Occupant- owner preferences in decision making of low energy renovation concepts

Panel: Panel 3 Behavioural analysis

Authors:
Clarine J. van Oel, Delft University of Technology, Faculty of Architecture, Department of Real Estate & Housing, Delft, The Netherlands.
Arjan Bogerd, Delft University of Technology, Faculty of Architecture, Department of Real Estate & Housing, Delft, The Netherlands.
Guus J. de Haas, Delft University of Technology, Faculty of Architecture, Department of Real Estate & Housing, Delft, The Netherlands.

Abstract

Ambitious levels of CO2 reduction might be only reached if there is sufficient commitment among owner-occupiers to engage in ambitious renovation measures directed at energy savings. The here reported study was part of the larger RIGOUREUS project aimed at developing high ambitious renovation concepts by including residents’ perspective from the very beginning. A questionnaire using discrete choices of sets of two images was used to evaluate the preferences of 1565 members of the Dutch Association of Occupant-owners (VEH). Every image had six attributes, namely 1) insulation of the outer wall, 2) innovative sustainable technical measures, 3) simple payback time, 4) inconvenience during the works, 5) attitude/ behavior of occupant-owner, 6) increase of comfort. Results were analyzed with NLM. Results showed all attributes to be significantly involved in decision making.

People preferred light thermal insulation to medium or high levels, as this did not change the appearance of the dwelling. In addition, respondents preferred technical measures as solar boiler and heat pump to a package of measures creating 2 zones with different indoor temperatures. Also, a long simple payback time of 14-21 yrs was considered unacceptable. As expected, increase of comfort added to their appreciation.

Finally, respondents disapproved the option to refrain from household appliances or not to change their behavior at all. Instead, they preferred financial solutions like appliances with A++  energy labels.

Paper

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