Winter thermal comfort and health in the elderly

There is said to be a strong relationship between low winter fuel consumption and increased cold-related morbidities and mortalities in the elderly. However, no study has so far investigated baseline domestic thermal conditions, energy and health in this demographic - a crucial gap given an ageing population. Hence we examine, for the first time, the validity of current thermal comfort standards and World Health Organisation minimum temperature thresholds in the 65 + demographic, through a longitudinal study of thermal conditions in homes of the elderly. We cover two typical winters using repeated monthly surveys and continuous temperature monitoring in living and bed rooms. Results demonstrate that the widely used ISO7730 model significantly underpredicts comfort in this demographic. We use our data to create a new model for the elderly, with a 40% lower error rate. Using calibrated computer models, we demonstrate that our model predicts a 44% reduction in winter heating demand, compared to the current model. Finally, our data provides little evidence for an association between low indoor temperature and healthcare visits for a variety of morbidities. These results question current assumptions around thermal comfort and health in the elderly, with potential implications for health and energy policy.