PUBLIC BUILDINGS: Is painless retrofitting possible to improve energy efficiency and sustainability in heritage and lis

2. 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 Heritage Andy Shepperd, senior consultant, Arup DimitriHadjidakis, director, Turner & Townsend Project Management Harry Wardill, project advisor, Prince’s Regeneration Trust

3. BASE LEEDS CITY REGION • ENERGY EFFICIENCY • AND • PUBLIC BUILDINGS • Pt 2 of 2 • Giles Proctor

4. 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”

5. developing a methodology

6. Understanding the building

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

8. understanding environmental performance how traditional buildings actually perform rather relying on theoretical models trade-offs between risks and benefits

9. 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

10. establishing existing performance • air pressurisation testing infra-red thermography

11. establishing existing performance • U value testingmonitoring consumption

12. Upgrading to meet requirements

13. 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

14. maintenance and repairsoptimising performance

15. benign enhancement

16. control air infiltration

17. low risk upgrading

18. higher risk upgrading

19. carbon neutral energy supply

20. Upgrading building elementsguidance notes

22. ‘Hearth + Home’ research projects

23. www.english-heritage.org.uk

25. Low Carbon Heritage Refurb Andy Sheppard 11th September 2012

26. The project & team • Carbon reductions in Listed Buildings • Generic guidance document • Five case studies

27. Generic Guidance - Overview • The intended audience: • Planning and conservation officers • Architects • Building owners

28. 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

29. 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

30. Case Studies • Heritage value & Statement of Significance • Building condition survey • Fabric & Systems • Bill analysis & benchmarking • Interventions listing • Options Appraisal • Recommendations

31. Mercer Gallery Elec Gas • Heritage importance within • Windows, doors and interiors • Controls, monitoring and behaviour • Larger scale interventions • Hot water system • Roof insulation (+ wall?) • LED lighting • Photovoltaics? <5 <10 <25 20% 40% 60% 80% 100% !

32. 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 Elec Gas 20% 40% 60% 80% 100%

33. 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 Elec Gas 20% 40% 60% 80% 100%

34. 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 Elec Gas 20% 40% 60% 80% 100%

35. 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 Elec Gas 20% 40% 60% 80% 100%

36. 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

37. Thanks andy.sheppard@arup.com www.yourclimate.org/pages/low-carbon-heritage-buildings

40. The Mayor’s Commitment The Mayor’s Commitment Today 2020 2025 2050 European 20-20-20 Target London Mayor’s Climate Change Target UK Climate Change Act (2008) • Reduction in greenhouse gas emissions by 20% below 1990 levels by 2020 • 20% increase in renewables • 20% cut in energy consumption • Reduction in greenhouse gas emissions by 60% below 1990 levels by 2025 • Reduction in greenhouse gas emissions by 80%below 1990 levels by 2050.

41. The RE:FIT Building Energy Efficiency Programme 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 Insulation Building management technologies An Energy Service Company (ESCO) carries out the works and guarantees the resulting energy savings Cooling equipment This guarantees the payback of the investment with the delivery risk transferred to the ESCO. Low carbon heating RE:FIT allows public bodies to make substantial cost savings, reduce energy bills and the carbon footprint of their buildings

42. Framework of Approved Suppliers • Honeywell • Hurleypalmerflatt • Interserve • Johnson Controls • Schneider Electric • Willmott Dixon • Balfour Beatty • COFELY (GDF SUEZ) • MITIE • EDF Energy • E.ON Sustainable Energy Business • Parkeray/ Hoare Lea New framework of suppliers in place for January 2013 Strong drive to increase national participation

43. 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 • Solar thermal • Photovoltaic panels • Cavity wall insulation • Solid wall insulation • Secondary glazing 1E Nightwatchman software for PC auto shutdown

44. RE:FIT Successes Retrofits completed/near completion on 111buildings including: • Schools • Fire stations • Police buildings • Hospitals • Universities • Cultural Centres • Office buildings £2.1m energy bill savings pa £13.3m investment 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

45. Target 40% of public sector organisations Savings of up to £80m in energy bills Target 600 buildings Savings of up to £12m inenergy bills per annum RE:FIT Pipeline 2012 2015 2025 Pipeline of 325 buildings Savings of over £7m p.a.in energy bills £35m investment

46. ELENA Funding • 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 The PDU has to leverage its cost 25 times in investment

47. The Programme Delivery Unit Team Virginie Caujolle-Pradenc GLA Programme Manager Dimitri Hadjidakis Programme Director Chloe DeBanks-Hirst Simon Hart Programme Office Tristan Oliver Technical Lead Jon Spring Financial & Commercial Robert McKinnon Marketing & Engagement David Mathieson Procurement David Rees Rob Edwards David Crewe Paul Maitland John McGowan David Walker + + RommyPerea Chris Spicer Merv Chapman Phil Toombs Chloe DeBanks -Hirst David Muggeridge Elliot Smith + +

48. The role of the Programme Delivery Unit • Provided by Turner & Townsendwith 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

49. RE:FIT Summary • 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

50. E-mail:REFIT@london.gov.uk Or contact Dimitri Hadjidakis Turner & Townsend 020 7544 4110 Virginie Caujolle-Pradenc Greater London Authority 020 7983 4239