Some clever entrepreneurs out of Beijing have developed a DIY air purifier that’s cheap and quite effective, according to tests, so that you don’t have to burn a hole through your pocket and/or esophagus in this great land of smog that many of us lovingly call home.
The purifiers are constructed out of fans and HEPA filters purchased from Taobao and are sold in kits on the web site. The most basic kit goes for 200 RMB and boasts a 92 percent rate of effectiveness at reducing PM2.5 particles, based on eight-hour tests in a 15 square meter bedroom. The Cannon kit, recommended in larger spaces, goes for 450 RMB has a 96 percent rate of effectiveness.
The site also offers links for customers to buy HEPA filters and fans on their own, because they’re good guy researchers who just want people to know that expensive (some go as high as 11,000 RMB) store-bought filters are not necessarily the best.
We’re more committed to spreading the knowledge that HEPA filters are a cheap way to effectively combat air pollution than we are to making money, so we’d never discourage anyone from buying the same parts elsewhere.
We just try to make the parts easier to get for people who don’t want to scour Taobao for the cheapest filters.
Note that a recent increase in demand from Shanghai has backed up orders on the web site.