LETI - A Retrospective

Designing Living Systems. LETI – A Retrospective.

Clara Bagenal-George I Associate at Introba & LETI Founder

Introductions

LETI Founder Associate Introba

Andy Stanton Senior Principal, Head of Sustainability UK & Europe, Introba

Adam McTavish

Global Sustainability Director, Currie + Brown

Sustainability Business Partner, Wates Group

Clara Bagenal George

Michela Ravaglia

Agenda

THE STORY OF LETI

ABOUT INTROBA & RELATIONSHIP TO LETI

LETI IMPACT

FUTURE INITIATIVES OF LETI

UPSKILLING & ENGAGEMENT

Who LETI Are

Our story

Introba

Driving change through collaboration and policy

Global Reach

Canada

6 OFFICES

Calgary, Edmonton, Kelowna, Toronto, Vancouver, Victoria 309 people

17 OFFICES

Atlanta, Austin, Chicago, Dallas, Denver, Houston, Indianapolis, Kansas City, Miami, New Haven, New York, Oakland, San Diego, Seattle, St. Louis, Los Angeles, Washington DC

3

Capabilities – 4 practice areas

Buildings

Planning, consulting, engineering, and design.

• Lighting & Daylight Design

• Baggage Handling

• District Energy and Smart Grids

• Fire Engineering

• IT and Audio-Visual Consulting

• Medical Equipment Planning

• Net Zero Carbon

• Renewable Energy

• Security & Resilience

• Systems Commissioning

Analytics Strategy

Translating bold ideas into action.

• Policy and Planning

• Masterplan Visioning

• Climate & Sustainability

• Corporate ESG Strategy

• Circular Economy

• Sustainability Certification &

• Assurance

• Building Health & Wellness

Digital

Connecting the digital to the real.

• Digital Advisory

• Digital Transformation

• Reality Capture

• Digital Twins

• BIM

• Immersive Applications

• Automation & AI

• Smart Buildings, Mobility and Infrastructure

Putting data behind decisions

• Policy & Infrastructure Analysis

• Building Energy Modelling

• Climate Resilience Assessment

• Life Cycle Analysis

• Whole Life Carbon

• Computational Fluid Dynamics

• Data Analytics & Visualization

• Microclimate Assessment

• Building Envelope

Optimization

• Indoor Environmental Quality

LETI’s Continued Impact

Embedded Introba project delivery

Pioneering Research

CIBSE TM65 methodology

DPR WLC case study

LETI Embodied carbon Primer

Refrigerant Best Practice Guide

CIBSE T. Symposium

CANBIM Award

PV WLC study

CIBSE TM65.1

Clark Pacific Study

RICS Global Standard

Greenhill Centre

• Passivhaus ‘classic’ certified

• 81 affordable homes

• Existing trees protected

• 52 new employment opportunities and upskilling workshops for local residents

• 14 apprenticeships and 5 internships paid at London Living Wage

Andy’s LETI Journey

In 2017…. Where LETI Began

A Workshop: May 2017

1. Energy Use Disclosure

2. Better Performance Metrics

3. Decarbonising Energy and Heating

4. Delivery Mechanisms

• Working on local policy recommendations

• Focus on the New London Plan

• Specific to London and Energy Policy

1. Energy Use Disclosure

2. Better Performance Metrics

3. Decarbonising Energy and Heating

4. Delivery Mechanisms

39 organisations and 200 individuals signed up to the LETI energy policy proposals

Policy Implementation

AND WE WERE SUCCESSFUL! LOTS OF THE SUGGESTIONS WERE INCLUDED IN THE LONDON PLAN

– Be Seen –

Energy Use Disclosure

– Calculation of unregulated energy consumption

– Referable scheme to calculate whole life-cycle carbon emissions

– The recognition that that Building Regulations use outdated carbon emission factors

– The heating hierarchy – zero emission and secondary source top

– Inclusion of demand management, minimising peaks and avoiding high energy bills for occupants

But what next? Celebration!

From this point onwards…. Introba fulfilled its promise to transition leadership of LETI to an independent steering group

LETI to publish technical guidance LETI to publish technical guidance

100% of all built new buildings are Zero Carbon

10% of all Designed new buildings are Zero Carbon

100% of all Designed new buildings are Zero Carbon

To work out how we should do this….. Guess what…

ANOTHER WORKSHOP

Net Zero Carbon

- Feed into UKGBC work

Whole Life Carbon

- Guidance on big wins/ idiots guide

- Develop London architypes- Guide to net zero school, resi, office

- Develop a tool for Net zero

- Share knowledge

- Technical guidance, services, refrigerants, decommissioning

Steps for 2019

Data Disclosure

- Define data to be monitored

- Guidance on best practice metering

- SPG guidance on monitoring and reporting

Benchmarking & Methodology

- Developing energy use benchmarks

- Developing predicted energy use methodologies

And we did it!

• Energy targets for homes, schools and offices

• Embodied carbon targets (revised in 2021)

• Documents were downloaded over 100,000 times in the first 2 years, from 100 different countries

Path to zero carbon

Timeline….

From 2020 onwards…

Timeline

LETI has become a verb…

Not forgetting……..

Defining Good

• Operational Energy – New build

• Embodied Carbon – New build

• Retrofit (Homes)

Operational Energy – New build

Defining Good: Operational Energy

One year after the release of the CEDG

Operational energy targets have been met by:

+30,000 homes at masterplan level

+2,500 homes pre-construction

+1,000,000m2 of office space

+250,000m2 of education

Residential

Offices Schools

Climate Emergency Design Guide

Operational Modelling Guide

Operational Energy – Retrofit

Climate Emergency Retrofit Guide

Energy Limits (Modelling method)

Fabric and systems limits (Constituent element method)

Retrofit vs Rebuild Unpicker

Does the whole life carbon assessment and comparison of Retrofit vs Rebuild scenarios provide a basis for decision on the carbon part of the retrofit versus rebuild argument?

Defining Good – Embodied Carbon

Defining Good: Embodied Carbon

One year after the release of the CEDG

Embodied Carbon targets have been met by:

+20,000 homes at masterplan level

+3,500 homes pre-construction

+1,000,000m2 of non-domestic space

A suite of interlinked documents on embodied carbon

Guidance - Jan 2020

Information - May 2021

Targets - May 2021

Whole Life Carbon

So what about Net Zero?

2019: Net Zero Operational Carbon

Ten key requirements for new buildings

2020: Climate emergency design guide and Embodied

Downloaded over 100,000 times

Note: Embodied carbon targets were superseded in 2021

2021: Client Guide for Net Zero Carbon Buildings

2021(Updated in 2023): Carbon definitions in collaboration with WLCN

2022: Net Zero FAQs (with CIBSE)

2022: Net Zero FAQs (with CIBSE)

What and who?

The UK Net Zero Carbon Buildings Standard will enable our industry to robustly verify that our built assets are Net Zero Carbon in line with our nation’s climate targets.

Task Groups

140+ Task Group members

190+

800

3,000

Developing Net Zero Carbon Limits

“Top-down”

“Bottom-up”

Carbon budgets + =

Operational energy performance levels

Embodied carbon performance levels

Net Zero Carbon targets and limits

Overview of Metrics

Operational Energy Limits

Upfront Embodied Carbon (A1-A5) limits

Lifecycle embodied carbon emissions (A1-A5, B1-B5, C1-C4) reporting

Fossil fuel free

Refrigerant & Leakage – limits on GWP

Demand management reporting

Onsite renewables reporting with targets for new builds

Renewable procurement & offsetting

Defining Good

Engagement in Policy / Regulations

Engagement in Policy / Regulations

LETI’s

The Future Homes & Buildings Standards: 2023

Consultation

Comprises of three main parts:

1. The Future Homes and Buildings Standards : 2023 consultation

2. Home Energy Model : Future Homes Standard consultation

3. Home Energy Model Consultation

2023/2024 LETI key messages

1The proposals are not compatible with achieving Net Zero in operation: they do not use EUI as a key metric and do not address the performance gap

Fabric performance should be better than Part L 2021 to reduce energy use and residents' bills

Embodied and Whole Life Carbon should be addressed

Developers should not be allowed to ‘opt-out’ of meeting Part L Regulations

Achieving net zero under these proposals will cost the country more

The consultation is not transparent on decision making and lacks an evidence base

In addition, we believe…

Mechanical ventilation with heat recovery should be incentivised

Smart meters should be compulsory

An energy flexibility metric should be brought in Connection to heat networks that burn fossil fuels should not be encouraged and sleeving should not be supported

More accurate thermal bridging for non-domestic buildings

The new version of CIBSE TM59 should be adopted in Part O

The Written Ministerial Statement is not helpful to industry

Key Actions you can take to support the consultation response

1. Engage in the consultation – If you are time poorLETI have identified 18 key questions you can respond to, to have maximum impact

2. Sign up to the collective letter to the secretary of state

3. If you are a local authority - reach out to your Members

4. Submit additional evidence to DLUHC

5. Share the LETI key messages and encourage others to respond!

The EUI approach is aligned with industry

Local councils are adopting the EUI approach

Upskilling

Future Plans…

2024: Upcoming Plans

More… Embodied Carbon Case Studies

Circular economy

Energy from waste opinion piece

Opinion piece: Time of Use - The missing dimension in Operational Carbon

Retrofit mass housing and non-domestic

Embodied Carbon Primer *Update* Operational energy case studies

Our work on the NZCBS

Future Homes Standard consultation

LETI Pioneers Yearbook

Local Authorities – Policy

Local Authorities - Demolition or retrofit

How does LETI operate?

1 member of staff working 1/1.5 days per week (Lynn Urbanik)

Fundraising

We are funded through crowed funding .. But did not make our 25K target

Organisation Donors

dRMM Ltd

Elliott Wood Partnership Ltd

Etude

Hawkins Brown

Hopkins Architects

Introba

IPUT Real Estate Dublin

Klima-Therm

KJ Tait

Lamorbey Associates

Max Fordham LLP

Michael Laird Architects Limited

Neilcott Construction Ltd

re:sustain limited RSHP

tp bennett

How to help LETI

1. Donate money

2. Donate time – sign up to be involved

3. Use the LETI toolkit to respond to the Future homes consultation

4. Read the LETI guidance and watch the webinars – and promote the resources

Get involved!

www.leti.uk/get-involved

Q&A Thank You