Effectiveness of energy renovations: a reassessment based on actual consumption savings

Panel: 8. Monitoring and evaluation: building confidence and enhancing practices

This is a peer-reviewed paper.

Authors:
Faidra Filippidou, European Commission, Joint Research Centre (JRC) Petten, The Netherlands
Nico Nieboer, Delft University of Technology
Faculty of Architecture and the Built Environment
OTB – Research for the Built Environment, The Netherlands
Henk Visscher, Delft University of Technology
Faculty of Architecture and the Built Environmen, The Netherlands

Abstract

Energy renovations offer unique opportunities to increase the energy efficiency of the built environment and for the existing housing stock, they are the most important solution. Usually, energy savings are based on modelling calculations. However, recent research has shown that the predicted energy consumption differs largely from the actual consumption. In this paper, the effectiveness of energy measures is re-assessed based on actual consumption data. We use a monitoring system, which contains information about the energy performance of around 60% of the Dutch non-profit housing sector (circa 1.2 million dwellings). We connect the data from this monitoring system to actual energy consumption data from Statistics Netherlands on a dwelling level. Using longitudinal analysis methods, from 2010 to 2014, we are able to identify the energy efficiency improvements of the stock and determine the effectiveness of different measures in terms of actual energy savings. The results reveal the actual energy savings of different efficiency measures and highlight the significance of the actual energy consumption when a renovation is planned or realized.