File:External wall u-values in residential buildings by construction year.jpg

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External wall u-values in residential buildings by construction year. Image source BSRIA iNSPiRe and its approach to achieving effective retrofit. https://www.bsria.co.uk/information-membership/bookshop/publication/delta-t-january-2016/

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current11:23, 1 March 2016Thumbnail for version as of 11:23, 1 March 2016624 × 444 (89 KB)Designing Buildings (Talk | contribs) (External wall u-values in residential buildings by construction year. Image source BSRIA iNSPiRe and its approach to achieving effective retrofit. https://www.bsria.co.uk/information-membership/bookshop/publication/delta-t-january-2016/)