Chronic obstructive pulmonary disease (COPD) is a significant cause of ill health, hospitalisation and death in England and Wales. It is known that damp conditions in housing aggravate the symptoms of asthma sufferers owing to a greater volume of inhaled airborne allergens, but while the pathology of COPD is also largely concerned with disrupted lung function, it has a number of different underlying traits. It is known that the symptoms are worse the lower external and internal temperatures become.