New Energy Efficiency Requirements in BC Zachary May Codes Administrator Building and Safety Standards Branch

BCBEC - Sept 2013

TODAY

Dec. 20 2013

Dec. 19 2014

TODAY

Dec. 20 Dec. 19 Part Efficiency 201310 – Energy2014

•Part 3 (Large Buildings) • ASHRAE 90.1 (2004) •Part 9 (Small Buildings) • Insulation tables • Water efficiency

TODAY

Dec. 20 Dec. 19 Part 201310 (Compliance) 2014

•Part 3 (Large Buildings) • Letters of Assurance • Single standard • Prescriptive / Trade-offs •Part 9 (Small Buildings) • “Stuff the gaps”

Dec. 20 2013

Dec. 19 • Part 3 (Large Buildings) 2014 • ASHRAE 90.1 (2004) • ASHRAE 90.1 (2010)

• National Energy Code for Buildings (NECB) • Water efficiency

Dec. 20 2013

Dec. 19 • Part 3 (Compliance) 2014

• Letters of Assurance

Dec. 20 2013

Dec. 19 • Part 3 (Compliance) 2014

• Letters of Assurance • Available at bccodes.ca

ASHRAE 90.1 (2010) & NECB (2011)

BCBC 2012

Vancouver BB

ASHRAE 90.1 (2004)

ASHRAE 90.1 (2007)

ASHRAE 90.1 (2010) & NECB (2011)

ASHRAE 90.1 (2010) & NECB (2011)

Where do they come from? •American Society of Heating, Refrigerating and Air-Conditioning Engineers •Now a global society with 50,000 members worldwide •Industry standard

Where do they come from? •National Energy Code for Buildings •Canadian Commission on Building and Fire Codes (NRC) •Canadian standard developed with input from NRCan and industry stakeholders

What’s the difference? •Building construction materials •Occupancy and building design •Climate region •Energy use vs. Cost of energy •Industry familiarity •New value opportunities

What’s the difference? NECB •Energy based •Trade-offs throughout •Reference to Canadian standards ASHRAE •Energy-cost based •Trade-offs for envelope only •Reference to performance requirements

What’s the difference? NECB •Flexible •Complex compliance •Good - excellent performance ASHRAE •Prescriptive •Less complex compliance •Good - excellent performance

Key details: NECB •Clear values for envelope components •Stringent air-leakage rates ASHRAE •Multiple values for envelope components •Less stringent air-leakage rates

Key details: NECB •40 % FWR – few trade offs •FWR indexed to heating degree days ASHRAE •40% FWR across all regions •Trade offs allow for up to 70% glazing •Beyond 70% - ECB

Key details: NECB •Stringent insulation requirements •Walls/roofs/slabs •Required full slab insulation (unheated) ASHRAE •Generally less stringent insulation requirements •Optional slab insulation in some areas

Key details: NECB •Window requirements are generally more stringent •Some curtain wall assemblies may not comply ASHRAE •Complex thermal performance consideration

Key details: NECB •Heat recovery in ice arena equipment ASHRAE •Pool covers •Heat recovery from fume and kitchen exhaust equipment

What’s the impact? •Highly dependent on occupancy

•Possibly unfamiliar standards •New approaches and designs •Regional considerations

What’s the impact? •Integrated design with trade-offs

•Controls and system maintenance vs. envelope design and thermal performance •The tenant variable

Referenced studies: •BC Energy Code Comparison – Stantec (2012)

•ASHRAE 90.1 2010 and NECB 2011 Cross Canada Comparison – Caneta Research (2012) •ASHRAE 90.1-2004, ASHRAE 90.1-2010 and NECB 2011 for British Columbia – Enersys Analytics (2011)

Dec. 20 2013

Dec. 19 2014 •ASHRAE Checklist •NECB Checklist

•Education

Dec. 19 2014

Dec. 19 • Part 9 (Small Buildings) 2014 • Insulation tables •9.36. – Energy Efficiency

• 9.32. – Ventilation

Dec. 19 2014

Dec. 19 • Part 9 (Small Buildings) 2014 • Insulation tables • 9.32. – Ventilation

Public Review housing.gov.bc.ca/building

Energy Efficiency - BC Building Envelope Council

•Canadian Commission on Building and Fire Codes (NRC). •Canadian standard developed with input from ... •Controls and system maintenance vs. envelope ...

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