Steel Farm - Construction21

Etu d e d e ca s : S te e l Fa r m
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Steel Farm
PUBLIÉ PAR SIDDALL | 25 AVRIL 16
Type de pro jet : Co nstructio n Neuve
Type de bâtiment : Maiso n individuelle
iso lée o u jumelée
Année de co nstructio n : 20 13
Zo ne climatique : [Cfc] Océanique hiver &
été frais. Tempéré sans saiso n sèche.
Surface nette : 151 m 2 SHON
Co ût de co nstructio n : 1 56 7 €
No mbre d'unités fo nctio nnelles : 1
Lo gement
Co ût/m² : 10 €/m 2
Co ût/Lo gement : 1 56 7 €/Lo gement
, NE47 8 JP Whitfield, United Kingdo m
// Description
Steel Farm is lo cated near Hexham in the No rth Pennine Area o f Outstanding Natural Beauty (ANOB). Built using traditio nal
co nstructio n techno lo gy it is the first Certified Passivhaus in No rthumberland.
As o rganic farmers they o wned a plo t o f land where they dreamt o f building a co mfo rtable, lo w energy ho me that co uld
acco mmo date them in their o ld age and minimise their impact upo n the enviro nment. They lo nged to build their o wn
sustainable lo w energy ho me so that family co uld co me and stay. (In the winter o f 20 11 Trevo r and Judith Go spel were renting
a small, glo o my bo thy. That bitterly co ld winter they fo und that the inside o f their fridge was warmer than the living ro o m.)
The remo te rural lo catio n, limited access to utility mains, and o nero us planning restrictio ns incurred significant co sts and
stro ngly influenced design. A number o f co nditio ns impo sed by the lo cal planning department increased co sts and nearly
prevented the Go spel’s fro m building their dream ho me. The ho use features a so lar thermal system fo r do mestic ho t water
and a reed bed system fo r the treatment o f fo ul waste water. AECB Water Standards info rmed the design also .
Delicate nego tiatio ns were undertaken to demo nstrate the value that the pro ject had to o ffer the lo cal and regio nal eco no my,
and the enviro nment. They also saw the remo val o f a requirement to pro vide tabling and two chimneys. Ultimately all o f these
criteria were fulfilled witho ut co mpro mising the client’s desire to achieve the Passivhaus standards o f perfo rmance.
Planning permissio n was received in September 20 11. Co nstructio n co mmenced in June 20 12 and was co mpleted in
February 20 13.
Trevo r and Judith no w live in their spacio us new, ho me. The walls are washed with natural daylight and the windo ws frame
views o f the ro lling hills (allo wing surveillance o f the livesto ck). The lights are rarely used.
A three part do cumentary series abo ut the pro ject is available at www.PassivhausSecrets.co .uk
Plus de dé t ails sur ce pro je t :
http://www.PassivhausSecrets.co .uk
Fiabilit é de s do nné e s :
Certifié tierce partie
// Intervenants
Architecte
No m : LEAP
Mark Siddall
Site Web : http://www.leap4.it
Actio n : Architect and Passivhaus Designer
Mo de co nt ract ue l :
Co ntractant général
Dé m arche dé ve lo ppe m e nt durable du m aît re d'o uvrage :
are custo dians o f the land.
As farmers Trevo r and Judith Go spel reco gnise that they
The ro lling landscape o f No rthumberland is a jewel in the cro wn o f the No rth East. Just as a precio us sto ne co mpliments the
band o f a ring they wanted their ho me to co mpliment an Area o f Outstanding Natural Beauty.
They wanted the patina o f time to enrich their ho me and the character o f the ho use to develo p o ver decades. Its purpo se being
to respo nd to , enrich and evo ke a sense o f place.
Yet they did no t want a traditio nal ho use. No r did they want a ho me that was alien to its setting. They wanted a characterful
ho me that is harmo nio us yet distinctive, memo rable, unique and meaningful.
Steel Farm co mes fro m the earth. The sun kissed walls are natural sto ne drawn fro m the quarry nearest to the site. The ro o f is
Cumbrian slate. Details beguilingly appear to echo traditio nal design, yet in practice radically reinterpret the past.
Inside the ho use daylight washes the interio r as the windo ws are po sitio ned, sized and pro po rtio ned to carefully frame views
acro ss the land and to ward the fields where sheep ro am freely beneath dramatic skies.
De script io n archit e ct urale : Steel Farm is lo cated near Hexham in the No rth Pennine Area o f Outstanding Natural Beauty
(ANOB). Built using traditio nal co nstructio n techno lo gy it is the first Certified Passivhaus in No rthumberland.
As o rganic farmers they o wned a plo t o f land where they dreamt o f building a co mfo rtable, lo w energy ho me that co uld
acco mmo date them in their o ld age and minimise their impact upo n the enviro nment. They lo nged to build their o wn
sustainable lo w energy ho me so that family co uld co me and stay. (In the winter o f 20 11 Trevo r and Judith Go spel were renting
a small, glo o my bo thy. That bitterly co ld winter they fo und that the inside o f their fridge was warmer than the living ro o m.)
The remo te rural lo catio n, limited access to utility mains, and o nero us planning restrictio ns incurred significant co sts and
stro ngly influenced design. A number o f co nditio ns impo sed by the lo cal planning department increased co sts and nearly
prevented the Go spel’s fro m building their dream ho me. The ho use features a so lar thermal system fo r do mestic ho t water
and a reed bed system fo r the treatment o f fo ul waste water. AECB Water Standards info rmed the design also .
Delicate nego tiatio ns were undertaken to demo nstrate the value that the pro ject had to o ffer the lo cal and regio nal eco no my,
and the enviro nment. They also saw the remo val o f a requirement to pro vide tabling and two chimneys. Ultimately all o f these
criteria were fulfilled witho ut co mpro mising the client’s desire to achieve the Passivhaus standards o f perfo rmance.
Planning permissio n was received in September 20 11. Co nstructio n co mmenced in June 20 12 and was co mpleted in
February 20 13.
Trevo r and Judith no w live in their spacio us new, ho me. The walls are washed with natural daylight and the windo ws frame
views o f the ro lling hills (allo wing surveillance o f the livesto ck). The lights are rarely used.
Et si c'é t ait à re f aire ? :
Definitely train the site trades befo re starting o n site. We did and risk was reduced significantly.
Opinio n de s o ccupant s : Trevo r Go spel "The co nstructio n o f o ur new ho me has been a real adventure; challenging at
times but, all in all, well wo rth the wait. Bo th Mark and Jo e have met and exceeded o ur expectatio ns. We had a limited budget
and stuck to it. I do n't think that we co uld have been in safer hands."
Judith Go spel “In o ur o ld acco mmo datio n, a winter o r two ago , 20 11 I think, we measured the temperature o f the fridge and the
living ro o m. At o ne po int it was warmer in the fridge! Mo re than the savings in the energy bills and the reduced enviro nmental
impact, we are enjo ying the co mfo rt o f o ur new ho me."
// Energie
Consommation énergétique
Be so in e n é ne rgie prim aire :
8 5,0 0 kWh PE/m 2 /year
Be so in e n é ne rgie prim aire bât im e nt st andard : 220 ,0 0 kWh PE/m 2 /year
Mé t ho de de calcul : Autre
CEEB : 0 ,0 9 kWh PE / €
Ré part it io n de la co nso m m at io n é ne rgé t ique : Space Heating Demand 14 kWh/m2.yr
DHW 35 kWh/m2.yr
Plus d'inf o rm at io n sur la co nso m m at io n ré e lle e t le s pe rf o rm ance s : The precise amo unt o f electrical energy
used by the ho use can no t be determined because the electric meter is used fo r the who le farm.
Performance énergétique de l'enveloppe
Opinio n de s ut ilisat e urs sur le s syst è m e s do m o t ique s :
fitted with thermo static valves.
A digital pro grammable ro o m stat is used. Radiato rs are
In practice the digital pro grammable ro o m stat has pro ven to be mo re co mplex that was desirable.
As the dwelling is a Passivhaus, and space heating demand is already minimised, co ntro lled can be simplified even further.
In future a simple seaso nal On-Off switch will be used (On fro m September, Off fro m March).
UBat de l\'e nve lo ppe : 0 ,10 W.m -2 .K-1
Plus d'inf o rm at io n sur l'e nve lo ppe : Wall0 .1 W/m2K
Ro o f0 .0 8 W/m2K
Flo o r0 .11 W/m2K
Windo ws (uninstalled)0 .76
Windo w g-value0 .5
Co e f f icie nt de co m pacit é du bât im e nt : 3,20
Indicat e ur : DIN EN 138 29 - n50 » (en 1/h-1) (I4) m 3 /H.m 2 n50 (Vo l/H) Q4
Et anché it é à l'air : 0 ,32
Co nso m m at io n ré e lle (é ne rgie f inale ) :
Co nso m m at io n ré e lle (é ne rgie f inale ) /m 2:
24 Co nso m m at io n ré e lle (é ne rgie f inale )/unit é f o nct io nne lle :
36 49
(20 14)
// EnR & systèmes
Systèmes
So lut io ns am é lio rant le s gains passif s e n é ne rgie :
Internal gains minimised.
Chauf f age :
Chaufferie gaz à co ndensatio n
So lar gains o ptimised and balanced against o verheating risks.
ECS :
Chaufferie gaz à co ndensatio n
So laire thermique
Raf raîchisse m e nt :
Aucun système de climatisatio n
Ve nt ilat io n :
Do uble flux avec échangeur thermique
Ene rgie s re no uve lable s :
So laire thermique
Pro duct io n d'é ne rgie re no uve lable :
40 ,0 0 %
Bâtiment intelligent
GT C :
Co mplexity avo ided. Simple co ntro ls used where po ssible.
// Environnement
Emissions de GES
Em issio ns de GES e n phase d'usage : 15,70 KgCO 2 /m 2 /year
Mé t ho do lo gie : PHPP calculatio ns used to estimate energy use and carbo n emissio ns
Duré e de vie du bât im e nt (anné e ) : 10 0 ,0 0 year(s)
Eau et qualité de l'air intérieur, santé et confort
Fact e ur lum iè re nat ure lle : Average fo r Living Ro o m / Dining / Kitchen 3.6 8 %, Ho me Office 7.0 5%, Bedro o ms > 1.0 9 %
Co nf o rt aco ust ique : No ise levels fro m MVHR designed to be < 25 dB(A) in habitable ro o ms and < 35 dB(A) in no nhabitable ro o ms
Co nf o rt t he rm ique m e suré : Refer to Health & Co mfo rt abo ve.
Co nf o rt t he rm ique calculé : 20 C during winter. 0 % >25C during summer.
Co nce nt rat io ns sim ulé e de CO2 e n int é rie ur : Calculated ho useho ld average <10 0 0 ppm
Co nf o rt & sant é : Measured Perfo rmance:
Average temperature o ver the Year 20 .3C
Winter:
o Average Who le Ho use Internal Temperature 18 .5C
o Average External Temperature 5C
Summer:
o Average Maximum Internal Temperature 23C, Average Maximum External Temperature 15C,
o Average Maximum Internal Temperature 24.7C, Average Maximum External Temperature 23C
Qualit é de l'air int é rie ur : Hygienic ventilatio n (0 .3 - 0 .4 air changes per ho ur).
30 m3.h/perso n
Rainwater butts used externally.
AECB Water Efficiency Standards were ado pted as the basis fo r minimising mains water, do mestic ho t water demand and
o verheating risks.
Lo w flo w fittings, a co mpact services plan, a micro bo re plumbing system was utilised so as to minimise the vo lume o f dead
legs (< 1.0 litres), and the sto rage cylinder was superinsulated (10 0 mm co mpared to standard 50 mm.)
Co nso m m at io n annue lle d'e aux grise s re cyclé e s : 0 m 3
Co nso m m at io n annue lle d'e au de pluie ré cupé ré e : 0 m 3
// Produits
Paul Novus MVHR (supplied by Green Building Store)
Fabricant : PAUL
Co nt act f abricant : Green Building Sto re
Sit e Int e rne t f abricant : http://greenbuildingsto re.co .uk/
Cat é go rie de pro duit : Génie climatique, électricité / Ventilatio n, rafraîchissement
De script io n:
mechanical ventilatio n with heat reco very
Co m m e nt aire s:
Passivhaus Certified
// Coûts
Co ût de co nstructio n : 1 56 7 €
Coûts de construction & exploitation
Aide s f inanciè re s : 0 €
Co ût t o t al : 30 7 350 ,0 0 €
Facture énergétique
Co ût é ne rgé t ique ré e l :
36 7,0 0 €/Lo gement
co ût é ne rgé t ique ré e l / m ² : 2,43 € / m 2
Fact ure é ne rgé t ique pré visio nne lle / an :
36 7,0 0 €
// Environnement urbain
Enviro nne m e nt urbain : Rural lo catio n. As an o pperatio nal farm ho use the dwelling is accessed by car. Public transpo rt is
no t available. The site is lo cated near Hexham, No rthumberland. No rth East England.
Surf ace du t e rrain :
1250 m 2
Surf ace au so l co nst ruit e :
Parking :
15 %
1 car used
// Qualité environnementale du bâti
Qualit é e nviro nne m e nt ale du bât i :
Santé, qualité air intérieur
aco ustique
co nfo rt (o lfactif, thermique, visuel)
efficacité énergétique, gestio n de l\'énergie
pro cédés de co nstructio n
// Concours
Abo ut t he Passivhaus St andard:
The term “PassivHaus” refers to a specific building co nstructio n standard with excellent co mfo rt co nditio ns during summer
and winter. Such buildings reduce space heating by 9 0 % and to tal energy co nsumptio n by 75-8 0 % co mpared to UK Building
Regulatio ns and achieve a co mparable reductio n in carbo n emissio ns. The Passivhaus Standard was develo ped in the early
19 9 0 ’s by Pro fesso r Wo lfgang Feist and Pro fesso r Bo Adamso n and then launched in 19 9 6 .
The Passivhaus Standard, the wo rlds leading quality assurance standard fo r lo w energy building, is o ver 20 years o ld and
there are no w repo rted to be mo re than 50 ,0 0 0 Passivhaus buildings glo bally – including ho uses, apartments, scho o ls,
o ffices, spo rts halls and gymnasiums, sheltered acco mmo datio n and care ho mes, ho spitals and medical centres.
The exemplary perfo rmance o f Passivhaus Standard has been do cumented extensively thro ugh o ngo ing scientific research. In
parallel research has revealed that there is a significant gap between the theo retical perfo rmance o f sustainable lo w energy
dwellings and the actual delivered perfo rmance. This o ften means carbo n emissio ns savings are no t being delivered in
practice. Recent papers, including a paper prepared by the architet o f Steel Farm (http://www.mdpi.co m/20 71-10 50 /8 /1/9 7/pdf),
demo nstrate that ho uses build to the Passivhaus Standard are capable o f clo sing the perfo rmance gap.
Even mo re abo ut info rmatio n abo ut the perfo rmance gap and ho w it may be clo sed can be fo und at
www.BuildingPerfo rmanceEvaluatio n.co .uk