Standardised!Passivhaus!Schools

Elrond Burrell, Architype

Be Social #Sustainability #Passivhaus #Timber @ElrondBurrell @TRADA_ @ArchitypeUK @Ecobuild_Now

We design

Life Enhancing!Genuinely Sustainable Architecture

Standardised to bring to or make of an established standard size, weight, quality, strength to compare with or test by a standard to chose or establish a standard for

Why Standardise? To save money To save time To guarantee performance

To Save Money

To Save Money In austere economic times this is surely a good thing? With limited money available standardising means MORE schools can be built BUT…

To Save Money Is reducing capital cost the only issue? Minimising construction cost now, may increase long term or future costs SURELY … we should be looking at whole life costs?

To Save Time

To Save Time To avoid wasting time is surely a good thing? Schools should focus on teaching, not designing new buildings BUT…

To Save Time What about… The education value of pupil and teacher involvement in the design process? The importance of buildings meeting the practical needs and expressing the character of the individual school and community?

To Guarantee Performance

To Guarantee Performance Again – surely a good thing To guarantee energy consumption, internal comfort and user satisfaction BUT…

To Guarantee Performance Do any of the standardised solutions achieve this? – are they even trying? What energy standards are being set? What comfort standards are being set? How are these being delivered? Can they be guaranteed?

Why Standardise? To save money To save time To guarantee performance

To Save Time

To Save MAKE Time

To MAKE Time “The community love their building, they feel it belongs to them, the respect it and care for it” “The layout really works for us, because the architects listened to our ideas and responded to our ethos and practical needs” “The building has helped us move from Satisfactory to Good in our latest Ofsted”

To MAKE Time

2

Engagingly collaborative Elegantly simple Radically ecological Uplifting and enriching Robust and timeless

To Guarantee Performance

To Guarantee Performance Most school buildings do not perform in terms of user comfort Most school buildings use 5+ times as much energy as predicted HOW do we change this?

To Guarantee Performance Monitor buildings and learn from our mistakes Support users in occupying their buildings Avoid tick box compliance processes Set standards + Use techniques that will deliver them

Occupied Days

Unoccupied Days

Baseload

A-Typical Summer Profile Shape

substantial energy use when building is or is nearly empty in

morning

Half-hourly Electrical Demand Profiles

Admin staff arrive at 7:30am, teaching staff arrive between 8 - 8:45

Major electrical use before building is occupied, in both summer and winter (6 cleaners arrive @ 5am)

What is Passivhaus?

What is Passivhaus? Rigorous energy standard Rigorous comfort standard Rigorous quality assurance standard

photovoltaics

solar thermal

Biomass gs heat pump

Heating energy 120 kWh/m2 Primary energy 300+ kWh/m2

Consumption and carbon emissions offset by renewables

0.6 ac @ 50 pascals

Heating energy 15 kWh/m2 Primary energy 120 kWh/m2 0.6 ac @ 50 pascals energy consumption and carbon emissions reduced simply by using less energy!

gas boiler

Passivhaus Standard

120 kWh

310 kWh

189 kWh

120 kWh

15 kWh

105 kWh

Primary energy Thermal Heating

Passivhaus Standard

120 kWh

310 kWh

189 kWh

120 kWh

15 kWh

105 kWh

Passivhaus buildings are performing BETTER than predicted

58 kWh

15 kWh

43 kWh

Primary energy Thermal Heating

Passivhaus Standard

120 kWh

189 kWh

120 kWh

15 kWh

105 kWh

Passivhaus buildings are performing BETTER than predicted

58 kWh

15 kWh

43 kWh

310 kWh

Primary energy Thermal Heating

Achieving Passivhaus? Meet a series of technical standards

o  fabric U-values of 0.15 and windows/doors of 0.8 o  airtightness of 0.6 @50 pascals o  elimination of thermal bridging

Model the building using PHPP o  optimise the orientation, form and fabric o  prove within thermal energy limit of 15 kWh/m2.a o  prove within primary energy limit of 120 kWh/m2.a o  confirm within limits of overheating

Undergo the rigorous certification process

Adopting Passivhaus? It’s based on sound building physics and evidence It’s based on reducing energy by design, instead of offsetting carbon with add-ons It encourages integrated design thinking + rigorous discipline It drives simplicity of form, detailing and construction It works!

Achieving PH Schools

Oakmeadow Primary School Bushbury Hills Primary School

Optimising the Form

Single storey Two storey

14m deep

18m deep

22m deep

22m

dee

p fa

ce E

/W

14m deep

18m deep

22m deep

22m

dee

p fa

ce E

/W

Optimising the Form

Ground floor plan: Oakmeadow Primary School

Optimising the Form

Section: Oakmeadow Primary

Design Out Thermal Bridging

Structural slab Lo

ad

Insulation

Insu

latio

n

Structural slab Lo

ad

Insulation

Insu

latio

n

Model & Test every detail

Design Out Thermal Bridging

Structural slab Lo

ad

Insulation

Insu

latio

n

Structural slab Lo

ad

Insulation

Insu

latio

n

Model & Test every detail

Design Out Thermal Bridging

Keep structure within the thermal envelope

Design Out Thermal Bridging

OR Keep structure outside the thermal envelope

Design In Airtightness

By simplifying every detail

Optimise SG & Ventilation

Simple efficient window arrangement Simple secure night ventilation grilles

Optimise MVHR & Ducts

Fresh air supplied to all main rooms

MVHR

Collaborate

Across the whole team - consultants, specialists, client, contractor, and supply chain

Delivering Design Quality

No compromise of brief, client aspiration, architectural quality or sustainable materials palette

Conclusion

DatePassed by

For the original drawing size

17.06.10Checked by

Scale

Drawn by

N

CheckedByMark

Drawing Originator

Drawing Title

Check this drawing is the latest revision.Do not scale from this drawing.Do not use the information on this drawing without checking all dimensions on site.Do not use any areas indicated for either valuation, purchase, sale or any other form of legally binding contract.Do not reproduce any part of this drawing without prior written consent.

Job No

Notes

6225Drawing No

PL 100Revision

-

Ground & First Floor Plans

Drawing StatusPLANNING SUBMISSION

SC MP -

1:100 A1

Key Plan

Project Title

Swillington Primary School

Contractor Client

Employer

REVISIONS

Date Details

Interserve Project Services Ltd1 Thunderhead Ridge, Glasshoughton, Castleford,West Yorkshire, WF10 4UATel: 01977 522300 Fax: 01977 522301

Architype, Upper Twyford, Hereford, HR2 8ADt 01981 542111 f 01981 542112 e west@architype.co.uk

GROUND FLOOR

Total Gross Internal Area

1427.6 Sq m

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FIRST FLOOR

Total Gross Internal Area

44.3 Sq m

To Guarantee Performance “We feel that our children are more alert and attentive in lessons due to the amount of daylight in classrooms and the fresh air throughout the school. The fact that the new school is built to passivhaus standards means that learning has been enhanced. Our pupils are comfortable, secure and stimulated by their new environment; hence they learn very well!” Sara Morris: Head Teacher, Oak Meadow Primary School

To Guarantee Performance

“Our gas bill was 90% less in the first year of occupying our new building, compared to the old one”

Sara Morris: Head Teacher, Oak Meadow Primary School

To Save Money Capita Symonds ‘typical sustainable school’

£2,151/sqm (M&E £454/sqm) St Luke’s 2009 BREEAM Excellent

£2,080/sqm (M&E £357/sqm) Oakmeadow Passivhaus School

£1,780/sqm (M&E £323/sqm) Standardised Passivhaus School <£1,550/sqm (M&E <£300/sqm)

Why Standardise Schools? To save money?

ü  YES, but focus on SIMPLICITY to achieve better value not just CHEAP

To save time? Ø  NO, if this means negating the value of engagement in

the process

To guarantee performance? ü  YES, by setting PASSIVHAUS as the only evidence

based standard that works

Standardised Passivhaus Basing design on the evidence of what actually works

Striving for simplicity of design to deliver more for less

Image: Albert, Righter and Tittman Architects

www.architype.co.uk