Use of Air Purifiers to Improve Respiratory Health in Children

The goal of this pilot study is to investigate if installing an air purifier in the homes of children and young people with asthma improves their asthma outcomes. The main questions it aims to answer are: * Does installing an air purifier in the homes of children and young people with asthma improve their asthma outcomes (including reduction in asthma exacerbations, improvement in symptom control, improvement in quality of life). * Is the use of an air purifier in the home acceptable to children and young people and their families?