Energy-led domestic retrofit: impact of the intervention sequence


Interviews conducted with householders reveal that energy efficiency is often a lesser motivation than other factors for undertaking home improvement work. Homeowners’ approach to refurbishment is typically staged over several years, not as a whole-house retrofit. As the operational performance of an individual emission-reducing technology typically depends on what other measures are already in place, the retrofit intervention sequence can potentially affect the overall performance of the dwelling. The impact of the intervention sequence on a semi-detached 1930s' house is investigated with dynamic thermal modelling, using five sequences based on different homeowner personas developed from qualitative interviews. The results show that whilst a whole-house retrofit would reduce cumulative CO2 emissions over 25 years by 54%, the sequences actually implemented by the individual households result in significantly smaller reductions of between 42% and 24%. This variation in operational performance due to the intervention sequence means that there is a variable return on the investment for a particular technology and, significantly, that different sequences will yield different cumulative emission reductions. This has significant consequences for policies providing financial incentives for energy-led retrofit, particularly to include the intervention sequence and timing.

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Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Aston STEM Education Centre
Additional Information: © 2015 The Author(s). Published by Taylor & Francis. This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( Licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Funding: Research Councils UK Energy Programme and E.ON [grant number EP/G000387/1].
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Related URLs: https://www.tan ... nline_TrendMD_0 (Publisher URL)
PURE Output Type: Article
Published Date: 2016-01-01
Published Online Date: 2015-01-08
Authors: Simpson, Sophie
Banfill, Phil
Haines, Victoria
Mallaband, Becky ( 0000-0003-3370-7486)
Mitchell, Val



Version: Published Version

License: Creative Commons Attribution

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