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These estimates of energy savings were assembled by Cambridge Architectural Research in August-September 2022, under contract to Nesta, the UK innovation agency for social good. This work builds on the work CAR carried out for the Department of Energy and Climate Change (now BEIS) in 2012. The methods are updated, and the UK housing stock is now larger and somewhat more energy efficient, so the findings are not directly comparable.
In all cases, per-dwelling energy savings are estimated using the best-available evidence, supplemented by modelling and explicit assumptions that are recorded in the worksheets here. In many cases the evidence base is limited, and likely to improve over time. This workbook is intended to be updated over time as more evidence becomes available.
There is more information about the Cambridge Housing Model, used as a starting point for some of the estimates, here:
http://tinyurl.com/HousingFactFile
There is also more information about CODE, the Cost-Optimal Domestic Electrification model, which is also used for some estimates, here:
https://www.gov.uk/government/publications/cost-optimal-domestic-electrification-code
CAR's original work quantifying energy-saving behaviours is available here:
https://www.gov.uk/government/publications/how-much-energy-could-be-saved-by-making-small-changes-to-everyday-household-behaviours
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WorksheetsOverview
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Summary
An overview of our findings, drawing information from all other sheets
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PackagesTwo illustrative packages of multiple energy-saving actions. Note that in most cases savings cannot be simply added together.
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Other sheetsDetailed discussion and calculations behind each of the Energy-Saving Actions listed in the Summary sheet
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