This is an Open Access Article. It is published by Taylor and Francis under the Creative Commons Attribution 3.0 Unported Licence (CC BY). Full details of this licence are available at: http://creativecommons.org/licenses/by/3.0/ A separate file of personas is also included in the download.
This work formed part of the CALEBRE Project
funded by the Research Councils UK Energy Programme
and E.ON, to whom the authors express
their gratitude. It formed part of project CALEBRE
(Consumer-Appealing Low Energy Technologies for
Building Retrofitting) [grant number EP/G000387/1]
funded by RCUK and E.ON.