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Ontario Building Code Breakfast
SB-10 Implications on Design
Michelle Xuereb
Associate, Sustainability Strategist
29 April 2014
OBC Application in GTAToronto Green Standard
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Table of Contents
1 Toronto Green Standard1. Toronto Green Standard
2. Exterior Building Envelope
3. Thermal Bridging
4. Energy Modeling
5. Project Results
6 Conclusions6. Conclusions
Exterior Building EnvelopeMandatory Provisions
ADAPTABILITY FLEXIBILITY
DURABILITY
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Exterior Building EnvelopeMandatory Provisions
• From OBC and SB-10 Checklis
Exterior Building EnvelopeInsulation Values
• Excerpt from SB-10 Tables SB5.5-1 to 5.5-8
• Air Leakage Rates
• Window U Values
Select• Window U-Values
1. Climactic Zone
2. Wall/Roof Assembly - Insulation R-Value
3. Window Assembly - Window U-Value
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Exterior Building EnvelopeEffective R-Value vs. Nominal R-Value
• Excerpt from ASHRAE 1365
• Air Leakage Rates
• Window U Values
Effective R-Values• Window U-Values
• Continuous Insulation is about the insulation performance
• Adding more insulation does not mean higher effective R-Value
Exterior Building EnvelopeThermal Bridging
From: Mossison Hershfield “Solutions”, Floor Slab Edges Count
Details Matter
• Insulation performance is related directly to the details
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Energy ModelingArchetype Condo Project
Archetype Condominium Final Report
Ch• Charrette
• Energy Modeling
Archetype Condominium Report for Sustainable Buildings Canada
Energy ModelingArchetype Condo Project
Archetype Condominium Final Report• Archetype Condominium Report for Sustainable Buildings Canada
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Energy ModelingArchetype Condo Project
Archetype Condominium Final Report• Archetype Condominium Report for Sustainable Buildings Canada
Energy ModelingArchetype Condo Project
Archetype Condominium Final Report• Archetype Condominium Report for Sustainable Buildings Canada
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Energy Modeling Window to Wall RatiosArchetype Condo Project
Archetype Condominium Final Report
1 Wh i h i f d h 1. What is the impact of reduce the area of vision glass?
Enigma
Energy Modeling Window to Wall RatiosArchetype Condo Project
Archetype Condominium Final Report
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Energy Modeling Window to Wall Ratios 70% Archetype Condo Project
Percentage refers to percentage below SB10 energy target
Energy Modeling Window to Wall Ratios 60% Archetype Condo Project
Percentage refers to percentage below SB10 energy target
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Energy Modeling Window to Wall Ratios 50% Archetype Condo Project
Percentage refers to percentage below SB10 energy target
Energy Modeling Window to Wall Ratios 40% Archetype Condo Project
Percentage refers to percentage below SB10 energy target
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Energy Modeling Window U-ValueArchetype Condo Project
Archetype Condominium Final Report
1 Wh i h i f d i h 1. What is the impact of reducing the area of vision glass?
2. What is the impact of increasing the overall performance of the fenestration?
The HighPark
Energy Modeling Window U-ValueArchetype Condo Project
Archetype Condominium Final Report
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Energy Modeling Window U-Value 70%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
Energy Modeling Window U-Value 60%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
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Energy Modeling Window U-Value 50%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
Energy Modeling Window U-Value 40%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
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Energy Modeling Opaque AssemblyArchetype Condo Project
Archetype Condominium Final Report
1 Wh i h i f d i h 1. What is the impact of reducing the area of vision glass?
2. What is the impact of increasing the overall performance of the fenestration?
3. What happens the spandrel glass is replaced with a higher performing wall assembly?
DUKE
Energy Modeling Opaque AssemblyArchetype Condo Project
Archetype Condominium Final Report
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Energy Modeling Opaque Assembly 70%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
Energy Modeling Opaque Assembly 60%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
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Energy Modeling Opaque Assembly 50%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
Energy Modeling Opaque Assembly 40%Archetype Condo Project
Percentage refers to percentage below SB10 energy target
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Comparing Energy ModelsProject Results – Compared to MNECB
25% over 1997 MNECB or SB-10 Compliance Path 1a
ConclusionsKey Issues
Summary
• Be aware of the required insulation in your climactic zone; in your climactic zone;
• Think effective R-Value rather than nominal and confirm your assumptions early;
• Energy model during design development to confirm you are meeting your energy targets;
• Minimize the percentage of glazing and specify the best possible
i d t ithi th j t window system within the project budget;
• Reduce thermal bridging through careful detailing;
• Ask a lot of questions. Engage in the dialogue.
