Two Delhi students co-founded Project Vayu, a low-cost Rs 140 fan-mounted filter that uses electret media to capture PM2.5 and improve classroom air quality. Distributed free to underprivileged Delhi schools, it has reached over 10,000 students. The easy-to-install, tool-free filter is replaced monthly, and co-founder Krish Aggarwal earned a place on the 2026 Diana Award Roll of Honour.
