Due to high rental costs, about 120,000 low-income families in Hong Kong are living in confined spaces with no windows or poor air circulation. Many of these subdivided units (SDU) are smaller than 14 m2, with the toilet and kitchen all crammed into the same space. The “PureAura” air purifier is a practical solution to improve air quality in these living conditions.

My team and I took Lingnan’s prototype and refined it into a clear product concept. This air purifier is straightforward to use. Just plug it in, and it runs quietly in the background. The housing is easy to assemble and secured by a simple elastic cord. We intentionally kept it low-tech, so anyone can see and understand how it all fits together. Priced at less than 15 USD, it operates for 40 hours on a 10,000 mAh USB power bank. Its flat-pack design ensures easy storage and distribution. With the power bank fitting neatly in the back, it's compact and perfect for SDUs.