How to transform European housing into healthy and sustainable living spaces using a Belgian case study? – the RenovActive principles tackle climate and renovation challenges

The RenovActive renovation concept seeks to offer healthy, affordable, easy to reproduce, scalable solutions for the existing building stock of European housing. The concept was developed and tested in a prototype phase, where 7 principles have been applied to a semidetached house built in the 1920s, situated in a garden city in Brussels. The renovated prototype was occupied by a family and monitored for two years. The monitoring was performed, after renovation, both through data, sensors, and extensive interviews and questionnaires with the family. In general, the family living in the house is very satisfied with the indoor environment. The results show a general indoor CO2- concentration below 900 ppm, and an indoor temperature between 21°C and 26°C. The technical and sociological monitoring show indication for the additional potential to optimize and improve indoor comfort levels and perception. As an example, there are discrepancies between setpoints and programming we initiated, based on standards and scientific inputs, based on predicted behaviors. But user interactions, and preferences in real life situation when occupying the house, as well as situational perceptions and culture, modified user setpoints compared to our initial setpoints, that in some settings could have a negative impact on the indoor environment. This indicates that a technical system operating the indoor environment must be both flexible and robust to accommodate for multiple and varying preferences of building inhabitants.publishedVersio

The Representativeness of Online Time Use Surveys. Effects of Individual Time Use Patterns and Survey Design on the Timing of Survey Dropout

Like other surveys, time use surveys are facing declining response rates. At the same time paper-and-pencil surveys are increasingly replaced by online surveys. Both the declining response rates and the shift to online research are expected to have an impact on the representativeness of survey data questioning whether they are still the most suitable instrument to obtain a reliable view on the organization of daily life. This contribution examines the representativeness of a self-administered online time use survey using Belgian data collected in 2013 and 2014. The design of the study was deliberately chosen to test the automated processes that replace interviewer support and its cost-efficiency. We use weighting coefficients, a life table and discrete-time survival analyses to better understand the timing and selectivity of dropout, with a focus on the effects of individual time use patterns and the survey design. The results show that there are three major hurdles that cause large groups of respondents to drop out. This dropout is selective, and this selectivity differs according to the dropout moment. The contribution aims to provide a better insight in dropout during the fieldwork and tries to contribute to the further improvement of survey methodology of online time use surveys

How to transform European housing into healthy and sustainable living spaces using a Belgian case study? – the RenovActive principles tackle climate and renovation challenges

The RenovActive renovation concept seeks to offer healthy, affordable, easy to reproduce, scalable solutions for the existing building stock of European housing. The concept was developed and tested in a prototype phase, where 7 principles have been applied to a semidetached house built in the 1920s, situated in a garden city in Brussels. The renovated prototype was occupied by a family and monitored for two years. The monitoring was performed, after renovation, both through data, sensors, and extensive interviews and questionnaires with the family. In general, the family living in the house is very satisfied with the indoor environment. The results show a general indoor CO2- concentration below 900 ppm, and an indoor temperature between 21°C and 26°C. The technical and sociological monitoring show indication for the additional potential to optimize and improve indoor comfort levels and perception. As an example, there are discrepancies between setpoints and programming we initiated, based on standards and scientific inputs, based on predicted behaviors. But user interactions, and preferences in real life situation when occupying the house, as well as situational perceptions and culture, modified user setpoints compared to our initial setpoints, that in some settings could have a negative impact on the indoor environment. This indicates that a technical system operating the indoor environment must be both flexible and robust to accommodate for multiple and varying preferences of building inhabitants