Energy Efficiency Design Summary: Prescriptive Method
(Building Code Part 9,
This form is used by a designer to demonstrate that the energy efficiency design of a house complies with the building code using the
prescriptive method described in Subsection 3.1.1. of SB-12. This form is applicable where the ratio of gross area of
windows/sidelights/skylights/glazing in doors and sliding glass doors to the gross area of peripheral walls is not more than 22%.
For use by Principal Authority
Application No: Model/Certification Number
A. Project Information
Building number, street name
Unit number
Postal code
Reg. Plan number / other description
B. Prescriptive Compliance [indicate the building code compliance package being employed in this house design]
SB-12 Prescriptive (input design package): Package: _____________ Table:_____________
C. Project Design Conditions
Climatic Zone (SB-1):
Space Heating Fuel Source
Zone 1 (< 5000 degree days)
Gas Propane Solid Fuel
Oil Electric Earth Energy
Zone 2 (≥ 5000 degree days)
Ratio of Windows, Skylights & Glass (W, S & G) to Wall Area
Other Building Characteristics
Area of walls =
Log/Post&Beam ICF Above Grade ICF Basement
Slab-on-ground Walkout Basement
Air Conditioning Combo Unit
Air Sourced Heat Pump (ASHP)
Ground Sourced Heat Pump (GSHP)
Area of W, S & G = _
D. Building Specifications [provide values and ratings of the energy efficiency components proposed]
Energy Efficiency Substitutions
ICF ( & (6) / & (6))
Combined space heating and domestic water heating systems ( /
Airtightness substitution(s)
Airtightness test required
(Refer to Design Guide Attached)
Table Required: Permitted Substitution:
Table Required: Permitted Substitution:
Required: Permitted Substitution:
Building Component
Minimum RSI / R values
or Maximum U-Value
Building Component
Efficiency Ratings
Thermal Insulation
Windows & Doors Provide U-Value
or ER rating
Ceiling with Attic Space
Windows/Sliding Glass Doors
Ceiling without Attic Space
Skylights/Glazed Roofs
Exposed Floor
Walls Above Grade
Heating Equip.(AFUE)
Basement Walls
HRV Efficiency (SRE% at 0
Slab (all >600mm below grade)
DHW Heater (EF)
Slab (edge only 600mm below grade)
DWHR (CSA B55.1 (min. 42% efficiency))
# Showers___
Slab (all 600mm below grade, or heated)
Combined Heating System
(1) U value to be provided in either W/(m
K) or Btu/(hft
F) but not both.
E. Designer(s) [name(s) & BCIN(s), if applicable, of person(s) providing information herein to substantiate that design meets the building code]
Qualified Designer Declaration of designer to have reviewed and take responsibility for the design work.
Form authorized by OHBA, OBOA, LMCBO. Revised December 1, 2016.
click to sign
click to edit
Guide to the Prescriptive Energy Efficiency Design Summary Form
This form must accurately reflect the information contained on the drawings and specifications being submitted.
Refer to Supplementary Standard SB-12 for details about building code compliance requirements. Further
information about energy efficiency requirements for new buildings is available from the provincial building code
website or the municipal building department.
The building code permits a house designer to use one of four energy efficiency compliance options:
1. Comply with the SB-12 Prescriptive design tables (this form is for this option (Option 1)),
2. Use the SB-12 Performance compliance method, and model the design against the prescriptive standards,
3. Design to Energy Star, or
4. Design to R2000 standards.
B. Compliance Options
Indicate the compliance option being used.
SB-12 Prescriptive requires that the building conforms to a package of thermal insulation, window and
mechanical system efficiency requirements set out in Subsection 3.1.1. of SB-12. Energy efficiency design
modeling and testing of the building is not required under this option. Certain substitutions are permitted. In
which case, the applicable airtightness targets in Table must be met.
C. Project Design Conditions
Climatic Zone: The number of degree days for Ontario cities is contained in Supplementary Standard SB-1
Windows, Skylights and Glass Doors: If the ratio of the total gross area of windows, sidelights, skylights, glazing
in doors and sliding glass doors to the total gross area of walls is more than 17%, higher efficiency glazing is
required. If the ratio is more than 22%, the SB-12 Prescriptive option may not be used. The total area is the sum of all
the structural rough openings. Some exceptions apply. Refer to of SB-12 for further details.
Fuel Source and Heating Equipment Efficiency: The fuel source and efficiency of the proposed heating
equipment must be specified in order to determine which SB-12 Prescriptive compliance package table applies.
Other Building Conditions: These construction conditions affect SB-12 Prescriptive compliance requirements.
D. Building Specifications
Thermal Insulation: Indicate the RSI or R-value being proposed where they apply to the house design. Under
the SB-12 Prescriptive option, alternative ICF wall insulation is permitted in certain conditions where other
design elements meet higher standards. Refer to SB-12 for further details. Where effective insulation values
are being used, the Authority Having Jurisdiction may require supporting documentation.
All houses must comply with increased air barrier requirements in the building code. Notice of air barrier
completion must be provided and an inspection conducted prior to it being covered.
The air leakage rates in Table are not requirements. This provision is a voluntary provision for when
credits for airtightness are claimed. Credit for air tightness allows the designer to substitute the requirements of
compliance packages as set out in Table or Neither the air leakage test nor compliance with
airtightness targets given in Table are required, unless credit for airtightness is claimed. Table provides airtightness targets in three different metrics; ACH, NLA, NLR. Any one of them can be used.
OBC Reference Default Air Leakage Rates (Table
Building Type
Airtightness Targets
ACH @ 50 Pa
NLA @ 10 Pa
NLR @ 50 Pa
Detached dwelling
1.26 cm
1.81 in
0.93 L/s/m
0.18 cfm50/ft
Attached dwelling
2.12 cm
3.06 in
1.32 L/s/m
0.26 cfm50/ft
The building code requires that a blower door test be conducted to verify the air tightness of the house during
construction if the SB-12 Prescriptive option with airtightness credit being applied. Results of the airtightness
test may need to be submitted to the Authority Having Jurisdiction. Airtightness of less than 2.5 ACH @ 50 Pa
(or NLA or NLR equivalent) in the case of detached houses, or 3.0 ACH @ 50 Pa (or NLA or NLR equivalent) in
the case of attached houses is necessary to meet the required energy efficiency standard.
E. House Designer
The building code requires designers providing information about whether a building complies with the building
code to have a BCIN. Exemptions apply to architects, engineers and owners designing their own house.
Form authorized by OHBA, OBOA, LMCBO. Revised November 30, 2016.