Overview
- The Reddit post details a build using a 150mm exhaust fan, a HEPA filter, and basic materials for roughly Rs 2,000.
- The creator says the unit reduced a 12×12-foot room’s AQI from about 400 to near 50 in roughly 15 minutes at low fan speed.
- He also claims the device performs better than his Philips purifier, a statement reported from his post without third-party testing.
- The viral thread drew thousands of upvotes and requests for guidance, and the maker has posted a YouTube tutorial showing the assembly.
- Coverage situates the buzz in worsening air quality, citing Delhi’s October PM2.5 average of 107 µg/m3 and reporting AQI around 347 at noon on Nov. 8.