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Whole life carbon accounting for the Treasury Green Book John Connaughton Davis Langdon

Whole life Carbon Accounting: Key points. Whole life CO2. . Whole life Carbon Footprint . . In-use CO2. Embodied CO2. Regulation (Part L) is reducing the relative significance of in-use emissionsMajor construction materials/components are relatively energy intensive, andMany low energy/carbon strategies are resource intensive (eg increased mass; tehcnology strategies) .

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Whole life carbon accounting for the Treasury Green Book John Connaughton Davis Langdon

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    1. Whole life carbon accounting for the Treasury Green Book John Connaughton Davis Langdon

    2. Whole life Carbon Accounting: Key points

    3. Whole life CO2 Regulation (Part L) is reducing the relative significance of in-use emissions Major construction materials/components are relatively energy intensive, and Many low energy/carbon strategies are resource intensive (eg increased mass; tehcnology strategies)

    4. Why embodied? Rule of thumb: 75:25 operational to embodied ratio for buildings BUT IS THIS CORRECT? Surely the proportion will vary depending on building type?

    5. Why embodied? What is the impact of the trend towards ‘zero carbon’ buildings?

    6. Calculating Embodied Carbon

    7. Calculating Embodied Carbon

    8. Some challenges

    9. Embodied CO2 benchmarking with Davis Langdon’s Carbon Calculator

    10. Offices CO2 emissions study

    11. Whole life carbon impact : the bigger picture Recent study by a major offices developer to assess CO2 in existing office stock

    12. The increasing significance of embodied carbon

    13. The Green Book Best practice techniques for project and policy assessment Describes how economic, financial, social and environmental assessments should be combined Where possible, attributes monetary values to impacts Assesses costs and benefits at market rates Some important issues for whole life carbon: Green Book excludes sunk costs Includes residual value (at end of life?) Assessign GHG emissions – reference to DEFRA work on social cost of carbon

    14. CEN/TC 350

    15. CEN/TC 350

    16. Current measurement issues and challenges Will CEN/TC 350 resolve them? Consistent product data – what are things actually made of? Consistent carbon data – what is the impact? Manufacturing processes, energy sources, location/transport, etc Bio-renewable (organic) materials Boundary conditions – including accounting for recycled content and recyclability?

    17. Some thoughts on whole life carbon accounting Shortcomings in ‘global’ indicators for buildings – eg kgs of whole life CO2 per square metre floor area Take a lead from CEN/TC 350 and express impacts over key stages Product Embodied Construction Including ‘start of life’ demolition, enabling work In use Including repair, maintenance and replacement End of life Including ‘end of life’ demolition; recyclability? This could help: Set and understand benchmarks Improve the regulatory focus

    18. Whole life carbon accounting for the Treasury Green Book John Connaughton john.connaughton@davislangdon.com Davis Langdon

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