European | UK built environment regulations &

future perspectives

Nearly Zero Energy Buildings

CAN Cymru 2nd Sept 2014

201445 Staff (13 in Wales)

2 Offices (Gloucester,

Llandrindod Wells)38 Projects

2007Welsh Office

1999EU funding for 2 years

to establish asNon-Profit

1997Severn Wye established

2 Staff

http://www.severnwye.org.uk/

Our themes Homes and affordable warmth

Business services Education and training Community Energy Strategy and planning

http://www.severnwye.org.uk/

Our work in Wales

Our projects in Wales

EU directive; Energy Performance Building Directive recast (EPBD) 2010/31/EU

http://www.sustainco.info/cms/uploads/epbdrecast-2010-1-1.pdf

Main changes to original 2002 Directive:

Article 5 Calculation of cost-optimal levels of minimum energy performance requirements

Article 9 Nearly Zero Energy buildings : (a) by 31 December 2020, all new buildings are nearly zero- energy buildings; and (b) after 31 December 2018, new buildings occupied and owned by public authorities are nearly zero-energy buildings

http://www.sustainco.info/cms/uploads/epbdintroduction2011.pdf

Article 5 - Cost Optimal???‘Member States shall calculate cost-optimal levels of minimum energy performance requirements using the comparative methodology framework established in accordance with paragraph 1 and relevant parameters, such as climatic conditions and the practical accessibility of energy infrastructure, and compare the results of this calculation with the minimum energy performance requirements in force.’

Article 5: definitions (2)

Cost OptimisationDomestic RetrofitComparison of current regulations (2010) and cost optimal level

http://www.sustainco.info/cms/uploads/uk-cost-optimal-2013-en.pdf

A9: Nearly Zero Energy Buildings???

‘nearly zero-energy building’ means a building that has a very high energy performance, as determined in accordance with Annex I. The nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby;

Article 2: definitions (2)

EU directives – EPBD recast cont…Other main changes to original 2002 Directive Article 9 (1) National plans for

increasing the number of nearly zero-energy buildings.

http://www.sustainco.info/cms/uploads/united-kingdom.pdf

Welsh Building Regulations… New Part L of the Building

Regulations (31 July 2014) requires reductions in emissions of 8% for new dwellings & 20% for non-domestic buildings.

Review of Code/BREEAM/TAN22 - What could be addressed through planning guidance and/or Building Regulations? [Code is now defunct in England]

TAN22 (Sustainable Buildings) Planning Policy is now defunct

New TAN12 (Design) incorporates TAN22 aspects

Part L 2016 review (Zero Carbon 2016 or/and ‘Allowable Solutions’?)

http://wales.gov.uk/docs/desh/research/140324sustainable-buildings-research-en.pdf

http://wales.gov.uk/docs/desh/publications/140731technical-advice-note-12-en.pdf

On-site LZC tech. or connected heat

Allowable Solutions or next change to Part L Wales

or both?

Zer

o C

arb

on

/Nea

rly

Zer

o E

ner

gy

Allowable Solutions - Zero Carbon/Nearly Zero Energy

Pa

rt L

20

14

Part L 2016?

Allowable Solutions – New build choices: 1. Do it all on site

2. Pay for specific improvements to existing buildings (e.g. retrofit installations), renewable heat or energy schemes  3. Contracting with a third party for them to deliver carbon abatement measures

4. Making a payment to a fund which invests in projects which will deliver carbon abatement on their behalf with a fixed carbon price (per ton)

Further reading…

http://www.zerocarbonhub.org/zero-carbon-policy/allowable-solutions

Further reading…

http://www.sustainco.info/gb/links/

Further reading…

Awaiting Constructing Excellence in Wales own findings…

SustainCo: overview (April 12 – March 15)

Sustainable Energy for Rural Communities, (SustainCo for short), aims to support the ambitious European vision for the energy performance of new buildings: that by end of 2020 they should all be Nearly Zero Energy Buildings (NZEBs).By…

SustainCo: aims1) Increasing the visibility and understanding of the

NZEB philosophy, – ‘Toolkits’ and ‘Advice Line’2) Showcasing ‘Good Practice’ examples3) Capacity building activities for example TODAY!4) Supporting rural projects towards implementation

of energy efficiency and renewable energy 5) Expanding the Covenant of Mayors initiative with a

particular focus on rural regions

9 Partners representing 7 countries:

• Republic of Ireland (x2)• Spain• Austria (x2)• Norway• Croatia• UK

1) toolkits Web-based http://www.sustainco.info/

SustainCo: toolkits cont… Domestic & non-domestic New-build & retrofit +180 toolkits in all

…and advice… +1000 calls to date

0800 500 3076

2) Good Practice Case StudiesOf the five UK case studies: 3 new build / 2 retrofit 4 housing / 1 non-housing 2 social housing / 2 private

housing / 1 public building 1 self-build 1 prefabricated 3 Welsh / 2 English

developments

One the Orchard New build family home Self-built by husband & wife

architects using local labour Very high levels insulation Solar PV, solar thermal,

biomass heating, water harvesting, large areas of glazing, energy monitoring

EPC rated ‘A’ (92) EPC CO2 rated ‘+A’ (104)! 23.6 kWh/m2/yr

The Green House Retrofit family home Design & build by local

architects using local labour Higher levels insulation Solar thermal, biomass (&

mains gas) heating, water harvesting, large south facing glazing

EPC rated ‘B’ (82) EPC CO2 rated ‘B’ (83) 39.4 kWh/m2/yr (estimated)

Glan Gors x4 New build social houses Pre-fabricated (‘volumetric’)

off site & delivered to site by lorry in 4 sections

(Very) airtight and high levelsof insulation

(Very) robust construction details & low thermal bridging

Solar thermal, MVHR system EPC rated ‘B’ (81) EPC CO2 rated ‘B’ (86) 60.2 kWh/m2/yr

Rocks Green 91 new build social houses District biomass heating &

hot water system Higher levels of insulation Robust construction details to

reduce cold bridging Eco-homes rated ‘Excellent’ EPC rated ‘B’ (81) EPC CO2 rated ‘A’ (91) 119 kWh/m2/yr (low ‘carbon’

not necessarily low energy!)

Garwnant Visitor Centre Retrofit & new build public

multi-function centre District biomass heating Higher levels of insulation Low-e lighting Solar PV (pending) High-head hydro (pending) Commercial EPC rated ‘B’

(currently) 159.5 kWh/m2/yr (figure for

whole site not just buildings)

Case studies

EU Partner Case studies (+40)

3) Capacity Building

Over 100 delegates in attendance

4) Supporting New NZEB Development

Photovoltaics calculations reports

Supporting NZEB Rerofit

• Detailed lighting audit & recommendations reports

• Thermal imaging

5) Rural ‘Covenant of Mayors’Support to three communities including Llandovery

Further reading…

Thank you…

We need your feedback please!