PUBLIC BUILDINGS: Is painless retrofitting possible to improve energy efficiency and sustainability in heritage and listed buildings?

Jonathan Riley, partner, Pinsent Masons (chair)Giles Proctor, historic buildings architect for North Yorkshire and heritage at risk adviser, English HeritageAndy Shepperd, senior consultant, ArupDimitri Hadjidakis, director, Turner & Townsend Project ManagementHarry Wardill, project advisor, Prince’s Regeneration Trust

BASE LEEDS CITY REGION

ENERGY EFFICIENCYAND

PUBLIC BUILDINGS Pt 2 of 2

Giles Proctor

first EH guidance on energy efficiency published 2002

(revised 2004, with new guidance in 2011)

“The guidance given by English Heritage should be taken into account in determining appropriate energy performance standards for building work in historic buildings”

developing a methodology

Understanding the building

understandingsignificance

understanding the point at which character and significance would be unacceptably compromised by compliance with the energy efficiency requirements

understandingenvironmental performance

how traditional buildings actually perform rather relying on theoretical models

trade-offs between risks and benefits

understandingenvironmental performance

The larger scale- the performance of the building as a whole- heating ventilation, insulation energy efficiency

The medium scale- how conditions vary from place to place around the building

The smaller scale- can be difficult sometimes to make satisfactory junctions between various elements and construction details with different types and levels of insulation

establishing existing performance

air pressurisation testing infra-red thermography

establishing existing performance

U value testing monitoring consumption

Upgrading to meet requirements

upgrading to meet requirements

Establish priorities:

• Degree of impact on the historic fabric• Amount of benefit and payback period• Ease of installation• Technical risks• PHASED APPROACH/incorporation into

programmes of repair

maintenance and repairsoptimising performance

benign enhancement

control air infiltration

low risk upgrading

higher risk upgrading

carbon neutral energy supply

Upgrading building elementsguidance notes

‘Hearth + Home’research projects

www.english-heritage.org.uk

Andy Sheppard11th September 2012

Low Carbon Heritage Refurb

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The project & team

Carbon reductions in Listed Buildings Generic guidance document Five case studies

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Generic Guidance - Overview

The intended audience: Planning and conservation officers Architects Building owners

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Generic Guidance – Investigate

Bill analysis – basic but essential Benchmarking can be challenging Sub-metering very useful Range of supplementary tests possible

Thermal imaging Air pressurisation In-situ U-value Thermal modelling

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Generic Guidance – Intervention

Think about the building as a whole Energy hierarchy

Apply with pragmatism Behaviour – has to be the first change Fabric – possible with care Services – more freedom Low carbon – perfectly feasible

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Case Studies

Heritage value & Statement of Significance Building condition survey

Fabric & Systems Bill analysis & benchmarking Interventions listing Options Appraisal Recommendations

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Mercer Gallery Heritage importance within

Windows, doors and interiors Controls, monitoring and behaviour Larger scale interventions

Hot water system Roof insulation (+ wall?) LED lighting Photovoltaics?

20% 40% 60% 80% 100%

!Elec

Gas

<5 <10 <25

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St. Peters Street Heritage importance within

Some windows, panelled reveals, roof spaces Unsure future use – calculations difficult Larger scale interventions

Loft insulation (with care) Lighting controls Draught stripping Internal wall insulation feasible (esp. if hostel) High performance secondary glazing

20% 40% 60% 80% 100%

Elec

Gas

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Armley Mills Heritage importance within

Pretty much everything! Monitoring, controls Larger scale interventions

Boiler system modernisation Digital plant controls Partial roof insulation Daylight linking in lights

20% 40% 60% 80% 100%

Elec

Gas

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Almondbury Dwelling Heritage importance within

Exterior walls and roof, some interior Recently upgraded Larger scale interventions

Tailor to occupant Draught-stripping Low energy lighting Loft insulation Wall, floor insulation feasible

20% 40% 60% 80% 100%

Elec

Gas

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Lord Deramore’s School Heritage importance within

Exterior walls and roof, some interior Emissions 86% heating Larger scale interventions

Roof and wall insulation were poss. Upgrade boiler system & controls Secondary glazing Photovoltaics

20% 40% 60% 80% 100%

Elec

Gas

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Summary

Heritage Assets are significant and worth saving More difficult than ‘normal’ existing buildings But...

The process is no more difficult than usual Start with the basics – they sometimes yield surprising results With care, larger interventions can be identified Significant savings are possible

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Thanks

andy.sheppard@arup.com

www.yourclimate.org/pages/low-carbon-heritage-buildings

The Mayor’s CommitmentLondon Mayor’s Climate Change Target

Today 2020 2025 2050

• Reduction in greenhouse gas emissions by 60% below 1990 levels by 2025

UK Climate Change Act (2008)

• Reduction in greenhouse gas emissions by 80% below 1990 levels by 2050.

European 20-20-20 Target

• Reduction in greenhouse gas emissions by 20% below 1990 levels by 2020

• 20% increase in renewables • 20% cut in energy

consumption

The Mayor’s Commitment

An Energy Service Company (ESCO) carries out the works and guarantees the resulting energy savings

This guarantees the payback of the investment with the delivery risk transferred to the ESCO.

Insulation Building management technologies

Cooling equipmentLow carbon heating

Energy Performance Contracting approach: The public sector building owner identifies a portfolio of buildings to retrofit, sets a target percentage energy savings and a payback period

The RE:FIT Building Energy Efficiency Programme

RE:FIT allows public bodies to make substantial cost savings, reduce energy bills and the carbon footprint of their buildings

• Balfour Beatty• COFELY (GDF SUEZ)• MITIE• EDF Energy• E.ON Sustainable Energy Business• Parkeray/ Hoare Lea

• Honeywell• Hurleypalmerflatt• Interserve• Johnson Controls• Schneider Electric• Willmott Dixon

Framework of Approved Suppliers

New framework of suppliers in place for January 2013Strong drive to increase national participation

• Solar thermal• Photovoltaic panels• Cavity wall insulation• Solid wall insulation

• Secondary glazing1E Nightwatchman software for PC auto shutdown

Energy Conservation Measures

• District Heating• CHP• VSDs on pumps and fans• PC control• Voltage optimisation• Lighting & controls• BMS controls• Heat recovery

• Loft insulation• Insulation to pipework

• Draught proofing• Radiator reflector panels

RE:FIT Successes

• Hospitals• Universities• Cultural Centres• Office buildings

Retrofits completed/near completion on 111 buildings including:• Schools• Fire stations• Police buildings

Memoranda of Understanding signed by 54 London organisations including:

• 21 of the 33 London Boroughs• 16 NHS organisations• 17 other organisations including Central Government, Museums &

Education

£2.1m energy bill savings pa

£13.3m investment

Target 600 buildings

Savings of up to £12m in energy bills per annum

Pipeline of 325 buildings

Savings of over £7m p.a. in energy bills

£35m investment

Target 40% of public sector

organisations

Savings of up to £80m in

energy bills

2012 2015 2025

RE:FIT Pipeline

• The GLA secured funding from the European Commission under the European Local ENergy Assistance Programme

• ELENA funds the Programme Delivery Unit (PDU) to further drive take up of the RE:FIT programme over 3 years

• 90% of the £2,671,000 funding is provided by ELENA and 10% by the GLA

ELENA Funding

The PDU has to leverage its cost 25 times in investment

The Programme Delivery Unit Team

Dimitri HadjidakisProgramme Director

Robert McKinnonMarketing & Engagement

Jon SpringFinancial & Commercial

Tristan OliverTechnical Lead

David MathiesonProcurement

Chloe DeBanks-HirstSimon Hart

Programme Office

Merv ChapmanPhil Toombs

Chloe DeBanks -HirstDavid Muggeridge

Elliot Smith++

David ReesRob EdwardsDavid Crewe Paul Maitland

John McGowanDavid Walker

++

Rommy PereaChris Spicer

Virginie Caujolle-PradencGLA Programme Manager

The role of the Programme Delivery Unit

• Provided by Turner & Townsend with support by PA Consulting• Manages the RE:FIT framework• Facilitates the uptake by (London-based) Public Sector organisations• Supports clients through all programme stages• Uses experience and lessons learnt to develop best practice templates and

standards

The GLA has committed to save approximately 100,000 tonnes of CO2 over 3 years through the PDU

• Significant Mayoral support

• Savings are guaranteed

• Barriers of alternative procurement routes removed

• A tested, readily accessible and constantly updated and improved approach

• Funded experienced PDU

• “Difficult” buildings not an issue

RE:FIT Summary

Dimitri HadjidakisTurner & Townsend

020 7544 4110

Virginie Caujolle-PradencGreater London Authority

020 7983 4239

E-mail: REFIT@london.gov.uk

Or contact

Sustainable Heritage-Led Regeneration

Harry Wardill

Middleport Pottery

• In June 2011, The Prince’s Regeneration Trust acquired the Middleport Pottery site to save it from closure and to embark on an ambitious and sustainable conservation and regeneration project.

• The project will save a nationally important piece of heritage while supporting and working with the people of Burslem and beyond.

• The 84,000 sq ft site will be developed into a community and enterprise hub that supports the local community and economy.

• Denby Holdings Ltd own the pottery business itself (Burgess and Leigh) and they will be the chief tenants at the Middleport Pottery site

…the last working Victorian pottery in the UK

Critical Success FactorsConservation- Preserve the unique character of the listed buildings - Care for the collection of moulds, artefacts and archives

‘Mending the Factory’- Deliver optimal working area for the Burleigh Pottery

New Facilities- Establish sustainable visitor facilities (inc. shop/café)- Create space for craft based businesses

Regeneration- Maximise regeneration impact (jobs, growth, participation)- Sustain high levels of community support

Environment- Bring an underused resource back into full use and improve its environmental performance where possible

Conservation Philosophy

Environmental• Building at risk repaired and

embodied carbon ‘reused’• Retention of robust, long-lasting

and flexible building fabric and layout

• Solid wall construction with good thermal mass

• Double aspect rooms with natural cross ventilation

• Good natural light levels with large existing windows and roof lights

• Light touch repairs – works only where necessary

• Thermal upgrades undertaken where practical e.g. roofs

• Installation of efficient gas powered central heating system

• Local sub-contractors used for the works where possible

• Traditional materials used where possible

• Green Travel Plan developed for future building users

Wider Burslem• Port Street houses developed

by the Council• Harper Street Houses used as

an exemplar for ‘homesteading’• Wedgewood Institute

• Wider Townscape Heritage Initiative

• Focus on the canal infrastructure

• Investment in other growing local pottery businesses

• Part of the wider place making work of the Prince’s Charities

• Stoke-on-Trent is the 16th most deprived local authority in the UK (10th for jobs; 7th for education)

• Fifty local jobs at the Middleport Pottery have been saved• Production of Burleigh ware has and will continue to grow – more jobs will

be created as the business flourishes• New workshop units for creative industries will be created for new and

expanding business in Burslem and the wider area. This will create further jobs.

• Visitor numbers will be increased from 8,000 per annum to 30,000. This will bolster the local economy and create further jobs

Regeneration

Completed Heritage-Led Regeneration Projects

Harvey’s Foundry, Hayle

• At one time 80% of the world's steam pumping engines were produced in Hayle. When the area suffered wide industrial decline, the Foundry was left redundant.

• The site has been developed to create rentable office space, craft workshops, art studios and live work units

• Phase III will create more work space and a heritage information centre

Harvey’s Foundry Successes (phases I and II)• Restoration of the Grade II* listed Drawing Office and Grade II

listed Foundry Farm buildings • Construction of 8000sq ft of new enabling development at Dowren

House, accommodating 51 new jobs and providing income for Hayle Town Trust.

• In total 78,931 sq ft of historic building space has been regenerated. With 112 people employed on site, over £3 million was raised for the exchequer through income tax and NI, between 2003 and 2010- in less than 9 years Harvey’s will have generated more than it cost.

• PRT estimates that 860 metric tonnes of CO2 was saved through the reuse of these buildings, rather than building new

Completed Heritage-Led Regeneration Projects

Sowerby Bridge Wharf, West Yorkshire

• Collection of 18th and 19th century canal buildings that sit at the head of the Calder and Hebble Navigation and adjoining Rochdale Canal.

• Main buildings on site are four stone-built, C18th warehouses, one Grade II*, the rest Grade II. There are also ancillary buildings from the C18th

• Renovated to create mixed-use space that incorporates offices, workshops, a canal boat wet-dock and a restaurant.

Sowerby Bridge’s Successes• £2.7 million of public investment by 2007, in addition to an

undisclosed sum by British Waterways. • £1.16 million of private investment, much of it from local

businesses. • 34,200 sq ft of vacant heritage building floorspace brought

back into use• 270 employees on site, 17 business units, 7 start-ups• £1,631,934 a year in additional NI and income tax (2007 – 10)• By January 2010, and despite the recession, unemployment in

Sowerby Bridge had dropped from 10% to 5.6%.• The local authority estimates it has seen a further £28m

investment in the local area since the restoration, creating a further 350 jobs

• PRT estimates that 373 metric tonnes of CO2 was saved through the reuse of these buildings, rather than building new