.3., the footnote reference numbers are presented inline with a separating space; the e-Laws consolidation renders them as superscript abutting the text. The footnote text is identical.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 |
Room | Capacity, L/s |
Master bedroom(1) | 10 |
Other bedrooms | 5 |
Living room(2) | 5 |
Dining room(2) | 5 |
Kitchen | 5 |
Family room(2) | 5 |
Recreation room | 5 |
Basement(3) | 10 |
Other habitable rooms(4) | 5 |
Bathroom or water closet room | 5 |
Laundry room | 5 |
Utility room | 5 |
Notes to Table 9.32.3.3.:
(1)At least one bedroom in each dwelling unit shall be designated as the master bedroom.
(2)Ventilation capacities assigned to any combined living/dining or family/dining space shall be determined as if the spaces were individual rooms.
(3)Where a basement incorporates rooms of the types designated in this Table, the assigned ventilation capacities for each room shall be as specified for those types of rooms. Basement areas used for other purposes that exceed ⅔ of the total basement floor area shall be assigned a fan capacity of 10 L/s. Those that are less than ⅔ of the total floor area shall be assigned 5 L/s.
(4)Other habitable rooms shall be assigned a ventilation capacity of 5 L/s. This does not include spaces intended solely for access, egress, storage or service equipment.
9.32.3.4. — Principal Exhaust
(1) A principal exhaust fan shall be installed and shall be rated to provide not less than the capacity given in Table 9.32.3.4.A.
(2) Except as permitted in Sentence (3), the principal exhaust fan shall be controlled by a manual switch.
(3) A principal exhaust fan required under this Article may be controlled by a dehumidistat or other automatic control device where the manual switch required in Sentence (2) is capable of activating the fan regardless of the setting of the automatic control.
(4) The switches required in Sentences (2) and (3) shall be centrally located in the dwelling unit and shall be identified with the words VENTILATION FAN.
(5) The principal exhaust required in this Article may be provided by means of a heat recovery ventilator installed in accordance with Article 9.32.3.11.
(6) Where the installed capacity of the principal exhaust fan exceeds the minimum capacity required in Sentence (1) by more than 50%, the control required in Sentence (2) shall include provision to allow reduction of the flow to within ±10% of the minimum capacity specified in Sentence (1).
(7) Where an exhaust air intake for the principal exhaust fan is connected directly to the duct system of a forced air heating system or other central air circulating system, it shall,
(a) be connected to the return air side of the system, and
(b) be connected not less than 1 000 mm upstream from any outdoor air supply duct.
(8) Where an exhaust air intake for the principal exhaust fan is located in the kitchen, it shall be located in the ceiling or on the wall within 300 mm of the ceiling.
(9) Single or multiple exhaust ducts serving the principal exhaust fan required by Sentence (1) shall be sized according to Part 6 except that they may be sized according to Table 9.32.3.4.B where
(a) the longest total duct length, from intake grille to outdoor hood, does not exceed 12 m, and
(b) the number of elbows does not exceed 4, but, in any case, they shall not be smaller than recommended by the manufacturer of the fan.
(10) In applying Table 9.32.3.4.B.,
(a) where there is more than one exhaust air inlet duct connected directly to the fan, the diameter of the inlet ducts may be decreased by 25 mm, and
(b) where the exhaust duct is connected to the duct system of a forced air heating system, the duct diameter shall be increased by 25 mm.
Editor's note
As filed in O. Reg. 350/06, Sentence (9) of Article 9.32.3.4. cites 'Table 9.32.3.4.B' without a trailing period after the table letter ('they may be sized according to Table 9.32.3.4.B where'); the current e-Laws consolidation editorially supplies the trailing period ('Table 9.32.3.4.B.'), with no amending regulation making the change. This map preserves the citation as filed.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 |
Number of Bedrooms in Dwelling Unit | Capacity, L/s |
1 | 15 |
2 | 22.5 |
3 | 30 |
4 | 37.5 |
More than 4 | Part 6 design |
Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
Number of Bedrooms in Dwelling Unit | Minimum Exhaust Duct Diameter | |||
Ducts Connected to Inlet and Outlet of Principal Exhaust Fan | Ducts Connected to One Side Only of Principal Exhaust Fan | |||
Smooth Duct, mm | Flexible Duct, mm | Smooth Duct, mm | Flexible Duct, mm | |
1 | 100 | 125 | 100 | 125 |
2 | 125 | 150 | 125 | 150 |
3 | 125 | 150 | 150 | 175 |
4 | 150 | 175 | 150 | 175 |
More than 4 | Part 6 design | Part 6 design | Part 6 design | Part 6 design |
9.32.3.5. — Supplemental Exhaust
(1) Additional supplemental exhaust capacity shall be installed as necessary so that the total capacity of all kitchen, bathroom, water closet room and other supplemental exhaust air intakes is not less than the total ventilation capacity, as required in Article 9.32.3.3.v1, minus the principal exhaust fan capacity, as required in Article 9.32.3.4.v1
(2) An exhaust air intake shall be installed in each kitchen, bathroom and water closet room.
(3) 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 within 300 mm of the ceiling.
(4) Exhaust ducts serving the required kitchen, bathroom, water closet room and other supplemental exhaust air intakes shall be sized according to Part 6 except that they may be sized according to Table 9.32.3.5. where
(a) the total duct length does not exceed 9 m, and
(b) the number of elbows does not exceed 4, but, in any case, they shall not be smaller than recommended by the manufacturers of the fans.
(5) A supplemental exhaust fan required by this Article shall be controlled by a manual switch located in the room served by the exhaust fan.
(6) Where the supplemental exhaust is provided by an exhaust fan serving multiple exhaust air intakes required in rooms described in Sentence (2), the exhaust fan shall be controlled by a manual switch located in each room served by that exhaust fan and wired in parallel.
(7) Where the supplemental exhaust is provided by a principal exhaust fan serving multiple exhaust air intakes required in rooms described in Sentence (2), the principal exhaust fan shall be controlled by a manual switch located in each room served by that exhaust fan and wired in parallel with the manual switch required in Sentence 9.32.3.4.(5)v1.
(8) Where a supplemental fan required by this Article is controlled by a dehumidistat or other automatic control in addition to the manual switch required by Sentences (5) to (7), the manual switch shall be capable of activating the fan regardless of the setting of the automatic control.
(9) Supplemental exhaust required in this Article may be provided by means of a heat recovery ventilator installed in accordance with Article 9.32.3.11.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 | Column 3 |
Fan Capacity, L/s | Minimum Exhaust Duct Diameter(1) | |
Ducts Connected to Inlet and Outlet of Exhaust Fan, mm | Ducts Connected to One Side Only of Exhaust Fan, mm | |
25 | 125 | 125 |
50 | 150 | 150 |
Notes to Table 9.32.3.5.:
(1) Where flexible duct is used, the duct diameter shall be increased by 25 mm.
9.32.3.6. — Ventilation Systems Coupled with Forced Air Heating Systems
(1) This Article applies to a mechanical ventilation system in a dwelling unit that contains a forced air heating system and the forced air heating system is used for delivery of ventilation air.
(2) In a Type I dwelling unit, a ventilation supply inlet is not required.
(3) In a Type II dwelling unit, the mechanical ventilation system shall include a heat recovery ventilator, coupled to the forced air heating system, installed in accordance with Article 9.32.3.11.
(4) The forced air heating system circulation fan shall be controlled by a manual switch located adjacent to the ventilation fan switch required in Sentence 9.32.3.4.(4)v1.
(5) The switch required in Sentence (4) shall be identified by the words CIRCULATION FAN.
Text · e-Laws consolidated snapshot
9.32.3.7. — Ventilation Systems Not Coupled with Forced Air Heating Systems
(1) This Article applies to a mechanical ventilation system in a dwelling unit that,
(a) does not contains a forced air heating system, or
(b) contains a forced air heating system and the forced air heating system is not used for circulation of the ventilation air.
(2) The mechanical ventilation system shall introduce air to and circulate air throughout the dwelling unit in compliance with this Article.
(3) The mechanical system in this Article shall include a heat recovery ventilator installed in accordance with Article 9.32.3.11.
(4) Outdoor air shall be distributed by a ductwork system from the heat recovery ventilator required in Sentence (3) to each bedroom, to any storey without a bedroom and, if there is no storey without a bedroom, to the principal living area.
(5) A supply duct from the outdoors to the heat recovery ventilator required and a main distribution trunk duct shall be provided and shall be sized according to Part 6, except that, the supply duct and the main distribution trunk duct may be sized according to Table 9.32.3.7.A. where,
(a) the total duct length from the outdoor hood to any supply register does not exceed 21 m, and
(b) the total number of fittings does not exceed 8.
(6) The outside air supply duct required by Sentence (5) shall not be considered to provide combustion and/or dilution air to fuel-burning appliances.
(7) Branch supply ducts leading from the main distribution trunk duct required by Sentence (5) to the rooms to which outdoor air is to be distributed shall be provided and shall be sized according to Part 6 except that the branch supply ducts may be sized according to Table 9.32.3.7.B. where,
(a) the total duct length from outdoor hood to supply register does not exceed 21 m, and
(b) the total number of fittings does not exceed 8.
(8) In applying Sentence (7), where the dwelling unit has more than 4 bedrooms, ducting shall be sized according to Part 6.
(9) All branch supply ducts that are not fitted with diffusers with adjustable balance stops shall be supplied with accessible dampers that can be adjusted and fixed in their adjusted positions and that include devices to indicate the positions of the dampers.
(10) Provision shall be made for the free flow of air to all rooms by leaving gaps beneath doors, using louvred doors or installing grilles in doors.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 |
Number of Bedrooms in Dwelling Unit | Minimum Outdoor Air Supply and Main Distribution Trunk Duct Diameter, mm |
1 | 150 |
2 | 150 |
3 | 175 |
4 | 175 |
More than 4 | Part 6 design |
Column 1 | Column 2 | Column 3 |
Room, Space or Storey Served | Minimum Branch Supply Duct Diameter, mm | |
1 and 2 Bedroom Dwelling Units | 3 and 4 Bedroom Dwelling Units | |
Master bedroom | 10 | 100 |
Other bedrooms | 75 | 75 |
Storey with no bedrooms or living area | 75 | 100 |
9.32.3.8. — Protection Against Depressurization
(1) When determining the need to provide protection against depressurization, consideration must be given to,
(a) whether the presence of soil gas is deemed to be a problem, and
(b) the presence of solid fuel-fired combustion appliances.
(2) Where a solid fuel-fired combustion appliance is installed, the ventilation system shall include a heat recovery ventilator that is designed to operate so that the flow of exhaust air does not exceed the flow of intake air in any operating mode, and that complies with the requirements of Article 9.32.3.11.
Text · e-Laws consolidated snapshot
9.32.3.9. — Fan Ratings
(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 Procedure”.
(2) Sound 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 915, “Procedure for Loudness Rating of Residential Fan Products”.
(3) Capacity ratings for required fans shall be based on a static pressure differential of 50 Pa, 25 Pa or 7.5 Pa depending on whether the fan is installed with ductwork connected on both sides, one side or neither side, respectively.
(4) Except for heat recovery ventilators, exhaust fans required to make up any part of the total ventilation capacity required by Article 9.32.3.3.v1 shall have a sound rating not greater than that specified in Table 9.32.3.9.
(5) Required fans shall be installed according to the manufacturer's instructions.
(6) Mechanical ventilation devices shall conform to CSA C22.2 No. 113-M, “Fans and Ventilators”.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 | Column 3 |
Fan Application | Maximum Sound Rating, sones | |
Rated according to CAN/CSA-C260-M | Rated according to HVI 915 | |
Principal exhaust fan | 2.0 | 2.5 |
Supplemental exhaust fans installed in bathrooms and water closet rooms and their make-up air fans | 2.5 | 3.5 |
Supplemental exhaust fans installed in kitchens and their make-up air fans | no rating required | no rating required |
9.32.3.10. — Ducts
(1) Ventilation ducts shall conform to the requirements of Part 6 for supply ducts except that exhaust ducts that serve only a bathroom or water closet room may be of combustible material provided the duct is 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 or is adjacent to unheated space, the duct shall be insulated to not less than RSI 0.5.
(4) Where a supply duct carrying outdoor air that is not tempered or not mixed with indoor air passes through heated space, it shall be insulated to not less than RSI 0.5 except that, where such a duct is exposed in the heated space for more than 3 m of length in the heated space, it shall be insulated to not less than the values listed in Table 9.32.3.10.A.
(5) A kitchen exhaust duct not equipped with a filter at the inlet end shall be designed and installed so that the entire duct can be cleaned.
(6) Ductwork for range hoods and range-top fans shall be of noncombustible, corrosion-resistant material and shall lead directly to the outdoors without connection to other exhaust fans or ducts.
(7) Ductwork for range hoods and range-top fans shall be equipped with a grease filter at the intake.
(8) All ductwork shall be permanently supported or clipped to prevent sagging, excessive movement and vibration.
(9) All ducting connected to supply and exhaust fans shall be constructed so as to inhibit air leakage at joints.
(10) Where rectangular duct is used in place of round duct, it shall be selected according to Table 9.32.3.10.B.
Editor's note
This map follows the as-filed text of O. Reg. 350/06, whose member dimensions in the tables under Article 9.32.3.10. use the letter 'x' (e.g. '82 x 250'). The e-Laws consolidation editorially substitutes the multiplication sign '×'; no amending regulation makes this change.
Text · e-Laws consolidated snapshot
Column 1 | Column 2 |
Outside Winter Design Temperature as per Supplementary Standard SB-1(1), °C | Minimum Thermal Resistance, RSI |
–7 to –11 | 0.5 |
–12 to –17 | 0.9 |
–18 to –24 | 1.2 |
–25 to –29 | 1.4 |
–30 to –34 | 1.8 |
–35 and colder | 2.1 |
Notes to Table 9.32.3.10.A:
(1) The outside winter design temperatures shall be those listed for the January 2.5 percent values.
Column 1 | Column 2 | Column 3 | Column 4 | Column 5 |
Required Round Duct Size, mm | Permitted Equivalent Rectangular Duct Size, mm | |||
Stack Duct | 100 mm Depth | 125 mm Depth | 150 mm Depth | |
75 | 82 × 250 | 57 × 100 | ||
100 | 82 × 250 | 89 × 100 | 75 × 125 | 75 × 150 |
125 | 82 × 250 | 125 × 100 | 100 × 125 | 89 × 150 |
150 | 82 × 300 | 200 × 100 | 150 × 125 | 125 × 150 |
175 | 82 × 350 | 275 × 100 | 200 × 125 | 175 × 150 |
More than 175 | Part 6 design | Part 6 design | Part 6 design | Part 6 design |
9.32.3.11. — Heat Recovery Ventilators
(1) Where a heat recovery ventilator is installed to provide all or part of the requirements of this Subsection, this Article shall apply.
(2) Heat recovery ventilators shall be designed to provide a minimum 55% sensible heat recovery efficiency when tested to the low temperature thermal and ventilation performance test method set out in CAN/CSA-C439, “Rating the Performance of Heat/Energy-Recovery Ventilators”, at a Station 1 test temperature of -25°C at an air flow not less than 30 L/s.
(3) Where a heat recovery ventilator is connected to a forced air heating system, the supply side of the ventilator shall be directly connected to the return air side of the forced air heating system.
(4) Two or more heat recovery ventilators shall not be connected in parallel air flow to a common air supply duct unless specifically recommended by the manufacturer.
(5) Two or more heat recovery ventilators shall not be connected in parallel air flow to a common downstream exhaust duct.
(6) Heat recovery ventilators installed in unheated spaces shall be installed so as to avoid condensation of moisture on fans and motors in exhaust air, in accordance with the manufacturer's instructions.
(7) All start-up procedures recommended by the manufacturer including air balancing and air-flow determination shall be followed.
(8) Free flow of condensate shall be provided in accordance with the manufacturer's recommendations or, in their absence, a condensate drain of minimum ½ inch nominal pipe size pitched in the direction of flow and complete with a trap or condensate pump with sufficient capacity shall be installed.
(9) 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.
(10) When operating at the rate required in Article 9.32.3.4.v1, the supply and exhaust airflow rates of the heat recovery ventilator shall be balanced so that the value of the lesser flow shall be at least 90% of the value of the greater flow, unless otherwise recommended by the manufacturer.
Text · e-Laws consolidated snapshot
9.32.3.12. — Outdoor Intake and Exhaust Openings
(1) Separate air intake and exhaust outlet openings, when located on the same wall or roof, shall be installed so as to avoid contamination of the ventilation air by the exhaust air.
(2) Intake openings shall be located so as to avoid contamination of the ventilation air from other local sources such as automobile exhausts and exhaust from adjacent buildings.
(3) The distance from the bottom of an air intake opening to finished ground level 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.
(4) 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.
(5) Air intakes shall be clearly labelled as such for identification from locations outside the dwelling unit.
(6) The distance from the bottom of an exhaust outlet to finished ground level or to any nearer and lower permanent horizontal surface shall be not less than 100 mm.
(7) 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.
(8) Air intake openings shall incorporate screens or grilles to protect against the entry of animals and insects.
(9) Except for exhaust outlets serving heat recovery ventilators, exhaust outlets shall incorporate backdraft dampers.
(10) Except for clothes dryers, exhaust outlets shall be fitted with screens of mesh not larger than 15 mm, except where climatic conditions may require larger openings.
(11) Where a screen or grille required by Sentences (8) and (10) has a screen mesh less than 6 mm, the screen or grille shall be removable for cleaning.
(12) The gross area of the screens or grilles installed in intake and exhaust openings shall be three times that of the duct served.
(13) Screens and grilles shall be of corrosion-resistant material.
(14) The net free area of an air intake or exhaust outlet shall be equal to or greater than the cross-sectional area of the duct served.
Text · e-Laws consolidated snapshot
9.32.3.13. — Installation
(1) Installation of fans and heat recovery ventilators shall be in accordance with manufacturer's instructions for minimizing noise and vibration transmission and achieving the required sound rating.
(2) Where flow-regulating dampers are required, they shall be adjustable and accessible without requiring the removal of fans, motors, or insulating materials and without the need for specialized tools.
(3) Ventilation equipment shall be accessible for inspection, maintenance, repair and cleaning.
(4) Ventilation equipment installed in unheated spaces shall be installed so as to avoid condensation of moisture on fans and motors in accordance with the manufacturer's instructions.
Text · e-Laws consolidated snapshot
Provenance
OBC 1997 · continues from 9.32.3. — Pro
Base · O. Reg. 350/06 · ext← current
Original — base regulation
OBC 2012 · continues as 9.32.3. — Pro