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Murphy L.,OTB Research Institute for the Built Environment
Energy Policy | Year: 2014

Energy audits are promoted as an effective tool to drive investment in energy efficiency measures in the residential sector. Despite operating in many countries for several decades details of the impact of audits are mixed. The aim of research presented here is to explore the role of audits on investment in energy efficiency measures by private owner-occupied householders in the Netherlands. Results showed that the main influence of the energy audit was to confirm information held by householders. A significant portion of audit recommendations was ignored, the main reason being that householders considered their dwellings to be adequately energy efficient. A comparison of audit recipients to non-recipients showed that audit recipients did not adopt, plan to adopt or invest in more energy efficiency measures than non-recipients. In fact non-recipients adopted more and invested more in measures. It is concluded that energy based renovation is driven by householder perception of comfort and acceptable outlay on energy bills and not necessarily to expert technical tailored information on the potential to reduce CO2 emissions and environmental impact. Results support arguments for minimum energy efficiency standards and performance based incentives. © 2013 Elsevier Ltd.


Heinen E.,OTB Research Institute for the Built Environment | Maat K.,OTB Research Institute for the Built Environment | Van Wee B.,Technical University of Delft
Transportation Research Record | Year: 2011

This paper, using longitudinal data for 633 part-time bicycle commuters, investigates day-to-day decisions to commute by bicycle. Previous research has investigated mode choice, travel destination, and other travel choices for 1 day only. However, it cannot be assumed that travel choices do not vary from day to day and that most individuals travel by the same transportation mode every day. Day-to-day decisions to cycle are affected by work characteristics, commute journey characteristics, and weather conditions. More specifically, workers wearing business attire, needing to transport goods, needing a car during office hours, having longer commute distances, commuting in the dark, and facing a higher wind speed or a more or longer duration of rain are less likely to commute by bicycle. Positive effects were found for temperature and the duration of sunshine. The results show that factors that can differ on a daily basis largely influence bicycle mode choice from day to day. The results show that two groups of part-time cyclists exist: occasional cyclists and frequent cyclists. Whereas the decisions of occasional cyclists to commute by bicycle are more affected by positive weather conditions, frequent cyclists are discouraged from cycling by more practical barriers, including wind speed and the need to be at multiple locations.


Visscher H.,OTB Research Institute for the Built Environment | Meijer F.,Technical University of Delft | Itard L.,OTB Research Institute for the Built Environment
COBRA 2010 - Construction, Building and Real Estate Research Conference of the Royal Institution of Chartered Surveyors | Year: 2010

Since a few years the attention for building regulatory systems and enforcement procedures is growing. Various developments in society, politics and the construction industry have influenced changes in the systems of building control in the last 20 years. The influence of climate change and the related demands on buildings will have a very strong impact of further transformations in this field. This was a reason to initiate a new CIB taskgroup (TG79) focussing on building regulations and control in de the face of climate change. In this paper we present some research findings about the relation between regulations and actual performances of buildings. These experiences make clear that the function of building control might change in the next years.


Doling J.,University of Birmingham | Elsinga M.,OTB Research Institute for the Built Environment
International Journal of Housing Policy | Year: 2012

This review concerns housing equity and the way it is used as a pension, across the member states of the European Union. Its starting point is a correlation between trends over time in home ownership rates and ageing populations. It is not primarily about the role of governments or of financial institutions, but rather identifies existing evidence about how European households, in aggregate and as individuals, have used home ownership as a contribution to meeting income needs in old age. The review mainly draws on studies written in English and based empirically on more than one country. As the current literature, it is geographically skewed so that conclusions about Europe in its entirety are limited. Nevertheless, an overall conclusion is that housing equity has had a significant influence on the income of older Europeans. © 2012 Copyright Taylor and Francis Group, LLC.


Vernay A.L.,Technical University of Delft | Salcedo Rahola T.B.,Technical University of Delft | Salcedo Rahola T.B.,OTB Research Institute for the Built Environment | Ravesteijn W.,Technical University of Delft
3rd International Conference on Next Generation Infrastructure Systems for Eco-Cities, INFRA 2010 - Conference Proceedings | Year: 2010

In response to increasing environmental problems and consciousness in relation to urbanization, more and more cities are trying to become eco-cities. We can question, however, whether these cities can be considered as sustainable cities. The eco-city concept usually includes criteria regarding energy and water consumption, transport, waste management, amount of green spaces, etc. However, food consumed in the cities is usually marginally taken into account. Moreover, implementation strategies necessary to successfully make a transition to sustainability are rarely mentioned. The goals of this paper are twofold. First, we will ask attention for urban agriculture and include food in the eco-city equation. Second, we will argue that eco-cities should not be considered as project but operated as a process. ©2010 IEEE.


Murphy L.,OTB Research Institute for the Built Environment
Energy Policy | Year: 2014

All European Union Member States require an Energy Performance Certificate (EPC) when buildings are constructed, sold and rented. At its introduction the EPC was considered a pioneering instrument, one that would help overcome an information deficit hindering consumer interest in energy efficient dwellings. Now that the EPC has been implemented for several years it is possible to examine its impact. This research draws on data from ex-ante and ex-post assessments of the EPC in a number of countries and presents the results of a survey of Dutch private dwelling purchasers. This survey was based on two sample populations, one received an EPC during property transaction and another did not. Differences were sought between the two samples in a number of areas relating to the adoption of energy efficiency measures. Results show that many projections about the impact of the EPC have fallen short. The EPC was found to have a weak influence, especially pre-purchase. The potential of the EPC in driving energy efficiency improvement in the existing stock is doubted especially if it continues to act independent from a mix of instruments designed to tackle multiple barriers. It is argued that the energy saving potential of existing dwellings, applauded in climate change policy, will remain unexploited if it continues to be assessed subjectively by householders. © 2013 Elsevier Ltd.

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