Completed in ear ly 2010, the home joins a

national network of other exemplar homes

open to the public showing how we can cut

cl imate change emiss ions from our exist ing

houses whilst preserving and enhancing our

heritage. It is the f irst superhome in

Hampshire to meet the challenge of s lashing

its emissions by 80%, something al l homes

must achieve if we are to give the world a

chance*. Come along and be inspired by the

ways of saving energy and money in our

homes.

The package of energy saving measures

include vast ly improved thermal insulation

and air t ightness; recyclable ‘A’ energy rated

argon f i l led double glazing with low

emissivity g lass; local ised extract vent i lat ion

with heat recovery; eff ic ient Air Source Heat

Pump for space heat ing combined with low

water volume radiators, wire less control and

ful ly insulated concealed pipe-work;

highly eff ic ient evacuated tube solar thermal

panels; solar photovoltaic panels generating

free and c lean e lectr icity on si te; low energy

l ighting including new style LED’s; energy

consumption and so lar generat ion meters;

‘AAA’ energy rated household appliances and

water saving measures inc luding ultra low

dual f lush WC, aerated shower head, water

meter and rain water harvesting butts.

S o l a r th e r m a l a n d p h o to v o l t a i c p a n e l s

L E D P V m e te r

This house is part of the ‘Old Home Super

Home’ network, an a l l iance of almost 50

homes that have reduced their total

household carbon footprint by at least

60%, more information at

www.superhomes.org.uk inc luding an on

l ine open home booking faci l ity.

NHER energy and carbon modell ing

software was undertaken by consultants

Bri l l iant Futures to verify the modelled

carbon emission reductions. The actual

performance of the home in use is now

being monitored to ascertain the real

savings that can be achieved for

comparison against the original targets.

This data wi l l be periodical ly reviewed

during a minimum period of monitor ing of

36 months while the home remains open to

the public on selected days. The case study

wil l be updated and publ ished at the end of

this period for dissemination.

Sunpower CO2ttage is bel ieved to be the

most energy effic ient ly improved home in

Hampshire to date . The home is owned by

Paul C inig l io an Environmental Sc ientist who

has l ived in the county al l h is l i fe and is an

international pioneer of low carbon new and

retrofit housing. The refurbishment project

costing Paul , >£30,000 was supported by the

South Downs Joint Committee sustainable

development fund. Ful l and current project

detai ls can be found at

www.sunpowerco2ttage.co.uk (site under

development) including a suppl iers page.

Wherever poss ible local suppliers, mater ials

and tradesmen were used.

The project was formally co-opened on 26th

March 2010 by Andrew Lee CEO of the

Sustainable Development Commission &

John Doggart Chair of the SEA.

*Overview of the scale of the UK housing retrofit challenge /

Sunpower CO2ttage project context T he pr o v i s i o n o f he at an d p o w e r t o t he U K ’ s 2 4 m i l l i o n

e x i s t i n g ho m e s i s r e s po ns i b l e fo r o v e r a q uar te r o f a l l

c ar b o n d i ox i de e m i s s i o ns ( 2 7 % ) , th e pr i nc i p a l ga s

as s o c i a te d w i t h t he c a us e o f g l o b a l w ar m i ng . I t i s

e s t i m a te d t ha t as m any a s 8 5 % of the e x i s t i n g ho m e s

w i t h us to day w i l l s t i l l be i n o c c u p at i o n i n 2 0 5 0 . I n 2 0 0 8

the U K G o v e r nm e n t i n t r o d uc e d l e g i s l a t i o n v i a th e C l i m a t e

C ha n ge A c t w h i c h s e ts an e x t r e m e l y c h a l l e n g i n g tar g e t

r e q u i r i ng C O 2 e m i s s i o ns to be r e d uc e d by 8 0 % by th e

y e ar 2 0 5 0 . I n o r de r to a c h i e v e th i s t ar g e t , i n the

do m e s t i c s e c t o r a l o ne , s o m e 5 0 0 , 0 0 0 - 6 0 0 , 0 0 0 h o m e s w i l l

r e q u i r e c o m pl e te w h o l e h o us e e ne r gy r e f ur b i s hm e nt s

e v e r y y e a r un t i l the m i d d l e o f the c e n tur y to he l p av o i d

the c at as t r op h i c e f f e c t s o f g l o b a l w a r m i n g .

Technical specification data: Loft i ns u lat io n was i ncr ea se d f rom 15 0mm to 40 0m m

th ick n es s u s i n g K n uaf ‘Ear thwool ’ ma d e f rom re cyc l ed

g la s s bot t l e s . T h e or ig i n a l e xt er na l wa l l s we re u n-

in s ul at ed so th e cav i t ie s wer e fu l l y f i l l e d wit h b lo wn

mi ne ra l f i br e. T he hom e was a i r p re s su r e te s t ed

be for e an d a f t er t h e r et r of i t wor ks a n d ac hi ev e d an

im prov e d st an da rd twic e as goo d as c ur re nt B u i l d i ng

Reg u lat io ns ; r ecyc la bl e ‘ A ’ e ne rg y ra t ed PV Cu w i nd ow

an d door f ra me s re p lac ed or i g i na l s i n g l e g laz e d

win dows a n d ha ve co nt ro l l ab l e t r ick le v e nt i la t i on

s lo ts . The f ron t door has a n i ns u lat e d core ;

mec ha nic a l v en t i la t io n wi th h ea t r ecove ry i s p rov i d ed

in t h e k i tc he n a nd bat h r oom capt ur i ng 8 4% of the

he at f rom t h e o ut go i n g s ta l e an d h um i d a i r a nd

t ra n sfe rr i ng i t to t he i nc omin g f r e sh a i r con s um i ng

ju st 2 wa tt s in con t i n uo us t r ick le mo de .

An ef f ic i e nt A l t h er ma ‘Da ik in ’ A i r So urc e Hea t Pu mp

for s pac e h eat i ng com b in ed wa s i n sta l l e d to r ep la ce

n i g ht sto ra ge h ea te rs a nd hot w at er imm e rs ion . T h is

he at in g sy st em e xt ract s amb i en t he at f rom t he

out s i d e a i r a n d u pg ra de s i t to t em pe ra tu re s s u i ta bl e

for s pac e h eat i ng a n d ho t wate r u s i n g re f r ig e rat i on

tec h no lo gy . Fo r eac h u ni t o f e l ect r ic i t y co n su me d t he

A SHP i s ca pa bl e o f prov i d in g up to 3 . 5 u n i t s o f us e fu l

he at e ne r gy o r a 350% e f f i c ie ncy .

Al l p i p e-wor k i n t h e lo f t an d w h er e co nc ea l e d w as

in s ul at ed to p r eve n t d ea d le gs w h ich w as te h ea t a nd

wate r . T he h ea t i n g h as a wir e l e ss th e rmos ta t m ea n in g

zone s c an b e te mp er at ur e cont ro l l ed .

Low H2O fa n co i l ra di ato rs by Ja ga w er e u se d as

an a l t er na t i ve to u n de r- f loor he at in g. T h e low

wate r ca pac i t y m ea ns th a t l es s e ne rg y i s us e d for

he at in g. A se r i e s o f h ea t ex ch an g e f i n s com bi n ed

wit h a n u l t ra low en e rg y Dy nam ic Boo st E f fec t

conv ect ion fa n s me an t ha t a f low te mp er at ur e o f

be twe e n 4 0-5 0º prov id e s mor e th an a de q uat e

th er mal comfor t .

A se r i e s o f 12 h ig h ly ef f ic i e nt ev acu at e d t u be s

2 .36 m² in ar ea p rov i d e a s o lar th e rma l pr e hea t to

dom es t ic ho t wa t er p rod uc i n g mo re t ha n 50% of

hot wat er a n nu al ly f r ee o f ch ar ge . A so la r 1 3 .5 m²

pho tovo l ta ic ar ray r at ed at 1 .85 kW p g en e rat e s

f re e a n d c le an e lec tr ic i ty for u s e in t he hom e w it h

su r pl u s so l d bac k to t he g r i d .

Low en er gy l ig ht i ng h as b ee n u se d in c l u di ng n ew

sty l e G U1 0 LED’ s w i th 50,0 00 hou r l i f e a n d

compac t f luo re sc e nt l i g ht in g co ns um i ng a s l i t t l e

as 1 5% of eq u iva le nt Ha lo ge n a n d T un g st en b u lb s

wit h ex t er na l low e ne r gy f i t t i n g s h av i n g day l i g ht

cont ro l s en sor s . ‘AAA’ energy rated household

appl iances, a cu rr e nt cos t e lec tr ic i ty

cons um p t io n me te r an d remot e pow er down

de v ic e s a re u s ed .

Wate r sav in g m ea su r es c ompr i se 2 .6/ 4 l i t re d ua l

f l us h W C, low f low ra t e a era t ed s how er h ea ds b y

EcoCame l a n d Mi ra , n ew wate r rev e n ue me t er an d

ra i n wat er bu tt s . Th e a im is to ach ie ve l e ss t ha n

DEFR A’ s 1 30 l i t r es / p er p er son / da y co ns um pt io n

tar ge t r ep r es e nt in g a 20 % sav i n g on t he r e g io na l

ave ra ge w at er co n s um pt i on i n t he w at er s t r es s ed

Sou t h Ea st r eg io n. O n s i te r ecyc l i n g a n d

compos t i n g a r e a lso op er a te d.

Exemplar carbon saving ‘Superhome’

7 Willowdale Close, Stroud,

nr Petersfield, Hampshire, GU32 3PS.

Saturday 27th

November 2010 – Open house day

Book appointment via

http://www.sustainable-

energyacademy.org.uk/superhomes/petersfield-stroud-

willowdale-close

Sunpower CO2ttage is a privately owned

domestic dwel l ing that has undergone a

systematic whole house energy eff ic ient

retrofit project to bring about an 80%

reduct ion in its overal l carbon dioxide

emissions associated with the home in its

use. The home is a two bedroom mid terraced

property tradit ional ly built in a cottage style

in 1990 in Stroud, a v i l lage in the heart of the

new South Downs National Park, located off

the mains gas network.

South elevation Solar thermal & electric panels