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15.06.10 dlg to iema the aesthetics of passivhaus
- 1. Seminar for IEMA, Leeds Aesthetics of Passivhaus From an architects perspective
- 2. Introduction Please feel free to ask questions • A bit about me • Passivhaus aesthetic perspective • Influencing Factors • Planning – perceptions & challenges • Conclusion Passivhaus is often described as boxy and boring. From an architect’s perspective Neil will be elaborating on some of the aesthetic issues to consider when designing a Passivhaus some of which require a greater understanding from planners and the general public
- 3. • Associate director at DLG architects • Always had an interest in low energy design - 1995 was only UK winner in an international Bioclimatic dwelling competition (completed 2010) • 2010-2014 Have designed 2 buildings using Passivhaus Planning package • Dec 2014 a qualified certified Passivhaus designer after 2 week intense course run by the AECB A bit about me Swift Passivhaus Mark I, HarrogateNeil Swift designed Bioclimatic dwelling, Tenerife
- 4. • At DLG architects we are hopeful of having our first certified project soon • More likely to come from a private / end user client rather than the commercial sector • We have seen some changes with Leading commercial clients such as M&S and one would hope they will come into the passivhaus fold in the near future • Until then where possible we design using passivhaus principles A bit about me M&S, HarrogateAshville College, Harrogate
- 5. • Trial & error development • Hard won fuel • Orientation mattered • Larger windows South Passivhaus Aesthetic perspective C20th suburban housingC17th Nidderdale farm house Traditional aesthetic • Any shape goes • freely available fuel • Orientation didn’t matter • Windows any size C18th C20th
- 6. Passivhaus Aesthetic perspective Tower block Vaxjo, Sweden • Think inside Box dogma • uninspiring Early passivhaus aesthetic Early Passivhaus 2000 , Brandenburg, architect Büro aDREI
- 7. Aesthetic informed by science • Rooted in German technical know how and science • The Porsche of building energy efficiency and comfort • Historically not necessarily as good as Porche aesthetics! Passivhaus Aesthetic perspective
- 8. • Form • Orientation & Fenestration • Window design • Detail design Influencing factors
- 9. Form Influencing factors • Not exactly passive but who designed it?
- 10. Aedas Leeds Calls scheme for Citu 2010 – based on passivhaus principles Form Influencing factors
- 11. Corridor houses Iceland • Form Heat loss factor = Heat loss area / Treated Floor area Emperor Penguin huddle Form Influencing factors
- 12. Passivhaus office Esberg Denmark Form Influencing factors
- 13. “If the edge fails then the space never becomes lively“ Christopher Alexander • Think “outside the box” not just “inside the box” Form Influencing factors
- 14. • Pitched roof outside of thermal envelope flat roof adds relief • Projections or insets minimise surface area • Veranda's Influencing factors Form Proctor Mathews, Hanam hall, Bristol Graham Bizley, Dundon Passivhaus, Somerset
- 15. Influencing factors Form • Rooms outside • Entrance canopy. Kimmo Lylykangas Architects Architektur werkstatt vallentin house in puchheim
- 16. • Orientate on site to maximise heat gain ideal 30 degree due South • South orientation Easy to control gains • West & East hard to control prone to overheating • Deeper window reveals generally Influencing factors Orientation & fenestration De Vries House, Fullford, York Swift Passivhaus MKII, Harrogate Image c/o Quantum builders
- 17. • Glazing sized for minimum daylight • Low use, low light room types best Influencing factors Orientation & fenestration North elevation aesthetic Pius Platz, Munich, Architects Allmann Sattler Wappner
- 18. • 25-35% glazing for South facing facades without overheating risk • Glazing maximised for winter heat so shading important to minimise summer overheating South elevation aesthetic Influencing factors Orientation & fenestration Swift Passivhaus MKII, Harrogate Swift Passivhaus MKII, HarrogatePius Platz, Munich, Architects Allmann Sattler Wappner
- 19. Windows Influencing factors • Windows - optimise daylight minimise heat loss especially on the North elevations • Landscape v portrait Landcsape orientated windows Portrait orientated windows Rainham, London, Macreanor Lavington architectsPfullingen, Germany, Architekt Rainer Graf
- 20. • 25-35% for South facing facades. Glazing maximised for winter heat shading important to minimise summer overheating • Fewer mullion reduced thermal bridges • Generally deeper window reveals Windows Influencing factors Wiesen, Germany, Architekt Hans Peter Halbritte
- 21. Influencing factors • Best quality architectural daylight • Poor thermal bridging PSI values 10 times worse than windows = big heat loss • Not the best for solar heat from sun • Very hard to get flush with the roof C/O Croft farm construction, Acomb, York, Swift Passivhaus MK1, Harrogate Windows
- 22. Influencing factors • Thermal bridge free solar shading, car ports, canopies, bike stores, pv shades • No eaves or thin eaves Minimising Eaves details Social Housing Wimbish - Parsons Whittley Detail design “Outside the box” elements Entrance canopies Architektur werkstatt vallentin
- 23. Influencing factors Detail design Timber -Beattie passivhaus system Cavity wall, Acomb , York, Ann Thorne SIPS ICF Cavity wall, Denby dale, Huddersfield Green Building Store • Any materials /construction goes
- 24. Planning Perception & challenges • A new aesthetic ? Smaller windows • fitting in with streetscape • Watch bay window precedents The North facade Swift Passivhaus Mark I, Harrogate
- 25. • Problematic detailing but can be overcome • may need increased insulation elsewhere Detail aesthetic Planning Perception & challenges Swift Passivhaus Mark II, Harrogate
- 26. Planning Perception & challenges Detail aesthetic Swift Passivhaus Mark II, Harrogate Kamakura, Kanagawa, Japan, Key architects
- 27. • Historic areas demand traditional aesthetic • Problematic detailing but can be overcome Planning Perception & challenges Detail aesthetic Ritchie house, Maddison Park, Seattle Obermenzing schramelstrasse, Architektur werkstatt vallentin Michael Tribus - Renovation of a former post office to a passivhaus certified civic office
- 28. Planning Perception & challenges Detail aesthetic Swift Passivhaus Mark II, Harrogate Porche 2015 Porche designed VW beetle 1938 Porche designed VW beetle 1938 Passivhaus Build 2015Standard Built 1938 Standard Built 1938 • Easiest to design to the science and reflect a modern aesthetic
- 29. Conclusions • Early pioneers focussed on building physics not architectural requirements • Passivhaus community are continuously developing details and passivhaus architectural aesthetics are evolving • You can create (traditional or contemporary aesthetic) anything but it may take considerable detail design development, modelling and cost • Easiest to design to the science and reflect a modern aesthetic • Planners are becoming more aware of the issues in delivering passivhaus schemes which helps!
- 30. Conclusions Logic will get you from A to B imagination will take you everywhere – Albert Einstein Thank you vallentin-architekture