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Council PresentationJuly 12, 2016
Building By-law Amendments:Aligning Energy Efficiency in
Low-Rise Residential
Chris HigginsGreen Building Planner
Planning, Urban Design & SustainabilityFebruary 7, 2017
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Outline
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1. Goals
2. Next step in the Zero Emissions Building Plan
3. Specific by-law updates
4. Cost
5. Very large homes
6. Consultation
7. Permitting
8. Outcomes
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Goals
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1. Align requirements
2. Limit carbon pollution
3. Maintain choice
4. Health and comfort
5. Lower operating costs
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New Building Emissions and Targets
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Weighted Average GHG Intensity of New Buildings (all types)
Most of the reduction here was from single family code changes
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Sources of Carbon Pollution in New Low-riseMulti Unit Residential Buildings (MURB)
5Recommended changes would reduce carbon pollution 40% - 55% for new low-rise multi-family buildings
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Specific Updates
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Building By-lawTwo Pathways to Real and Reliable GHG Reductions
Prescriptive Path (All)
• Simple efficiency requirements
• Typical fuels
• Energy modeling not required
Performance Path (4-6)
• Design flexibility
• Space Heating, GHG, and overall energy use limits
• Requires energy modelling
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Aligning Prescriptive Requirements
1. Envelope (walls, windows, roof)
2. Mechanical
3. Measuring air tightness
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Prescriptive Requirements
Components Metric(Imperial)
1&2 Family(Existing)
Townhomes and MURB<4
MURB 4-6 Storey
Walls RSI 3.85 (R22) 3.85 (R22) 3.85 (R22)
Windows + sliding glass doors
U1.4 (0.25) U1.4 (.25) U1.4 (.25)
Airtightness Testing + Target Testing + Target Testing + Target
Domestic Hot Water 78% 78% 78%
Furnace / Make up air 92% 92% 92%
Metric & Effective: (Imperial) numbers provided for information only, regulation will be metric
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Wood wall example
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Performance Path for 4-6 storey
Bylaw Total Energy Use
Space Heating
Greenhouse Gas Intensity
Total EUIkWh/m2
TEDIkWh/m2
GHGIKg/m2
Proposed By-lawrequirements
110 25 5.5
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Alternative Compliance PathA Pathway to Real and Reliable GHG Reductions
• Zero Emissions Building Plan Requirement
• Staff will report back Summer 2017
• Update mandatory connection requirements to they only apply when low carbon supply secured
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Cost of Building Code Energy Alignment
• Builder input
• Stakeholder Review
• GVHBA surveyed members
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Cost of Building Code Example
For a 950sf suite this means a change of
• $3.50/ft2 or 0.35% of sales price
• Monthly Mortgage payment: +$11
• Monthly energy bill: -$20
• Occupant Savings = $9
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Demonstrating leadership with very large homes
• Average new home size in Vancouver: 2,600 sq ft
• Average new home size in BC: 1,900 sq ft
• This policy would apply only to single family homes 3,500 sq ft or larger
• Requires new homes 3,500+ sq ft to have the same greenhouse gas footprint as a 3,500 sq fthome
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Stakeholder Consultation
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Stakeholder Consultation
• Greater Vancouver Homebuilders Association
• Urban Development Institute
• Landlord BC
• Condominium Home Owners Association
• Association of Professional Engineers and Geoscientists of BC
• Architectural Institute of BC
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Stakeholder Consultation
Two biggest issues:
• Wall thickness
• Implementation date
Stakeholder support
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Permitting
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Industry Training, Education and Materials
• Develop guidance and training materials
• Updated R22 insulation guide for multi family
• Hosting education and awareness sessions
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Training and Education
• EnerGuide Advisor
• Training and support for permit staff pre and post launch
• Educational sessions for industry
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Clarifications
• EV requirements: No change
• Drain Water Heat Recovery: Exemption request for electric townhomes
• Electrical bylaw: Simply closes a loophole
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Outcomes
• Harmonized and simplified building code
• 40% - 55% reduction in carbon pollution
• 40% reduction in energy use
• Improved comfort and health
• Lower cost on a monthly basis for homeowners and renters
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Questions
End