Air pollution is considered as the biggest threat to the environment and people’ life in the world. Apart from daily industrial and mobile pollution sources, the raging outbreak of the Australian bushfires have significantly raised people’s awareness of the worsening of air quality, and we human beings have to confine ourselves within the shelter of buildings when there is heavy pollution. However, the study believes that buildings can contribute to the achievement of a favourable environment. An extra function of the building façade is therefore expected, namely, the function of air purification to improve the surrounding environment. Based on the problem, the research question is: How to augment the capacity of an existing building façade with a purification system?
