Passivhaus Affiliate

Passivhaus & Embodied Carbon

PHT activities

Training & Resources

Case studies

Carbon Counting Tools


The Passivhaus standard champions an efficiency first approach renowned for squashing energy consumption and eliminating the performance gap in buildings without compromising on health or comfort. Do thicker insulated walls, triple glazed windows, & MVHR units tip the scales unfavourably for Passivhaus when it comes to embodied carbon?

As buildings become more energy-efficient, and with a rapidly decarbonising National Grid, the balance between the carbon emitted when running a building (operational carbon) and the carbon emitted to build it (embodied carbon) is changing.

Two of the most common materials in construction, steel and concrete, are responsible for 15% of global carbon emissions. To address the climate emergency, we must tackle the whole life carbon of buildings addressing both operational and embodied carbon of buildings simultaneously.

The “cradle to grave” whole life carbon footprint provides a good indication of a building's carbon impact through its lifetime. From product material extraction to ultimate building demolition (or better still deconstruction).

 Passivhaus & Embodied Carbon © Passivhaus Trust

 

Passivhaus buildings are optimised for net-zero, providing the best route to minimise whole-life carbon. Outstanding levels of building performance minimise operational carbon, while the Passivhaus design methodology encourages optimisation of embodied carbon through efficient use of materials and radically reducing the heat and cooling plant.

PHT Embodied Carbon Paper


Passivhaus can apply to any construction method. This design flexibility allows its application across various vernaculars. It is material agnostic and can apply to any form of construction, from concrete, steel, timber, or straw.  

The Passivhaus community is increasingly acknowledging and focusing on the issue of material choices, resource efficiency and the circular economy, demonstrated by the development of several carbon counting tools, including the PHribbon plug-in for PHPP.

 

PHT Activities 

It has sometimes been argued that designing to decrease operational carbon emissions increases embodied carbon emissions. Do thicker insulated walls, triple glazed windows, & MVHR units tip the scales unfavourably for Passivhaus when it comes to embodied carbon? What is the embodied carbon impact of renewable technologies? Are low carbon materials better for our health? The resources & research below explore these concerns, and outline the Trust’s current activities on the subject:

 

 PHT Embodied Carbon position paper    PHT Embodied Carbon Primer

PHT Embodied Carbon paper

 

PHT Embodied Carbon Primer

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Training & Activities

Get ahead by up-skilling with the Trust's following on-demand training resources:

Passivhaus & Embodied Carbon webinar

Passivhaus & Embodied Carbon webinar

  • 1 webinar: 1.75 hours

  • 2 PHI Credit Renewal Points

Online course: Getting to Net Zero

Getting to Net Zero tutorial: on-demand

  • 8 on-demand modules: 30 mins each

  • 4 PHI Credit Renewal Points

Passivhaus Retrofit Masterclass lecture series

Retrofit Masterclass lecture series: on-demand

  • 6 on-demand lectures: 1.5 hours each

  • 12 PHI Credit Renewal Points

 

Keep an eye on our certified training listing for upcoming tutorials on PHribbon and associated webinars. Below you will find further useful resources. Watch several free webinars that we have compiled into a handy playlist.

LETI Embodied Carbon Primer RICS Whole life carbon assessment for the built environment Straw Construction in the UK Embodied Carbon Guidance - Wood Knowledge Wales

LETI Embodied Carbon Primer

RICS Whole life carbon assessment

Straw Construction in the UK

Embodied Carbon Guide

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Case studies

The handful of schemes below all champion low embodied carbon, whilst meeting (or aiming for) Passivhaus certification. They provide a variety of building typologies, but for more examples in the UK please visit our Passivhaus projects gallery and map, or search for inspiration further afield in the  International Passivhaus Buildings Database.

Enterprise Centre UEA © Architype Larch Corner Passivhaus © Mark Siddall Kew Gardens Learning Centre © HMY Architects
Ostro Passivhaus © Paper Igloo Hackbridge Primary School Passivhaus Plus. © Architype Old Holloway ©Juraj Mikurcik
PYC Offices © PYC Group The Old Woodyard Herefordshire Passivhaus self build © Architype Geanaisean Passivhaus © MAKAR

Retrofitting existing buildings is almost always the best option with embodied carbon in mind. Even compared to a timber-framed new build – retrofit can often account for a fraction of the embodied carbon of a similar-sized new build project.

Zetland Road EnerPHit Plus © Ecospheric Entopia Building © Soren Kristensen Shepherds Barn EnerPHIt Plus © Mark Siddall

What about in retrospect? Read some interesting exploration surrounding embodied carbon in the UK’s first cavity wall Passivhaus at Denby Dale. We also highly recommend visiting a Passivhaus – take advantage of the biannual International Passivhaus Open Days.

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Carbon Counting Tools

 PHribbon PHPP plug-in for measuring embodied carbon

 

  • ECCOLAB: A carbon counting tool, developed by PHT Patron Architype, helps designers explore and model the lifecycle energy, carbon and cost impacts of different design options. The tool has BIM/ REVIT integration capabilities and can be used in parallel with PHPP Passivhaus software. ECCOLAB undertakes whole life carbon modelling of all stages of a project and is especially useful in early project decision-making.

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The relationship between embodied and operational carbon is rapidly changing, as energy supplies decarbonise worldwide. Continuing to reduce energy demand remains critical as it reduces peak loads and shrinking our collective winter energy demand will reduce the level of future zero carbon energy infrastructure and storage needed. Designing to Passivhaus standard does not need to result in increased embodied carbon and that choice of materials, rationalisation of build form and reduction of building services play a significant part in reducing whole carbon.

Whole Life Carbon

 

Further Information

Passivhaus & Embodied Carbon webinar 

Passivhaus Primers: Net Zero, Retrofit, Embodied Carbon

Getting to Net Zero: on-demand tutorials

PHribbon

Passivhaus & Zero Carbon

Passivhaus Plus & Premium

iPHA webinar: Embodied energy and carbon in Passivhaus construction

RICS: Whole Life Carbon Assessment for the built environment

Passivhaus Benefits

Efficiency First Campaign