OBC VOLUME 2 · SUPPLEMENTARY STANDARD SB-12Updated for the 2024 Ontario Building Code
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SB-12 — Energy Efficiency for Housing
Supplementary Standard SB-12 ("Energy Efficiency for Housing") forms part of Volume 2 of the 2024 Ontario Building Code. The full text is reproduced below with a linked table of contents.
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2024MMA Supplementary Standard SB-12
SB-12 Energy Efficiency for Housing
Chapter 1 General
1.1.Scope
1.1.1. Energy Efficiency Compliance ..................................................................................................................................................................... 5
1.2.Application
1.2.1. Application of Supplementary Standard SB-12 ......................................................................................................................................... 6
1.3.Terms and Abbreviations
1.3.1. Definitions of Words and Phrases ............................................................................................................................................................... 6
1.3.2. Symbols and Other Abbreviations .............................................................................................................................................................. 7
1.4.Referenced Documents and Organizations
1.4.1. Referenced Documents ................................................................................................................................................................................ 7
1.4.2. Abbreviations ................................................................................................................................................................................................ 8
e1 Chapter 2 Reserved
Chapter 3 Acceptable Solutions for Energy Efficiency Compliance
3.1.Methods for Achieving Energy Efficiency Compliance
3.1.1. Prescriptive Compliance Packages ............................................................................................................................................................. 10
3.1.2. Performance Compliance ............................................................................................................................................................................. 34
3.1.3. Other Acceptable Compliance Methods ..................................................................................................................................................... 36
2024MMA Supplementary Standard SB-12
Page 2 • SB-12
2024MMA Supplementary Standard SB-12
e1 FOREWORD1
This Supplementary Standard includes design options regarding the energy efficiency of a building or part of a building of
residential occupancy that is within the scope of Part 9 and is intended for occupancy on a continuing basis during the
winter months. Conformance with the options in this Supplementary Standard is one method of demonstrating compliance
with the requirements in Sentence 12.2.1.2.(3) of the Building Code. The options in this Supplementary Standard are
intended to recognize the needs of consumers and the building industry for predictable prescriptive and flexible
performance-based solutions.
The first edition of this Supplementary Standard was published in 2009. The energy efficiency levels achieved in that
edition were intended to meet or exceed, on a systematic basis, the EnerGuide 80 level of energy efficiency that would be
met by model analogues evaluated against the NRCan “EnerGuide for New Houses: Administrative and Technical
Procedures” (2005). The editions published in 2012 and 2013 included certain trade-off options in recognition of the
Energy Star program that expanded the number of building component and assembly permutations considered to represent
acceptable solutions. The September 2013 also included a new “Chapter 3” with compliance packages that demonstrated
how to achieve an additional energy efficiency level increase of 15% over the requirements that took effect on January 1,
2012.
The July 7th, 2016 update of the Supplementary Standard was primarily intended to update the compliance packages set
out in Chapter 3. Changes include the identification of credits based on airtightness. Other changes include the recognition
of the technical requirements of Energy Star and R2000 programs as design options for meeting the energy efficiency
requirements of the Building Code.
This edition of SB-12 is still the same edition released on July 7, 2016 except that the requirements applicable on or before
July 7, 2016 have been removed and marked as “Reserved”.
Labelling is not required to demonstrate compliance with this Supplementary Standard.
1 Unless otherwise indicated, all Building Code references in this foreword refer to provisions located in Division B of the Building Code.
2024MMA Supplementary Standard SB-12
SUMMARY OF THE CONTENTS OF SB-12
Chapter 1: General
This Chapter sets out the scope and application of this Supplementary Standard.
e1 Chapter 2: Reserved
e1 Chapter 3: Acceptable Solutions for Achieving Energy Efficiency
This Chapter contains acceptable solutions for achieving energy efficiency compliance with Clause 12.2.1.2.(3)(b) of
Division B of the Building Code and applies to construction of buildings. Conformance with one of the prescriptive
compliance packages in Subsection 3.1.1., the performance compliance method in Subsection 3.1.2. or Energy Star or
R2000 requirements as specified in Subsection 3.1.3. of this Supplementary Standard is intended to achieve, on a systemic
basis, an energy efficiency performance level that exceeds the energy efficiency requirements of Sentence 12.2.1.1.(3) of
Division B of O. Reg. 332/12 (2012 Building Code) as it read on December 31, 2024, by 15%.
Page 4 • SB-12
2024MMA Supplementary Standard SB-12
Chapter 1
General
Section 1.1. Scope
1.1.1.1.Energy Efficiency
(1) This Section is concerned with the energy used by buildings as a result of
(a) the design and construction of the building envelope, and
(b) the design and construction or specification of systems and equipment for
(i) heating, ventilating or air-conditioning, and
(ii) service water heating.
e1 (2) Reserved.
(3) Compliance with Chapters 1 and 3 of this Supplementary Standard shall be deemed to meet the energy efficiency
requirements in accordance with Sentence 12.2.1.2.(3) of Division B of the Building Code.
(4) The energy efficiency of existing buildings shall comply with
(a) Part 10 of Division B of the Building Code with respect to change of use, or
(b) Part 11 of Division B of the Building Code for renovation.
1.1.1.2.Reserved
e1 1.1.1.3. Compliance Options
(1) The energy efficiency of a building or part of a building of residential occupancy that is within the scope of Part 9 of
Division B of the Building Code and is intended for occupancy on a continuing basis during the winter months shall
comply with
(a) Subsection 3.1.1. (Prescriptive Compliance Packages) of Chapter 3,
(b) Subsection 3.1.2. (Performance Compliance) of Chapter 3, or
(c) Subsection 3.1.3. (Other Acceptable Compliance Methods) of Chapter 3.
(2) Factory-built modular homes manufactured before January 1, 2017 in accordance with the Building Code as it read
on December 31, 2016 shall be deemed to be in compliance with Sentence (1).
2024MMA Supplementary Standard SB-12
Section 1.2. Application
1.2.1.1.Energy Efficiency Design
(1) The energy efficiency of a building or part of a building of residential occupancy that is within the scope of Part 9 of
Division B of the Building Code and is intended for occupancy on a continuing basis during the winter months shall
comply with this Supplementary Standard in accordance with Subsection 12.2.1. of Division B of the Building Code.
Section 1.3. Terms and Abbreviations
1.3.1.1.Non-Defined Terms
(1) Definitions of words and phrases used in this Supplementary Standard that are not included in the list of definitions
in Articles 1.4.1.2. and 1.4.1.3. of Division A of the Building Code and are not defined in another provision of the
Building Code shall have the meanings that are commonly assigned to them in the context in which they are used, taking
into account the specialized use of terms by the various trades and professions to which the terminology applies.
1.3.1.2.Defined Terms
(1) Each of the words and terms in italics in this Supplementary Standard has the same meaning as in subsection 1(1) of
the Building Code Act, 1992 or Sentence 1.4.1.2.(1) of Division A of the Building Code.
(2) In this Supplementary Standard,
common space means all spaces required to be conditioned spaces in accordance with the requirements of the Building
Code that are not within a suite but does not include crawl spaces and vertical service spaces;
effective RSI value means the effective thermal resistance, which is the inverse of the overall thermal transmittance of a
building assembly, in (m2•K)/W; (See Appendix A.)
fenestration means a building envelope assembly that transfers visible light, such as a window, clerestory, skylight,
translucent wall panel, glass block assembly, transom, sidelight, sliding or swinging glass door, or glazed insert in a door,
and includes the frames and other components of the assembly;
overall coefficient of heat transfer means overall thermal transmittance of fenestration and, for greater certainty, includes
all components of fenestration;
overall thermal transmittance means the rate, in W/(m2•K), at which heat is transferred through all components of a
building envelope assembly that is subject to temperature differences and includes interior and exterior air films that are
in contact with the assembly, but does not include exterior air films where the assembly is in contact with soil.
Page 6 • SB-12
1.3.2.1.Symbols and Other Abbreviations
(1) Where used in this Supplementary Standard, a symbol or abbreviation listed in Column 2 of Table 1.4.2.1. of
Division A of the Building Code shall have the meaning listed opposite it in Column 3.
(2) The abbreviations listed in Column 2 of Table 1.3.2.1. shall also apply to this Supplementary Standard and shall
have the meaning listed opposite it in Column 3.
Table 1.3.2.1.
Abbreviations
Forming Part of Sentence 1.3.2.1.(2)
Item Abbreviation Meaning
1 ACH air changes per hour
2 AFUE annual fuel utilization efficiency
3 ASHP air source heat pump
4 ci continuous insulation (See Appendix A.)
5 EF energy factor
6 HRV heat or energy recovery ventilator
7 HSPF heating seasonal performance factor
8 ICF insulating concrete form
9 IP inch-pound - imperial
10 K Kelvin
11 NLA normalised leakage area
12 NLR normalised leakage rate
13 SI standard international – metric
14 SRE sensible recovery efficiency
15 TPF thermal performance factor
overall thermal transmittance or overall
16 U-Value
coefficient of heat transfer
Column 1 2 3
Section 1.4. Referenced Documents and Organizations
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
1.4.1.1.Effective Date
(1) Unless otherwise specified in this Supplementary Standard, the documents referenced in this Supplementary
Standard shall include all amendments, revisions and supplements effective to October 31, 2011.
1.4.1.2.Applicable Editions
(1) Where documents are referenced in this Supplementary Standard, they shall be the editions designated in
Column 2 of Table 1.4.1.2.
e1 Table 1.4.1.2.
Referenced Documents
Forming Part of Sentence 1.4.1.2.(1)
Supplementary Standard
Issuing Agency Document Number Title of Document
Reference
Determination of the Airtightness of Building Envelopes by
CGSB CAN/CGSB 149.10-M86 3.1.1.4.(2)
the Fan Depressurization Method
Fenestration Energy Performance Evaluation of Windows
CSA CAN/CSA-A440.2-09 3.1.1.9.(2)
and Sliding Glass Doors
Test Method for Measuring Efficiency and Pressure Loss of
CSA B55.1-12 3.1.1.12.(4)
Drain Water Heat Recovery Units
CSA B55.2-12 Drain Water Heat Recovery Units 3.1.1.12.(3)
Test Method for Determining the Performance
CSA CAN/CSA-P.9-11 3.1.1.3.(7)
of Combined Space and Water Heating Systems (Combos)
NFRC NFRC 100-2010 Procedure for Determining Fenestration Product U-factors 3.1.1.9.(2)
Procedure for Determining Fenestration Product Solar Heat
NFRC NFRC 200-2010 Gain Coefficient and Visible Transmittance at Normal 3.1.1.8.(2)
Incidence
NRCan NRCan January 2012 Energy Star for New Homes Standard Version 12.6 3.1.3.1.(1)
EnerGuide Rating System Technical Procedures
NRCan NRCan November 2015 3.1.1.4.(2); 3.1.2.1.
Version 15.1
NRCan NRCan 2012 2012 R-2000 Standard 3.1.3.1.(2)
Column 1 2 3 4
Notes to Table 1.4.1.2.:
(1) NFRC refers to the National Fenestration Rating Council. (See Appendix A.)
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
1.4.2.1.Abbreviations of Proper Names
(1) Where used in this Supplementary Standard, abbreviations of proper names listed in Column 1 of Table 1.3.2.1. of
Division B of the Building Code shall have the meaning assigned opposite it in Column 2.
Page 8 • SB-12
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2024MMA Supplementary Standard SB-12
e1
Chapter 2
Reserved
2024MMA Supplementary Standard SB-12
Chapter 3
e1 Acceptable Solutions for Energy
Efficiency Compliance
Section 3.1. Methods for Achieving Energy Efficiency
Compliance
3.1.1.1.Energy Efficiency
(1) Except as provided in Articles 3.1.1.4. to 3.1.1.11., the building shall conform to
(a) Article 3.1.1.2. if the building is located in Zone 1 with less than 5000 heating degree days, or
(b) Article 3.1.1.3. if the building is located in Zone 2 with 5000 or more heating degree days.
(2) Except as required in Sentence (5), all walls, ceilings, floors, windows and doors that separate heated space from
unheated space, the exterior air or the exterior soil shall have thermal resistance ratings conforming to this Subsection.
(3) Where specified in compliance packages in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C, space
heating equipment, domestic water heating equipment and heat or energy recovery ventilators shall be provided and have
the efficiency rating conforming to this Subsection. (See Appendix A.)
(4) Except as required in Sentence (5), insulation shall be provided between heated and unheated spaces and between
heated spaces and the exterior in accordance with this Chapter.
(5) A building envelope assembly that separates a conditioned space from an adjoining storage garage shall be treated
as an assembly separating heated space from exterior, even if the storage garage is intended to be heated.
(6) Reflective surfaces of insulating materials shall not be considered in calculating the thermal resistance of building
assemblies.
(7) Except as provided in Sentences (8) and 3.1.1.11.(3), where the ratio of the gross area of windows, sidelights,
skylights, glazing in doors and sliding glass doors to the gross area of peripheral walls measured from grade to the top of
the upper most ceiling is not more than 17%, the building shall comply with a compliance package selected from Tables
3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C, and Table 3.1.1.11. (See Appendix A.)
Page 10 • SB-12
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2024MMA Supplementary Standard SB-12
(8) Except as permitted in Sentences 3.1.1.11.(3), where the ratio of the gross area of windows, sidelights, skylights,
glazing in doors and sliding glass doors to the gross area of peripheral walls measured from grade to the top of the upper
most ceiling is more than 17% but not more than 22%, the building shall comply with a compliance package selected
from Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C and Table 3.1.1.11. and the overall coefficient of heat
transfer of the fenestration shall be upgraded to
(a) 1.6 where 1.8 is required by the selected compliance package or permitted by Article 3.1.1.4.,
(b) 1.4 where 1.6 is required by the selected compliance package or permitted by Article 3.1.1.4.,
(c) 1.2 where 1.4 is required by the selected compliance package or permitted by Article 3.1.1.4., and
(d) 1.0 where 1.2 is required by the selected compliance package or permitted by Article 3.1.1.4.
(See Appendix A.)
(9) Where the ratio of gross area of windows, sidelights, skylights, glazing in doors and sliding glass doors to the gross
area of peripheral walls measured from grade to the top of the upper most ceiling is more than 22%, the building shall
comply with Subsection 3.1.2. (See Appendix A.)
(10) Where a dwelling unit has a walkout basement, the thermal performance level of the exterior basement wall shall be
not less than that required for the above grade wall for
(a) the basement wall containing the door opening, and
(b) any basement wall that has an exposed wall area above the ground level exceeding 50% of that basement wall area.
(11) For a conditioned space, the exterior building envelope or envelope that separates conditioned space from
unconditioned space shall conform to the applicable values specified in Articles 3.1.1.2. and 3.1.1.3.
(12) Where an enclosed unheated space is separated from a heated space by glazing, the unheated enclosure may be
considered to provide a thermal resistance of RSI 0.16.
(13) Where a compliance package in Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C, or Table 3.1.1.11.
specifies a nominal RSI value, effective RSI value and U-Value for a component specified in Column 1 of the Table and
the component conforms to one of the thermal values, the component need not conform to the other thermal values
specified for the component.
(14) Insulation in the rim joist or header area where the floor assembly and wall assembly intersect shall have a thermal
value not less than the thermal value of the insulation in the walls above grade.
(15) Where a compliance package in Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C, or Table 3.1.1.11.
specifies an overall coefficient of heat transfer and an energy rating value for a fenestration component specified in
Column 1 of the Table and the component conforms to one of the thermal values, the component need not conform to the
other thermal value specified for the component.
(16) Ventilation systems serving dwelling units shall have a heat or energy recovery ventilator. (See Appendix A)
(17) Except as provided in Sentence (18), a building is permitted to be designed in conformance with any of the
compliance packages available for the climate zone that the building is located in, if the primary space heating of the
building is supplied by
(a) a wood burning appliance,
(b) an earth energy system, or
(c) an air or water source heat pump that does not use electric resistance as a back-up heat source.
(18) For the purpose of Sentence (17), the requirements in the compliance packages for space heating equipment do not
apply.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
(19) Heat or energy recovery ventilators specified in compliance packages in Tables 3.1.1.2.A to 3.1.1.2.C and Tables
3.1.1.3.A to 3.1.1.3.C, shall meet
(a) the requirements of Article 9.32.3.12. of Division B of the Building Code, and
(b) the minimum SRE required in this Chapter based on a test temperature of 0°C at an air flow rate equal to the
principle exhaust flow but need not exceed 30 L/s.
(20) Building envelope components that enclose a common space and are exposed to exterior or unconditioned space
shall conform to this Subsection.
(21) Heating, ventilating, air-conditioning and lighting systems serving common spaces need not comply with this
Subsection but shall comply with the other parts of the Building Code.
(22) Drain water heat recovery units shall be installed in accordance with Article 3.1.1.12.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.1.2.Energy Efficiency for Buildings Located in Zone 1
(1) Except as provided in Sentences (2) to (5) and (7), the minimum thermal performance of building envelope
assemblies and equipment shall conform to Table 3.1.1.2.A.
(2) Except for solid fuel-burning space heating equipment and except as provided in Sentence (5), where the space
heating equipment efficiency is 84% or more but less than 92%, the minimum thermal performance of the building
envelope assemblies and equipment shall conform to Table 3.1.1.2.B.
(3) Where electric space heating is used, the minimum thermal performance of the building envelope assemblies and
equipment shall conform to Table 3.1.1.2.C.
(4) Except as provided in Sentence 3.1.1.1.(17), where the space heating equipment efficiency cannot meet the
requirements of the applicable compliance packages, energy efficiency compliance shall be achieved in accordance with
Subsection 3.1.2. of this Supplementary Standard.
(5) Where an ICF wall assembly is installed as an above and below grade wall assembly that has minimum RSI 1.76
(R10) insulation on the interior surface of the concrete and minimum RSI 1.76 (R10) insulation on the exterior surface,
the ICF wall is deemed to comply with the thermal values set out for walls in the compliance packages in Table 3.1.1.2.A.
(See Appendix A.)
(6) An ICF wall assembly described in Sentence (5) is permitted to be used in lieu of basement walls that require
insulation value of RSI 3.52 ci (R20) or less. (See Appendix A.)
(7) Building designs that utilize combined space heating and domestic water heating systems are permitted to use
compliance package A4, provided that
(a) the water heating equipment has a minimum of 0.80 EF, 90% AFUE, or is a condensing type, or
(b) the combination of equipment has a minimum of 0.85 TPF determined in accordance with CAN/CSA-P.9, “Test
Method for Determining the Performance of Combined Space and Water Heating Systems (Combos)”.
Page 12 • SB-12
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2024MMA Supplementary Standard SB-12
Table 3.1.1.2.A (SI)
ZONE 1 - Compliance Packages for Space Heating Equipment with AFUE ≥ 92%
Forming Part of Sentence 3.1.1.2.(1)
Compliance Package
Component Thermal Values(8)
A1 A2 A3 A4 A5 A6
Min. Nominal RSI(1) 10.56 10.56 8.80 10.56 8.80 10.56
Ceiling with Attic Space Max. U(2) 0.096 0.096 0.115 0.096 0.115 0.096
Min. Effective RSI(2) 10.43 10.43 8.67 10.43 8.67 10.43
Min. Nominal RSI(1) 5.46 5.46 5.46 5.46 5.46 5.46
Ceiling Without Attic
Max. U(2) 0.205 0.205 0.205 0.205 0.205 0.205
Space
Min. Effective RSI(2) 4.87 4.87 4.87 4.87 4.87 4.87
Min. Nominal RSI(1) 5.46 5.46 6.16 5.46 6.16 5.46
Exposed Floor Max. U(3) 0.190 0.190 0.177 0.190 0.177 0.190
Min. Effective RSI(3) 5.25 5.25 5.64 5.25 5.64 5.25
3.34 + 2.46 + 3.87 + 3.34 + 3.87 +
Min. Nominal RSI(1) 3.87
0.88 ci 1.32 ci 0.88 ci 0.88 ci 0.88 ci
Walls Above Grade
Max. U(3) 0.333 0.280 0.305 0.265 0.280 0.265
Min. Effective RSI(3) 3.00 3.58 3.28 3.77 3.58 3.77
2.11 + 2.11 +
Min. Nominal RSI(1) 3.52 ci 3.52 ci 3.52 ci 3.52 ci
1.76 ci 0.88 ci
Basement Walls(6)
Max. U(4) 0.269 0.272 0.269 0.269 0.355 0.269
Min. Effective RSI(4) 3.72 3.67 3.72 3.72 2.81 3.72
Below Grade Slab Min. Nominal RSI(1) — — — — — —
Entire Surface > 600 mm Max. U(4) — — — — — —
Below Grade Min. Effective RSI(4) — — — — — —
Heated Slab or Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
Slab ≤ 600 mm Below Max. U(4) 0.510 0.510 0.510 0.510 0.510 0.510
Grade Min. Effective RSI(4) 1.96 1.96 1.96 1.96 1.96 1.96
Edge of Below Grade
Slab ≤ 600 mm Below Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
Grade
Windows and Sliding Max. U(5) 1.6 1.6 1.4 1.6 1.6 1.6
Glass Doors Energy Rating 25 25 29 25 25 25
Skylights Max. U(5) 2.8 2.8 2.8 2.8 2.8 2.8
Space Heating
Min. AFUE 96% 96% 94% 96% 94% 92%
Equipment
HRV Min. SRE 75% 75% 81% 75% 70% 65%
Domestic Water Heater(7) Min. EF 0.80 0.70 0.67 0.67 0.80 0.80
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.2.A (SI):
(1) The values listed are minimum Nominal RSI-Values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where RSI 2.11 +
0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.2.A (IP)
ZONE 1 - Compliance Packages for Space Heating Equipment with AFUE ≥ 92%
Forming Part of Sentence 3.1.1.2.(1)
Compliance Package
Component Thermal Values(8)
A1 A2 A3 A4 A5 A6
Min. Nominal R(1) 60 60 50 60 50 60
Ceiling with Attic Space Max. U(2) 0.017 0.017 0.020 0.017 0.020 0.017
Min. Effective R(2) 59.22 59.22 49.23 59.22 49.23 59.22
Min. Nominal R(1) 31 31 31 31 31 31
Ceiling Without Attic
Max. U(2) 0.036 0.036 0.036 0.036 0.036 0.036
Space
Min. Effective R(2) 27.65 27.65 27.65 27.65 27.65 27.65
Min. Nominal R(1) 31 31 35 31 35 31
Exposed Floor Max. U(3) 0.034 0.034 0.031 0.034 0.031 0.034
Min. Effective R(3) 29.80 29.80 32.02 29.80 32.02 29.80
Min. Nominal R(1) 22 19 + 5 ci 14 + 7.5 ci 22 + 5 ci 19 + 5 ci 22 + 5 ci
Walls Above Grade Max. U(3) 0.059 0.049 0.054 0.047 0.049 0.047
Min. Effective R(3) 17.03 20.32 18.62 21.40 20.32 21.40
Min. Nominal R(1) 20 ci 12 +10 ci 20 ci 20 ci 12 + 5 ci 20 ci
Basement Walls(6) Max. U(4) 0.047 0.048 0.047 0.047 0.063 0.047
Min. Effective R(4) 21.12 20.84 21.12 21.12 15.96 21.12
Below Grade Slab Min. Nominal R(1) — — — — — —
Entire Surface > 600 mm Max. U(4) — — — — — —
Below Grade Min. Effective R(4) — — — — — —
Heated Slab or Min. Nominal R(1) 10 10 10 10 10 10
Slab ≤ 600 mm Below Max. U(4) 0.090 0.090 0.090 0.090 0.090 0.090
Grade Min. Effective R(4) 11.13 11.13 11.13 11.13 11.13 11.13
Edge of Below Grade Slab
Min. Nominal R(1) 10 10 10 10 10 10
≤ 600 mm Below Grade
Windows and Sliding Max. U(5) 0.28 0.28 0.25 0.28 0.28 0.28
Glass Doors Energy Rating 25 25 29 25 25 25
Skylights Max. U(5) 0.49 0.49 0.49 0.49 0.49 0.49
Space Heating Equipment Min. AFUE 96% 96% 94% 96% 94% 92%
HRV Min. SRE 75% 75% 81% 75% 70% 65%
Domestic Water Heater (7) Min. EF 0.80 0.70 0.67 0.67 0.80 0.80
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.2.A (IP):
(1) The values listed are minimum Nominal R-Values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
Page 14 • SB-12
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.2.B (SI)
ZONE 1 - Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92%
Forming Part of Sentence 3.1.1.2.(2)
Compliance Package
Component Thermal Values(8)
B1 B2 B3 B4 B5 B6
Min. Nominal RSI(1) 8.80 8.80 8.80 10.56 + HH 8.80 10.56
Ceiling with Attic Space Max. U(2) 0.115 0.115 0.115 0.095 0.115 0.096
Min. Effective RSI(2) 8.67 8.67 8.67 10.55 8.67 10.43
Min. Nominal RSI(1) 5.46 5.46 5.46 5.46 5.46 5.46
Ceiling Without Attic Space Max. U(2) 0.205 0.205 0.205 0.205 0.205 0.205
Min. Effective RSI(2) 4.87 4.87 4.87 4.87 4.87 4.87
Min. Nominal RSI(1) 6.16 6.16 6.16 5.46 6.16 5.46
Exposed Floor Max. U(3) 0.177 0.177 0.177 0.190 0.177 0.190
Min. Effective RSI(3) 5.64 5.64 5.64 5.25 5.64 5.25
3.87 + 3.87 + 3.87 + 3.87 + 3.34 + 3.34 +
Min. Nominal RSI(1)
0.88 ci 0.88 ci 1.32 ci 1.32 ci 1.76 ci 1.76 ci
Walls Above Grade
Max. U(3) 0.265 0.265 0.238 0.238 0.224 0.224
Min. Effective RSI(3) 3.77 3.77 4.21 4.21 4.46 4.46
2.11 + 2.11 +
Min. Nominal RSI(1) 3.52 ci 3.52 ci 3.52 ci 3.52 ci
1.76 ci 1.76 ci
Basement Walls(6)
Max. U(4) 0.269 0.272 0.269 0.272 0.269 0.269
Min. Effective RSI(4) 3.72 3.67 3.72 3.67 3.72 3.72
Below Grade Slab Min. Nominal RSI(1) — — — — — 1.76
Entire Surface > 600 mm Max. U(4) — — — — — 0.51
Below Grade Min. Effective RSI(4) — — — — — 1.96
Heated Slab or Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
Slab ≤ 600 mm Below Max. U(4) 0.51 0.51 0.51 0.51 0.51 0.51
Grade Min. Effective RSI(4) 1.96 1.96 1.96 1.96 1.96 1.96
Edge of Below Grade Slab
Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
≤ 600 mm Below Grade
Windows and Sliding Max. U(5) 1.6 1.4 1.4 1.2 1.4 1.2
Glass Doors Energy Rating 25 29 29 34 29 34
Skylights Max. U(5) 2.8 2.8 2.8 2.8 2.8 2.8
Space Heating Equipment Min. AFUE 90% 90% 87% 87% 84% 84%
HRV Min. SRE 75% 70% 70% 75% 75% 81%
Domestic Water Heater(7) Min. EF 0.66 0.62 0.66 — 0.66 —
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.2.B (SI):
The following definition applies: HH = 250 mm high heel
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where RSI 2.11 +
0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.2.B (IP)
ZONE 1 - Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92%
Forming Part of Sentence 3.1.1.2.(2)
Compliance Package
Component Thermal Values(8)
B1 B2 B3 B4 B5 B6
Min. Nominal R(1) 50 50 50 60 + HH 50 60
Ceiling with Attic Space Max. U(2) 0.020 0.020 0.020 0.016 0.020 0.017
Min. Effective R(2) 49.23 49.23 49.23 59.90 49.23 59.22
Min. Nominal R(1) 31 31 31 31 31 31
Ceiling Without Attic
Max. U(2) 0.036 0.036 0.036 0.036 0.036 0.036
Space
Min. Effective R(2) 27.65 27.65 27.65 27.65 27.65 27.65
Min. Nominal R(1) 35 35 35 31 35 31
Exposed Floor Max. U(3) 0.031 0.031 0.031 0.034 0.031 0.034
Min. Effective R(3) 32.02 32.02 32.02 29.80 32.02 29.80
Min. Nominal R(1) 22 + 5 ci 22 + 5 ci 22 + 7.5 ci 22 + 7.5 ci 19 +10 ci 19 +10 ci
Walls Above Grade Max. U(3) 0.047 0.047 0.042 0.042 0.040 0.040
Min. Effective R(3) 21.40 21.40 23.90 23.90 25.32 25.32
Min. Nominal R(1) 20 ci 12 +10 ci 20 ci 12 +10 ci 20 ci 20 ci
Basement Walls(6) Max. U(4) 0.047 0.048 0.047 0.048 0.047 0.047
Min. Effective R(4) 21.12 20.84 21.12 20.84 21.12 21.12
Below Grade Slab Min. Nominal R(1) — — — — — 10
Entire Surface > 600 mm Max. U(4) — — — — — 0.090
Below Grade Min. Effective R(4) — — — — — 11.13
Heated Slab or Min. Nominal R(1) 10 10 10 10 10 10
Slab ≤ 600 mm Below Max. U(4) 0.090 0.090 0.090 0.090 0.090 0.090
Grade Min. Effective R(4) 11.13 11.13 11.13 11.13 11.13 11.13
Edge of Below Grade Slab
Min. Nominal R(1) 10 10 10 10 10 10
≤ 600 mm Below Grade
Windows and Sliding Max. U(5) 0.28 0.25 0.25 0.21 0.25 0.21
Glass Energy Rating 25 29 29 34 29 34
Skylights Max. U(5) 0.49 0.49 0.49 0.49 0.49 0.49
Space Heating Equipment Min. AFUE 90% 90% 87% 87% 84% 84%
HRV SRE 75% 70% 70% 75% 75% 81%
Domestic Water Heater (7) Min. EF 0.66 0.62 0.66 — 0.66 —
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.2.B (IP):
The following definitions apply: HH = 10 inch high heel
Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
Page 16 • SB-12
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.2.C (SI)
ZONE 1 - Compliance Packages for Electric Space Heating
Forming Part of Sentence 3.1.1.2.(3)
Compliance Package
Component Thermal Values(8)
C1 C2 C3 C4
Min. Nominal RSI(1) 10.56 + HH 10.56 + HH 8.80 8.80
Ceiling with Attic Space Max. U(2) 0.095 0.095 0.115 0.115
Min. Effective RSI(2) 10.55 10.55 8.67 8.67
Min. Nominal RSI(1) 5.46 5.46 5.46 5.46
Ceiling Without Attic Space Max. U(2) 0.205 0.205 0.205 0.205
Min. Effective RSI(2) 4.87 4.87 4.87 4.87
Min. Nominal RSI(1) 5.46 5.46 6.16 6.16
Exposed Floor Max. U(3) 0.190 0.190 0.177 0.177
Min. Effective RSI(3) 5.25 5.25 5.64 5.64
3.34 + 3.87 + 3.87 + 3.87 +
Min. Nominal RSI(1)
1.76 ci 1.76 ci 1.76 ci 1.32 ci
Walls Above Grade
Max. U(3) 0.224 0.215 0.215 0.238
Min. Effective RSI(3) 4.46 4.65 4.65 4.21
3.52 +
Min. Nominal RSI(1) 3.52 ci 3.52 ci 3.52 ci
1.40 ci
Basement Walls(6)
Max. U(4) 0.250 0.269 0.269 0.269
Min. Effective RSI(4) 4.00 3.72 3.72 3.72
Min. Nominal RSI(1) 1.32 — — —
Below Grade Slab
Max. U(4) 0.658 — — —
Entire Surface > 600 mm Below Grade
Min. Effective RSI(4) 1.52 — — —
Min. Nominal RSI(1) 1.76 1.76 1.76 1.76
Heated Slab or
Max. U(4) 0.510 0.510 0.510 0.510
Slab ≤ 600 mm Below Grade
Min. Effective RSI(4) 1.96 1.96 1.96 1.96
Edge of Below Grade Slab
Min. Nominal RSI(1) 1.76 1.76 1.76 1.76
≤ 600 mm Below Grade
Max. U(5) 1.4 1.2 1.2 1.6
Windows and Sliding Glass Doors
Energy Rating 29 34 34 25
Skylights Max. U(5) 2.8 2.8 2.8 2.8
ASHP:
Space Heating Equipment Min. — — —
7.1 HSPF
HRV Min. SRE 81% 75% 81% 55%
Domestic Water Heater(7) Min. EF — — — —
Column 1 2 3 4 5 6
Notes to Table 3.1.1.2.C (SI):
The following definitions apply: HH = 250 mm high heel
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where
RSI 2.11 + 0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.2.C (IP)
ZONE 1 - Compliance Packages for Electric Space Heating
Forming Part of Sentence 3.1.1.2.(3)
Compliance Package
Component Thermal Values(8)
C1 C2 C3 C4
Min. Nominal R(1) 60 + HH 60 + HH 50 50
Ceiling with Attic Space Max. U(2) 0.016 0.016 0.020 0.020
Min. Effective R(2) 59.90 59.90 49.23 49.23
Min. Nominal R(1) 31 31 31 31
Ceiling Without Attic Space Max. U(2) 0.036 0.036 0.036 0.036
Min. Effective R(2) 27.65 27.65 27.65 27.65
Min. Nominal R(1) 31 31 35 35
Exposed Floor Max. U(3) 0.034 0.034 0.031 0.031
Min. Effective R(3) 29.80 29.80 32.02 32.02
Min. Nominal R(1) 19 + 10 ci 22 + 10 ci 22 + 10 ci 22 + 7.5 ci
Walls Above Grade Max. U(3) 0.040 0.038 0.038 0.042
Min. Effective R(3) 25.32 26.40 26.40 23.90
Min. Nominal R(1) 20 + 8 ci 20 ci 20 ci 20 ci
Basement Walls(6) Max. U(4) 0.044 0.047 0.047 0.047
Min. Effective R(4) 22.71 21.12 21.12 21.12
Below Grade Slab Min. Nominal R(1) 7.5 — — —
Entire Surface > 600 mm Below Max. U(4) 0.116 — — —
Grade Min. Effective R(4) 8.63 — — —
Min. Nominal R(1) 10 10 10 10
Heated Slab or
Max. U(4) 0.090 0.090 0.090 0.090
Slab ≤ 600 mm Below Grade
Min. Effective R(4) 11.13 11.13 11.13 11.13
Edge of Below Grade Slab
Min. Nominal R(1) 10 10 10 10
≤ 600 mm Below Grade
Max. U(5) 0.25 0.21 0.21 0.28
Windows and Sliding Glass Doors
Energy Rating 29 34 34 25
Skylights Max. U(5) 0.49 0.49 0.49 0.49
ASHP:
Space Heating Equipment Min. — — —
7.1 HSPF
HRV Min. SRE 81% 75% 81% 55%
Domestic Water Heater(7) Min. EF — — — —
Column 1 2 3 4 5 6
Notes to Table 3.1.1.2.C (IP):
The following definitions applies: HH = 10 inch high heel
(1) The values listed are minimum Nominal R values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
Page 18 • SB-12
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.1.3.Energy Efficiency for Buildings Located in Zone 2
(1) Except as provided in Sentences (2) to (5) and (7), the minimum thermal performance of building envelope and
equipment shall conform to Table 3.1.1.3.A.
(2) Except for solid fuel-burning space heating equipment and except as permitted in Sentence (5), where the space
heating equipment efficiency is 84% or more but less than 92%, the minimum thermal performance of the building
envelope and equipment shall conform to Table 3.1.1.3.B.
(3) Where electric space heating is used, the minimum thermal performance of the building envelope and equipment
shall conform to Table 3.1.1.3.C.
(4) Except as permitted in Sentence (5), where the space heating equipment efficiency cannot meet the requirements of
the applicable compliance packages, energy efficiency compliance shall be achieved in accordance with Subsection 3.1.2.
of this Supplementary Standard.
(5) Where an ICF wall assembly is installed as an above and below grade wall assembly that has minimum RSI 1.76
(R10) insulation on the interior surface of the concrete and minimum RSI 1.76 (R10) insulation on the exterior surface,
the ICF wall is deemed to comply with the thermal values set out for walls in compliance packages A1 and A3 in Table
3.1.1.3.A. (See Appendix A.)
(6) An ICF wall assembly described in Sentence (5) is permitted to be used in lieu of basement walls that require
insulation value of RSI 3.52 ci (R20) or less. (See Appendix A.)
(7) Building designs that utilize combined space heating and domestic water heating systems are permitted to use
compliance package A4 or A5, provided that
(a) the water heating equipment has a minimum of 0.80 EF, 90% AFUE, or is a condensing type, or,
(b) the combination of equipment has a minimum of 0.85 TPF determined in accordance with
CAN/CSA-P.9, “Test Method for Determining the Performance of Combined Space and
Water Heating Systems (Combos)”.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.3.A (SI)
ZONE 2 - Compliance Packages for Space Heating Equipment with AFUE ≥ 92%
Forming Part of Sentence 3.1.1.3.(1)
Compliance Package
Component Thermal Values(8)
A1 A2 A3 A4 A5 A6
Min. Nominal RSI(1) 10.56 8.80 10.56 + HH 10.56 10.56 8.80
Ceiling with Attic Space Max. U(2) 0.096 0.115 0.095 0.096 0.096 0.115
Min. Effective RSI(2) 10.43 8.67 10.55 10.43 10.43 8.67
Min. Nominal RSI(1) 5.46 5.46 5.46 5.46 5.46 5.46
Ceiling Without Attic Space Max. U(2) 0.205 0.205 0.205 0.205 0.205 0.205
Min. Effective RSI(2) 4.87 4.87 4.87 4.87 4.87 4.87
Min. Nominal RSI(1) 5.46 6.16 5.46 5.46 5.46 6.16
Exposed Floor Max. U(3) 0.190 0.177 0.190 0.190 0.190 0.177
Min. Effective RSI(3) 5.25 5.64 5.25 5.25 5.25 5.64
3.34 + 3.34 + 3.87+ 3.87 + 3.34 + 3.87 +
Min. Nominal RSI(1)
0.88 ci 1.76 ci 0.88 ci 1.32 ci 1.76 ci 1.32 ci
Walls Above Grade
Max. U(3) 0.280 0.224 0.265 0.238 0.224 0.238
Min. Effective RSI(3) 3.58 4.46 3.77 4.21 4.46 4.21
Min. Nominal RSI(1) 3.52 ci 3.52 ci 3.52 ci 3.52 ci 3.52 ci 3.52 ci
Basement Walls(6) Max. U(4) 0.269 0.269 0.269 0.269 0.269 0.269
Min. Effective RSI(4) 3.72 3.72 3.72 3.72 3.72 3.72
Below Grade Slab Min. Nominal RSI(1) — — 0.88 — 1.76 1.32
Entire Surface > 600 mm Max. U(4) — — 0.926 — 0.51 0.658
Below Grade Min. Effective RSI(4) — — 1.08 — 1.96 1.52
Heated Slab or Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
Slab ≤ 600 mm Below Max. U(4) 0.510 0.510 0.510 0.510 0.510 0.510
Grade Min. Effective RSI(4) 1.96 1.96 1.96 1.96 1.96 1.96
Edge of Below Grade Slab
Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
≤ 600 mm Below Grade
Windows and Sliding Max. U(5) 1.2 1.6 1.6 1.2 1.4 1.4
Glass Doors Energy Rating 34 25 25 34 29 29
Skylights Max. U(5) 2.8 2.8 2.8 2.8 2.8 2.8
Space Heating Equipment Min. AFUE 96% 96% 98% 96% 94% 92%
HRV Min. SRE 81% 70% 65% 65% 65% 75%
Domestic Water Heater(7) Min. EF 0.70 0.80 0.80 0.67 0.67 0.70
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.3.A (SI):
The following definition applies: HH = 250 mm high heel
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m² • K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where RSI 2.11 +
0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
Page 20 • SB-12
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.3.A (IP)
ZONE 2 - Compliance Packages for Space Heating Equipment with AFUE ≥ 92%
Forming Part of Sentence 3.1.1.3.(1)
Compliance Package
Component Thermal Values(8)
A1 A2 A3 A4 A5 A6
Min. Nominal R(1) 60 50 60+HH 60 60 50
Ceiling with Attic Space Max. U(2) 0.017 0.020 0.016 0.017 0.017 0.020
Min. Effective R(2) 59.22 49.23 59.90 59.22 59.22 49.23
Min. Nominal R(1) 31 31 31 31 31 31
Ceiling Without Attic
Max. U(2) 0.036 0.036 0.036 0.036 0.036 0.036
Space
Min. Effective R(2) 27.65 27.65 27.65 27.65 27.65 27.65
Min. Nominal R(1) 31 35 31 31 31 35
Exposed Floor Max. U(3) 0.034 0.031 0.034 0.034 0.034 0.031
Min. Effective R(3) 29.80 32.02 29.80 29.80 29.80 32.02
Min. Nominal R(1) 19 + 5 ci 19 + 10 ci 22 + 5 ci 22 + 7.5 ci 19 + 10 ci 22 + 7.5 ci
Walls Above Grade Max. U(3) 0.049 0.040 0.047 0.042 0.040 0.042
Min. Effective R(3) 20.32 25.32 21.40 23.90 25.32 23.90
Min. Nominal R(1) 20 ci 20 ci 20 ci 20 ci 20 ci 20 ci
Basement Walls(6) Max. U(4) 0.047 0.047 0.047 0.047 0.047 0.047
Min. Effective R(4) 21.12 21.12 21.12 21.12 21.12 21.12
Below Grade Slab Min. Nominal R(1) — — 5 — 10 7.5
Entire Surface > 600 mm Max. U(4) — — 0.163 — 0.090 0.116
Below Grade Min. Effective R(4) — — 6.13 — 11.13 8.63
Heated Slab or Min. Nominal R(1) 10 10 10 10 10 10
Slab ≤ 600 mm Below Max. U(4) 0.090 0.090 0.090 0.090 0.090 0.090
Grade Min. Effective R(4) 11.13 11.13 11.13 11.13 11.13 11.13
Edge of Below Grade Slab
Min. Nominal R(1) 10 10 10 10 10 10
≤ 600 mm Below Grade
Windows and Sliding Max. U(5) 0.21 0.28 0.28 0.21 0.25 0.25
Glass Doors Energy Rating 34 25 25 34 29 29
Skylights Max. U(5) 0.49 0.49 0.49 0.49 0.49 0.49
Space Heating Equipment Min. AFUE 96% 96% 98% 96% 94% 92%
HRV Min. SRE 81% 70% 65% 65% 65% 75%
Domestic Water Heater (7) Min. EF 0.70 0.80 0.80 0.67 0.67 0.70
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.3.A (IP):
The following definition applies: HH = 10 inch high heel
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.3.B (SI)
ZONE 2 - Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92%
Forming Part of Sentence 3.1.1.3.(2)
Compliance Package
Component Thermal Values(8)
B1 B2 B3 B4 B5 B6
Min. Nominal RSI(1) 8.80 10.56 10.56 + HH 10.56 + HH 8.80 10.56
Ceiling with Attic Space Max. U(2) 0.115 0.096 0.095 0.095 0.115 0.096
Min. Effective RSI(2) 8.67 10.43 10.55 10.55 8.67 10.43
Min. Nominal RSI(1) 5.46 5.46 5.46 5.46 5.46 5.46
Ceiling Without Attic Space Max. U(2) 0.205 0.205 0.205 0.205 0.205 0.205
Min. Effective RSI(2) 4.87 4.87 4.87 4.87 4.87 4.87
5.46 +
Min. Nominal RSI(1) 6.16 5.46 5.46 6.16 5.46
1.76 ci
Exposed Floor
Max. U(3) 0.177 0.190 0.143 0.190 0.177 0.190
Min. Effective RSI(3) 5.64 5.25 7.01 5.25 5.64 5.25
3.87 + 3.87 + 3.87 + 3.87 + 3.87 + 3.87 +
Min. Nominal RSI(1)
1.32 ci 1.32 ci 1.76 ci 1.76 ci 1.76 ci 1.76 ci
Walls Above Grade
Max. U(3) 0.238 0.238 0.215 0.215 0.215 0.215
Min. Effective RSI(3) 4.21 4.21 4.65 4.65 4.65 4.65
2.11 + 3.52 + 3.52 + 3.52 + 3.52 +
Min. Nominal RSI(1) 3.52 ci
1.76 ci 1.76 ci 1.76 ci 2.11 ci 2.11 ci
Basement Walls(6)
Max. U(4) 0.269 0.272 0.226 0.226 0.213 0.213
Min. Effective RSI(4) 3.72 3.67 4.43 4.43 4.7 4.7
Below Grade Slab Min. Nominal RSI(1) — 0.88 1.76 1.76 0.88 0.88
Entire Surface > 600 mm Max. U(4) — 0.926 0.510 0.510 0.926 0.926
Below Grade Min. Effective RSI(4) — 1.08 1.96 1.96 1.08 1.08
Heated Slab or Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
Slab ≤ 600 mm Below Max. U(4) 0.510 0.510 0.510 0.510 0.510 0.510
Grade Min. Effective RSI(4) 1.96 1.96 1.96 1.96 1.96 1.96
Edge of Below Grade Slab
Min. Nominal RSI(1) 1.76 1.76 1.76 1.76 1.76 1.76
≤ 600 mm Below Grade
Windows and Sliding Max. U(5) 1.2 1.6 1.4 1.4 1.4 1.2
Glass Doors Energy Rating 34 25 29 29 29 34
Skylights Max. U(5) 2.8 2.8 2.8 2.8 2.8 2.8
Space Heating Equipment Min. AFUE 90% 90% 87% 87% 84% 84%
HRV Min. SRE 75% 81% 70% 75% 81% 81%
Domestic Water Heater(7) Min. EF 0.66 0.66 0.66 0.62 0.66 —
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.3.B (SI):
The following definition applies: HH = 250 mm high heel
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where RSI 2.11 +
0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
Page 22 • SB-12
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.3.B (IP)
ZONE 2 - Compliance Packages for Space Heating Equipment with 84% ≤ AFUE < 92%
Forming Part of Sentence 3.1.1.3.(2)
Compliance Package
Component Thermal Values(8)
B1 B2 B3 B4 B5 B6
Min. Nominal R(1) 50 60 60 + HH 60 + HH 50 60
Ceiling with Attic Space Max. U(2) 0.020 0.017 0.016 0.016 0.020 0.017
Min. Effective R(2) 49.23 59.22 59.90 59.90 49.23 59.22
Min. Nominal R(1) 31 31 31 31 31 31
Ceiling Without Attic Space Max. U(2) 0.036 0.036 0.036 0.036 0.036 0.036
Min. Effective R(2) 27.65 27.65 27.65 27.65 27.65 27.65
Min. Nominal R(1) 35 31 31 + 10 ci 31 35 31
Exposed Floor Max. U(3) 0.031 0.034 0.025 0.034 0.031 0.034
Min. Effective R(3) 32.02 29.80 39.80 29.80 32.02 29.80
Min. Nominal R(1) 22 + 7.5 ci 22 + 7.5 ci 22 + 10 ci 22 + 10 ci 22 + 10 ci 22 + 10 ci
Walls Above Grade Max. U(3) 0.042 0.042 0.038 0.038 0.038 0.038
Min. Effective R(3) 23.90 23.90 26.40 26.40 26.40 26.40
Min. Nominal R(1) 20 ci 12 + 10 ci 20 + 10 ci 20 + 10 ci 20 + 12 ci 20 + 12 ci
Basement Walls(6) Max. U(4) 0.047 0.048 0.040 0.040 0.037 0.037
Min. Effective R(4) 21.12 20.84 25.15 25.15 26.69 26.69
Below Grade Slab Min. Nominal R(1) — 5 10 10 5 5
Entire Surface > 600 mm Max. U(4) — 0.163 0.090 0.090 0.163 0.163
Below Grade Min. Effective R(4) — 6.13 11.13 11.13 6.13 6.13
Heated Slab or Min. Nominal R(1) 10 10 10 10 10 10
Slab ≤ 600 mm Below Max. U(4) 0.090 0.090 0.090 0.090 0.090 0.090
Grade Min. Effective R(4) 11.13 11.13 11.13 11.13 11.13 11.13
Edge of Below Grade Slab
Min. Nominal R(1) 10 10 10 10 10 10
≤ 600 mm Below Grade
Windows and Sliding Glass Max. U(5) 0.21 0.28 0.25 0.25 0.25 0.21
Doors Energy Rating 34 25 29 29 29 34
Skylights Max. U(5) 0.49 0.49 0.49 0.49 0.49 0.49
Space Heating Equipment Min. AFUE 90% 90% 87% 87% 84% 84%
HRV Min. SRE 75% 81% 70% 75% 81% 81%
Domestic Water Heater (7) Min. EF 0.66 0.66 0.66 0.62 0.66 —
Column 1 2 3 4 5 6 7 8
Notes to Table 3.1.1.3.B (IP):
The following definition applies: HH = 10 inch high heel
(1) The values listed are minimum Nominal R values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.3.C (SI)
ZONE 2 - Compliance Packages for Electric Space Heating
Forming Part of Sentence 3.1.1.3.(3)
Compliance Package
Component Thermal Values(8)
C1 C2
Min. Nominal RSI(1) 10.56 + HH 8.80
Ceiling with Attic Space Max. U(2) 0.095 0.115
Min. Effective RSI(2) 10.55 8.67
Min. Nominal RSI(1) 5.46 5.46
Ceiling Without Attic Space Max. U(2) 0.205 0.205
Min. Effective RSI(2) 4.87 4.87
Min. Nominal RSI(1) 5.46 + 1.76 ci 6.16
Exposed Floor Max. U(3) 0.143 0.177
Min. Effective RSI(3) 7.01 5.64
Min. Nominal RSI(1) 4.22 + 1.76 ci 3.87 + 1.32 ci
Walls Above Grade Max. U(3) 0.210 0.238
Min. Effective RSI(3) 4.76 4.21
Min. Nominal RSI(1) 3.52 + 2.11 ci 3.52 ci
Basement Walls(6) Max. U(4) 0.213 0.269
Min. Effective RSI(4) 4.7 3.72
Min. Nominal RSI(1) 1.76 —
Below Grade Slab
Max. U(4) 0.51 —
Entire Surface > 600 mm Below Grade
Min. Effective RSI(4) 1.96 —
Min. Nominal RSI(1) 1.76 1.76
Heated Slab or
Max. U(4) 0.510 0.510
Slab ≤ 600 mm Below Grade
Min. Effective RSI(4) 1.96 1.96
Edge of Below Grade Slab ≤ 600 mm Below Grade Min. Nominal RSI(1) 1.76 1.76
Max. U(5) 1.2 1.6
Windows and Sliding Glass Doors
Energy Rating 34 25
Skylights Max. U(5) 2.8 2.8
ASHP:
Space Heating Equipment Min. —
7.1 HSPF
HRV Min. SRE 81% 70%
Domestic Water Heater(7) Min. EF — —
Column 1 2 3 4
Notes to Table 3.1.1.2.C (SI):
The following definition applies: HH = 250 mm high heel
(1) The values listed are minimum Nominal RSI-values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where
RSI 2.11 + 0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
Page 24 • SB-12
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2024MMA Supplementary Standard SB-12
Table 3.1.1.3.C (IP)
ZONE 2 - Compliance Packages for Electric Space Heating
Forming Part of Sentence 3.1.1.3.(3)
Compliance Package
Component Thermal Values(8)
C1 C2
Min. Nominal R(1) 60 + HH 50
Ceiling with Attic Space Max. U(2) 0.016 0.020
Min. Effective R(2) 59.90 49.23
Min. Nominal R(1) 31 31
Ceiling Without Attic Space Max. U(2) 0.036 0.036
Min. Effective R(2) 27.65 27.65
Min. Nominal R(1) 31 + 10 ci 35
Exposed Floor Max. U(3) 0.025 0.031
Min. Effective R(3) 39.80 32.02
Min. Nominal R(1) 24 + 10 ci 22 + 7.5 ci
Walls Above Grade Max. U(3) 0.037 0.042
Min. Effective R(3) 27.02 23.90
Min. Nominal R(1) 20 + 12 ci 20 ci
Basement Walls(6) Max. U(4) 0.037 0.047
Min. Effective R(4) 26.69 21.12
Min. Nominal R(1) 10.0 —
Below Grade Slab
Max. U(4) 0.090 —
Entire Surface > 600 mm Below Grade
Min. Effective R(4) 11.13 —
Min. Nominal R(1) 10 10
Heated Slab or
Max. U(4) 0.090 0.090
Slab ≤ 600 mm Below Grade
Min. Effective R(4) 11.13 11.13
Edge of Below Grade Slab ≤ 600 mm Below Grade Min. Nominal R(1) 10 10
Max. U(5) 0.21 0.28
Windows and Sliding Glass Doors
Energy Rating 34 25
Skylights Max. U(5) 0.49 0.49
ASHP:
Space Heating Equipment Min. —
7.1 HSPF
HRV Min. SRE 81% 70%
Domestic Water Heater(7) Min. EF — —
Column 1 2 3 4
Notes to Table 3.1.1.3.C (IP):
The following definition applies: HH = 10 inch high heel
(1) The values listed are minimum Nominal R values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa
(7) If an EF of a water tank is not indicated in a compliance package, there is no EF requirement for water tank for that specific compliance package.
(8) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.1.4.Airtightness (See Appendix A)
(1) Where a dwelling unit is designed and constructed to be sufficiently airtight such that the air leakage of the whole
dwelling unit is less than or equal to one of the applicable airtightness targets specified in the same row of Table 3.1.1.4.A,
the requirements of Tables 3.1.1.2.A to 3.1.1.2.C, Tables 3.1.1.3.A to 3.1.1.3.C, and Table 3.1.1.11. are permitted to be
substituted in accordance with Table 3.1.1.4.B or Table 3.1.1.4.C.
(2) Airtightness targets described in Sentence (1) shall be measured under as operated conditions in accordance with
CAN/CGSB 149.10 “Determination of the Airtightness of Building Envelopes by the Fan Depressurization Method” or
NRCan, “EnerGuide Rating System Technical Procedures Version 15.1”.
(3) For purposes of substitutions described in Sentence (1),
(a) a maximum of one substitution per dwelling unit may be made if substitutions are made in accordance with Table
3.1.1.4.B, or
(b) a maximum of two substitutions per dwelling unit may be made if substitutions are made in accordance with Table
3.1.1.4.C.
Table 3.1.1.4.A
Airtightness Targets
Forming Part of Sentence 3.1.1.4.(1) and Subsection 3.1.2.
Airtightness Targets
Building Type NLA @ 10 Pa NLR @ 50 Pa
ACH @ 50Pa
cm2/m2 in2/100 ft2 L/s/m2 cfm/ft2
Detached 2.5 1.26 1.81 0.93 0.18
Attached 3.0 2.12 3.06 1.32 0.26
Column 1 2 3 4 5 6
Table 3.1.1.4.B (SI)
Permitted Substitutions for Airtight Dwelling Units (2)
Forming Part of Sentences 3.1.1.4.(1) and (3)
Permitted Substitution
Required Compliance
Airtightness Complies with Table 3.1.1.4.A(1)
Maximum One Substitution per Dwelling Unit
RSI 3.87 + 1.32 ci RSI 3.34 + 0.88 ci
RSI 3.87 + 1.76 ci RSI 3.34 + 1.32 ci
RSI 4.22 + 1.76 ci RSI 3.87 + 1.32 ci
HRV with 81% SRE HRV with 70% SRE
HRV with 75% SRE HRV with 65% SRE
Furnace with 98%, 96% or 94% AFUE Reduce furnace efficiency by 4% AFUE
Fenestration U-Value = 1.6, 1.4 or 1.2 Increase U-Value by 0.2
Column 1 2
Notes to Table 3.1.1.4.B (SI):
(1) Where nominal RSI values are given, the use of corresponding U-Value or effective RSI values are permitted.
(2) Use only Table 3.1.1.4.B or Table 3.1.1.4.C, not both.
Page 26 • SB-12
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2024MMA Supplementary Standard SB-12
Table 3.1.1.4.B (IP)
Permitted Substitutions for Airtight Dwelling Units(2)
Forming Part of Sentence 3.1.1.4.(1)
Permitted Substitution
Required Compliance
Airtightness Complies with Table 3.1.1.4.A(1)
Maximum One Substitution per Dwelling Unit
R22 + 7.5 ci R19 + 5 ci
R22 + 10 ci R19 + 7.5 ci
R24 + 10 ci R22 + 7.5 ci
HRV with 81% SRE HRV with 70% SRE
HRV with 75% SRE HRV with 65% SRE
Furnace with 98%, 96% or 94% AFUE Reduce furnace efficiency by 4% AFUE
Fenestration U-Value = 0.28, 0.25 or 0.21 Increase U-Value by 0.04 (downgrade one level)
Column 1 2
Notes to Table 3.1.1.4.B (IP):
(1) Where nominal R values are given, the use of corresponding “U” or “effective R” values are permitted.
(2) Use only Table 3.1.1.4.B or Table 3.1.1.4.C, not both.
Table 3.1.1.4.C (SI)
Permitted Substitutions for Airtight Dwelling Units(3)
Forming Part of Sentences 3.1.1.4.(1) and (3)
Permitted Substitutions
Required Compliance
Airtightness Complies with Table 3.1.1.4.A(1)
Maximum Two Substitutions per Dwelling Unit(2)
Above grade continuous wall insulation RSI 0.88 ci or RSI 1.32 ci
Above grade continuous wall insulation RSI 1.32 ci or RSI 1.76 ci
respectively
RSI 3.87 or RSI 4.22 insulation between studs in above grade walls RSI 3.34 or RSI 3.87 insulation respectively between studs in
with continuous insulation above grade walls with continuous insulation
Basement wall RSI 3.52 + 2.11 ci, RSI 3.52 +1.76 ci or RSI 3.52 ci Basement wall RSI 2.64 ci or RSI 2.11 + 0.88 ci
Slab located more than 600 mm below grade and entire under slab RSI 0, if slab is unheated
insultation is RSI 1.76 or RSI 0.88 RSI 0.88, if slab is heated
RSI 10.56 ceiling insulation with or without 250 mm high heel RSI 8.80 ceiling insulation
Column 1 2
Notes to Table 3.1.1.4.C (SI):
(1) Where nominal RSI values are given, the use of corresponding U-Value or effective RSI values are permitted.
(2) Where the required airtightness is achieved, simultaneous substitution of two components listed in this Table is permitted.
(3) Use only Table 3.1.1.4.B or Table 3.1.1.4.C, not both.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.4.C (IP)
Permitted Substitutions for Airtight Dwelling Units (3)
Forming Part of Sentences 3.1.1.4.(1) and (3)
Permitted Substitutions
Required Compliance
Airtightness Complies with Table 3.1.1.4.A(1)
Maximum Two Substitutions per Dwelling Unit(2)
Above grade continuous wall insulation R5 ci or R7.5 ci
Above grade continuous wall insulation R7.5 ci or R10 ci
respectively
R22 or R24 insulation between studs in above grade walls with R19 or R22 insulation respectively between studs in above grade
continuous insulation walls with continuous insulation
Basement wall R20 + 12 ci, R20 +10 ci or R20 ci Basement wall R15 ci or R12 + 5 ci
Slab located more than 24 inches below grade and entire under R0 , if the slab is unheated
slab insultation is R10 or R5 R5 min, if heated
R60 ceiling insulation with or without 10 inch high heel R50 ceiling insulation
Column 1 2
Notes to Table 3.1.1.4.C (IP):
(1) Where nominal R values are given, the use of corresponding “U” or “effective R” values are permitted.
(2) Where the required airtightness is achieved, simultaneous substitution of two components listed in this Table is permitted.
(3) Use only Table 3.1.1.4.B or Table 3.1.1.4.C, not both.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.1.5.Elements Acting as a Thermal Bridge
(1) Except for a foundation wall, the insulated portion of a wall that incorporates wood stud framing elements that have
a thermal resistance of less than RSI 0.90 shall be insulated to restrict heat flow through the studs by a material providing
a thermal resistance at least equal to 25% of the thermal resistance required for the insulated portion of the assembly in
Articles 3.1.1.2., 3.1.1.3. and 3.1.1.11.
(2) Except as provided in Sentence (3), the thermal resistance of the insulated portion of a building assembly in
Articles 3.1.1.2. and 3.1.1.3. that incorporates metal framing elements, such as steel studs and steel joists, that act as
thermal bridges to facilitate heat flow through the assembly, shall be 20% greater than the values shown in
Tables 3.1.1.2.A, to 3.1.1.2. C and Tables 3.1.1.3.A to 3.1.1.3.C and Table 3.1.1.11., unless it can be shown that the heat
flow is not greater than the heat flow through a wood frame assembly of the same thickness.
(3) Sentence (2) does not apply to building assemblies incorporating thermal bridges where the thermal bridges are
insulated to restrict heat flow through the thermal bridges by a material providing a thermal resistance at least equal to
25% of the thermal resistance required for the insulated portion of the assembly in Articles 3.1.1.2., 3.1.1.3. and 3.1.1.11.
3.1.1.6. Log Wall Construction and Post, Beam and Plank Construction
(1) Except as provided in Sentences (2) and (3), log wall construction and post, beam and plank construction shall have
a minimum thermal resistance of RSI 2.1 for the total assembly.
(2) The thermal resistance value in Sentence (1) for the total wall assembly may be reduced to not less than RSI 1.61 if,
(a) the thermal resistance of insulation for the exposed roof or ceiling required in selected compliance package is
increased by an amount equivalent to the reduction permitted in this Sentence, and
(b) for log walls, the logs have tongue-and-groove or splined joints.
Page 28 • SB-12
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2024MMA Supplementary Standard SB-12
(3) Where milled log walls are installed, the thermal resistance value in Sentence (1) for the total wall assembly does
not apply if,
(a) the mean thickness of each log is not less than 150 mm,
(b) the thermal resistance of insulation for the exposed roof or ceiling required in selected compliance package is
increased by RSI 0.53, and
(c) the logs have tongue-and-groove or splined joints.
(4) Where a log wall is constructed in accordance with Sentences (1) to (3), the log wall shall be deemed to comply with
the requirements in Subsection 9.25.3. of Division B of the Building Code.
3.1.1.7.Insulation of Foundation Walls
(1) Foundation walls enclosing heated space shall be insulated from the underside of the subfloor to not more than
200 mm above the finished floor level of the basement. (See Appendix A.)
(2) The insulation required by Sentence (1) may be provided by a system installed,
(a) on the interior of the foundation wall,
(b) on the exterior face of the foundation wall, or
(c) partially on the interior and partially on the exterior, provided the thermal performance of the system is equivalent to
that permitted in Clauses (a) or (b).
(3) If a foundation wall is constructed of hollow masonry units, one or more of the following shall be used to control
convection currents in the core spaces,
(a) filling the core spaces,
(b) at least one row of semi-solid blocks at or below grade, or
(c) other similar methods.
(4) Masonry walls of hollow units that penetrate the ceiling shall be sealed at or near the ceiling adjacent to the roof
space to prevent air within the voids from entering the attic or roof space by,
(a) capping with masonry units without voids, or
(b) installation of flashing material extending across the full width of the masonry.
(5) Except as provided in Sentences (6) and (7), where a portion of a basement slab or a portion of a basement slab edge
is the only part of the slab that is at the exterior ground level such as a walk-out basement, or within 600 mm of the
exterior ground level, those portions shall have perimeter insulation extend not less than 600 mm below the slab level.
(See Appendix A.)
(6) Where the entire concrete slab is within 600 mm of the exterior ground level, the entire surface of the slab shall be
insulated. (See Appendix A.)
(7) Where a slab contains heating ducts, pipes, tubes or cables, the entire heated surface of the slab that is in contact
with the ground shall be insulated.
3.1.1.8.Thermal Resistance Values for Roof Access Hatches and Eaves
(1) Except as provided in Sentence (2), the thermal resistance values for insulation required by Articles 3.1.1.2.,
3.1.1.3. and 3.1.1.11. for exposed ceilings with attic spaces are permitted to be reduced
(a) directly above access hatches, and
(b) near eaves to the extent made necessary by the roof slope and required ventilation clearances,
except that the thermal insulation value at the location directly above access hatches and inner surfaces of exterior walls
shall be not less than RSI 3.52.
(2) Where 250 mm high heel is required near the eaves, the available space on the inner surface of the wall below the
roof venting space shall be fully insulated.
2024MMA Supplementary Standard SB-12
3.1.1.9. Thermal Performance of Windows, Skylights and Sliding Glass Doors
(1) Except as provided in Sentences (3) to (5), windows, skylights and sliding glass doors shall meet
(a) the required overall coefficient of heat transfer in Tables 3.1.1.2.A 3.1.1.2.B and 3.1.1.2.C and Tables 3.1.1.3.A,
3.1.1.3.B and 3.1.1.3. C and Table 3.1.1.11., or
(b) the corresponding energy rating in Table 3.1.1.9.
(2) The energy rating and the overall coefficient of heat transfer required for windows and sliding glass doors in a
residential occupancy shall be determined in conformance with
(a) CAN/CSA-A440.2, “Fenestration Energy Performance”, or
(b) NFRC 100, “Procedure for Determining Fenestration Product U-factors” and NFRC 200, “Procedure for
Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence”.
(3) A basement window that incorporates a loadbearing structural frame need not meet Sentence (1) provided that it has
the following
(a) double glazed with a low-E coating,
(b) inert gas-filled,
(c) have an insulated spacer, and
(d) if the frame is made from metal, the frame shall be thermally broken.
(4) Glass blocks and decorative windows, including side lights, integrated glazing in doors, half-circle windows, leaded
windows, transoms and other specialty glazing products, need not comply with Sentence (1) provided that the total area of
such decorative glazing in the building does not exceed 1.85 m2.
(5) Windows and sliding glass doors need not meet the overall coefficient of heat transfer required by Sentence (1)
where the window or sliding glass door necessitates a low solar heat gain coefficient due to its orientation and results in a
U-Value greater than that permitted by Sentence (1), provided the overall thermal performance of all windows and sliding
glass doors is maintained by improving the performance of other windows or sliding glass doors.
Table 3.1.1.9.
Maximum U-Values and Minimum Energy Ratings (ER) for Windows, Skylights and Sliding Glass Doors
Forming Part of Sentence 3.1.1.9.(1)
Maximum U-Values Minimum Energy Ratings, (ER)
Component
U-Value, W/m2•K (Btu/h•ft2•°F) ER
Skylights 2.8 (0.50) —
2.0 (0.35) 17
1.8 (0.32) 21
1.6 (0.28) 25
Windows and
Sliding Glass Doors
1.4 (0.25) 29
1.2 (0.21) 34
1.0 (0.18) 38
Column 1 2 3
Page 30 • SB-12
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.1.10.Minimum Thermal Resistance of Doors
(1) Except as provided in Sentence (2) and except for doors in enclosed unheated vestibules and cold cellars, and except
for glazed portions of doors, all doors that separate heated space from unheated space shall have a thermal resistance of
not less than RSI 0.7 where a storm door is not provided.
(2) One exterior door system, with a single or multiple leaf door, that does not comply with Sentence (1) is permitted
for each dwelling unit.
(3) All doors that separate heated space from unheated enclosed spaces shall have an insulated core and be installed
with weatherstripping.
3.1.1.11.Additions to Existing Buildings
(1) Except as provided in Sentences (2) and (3), an addition to an existing building shall comply with
(a) one of the applicable compliance packages in Article 3.1.1.2. or 3.1.1.3. in accordance with this Subsection, or
(b) Sentences 3.1.1.1.(7) to (9), except that the Tables referenced in Sentences 3.1.1.1.(7) and (8) are permitted to be
substituted with Table 3.1.1.11.
(See Appendix A.)
(2) For the purpose of Sentences 3.1.1.1.(7) to (9) and Subsection 3.1.2., the addition may be considered independently
or in combination with the existing building, regardless of the thermal characteristics of the existing building envelope.
(See Appendix A.)
(3) A one-storey sunroom addition to an existing building shall be deemed to be in compliance with Articles 3.1.1.2.
and 3.1.1.3. and Subsection 3.1.2., provided that the overall coefficient of heat transfer of
(a) doors, windows and walls has a maximum U-Value of
(i) 1.4 if the building does not use electric space heating, and
(ii) 1.2 if the building uses electric space heating, and
(b) roofs and skylights has a maximum U-Value of 2.6.
(See Appendix A.)
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.1.11. (SI)
Thermal Performance Requirements for Additions to Existing Buildings (3)
Forming Part of Sentence 3.1.1.11.(2)
Compliance Package
Component Thermal Values(7) Zone 1 Zone 2 Electric Space Heating
Less than 5000 5000 or more
Zones 1 and 2
Degree Days Degree Days
Min. Nominal RSI(1) 10.56 10.56 10.56
Ceiling with Attic Space Max. U(2) 0.096 0.096 0.096
Min. Effective RSI(2) 10.43 10.43 10.43
Min. Nominal RSI(1) 5.46 5.46 5.46
Ceiling Without Attic
Max. U(2) 0.205 0.205 0.205
Space
Min. Effective RSI(2) 4.87 4.87 4.87
Min. Nominal RSI(1) 5.46 5.46 5.46
Exposed Floor Max. U(3) 0.190 0.190 0.190
Min. Effective RSI(3) 5.25 5.25 5.25
Min. Nominal RSI(1) 3.34 + 0.88 ci 3.87 + 1.32 ci 3.87 + 1.76 ci
Walls Above Grade Max. U(3) 0.280 0.238 0.215
Min. Effective RSI(3) 3.58 4.21 4.65
Min. Nominal RSI(1) 3.52 ci 3.52 ci 3.52 ci
Basement Walls(6) Max. U(4) 0.269 0.269 0.269
Min. Effective RSI(4) 3.72 3.72 3.72
Min. Nominal RSI(1) 1.76 1.76 1.76
Heated Slab or
Slab ≤ 600 mm Below Max. U(4) 0.510 0.510 0.510
Grade
Min. Effective RSI(4) 1.96 1.96 1.96
Edge of Below Grade
Slab ≤ 600 mm Below Min. Nominal RSI(1) 1.76 1.76 1.76
Grade
Windows and Sliding Max. U(5) 1.6 1.4 1.4
Glass Doors Energy Rating 25 29 29
Column 1 2 3 4 5
Notes to Table 3.1.1.11. (SI):
(1) The values listed are minimum Nominal RSI-Values for the thermal insulation component only.
(2) U-Value and effective RSI value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective RSI value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective RSI value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in W/(m²•K).
(6) In the case of basement wall assemblies, where RSI 3.52 ci is required RSI 2.11 + 1.76 ci is permitted to be used or vice versa; or where
RSI 2.11 + 0.88 ci is required, RSI 2.64 ci is permitted to be used or vice versa.
(7) Nominal and effective RSI values are expressed in (m²•K)/W. U-Values are expressed in W/(m²•K).
Page 32 • SB-12
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2024MMA Supplementary Standard SB-12
Table 3.1.1.11. (IP)
Thermal Performance Requirements for Additions to Existing Buildings (3)
Forming Part of Sentence 3.1.1.11.(2)
Compliance Package
Component Thermal Values(7) Zone 1 Zone 2 Electric Space Heating
Less than 5000 5000 or more
Zones 1 and 2
Degree Days Degree Days
Min. Nominal R(1) 60 60 60
Ceiling with Attic Space Max. U(2) 0.017 0.017 0.017
Min. Effective R(2) 59.22 59.22 59.22
Min. Nominal R(1) 31 31 31
Ceiling Without Attic
Max. U(2) 0.036 0.036 0.036
Space
Min. Effective R(2) 27.65 27.65 27.65
Min. Nominal R(1) 31 31 31
Exposed Floor Max. U(3) 0.034 0.034 0.034
Min. Effective R(3) 29.80 29.80 29.80
Min. Nominal R(1) 19 + 5 ci 22 + 7.5 ci 22 + 10 ci
Walls Above Grade Max. U(3) 0.049 0.042 0.038
Min. Effective R(3) 20.32 23.90 26.40
Min. Nominal R(1) 20 ci 20 ci 20 ci
Basement Walls(6) Max. U(4) 0.047 0.047 0.047
Min. Effective R(4) 21.12 21.12 21.12
Min. Nominal R(1) 10 10 10
Heated Slab or
Slab ≤ 600 mm Below Max. U(4) 0.090 0.090 0.090
Grade
Min. Effective R(4) 11.13 11.13 11.13
Edge of Below Grade
Slab ≤ 600 mm Below Min. Nominal R(1) 10 10 10
Grade
Windows and Sliding Max. U(5) 0.28 0.25 0.25
Glass Doors Energy Rating 25 29 29
Column 1 2 3 4 5
Notes to Table 3.1.1.11. (IP):
(1) The values listed are minimum Nominal R values for the thermal insulation component only.
(2) U-Value and effective R value shall include entire ceiling assembly components, from interior air film to vented space air film above insulation.
(3) U-Value and effective R value shall include entire exposed floor or above grade wall assembly components, from interior air film to exterior air film.
(4) U-Value and effective R value shall include entire basement wall or slab assembly components and interior air film.
(5) U-Value is the overall coefficient of heat transfer for a window assembly, sliding glass door assembly or skylight assembly expressed in Btu/(h•ft²•F).
(6) In the case of basement wall assemblies, where R20 ci is required R12 + 10 ci is permitted to be used or vice versa; or where R12 + 5 ci is required,
R15 ci is permitted to be used or vice versa.
(7) Nominal and effective R values are expressed in (h•ft²•F)/Btu. U-Values are expressed in Btu/(h•ft²•F).
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.1.12.Drain Water Heat Recovery
(1) Except as provided in Sentence (2), a drain water heat recovery unit shall be installed in each dwelling unit to
receive drain water from all showers or from at least two showers where there are two or more showers in the dwelling
unit. (See Appendix A.)
(2) Sentence (1) does not to apply to dwelling units in which:
(a) there are no showers; or
(b) there are no storeys or crawl spaces beneath any of the showers in the dwelling unit.
(3) Drain water heat recovery units shall conform to CSA B55.2, “Drain Water Heat Recovery Units”.
(4) The minimum efficiency of a drain water heat recovery unit shall be determined in conformance with CSA B55.1,
“Test Method for Measuring Efficiency and Pressure Loss of Drain Water Heat Recovery Units”.
(5) The efficiency of a drain water heat recovery unit, when tested in accordance with Sentence (4), shall be not less
than 42%.
(6) A drain water heat recovery unit shall be installed
(a) in an upright position that does not diverge more than 5 degrees from the vertical,
(b) in a position such that the cold water inlet connection is at the bottom of the unit,
(c) downstream of a water softener where a water softener is installed, and
(d) in a conditioned space or on the warm side of the dewpoint of the wall assembly.
3.1.2.1.Required Performance Level (See Appendix A.)
(1) The performance level shall be measured based on the simulated annual energy use of the building.
(2) For the purpose of this Subsection, reference building means a building that is identical to the proposed building,
except that it is designed to meet the requirements and performance level of an applicable compliance package in
Subsection 3.1.1. on the basis of
(a) zone location,
(b) energy source, and
(c) equipment efficiency.
(3) The simulated annual energy use of the proposed building shall not be greater than the simulated annual energy use
of the reference building.
(4) The simulated annual energy use of the proposed building and the reference building shall be calculated in
accordance with Table 3.1.2.1.
(5) For the purpose of calculations required in Sentence (4),
(a) the simulation software used shall be a recognized annual energy use simulation software,
(b) the climatic data used shall be the local climatic data,
(c) the equivalent domestic water loads, appliance loads and other plug-in loads shall be assumed for both the proposed
building and the reference building, and
(d) the same software and climatic conditions shall be used for both the proposed building and the reference buildings.
(6) Where the overall thermal performance of the proposed building envelope is less than the envelope performance of
the compliance package that is compared against it, the reduction in the performance level of the building envelope shall
not be more than 25%.
(7) The annual energy use simulation of the reference building shall be in accordance with Subsection 3.1.1. of this
Supplementary Standard, Part 12 and other applicable parts of the Building Code.
Page 34 • SB-12
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2024MMA Supplementary Standard SB-12
Table 3.1.2.1.
Specification for the Reference and Proposed Building Design
Forming Part of Sentence 3.1.2.1.(4)
Building Component Reference Building Design Proposed Building Design
Dimensions and orientation: same as proposed design.
Fenestration to wall ratio: same as proposed up to 22%, (where
17% < ratio ≤ 22%, U-Value is required to be upgraded as per
As proposed (See Sentences
3.1.1.1.(8)) where the proposed fenestration to wall ratio
3.1.2.1.(5) to (8)).
Building Envelope exceeds 22%, the fenestration area of the reference building
shall be reduced proportionally along each exposure until the
22% is met.
RSI Values or U-Values and ER values: as per applicable
compliance package required in Subsection 3.1.1.
Above Grade:
Wood Frame spacing:
406 mm o.c. for wall studs,
406 mm o.c. for exposed floors joists, roof joists, and roof rafters,
Construction Type As proposed.
and
610 mm o.c. for roof trusses.
Below Grade: Concrete with interior insulation.
Detached dwelling:
3.0 ACH, NLA 2.12 cm2/m2, or NLR 1.32 L/s/m2
Same as reference, or tested air
leakage rate, that is measured in
Air Leakage Rate Attached dwellings:
accordance with Sentence
3.5 ACH, NLA 2.27 cm2/m2, or NLR 1.44 L/s/m2
3.1.1.4.(2).
(See Appendix A).
On-site Renewable Energy None.(1) As proposed.
HRV operating continuously at principle exhaust flow rate and
Ventilation with SRE as per applicable compliance package required in As proposed.
Subsection 3.1.1.
Drain Water Heat Recovery Drain water heat recovery units as per Article 3.1.1.12. As proposed.
Fuel or energy type: Same as proposed(2)
Equipment: Furnace and water tank.
Heating System and Service Water
As proposed.
Heating
Efficiency: As per applicable compliance package required in
Subsection 3.1.1. Where it is not specified, as per applicable
provincial regulations.
As proposed but must comply
Plumbing Complies with Part 7 of the Building Code. with Part 7 of the Building Code
or exceed.
Energy type: Electric.
Cooling System, if proposed(3) Equipment: Same as proposed. As proposed.
Efficiency: As per applicable provincial regulations.
Column 1 2 3
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 3.1.2.1. (Cont’d)
Specification for the Reference and Proposed Building Design
Forming Part of Sentence 3.1.2.1.(4)
Building Component Reference Building Design Proposed Building Design
Except as indicated in this Subsection and the Building Code, for the purpose of annual energy
Operating Conditions / Default
use simulations, the same operating conditions and default values shall be used for the reference
Values
building and the proposed building.(4)
For both the reference building and the proposed building, input methodologies shall be the same
All Components, and consistent with each other, e.g. use
Inputs for assemblies, • Either user defined or build-up inputs for building envelope assemblies,
workmanship, etc. • The same insulation installation quality; and
• The same air tightness for the ductwork.
Internal gains, electrical loads, other
components and characteristics that The same values or systems shall be used for both the reference building and the proposed
are not described in this Subsection building.
and Subsection 3.1.1.
Column 1 2 3
Notes to Table 3.1.2.1.:
(1) Except where principle heating fuel is wood or wood products.
(2) For the purpose of annual energy use simulations, where an air or water source heat pump, or an earth energy system is proposed,
the fuel or energy source of the reference building system is permitted to be the same as the supplementary (back up) energy source
of the proposed heat pump system.
(3) Where cooling is proposed, annual energy use simulations shall include cooling system.
(4) Operating conditions consistent with Section 4.6 of NRCan’s EnerGuide Rating System Version 15.1 may be used.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
3.1.3.1.Other Acceptable Compliance Methods (See Appendix A.)
(1) A building shall be deemed to be in compliance with the requirements of Subsection 3.1.1.
(a) Provided that the same performance level is achieved through the technical requirements of NRCan,“Energy Star for
New Homes Standard Version 12.6." or,
(b) The building meets the NRCan,“2012 R2000 Standard”.
Page 36 • SB-12
2024MMA Supplementary Standard SB-12
Appendix A
Explanatory Material for SB-12
Chapter 1: General
1.3.2.1.(2) Defined Terms
Effective RSI Value and U-Value Calculations
Effective RSI values and U values are to be calculated in accordance with good practice. Some sample effective R value
calculations are provided below. Overall thermal transmittance (U values) can be calculated by taking the inverse of
the effective R value (U=1/(effective RSI value)
Information on the calculation of effective thermal resistance of opaque assemblies can also be found at the following
NRCan website http://www.nrcan.gc.ca/energy/efficiency/housing/new-homes/energy-star/14176 . The combined
values for the stud and cavity insulation components used below are taken from the same website. Further details can
be found under "Tables for Calculating Effective Thermal Resistance of Opaque Assemblies".
Sample effective RSI values:
Ceiling with Attic Space - RSI Nominal 8.80
Details Effective RSI
Roof sheathing (above vented air space, therefore
excluded from calculation)
Vented roof air space 0.03
RSI 6.69 (R38) nominal of blown in cellulose 6.69
Roof truss bottom chord dimensional lumber -
38 mm x 89 mm (2" x 4"),
1.76
610 mm (24") on-centre,
RSI 2.11 (R12) nominal cavity fill between bottom chords
Polyethylene vapour retarder (negligible contribution to
effective thermal resistance)
12.7 mm (1/2”) gypsum board 0.08
Air film interior, ceiling 0.11
Total 8.67
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Above Grade Wall - RSI Nominal 3.87 + 0.88 ci (vinyl)
Details Effective RSI
Air film exterior 0.03
Exterior Finish* - Siding - vinyl, hollow-backed 0.11
RSI 0.88 (R5) XPS sheathing 0.88
Stud dimensional lumber –
38 mm x 140 mm (2" x 6")
2.55
406 mm (16") on-centre
RSI 3.87 (R22) nominal cavity fill between studs
Polyethylene vapour retarder (negligible contribution to
effective thermal resistance)
12.7 mm (1/2”) gypsum board 0.08
Air film interior 0.12
Total 3.77
* Where exterior finish is brick, brick and air gap values are permitted to be
substituted for siding.
Basement Wall* - RSI Nominal 3.52 ci
Details Effective RSI
Concrete foundation wall, 200 mm (8”) 0.08
RSI 3.52 (R20) blanket 3.52
Air film interior 0.12
Total 3.72
* Where the basement is finished or drywall installed, drywall and other
components that contribute to effective RSI value will be added.
Below Grade Slab - RSI Nominal 1.76
Details Effective RSI
Air film interior 0.16
Concrete slab, 100 mm (4”) 0.04
RSI 1.76 (R10) XPS sheathing 1.76
Total 1.96
Page 38 • SB-12
2024MMA Supplementary Standard SB-12
Exposed Floor - RSI Nominal 5.46 (carpet)
Details Effective RSI
Air film exterior 0.03
12.7 mm (1/2”) gypsum board 0.08
Dimensional lumber joist -
38 mm x 235 mm (2" x 10"),
4.46
406 mm (16") on-centre,
RSI 5.46 (R31) nominal cavity fill
Polyethylene vapour retarder (negligible contribution to
effective thermal resistance)
15.5 mm (5/8”) OSB 0.16
Carpet and underpad 0.36
Air film interior 0.16
Total 5.25
Continuous Insulation (ci)
Continuous insulation (ci) is intended to minimize the thermal bridges in an assembly. It is generally uninterrupted
across all structural members. Exceptions to this include fasteners and service openings. Insulation may generally be
installed on the interior or the exterior, or may be integral to any opaque surface of the building envelope. It may
generally be made of various material such as board, blanket, sprayed or other types of insulation. Compressions such
as blanket fasteners are permitted.
A-Table 1.4.1.2. National Fenestration Rating Council.
Name Address Contact
National Fenestration Rating Council ph: 301-589-1776
NFRC 6305 Ivy Lane, Suite 140 fax: 301-589-3884
Greenbelt, MD 20770, USA web site: www.nfrc.org
Column 1 2 3
Chapter 2: Reserved.
e1 Chapter 3: Acceptable Solutions for Achieving Energy Efficiency
Compliance.
A-3.1.1. Compliance Packages.
Individual components of compliance packages found in Tables 3.1.1.2.A to 3.1.1.2.C and Tables 3.1.1.3.A to 3.1.1.3.C are
not permitted to be mixed with similar components of other compliance packages either found within the same Table or
similar components of compliance packages found in other Tables.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
A-3.1.1.1.(3) Mechanical Equipment.
Compliance package tables referred to in this Sentence contain energy efficiency requirements for some or all mechanical
equipment. Where a compliance package includes an energy efficiency level for space heating equipment, domestic water
heater or heat or energy recovery ventilator, conformance with the package can only be achieved if the building is equipped
with the mechanical equipment specified in the compliance package.
A-3.1.1.1.(7), (8) and (9) Fenestration to Wall Ratio.
When the fenestration to wall ratio is calculated, all fenestration areas and the entire peripheral wall above grade is included.
The peripheral wall area includes floor rim board areas and all above grade wall areas. It is essentially the sum of the above
grade walls that separate conditioned spaces from unconditioned spaces, and adjacent units. In the case of an attached
garage, the walls that are common with the house and the garage are also included in the wall area calculations. For attached
homes, the above grade portions of the walls that are common to other conditioned units are also included in the wall area.
The fenestration area is based on the rough structural opening provided for windows, skylights, sliding glass doors, and for
glazed portions in doors. For A–frame structures with steeply inclined roofs that also act as walls, the roof portion that
serves as the interior wall area can be considered as the wall area in calculating the fenestration to wall ratio.
Where the window performance needs to be upgraded in accordance with Sentence 3.1.1.1.(8), upgrading can be done based
on ER values in conjunction with Table 3.1.1.9.
A-3.1.1.1.(16) Heat or Energy Recovery Ventilators.
Heat or energy recovery ventilators are required regardless of the type of heating system and not restricted to forced air
heating systems only.
A-3.1.1.2.(5) and (6) ICF Walls.
The use of ICF walls are not limited to the packages identified in these Sentences. Where U value or effective RSI value of a
ICF wall assembly is the same or better than the U value or effective RSI value required for a wall assembly in any of the
Tables, the ICF wall can be used in lieu of that assembly.
A-3.1.1.3.(5) and (6) ICF Walls.
The use of ICF walls are not limited to the packages identified in these Sentences. Where U value or effective RSI value of a
ICF wall assembly is the same or better than the U value or effective RSI value required for a wall assembly in any of the
Tables, the ICF wall can be used in lieu of that assembly.
A-3.1.1.4. Airtightness.
This provision is a voluntary provision. It only applies if credit for airtightness is claimed. Credit for air tightness allows
the designer to substitute the requirements of compliance packages as set out in Table 3.1.1.4.B or 3.1.1.4.C. Neither the
air leakage test nor compliance with airtightness targets given in Table 3.1.1.4.A are required, unless credit for airtightness
is claimed. Table 3.1.1.4.A provides airtightness targets in three different metrics; ACH, NLA, NLR. Where credit for
substitution is claimed, any one of these metrics can be used; the building need not meet all targets in different metrics.
A-3.1.1.7.(1) Permitted Basement Insulation Gap.
The provision refers to the gap between basement insulation and the floor level that might be left at the bottom of a
foundation wall. Insulation can be extended from the underside of the subfloor to the floor level of the basement, or a gap
may be left provided that the gap is not more than 200 mm when measured from floor level to where the insulation is
terminated.
A-3.1.1.7.(5) and (6) Slab Insulation.
Except heated slabs and except where specifically required in a compliance package, the entire surface of the slab is only
required to be insulated when the entire concrete slab is located completely within 600 mm of the exterior ground level. A
typical example would be a slab on ground construction without a basement. If a slab is located partially at the exterior
ground level (i.e. a walkout basement) or partially within 600 mm of the exterior surface, then only those sections are
required to be insulated with perimeter insulation. The perimeter insulation could be horizontal or vertical. If the entire
surface of the slab is insulated, or the perimeter insulation is horizontal, in both cases vertical insulation would not be
mandatory.
Page 40 • SB-12
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2024MMA Supplementary Standard SB-12
A-3.1.1.11.(1) Additions to Existing Houses.
In Clause 3.1.1.11.(1)(a), the design and construction of an addition to an existing house can conform to the minimum
building envelope and mechanical equipment requirements where an applicable compliance package is selected from
Article 3.1.1.2. or 3.1.1.3.
Alternatively, Clause 3.1.1.11.(1)(b) provides a simpler approach and permits an addition to an existing building to comply
with the appropriate column in Table 3.1.1.11. since the design and construction of an existing building is unlikely to be
determined and matched against an applicable compliance package from Article 3.1.1.2. or 3.1.1.3. However, the addition
is required to comply with Sentences 3.1.1.1.(7) to (10). Glazing upgrade of the addition is required if it falls within the
scope of Sentence 3.1.1.1.(8). Table 3.1.1.11. further exempts both an addition and an existing building from conforming
to minimum efficiency requirements for HRV’s, domestic water heaters and space heating equipment required in Article
3.1.1.2. or 3.1.1.3. This would permit existing mechanical equipment to serve the entire building provided that it has the
necessary capacity.
A-3.1.1.11.(2) Treatment of Additions.
Where the fenestration to wall ratio of an addition is calculated or the annual energy use of an addition is modeled for the
purpose of demonstrating compliance, calculations can be done for only the addition or the for entire house including the
existing part of the house. Regardless, the thermal characteristics of the existing building, existing window and wall areas
can be used in the fenestration ratio calculations. Similarly, in the case of modeling, existing building components that
have not been altered can be used as they are for the reference house and for the proposed design.
A-3.1.1.11.(3) Sunroom Additions to Existing Houses.
A sunroom addition to an existing house referred in this Sentence applies to a one-storey structure built substantially with
wall/roof fenestration and glass doors but which sometimes contain unglazed low wall panels that support wall glazing
above it. Since the glazing percentage of sunrooms exceeds the limits permitted for compliance packages in
Articles 3.1.1.2. and 3.1.1.3. and performance compliance methods may not be possible, these sunrooms are exempt from
compliance package requirements, provided that the thermal performance of the glazing is enhanced further than what is
required for non-sunroom additions.
The maximum U-Values for doors, sliding glass doors, wall glazing and supporting wall panels for sunroom additions in
Clause 3.1.1.11.(3)(a) have been derived from the maximum U-Values for window and sliding glass doors in additions to
existing buildings in Table 3.1.1.11. and then upgraded in accordance with Sentence 3.1.1.1.(8).
The maximum U-Value of 2.6 for roofs and skylights for sunroom additions in Clause 3.1.1.11.(3)(b) has been derived
from upgrading the maximum U-Value of 2.8 for skylights in additions to existing buildings in Table 3.1.1.11. consistent
with the methodology used in Sentence 3.1.1.1.(8).
A-3.1.1.12.(1) Shower Drainage Installation.
The term “all showers” includes the case where there is only one shower in a dwelling unit. If there is only one shower, that
shower is required to be connected to a drain water heat recovery unit. Where there are two or more showers, drain water
from at least two showers are required to be connected to a single drain water heat recovery unit or to two individual drain
water heat recovery units.
A-3.1.2.1. Application of Performance Compliance Path.
This Article requires two annual energy use simulations. These simulations compare the simulated annual energy use of
the proposed building with the simulated annual energy use of an applicable compliance package. The simulated annual
energy use of the proposed building cannot exceed the simulated annual energy use of an applicable compliance package.
Where a performance compliance path is selected, it is the intent of Sentence 3.1.2.1.(2) that the performance level of the
compliance package takes into account the requirements listed in Subsection 3.1.1. that are applicable to that compliance
package. Similarly, the annual energy use calculation for a compliance package referenced in Sentence 3.1.2.1.(3) shall
take into account the requirements listed in Subsection 3.1.1. that are applicable to that compliance package. In addition to
Subsection 3.1.2., the proposed building is still required to meet Part 12 and other applicable parts of the Code.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
The air leakage rates in Table 3.1.2.1. are not requirements. The Table is not intended to require or suggest that the building
meet those airtightness targets. They are provided only as default or reference values for the purpose of annual energy
simulations, should the builder/owner decide to perform such simulations. They are given in three different metrics; ACH,
NLA, NLR. Any of them can be used. They can be used as a default values for both a reference and proposed building or,
where an air leakage test is conducted and credit for airtightness is claimed, the airtightness values in Table 3.1.2.1. can be
used for the reference building and the actual leakage rates obtained from the air leakage test can be used as inputs for the
proposed building.
Annual Energy Use Software: For the purpose of calculating the annual energy use of a proposed design and a design based
on a selected compliance package, the following software may be used:
• HOT2000 version 10.51 or later versions
• other software referenced by the EnerGuide Rating System
• Passive house software such as
• WUFI Passive
• Passive House Planning Package
• RESNET accredited Home Energy Rating System (HERS) software, such as:
• ICF International Beacon Residential Version 2-80-3
• Ekotrope, HERS Module v2.0
• EnergyGauge® USA Version 5.0
• REM/Rate v14.6.2
Operating Conditions:
The following operation conditions may be used:
(Courtesy of NRCan- Section 4.6 of NRCan’s EnerGuide Rating System Version 15.2)
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
4.6.1.General
The EnerGuide Rating System applies two sets of operating conditions to provide EnerGuide Rating System services:
standard operating conditions and household operating conditions.
Standard operating conditions are used as the basis for the calculation of the EnerGuide rating in order to provide an estimate
of the home’s energy performance independent of occupant behaviour. Houses that reach a zero rating have access to reduced
operating conditions for their rating calculations.
Optionally provided by homeowners, household operating conditions are intended to provide customized operating
conditions in order to generate an estimated annual energy use based on actual occupancy.
The rated annual energy consumption of a house is based on a number of standard assumptions as specified in section 4.6.3.
4.6.2.1.Number of occupants
The EnerGuide rating is calculated assuming an occupant load of two adults and one child at home 50% of the time.
4.6.2.2.Temperature set points for space heating and cooling
The EnerGuide rating is calculated assuming standard thermostat settings (set points) for space heating and cooling as per
Table 2.
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2024MMA Supplementary Standard SB-12
Table 2 - Temperature set points
Area of house Type of set point Temperature
heating daytime (16 hours) 21°C (70°F)
Main and upper floors
heating nighttime (8 hours) 18°C (64°F)
cooling 25°C (77°F) if air conditioning present
heating 19°C (66°F)
Basement / walkout
25°C (77°F) if air conditioning ducted to
cooling
basement
Heated crawl space heating 15°C (59°F)
Notes to Table 2:
(1) A constant weighted average of 20 degrees Celsius is used to simulate the effect of the heating setback temperature.
(2) Air conditioning can include heat pump space cooling systems.
(3) If air conditioning is not ducted to the basement, the approved compliance software will allow the basement temperature to vary.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
4.6.2.3.Hot water load
The EnerGuide rating is calculated assuming that the occupants collectively use approximately 190 litres (50 U.S. gal) of hot
water per day (for showers, clothes washing, dishwashing and faucets) and that the water is heated to 55°C (131°F). Shower
temperature is held constant at 41°C (106°F) leading to some variability in the shower hot water load due to variations in
regional cold water inlet temperatures. The shower hot water load ranges from 89 L/day (24 U.S. gal/day) in the warmest
region to 100 L/day (26 U.S. gal/day) in the coldest. The 97 L/day (26 U.S. gal/day) of hot water usage applied to activities
other than showering is constant across all weather locations. In total, the hot water usage will range from 178 L/day
(47 U.S. gal/day) to 199 L/day (53 U.S. gal/day).
4.6.2.4.Electrical base loads
The EnerGuide rating is calculated assuming that a standard amount of electricity (electrical base loads) is used as defined in
Table 3 and Table 4.
It is always assumed that the house has an electric range and electric clothes dryer. It is also assumed that the clothes dryer
exhausts to the outside and operates at a flow rate of 38 L/s (158 cfm), 45 minutes a day, 365 days per year.
Table 3 - Standard electrical base loads
Electrical load Standard value (kWh/day)
Interior lighting 2.6
Appliances (refer to Table 4) 6.3
Other electrical 9.7
Exterior use (exterior lighting and miscellaneous outdoor use) 0.9
Daily total 19.5
Annual total 25.6 GJ/year
Electrical load Standard value (kWh/day)
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
Table 4 - Standard appliance loads
Appliance Standard value (kWh/yr)
Refrigerator 639
Electric range 565
Clothes washer 148
Dishwasher 260
Clothes dryer 687
Annual total for above 5 appliances 2299
Daily total for above 5 appliances 6.3 kWh/day
Notes to Table 4:
(1) Standard appliance ratings assume four occupants while the EnerGuide Rating System for homes assumes three occupants.
Therefore, the loads for clothes washers and clothes dryers have been reduced by 25% to remain consistent with the rating system
standard operating conditions.
(2) Freezer and microwave electrical consumptions are included in the “Other electrical” category.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
4.6.2.5.Reduced operating conditions for zero-rated homes
For homes with superior energy performance, there is provision for reducing some of the standard operating conditions.
These reduced operating conditions are considered to be a variation of the standard operating conditions. To be eligible for
these reductions, the builder or homeowner must provide the energy advisor with proof that the required conditions, as
specified below, are met and the EnerGuide rating for the house must be zero when modelled with the reduced values.
a) Allowable hot water reductions
Zero-rated homes may reduce their hot water load by the specified amount for each of the conditions they meet in Table 5.
The four categories may be applied on an individual basis.
Table 5 - Allowable hot water reductions for zero-rated homes
Approximate reduction
Category Specification
L/day (U.S. gal/day)
Low-flow showerheads 7.6 L/min (2.0 U.S. gpm) or less 19 (5.0)
Low-flow bathroom faucets 5.7 L/min (1.5 U.S. gpm) or less 10 (2.6)
Clothes washer ENERGY STAR certified 18 (4.8)
Dishwasher ENERGY STAR certified 3 (0.8)
Approximate total potential reduction 50 (13.2)
Notes to Table 5:
(1) Showerhead water reductions are calculated by the approved compliance software based on incoming water temperature, flow rate
and a shower length of seven minutes. Therefore, the 19 L/day (5.0 U.S. gal/day) for showerheads and the total potential reduction
are approximate numbers.
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2024MMA Supplementary Standard SB-12
b) Allowable electrical base loads reductions
Zero-rated homes may reduce their electrical base loads for interior lighting and appliances as detailed in Table 6. The
“Other electrical” and “Exterior use” categories may not be reduced.
Table 6 - Allowable electrical base loads for zero-rated homes
Category Conditions Allowable reduced base load
25% to 75% of fixtures with compact fluorescent light bulbs or
1.6 kWh/day
light emitting diodes
Interior Lighting
> 75% of fixtures with compact fluorescent light bulbs or light
0.6 kWh/day
emitting diodes
The actual EnerGuide appliance rating must be lower than the
following standard values: Use the actual EnerGuide appliance
• Refrigerator: 639 kWh/yr rating
Appliances • Electric range: 565 kWh/yr
• Dishwasher: 260 kWh/yr If an appliance is not present,
• Clothes washer: 197 kWh/yr default values must be used
• Clothes dryer: 916 kWh/yr
Notes to Table 6:
(1) Gas appliances will not be considered as a reduction to electrical base loads.
A-3.1.3.1. Other Acceptable Compliance Methods.
Compliance with this Supplementary Standard may be achieved using either the prescriptive path or the performance path
required by NRCan,“Energy Star for New Homes Standard Version 12.6”, provided that the same performance level is
achieved through its technical requirements. Compliance with the technical requirements of NRCan, “2012 R-2000
Standard” also achieves compliance with this Supplementary Standard.
Only the technical provisions contained in NRCan, “2012 R-2000 Standard” or NRCan, “Energy Star for New Homes
Standard Version 12.6” and other Energy Star documents it references are mandatory under this Supplementary Standard.
However, in addition to the technical requirements, the administrative requirements of the Energy Star or R-2000
documents may be used to demonstrate compliance with Sentence 3.1.3.1.(1) by obtaining an Energy Star or R-2000 label
for the building.
This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.
2024MMA Supplementary Standard SB-12
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Ministry of Municipal Affairs and Housing
Building and Development Branch
MMAH Supplementary Standard SB-13
MMAH Supplementary Standard SB-13
Glass in Guards
January 1, 2024
2024MMAH Supplementary Standard SB-13
COMMENCEMENT
MMAH Supplementary Standard SB-13 comes into force on the 1st day of January 2025.
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