SUSTAINABLE!PASSIVHAUS�SCHOOL!DESIGNCEFPI Wellington, 19 Feb 2015

Elrond Burrell !Associate, Architype Ltd elrond.burrell@architype.co.uk

We design

Life Enhancing!

Genuinely Sustainable Architecture!

Overview!Time Performance Passivhaus Acoustics Cost Conclusion

Make Time!

2

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

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”

St Luke’s Primary!

21st Century School!

Performance!

‘Standard’ 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?

High 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

Monitoring & Support!

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 performance!

120 kWh

310 kWh

189 kWh

120 kWh

15 kWh

105 kWh

Primary energy Thermal Heating

Measured performance!

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

Measured ‘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

Building fabric U-values of 0.15, windows/doors of 0.8 Airtightness of 0.6 @50 pascals Eliminate thermal bridging

Model the building using PHPP Optimise the orientation, form and fabric Prove thermal energy is below 15 kWh/m2.a Prove primary energy is below 120 kWh/m2.a Confirm within limits of overheating

Undergo the rigorous certification process

Love 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 or off-site ‘allowable solutions’ It encourages integrated design thinking + rigorous discipline It drives simplicity of form, detailing and construction It works! Clients + Users love it!

Optimising the Form!

Oakmeadow Primary School Bushbury Hills Primary School

How deep?!

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

Rational plan!

Ground floor plan: Oakmeadow Primary School

Poetic spaces!

Section: Oakmeadow Primary

Design Out TBs!

Structural slab Lo

ad

Insulation

Insu

latio

n

Structural slab Lo

ad

Insulation

Insu

latio

n

Model + Test!

Structural slab Lo

ad

Insulation

Insu

latio

n

Structural slab Lo

ad

Insulation

Insu

latio

n

Keep Structure In!

…Or Out!

Design In Airtightness!

By simplifying every detail

Optimise SG & Vent’n!

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

Design Quality!

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

Client Outcomes!“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

Delivered 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

Breathe easy!

What about Acoustics?! Good acoustics are important Cellular designs easily comply BUT…

Acoustics! Not all teaching needs to be enclosed Open plan spaces offer different educational and social experiences Open plan spaces can enhance daylight and ventilation

Designing hub spaces! Suitable activities More absorption Better absorption Factor in absorption of cloaks etc.

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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TEACHING AREAS

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COMMUNITY FACILITIES

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KEY STAGE 1

HUB SPACE78.6�

MAIN HALL

Possible Access Hatch

PLANT

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void

CIRCULATION16.7�

FIRST FLOOR

Total Gross Internal Area

44.3 Sq m

How about the cost?!

Comparative Costs! Capita Symonds ‘typical sustainable school’ St Luke’s 2009 BREEAM Excellent Oakmeadow Passivhaus School

£2,151/sqm

£2,080/sqm

£1,780/sqm

Building services costs! Capita Symonds ‘typical sustainable school’ St Luke’s 2009 BREEAM Excellent Oakmeadow Passivhaus School + Reduced M&E = Reduced maintenance costs

£454/sqm

£357/sqm

£323/sqm

Conclusion!

Sustainable Schools!Design elegance = less costs More design time = efficient construction Right standard + evidence based = high performance

This Doesn’t Work!

This Does Work!

Progress?!Base design on the evidence of what actually works

Strive for simplicity of design to deliver more for less

Image: Albert, Righter and Tittman Architects

www.architype.co.uk