The Development of a

STRETCH CODE for BC

Dave Ramslie MCIP RPP LEED AP, Integral Group

Problem Statement

• Changes to the BCBC & VBBL has many Local

Governments rethinking their green Building Policies

• Bill 20 The Building Act has changed local governments

ability to incentivise green buildings

• A clear priority from both industry and the Province for

consistency

• A need to better align green building policy with local

government targets

• Mutual desire to look at new ways of approaching energy

efficient design.

Opportunity

• Develop a simpler program that focuses on Energy and

Climate Policy

• Align Utility, Local Government, and Provincial government

plans

• Design a program that aligns with Local Government

resources and risk tolerance

• Provide industry a pathway to net zero buildings

• Opportunity to create training programs and direct resources

more effectively

Participating Partners • BC Hydro

• Ministry of Housing, Building Safety Standards Branch

• Ministry of Energy

• City of Vancouver

• City of Burnaby

• City of Richmond

• City of North Vancouver

• City of Surrey

• The Pembina Institute

• The Urban Development Institute

• FortisBC

Reference Building

Market Transformation

Engagement &

Training

Incentives

Regulations

Data & Reporting

Defined Targets

Draft Objectives • Leads to consistent and substantial and real world energy and

GHG reductions (scalable for different times and jurisdictions)

• Prioritizes passive design and building envelope design over

equipment design (minimize loads 1st, maximize efficient

equipment 2nd)

• A framework that works for the next 10 years (maybe a different

target for a different LG?)

• Ability to consistently deal with existing and future low carbon

energy systems

• Improvements in process development that meets the needs and

abilities of Local Governments

• The ability to capture and track data on program performance

• Alignment of key stakeholders

Best Practice Comparison

STANDARD COMMERCIAL MULTI-FAMILY ASHRAE 90.1 % Energy Cost Reduction % Energy Cost Reduction

ASHRAE 189 Approx. 34% reduction over ASHRAE 90.1 Approx. 34% reduction over ASHRAE 90.1

BR10, Denmark 71.3 + (1650 kWh/yr/m2)

Offices, Schools, Institutions, Other

52.5 + (1650 kWh/yr/m2)

Residential, Student Accomm, Hotels

EnEV2009, Germany Meet or exceed reference building kWh/m2/yr with pre-defined

standards

Meet or exceed reference building kWh/m2/yr with pre-defined

standards

IECC % Energy Cost Reduction % Energy Cost Reduction

NECB, Canada Meet or exceed reference building kWh/m2/yr with pre-defined

standards (performance path approach)

Meet or exceed reference building kWh/m2/yr with pre-defined

standards (performance path approach)

Part L, UK (England + Wales) Meet or exceed reference building kgCO2/m2/yr with pre-defined

standards.

Meet or exceed reference building kgCO2/m2/yr with pre-defined

systems standards. (39 kWh/m2/yr - MFH 2016)

Target Performance Path, Seattle 40 kBTU/sf/yr (approx. 125 kWh/m2/yr) 40 kBTU/sf/yr (approx. 125 kWh/m2/yr)

TEK10, Norway 150 kWh/m2/yr

Office Building

115 kWh/m2/yr

Apartment Buildings

Title 24, California 97.7 kWh/m2/yr

Example office building

88.2 kWh/m2/yr

Example residential building

RT2012, France 40-65 kWh/m2/yr (50 kWh/m2/yr baseline with climate zone and

altitude coefficients)

40-65 kWh/m2/yr (50 kWh/m2/yr baseline with climate zone and

altitude coefficients)

Architecture 2030 394.7 kWh/m2/yr Site Energy Use

Ontario average value

188 kWh/m2/yr Site Energy Use

Ontario average value

Minergie, Switzerland 40 kWh/m2/yr

Public/Office Buildings

60 kWh/m2/yr

Multi-Family Housing

LEED V4 2-5% reduction in energy use compared to and ASHRAE 90.1- 2010

baseline

5% reduction in energy use compared to and ASHRAE 90.1- 2010

baseline

Living Building Challenge 105% of project’s energy needs must be supplied by on-site renewable

energy.

105% of project’s energy needs must be supplied by on-site renewable

energy.

Passivhaus 120 kWh/m²/yr Max. total primary energy demand

Max. heating / cooling demand (each) 15 kWh/m²/yr

120 kWh/m²/yr Max. total primary energy demand

Max. heating / cooling demand (each) 15 kWh/m²/yr

Global Leaders

STANDARD COMMERCIAL MULTI-UNIT RESIDENTIAL

Denmark Building Regulation 10 (BR10)

Non-Residential, Offices, School, Institutions, other

71.3 kWh/yr/m2

Residential, Student Accommodation, Hotels

52.5 kWh/yr/m²

Norway Tek10

Office building 150 kWh/yr/m² heated floor area Blocks of Flats

115 kWh/yr/m²

France Regulation Thermique RT2012

40-65 kWh/m²/yr (as per climate zone/altitude) 57.5 kWh/yr/m²

England/Wales The Building Regulations 2010

Conservation of fuel and power

Meet or exceed reference building kgCO2/m2/yr with pre-

defined envelope and building systems standards.

Meet or exceed reference building kgCO2/m2/yr with pre-

defined envelope and building systems standards.

Multi Family Housing 39 kWh/m2/yr (2016)

Germany Energy Savings Ordinance (EnEV)

Meet or exceed reference building kWh/m2/yr with

pre-defined standards.

Meet or exceed reference building kWh/m2/yr with

pre-defined standards.

California

Title 24, Part 6 97.7 kWh/m2/yrExample office building 88.2 kWh/m2/yrExample Residential Building

Seattle SEC2012 Target Performance Path

40 kBTU/sf/yr (aprox: 125 kWh/yr/m²)

40 kBTU/sf/yr (aprox: 125 kWh/yr/m²)

Passivhaus

Maximum cooling demand 15 kWh/m²/yr

Maximum space heating demand 15 kWh/m²/yr

Maximum total primary energy demand 120 kWh/m²/yr

Minergie Public/Office Buildings 40 kWh/m²/yr Multi Family Housing 60 kWh/m²/yr

Range of Performance

165 kWh/yr/m2

Norway

France

115 125

Seattle Denmark

105

UK/Wales

80

Minergie

60

MULTI-UNIT RESIDENTIAL

Regulated Loads (Estimated)

Vancouver 2014

Range of Performance

165 kWh/yr/m2

Norway

France

115 125

Seattle Denmark

105

UK/Wales

80

Minergie

60

MULTI-UNIT RESIDENTIAL

Regulated Loads (Estimated)

Vancouver 2014

Key Findings for Discussion

• Typically most high performance standards do not cover “unregulated loads”

• Typically European Codes have an EUI (both normalized and hard cap)

• Use a standard modelling tool

• Target of approximately 100 kWh/yr/m2

• Process requirements such as Airtightness Testing can drive performance

• Most have some prescriptive requirements: heating, cooling, ventilation,

airtightness, thermal bridging, thermal envelope requirements, hot water, lighting,

heat recovery,

1. Framework should be EUI Based

• Use a Thermal Demand calculation to derive EUI

• Maximize passive design

• Set a consistent benchmark

2. Carbon Intensity

UK Building Regulations

10 • Status: Mandatory

• Date of Enforcement: Jan 1st, 2013

• Metrics: kWh/m2/yr & kgCO2/m2/yr

BUILDING TYPE TARGET

Commercial

Meet or exceed reference building kgCO2/m2/yr

with pre-defined envelope and building systems

standards.

Residential

Meet or exceed reference building kgCO2/m2/yr

with pre-defined envelope and building systems

standards.

Single Family Housing 46 kWh/m2/yr (2016)

Multi Family Housing 39 kWh/m2/yr (2016)

ZERO ENERGY TARGETS Residential NZE by 2016

Key Points • Standardized software tool is

applied

• Only regulation to regulate

based on GHG production

• Applied only to regulated loads

3. Single Platform

• A single energy modeling platform for compliance

• Selection will have to be aligned with utility programs

• Find the appropriate tool for most buildings

4. Energy model

• Requirement for Energy models in all cases

• May need different tools triggered by building size

5. Energy Reporting

• Most European standards have a harmonized building

energy reporting & disclosure with building code

• Having a harmonized policy that addresses new

construction and continues into the operations of the

building is of value

• Using a simplified approach such as portfolio manager could

be of value for smaller buildings

6. Prescriptive Requirements

A limited set of prescriptive requirements:

• Lighting Power Density

• Sub-Metering (panel segregation)

• Minimum Ventilation Requirements

7. Administrative Requirements

• Air Tightness testing

• 3rd Party Review of Energy Models

• Commissioning Requirements

• Energy Modelling Process Requirements

• Component Modelling for Envelopes

• Schedule “S” for energy model

• Professional sealing of energy models

Range of Targets

The average MURB has a

thermal demand of: 110

Kwh/m2/Yr. (includes: all

passive gains, Heating,

Cooling, Ventilation and Hot

Water.)

• ASHRAE 90.1 Compliant

Envelope,

• High efficiency Boiler,

• Fan-coil units and

• No Heat Recovery.

Enactment Enforcement Options

• A Provincially endorsed process that could be integrated

into Local Government incentive programs (eg:

density/height)

• Potential to be adopted as the code for a given jurisdiction

over time

• Potential harmonization with City of Vancouver

• Potential harmonization with utility incentive programs

Next Steps

• Provincial Working Group on Energy Efficiency meeting now

through 2016 to review recommendations

• More in depth analysis of options in different climate zones

Thank You!

dramslie@integralgroup.com

Dave Ramslie

#psforum15