LEI’s air purifier for subdivided units receives Silver Medal at the Geneva International Exhibition of Inventions

The SDU Air Purifier designed by the Lingnan Entrepreneurship Initiative (LEI) for Hong Kong’s subdivided unit households has received a Silver Medal at the Geneva International Exhibition of Inventions, one of the world's most important annual events devoted exclusively to inventions.


The air purifier, which costs under US$15, is effective in reducing the indoor concentration of fine particulate matter (PM 2.5) by 80%, to less than 5 μg/m3, meeting the World Health Organization (WHO) 2021 Global Air Quality Guidelines.



The purifier can operate for 40 hours on a small 10,000mAh USB power bank.


This is the fourth award LU has received from The Geneva International Exhibition of Inventions in two years, following medals for the 2022 CREW Wheelchair (Gold), 12° Mask (Silver), and FlashGreen (Silver) projects.



Dr Ko demonstrates the purifer and other initiatives of LU at the Geneva International Exhibition of Inventions.


“We are delighted by this renewed recognition by the Geneva International Exhibition of Inventions for our humanitarian products. It is an acknowledgement of the team’s efforts and the University’s endeavours to address the sustainable development goals set by the United Nations, and make an impact on society and beyond,” says Dr Albert Ko, Director of LEI and the Office of Service-Learning.


Dr Ko was recently interviewed by the brand-new Lingnan University Magazine. Watch the video to learn more about his experiences with Doctors without Borders, and his career as an engineer.