When I started Smart Air, a lot of people asked me how long the HEPAs last. Several people criticized the DIY on Zhihu because they said you’d probably have to change the HEPA so often that it’d end up being more expensive than the expensive brands. At the time, I really wanted to pull out […]
How long do Smart Air HEPAs last? My quest to give a solid empirical answer has now completed 130 days! Gus is still dutifully tracking the effectiveness of the HEPA he’s been using in his bedroom since January (with a trip to the US in the middle), calculating the percent reduction in particulates every night. […]
Anyone who knows me knows that I’m a Luddite. I bought my FIRST smartphone last August. So we should be all the more surprised that I just created an official Smart Air WeChat account! Add me, and I’ll keep you up to date on all of our workshops, new tests, and projects. Use WeChat to scan this, […]
Premise: This blog is for people concerned about air pollution. There are many valid reasons people want air purifiers: pet allergies, pollen, and asthma. However, these are not what I’m concerned about while living in China. Here I assess purifiers solely based on whether they can help protect me from particulate air pollution. With that […]
When I did my first experiments, several people told me not to publish the data. “Don’t give it away for free,” they told me. “Use it to make money!” I decided then that my main goal wasn’t to make money. I almost got tricked into paying $1,000 for clean air, and I wanted to help […]
As a nerd who grew up listening to NPR, I was psyched to see Smart Air on NPR/PRI’s The World today! PRI journalist Rebecca Kanthor visited our Shanghai workshop and took audio with Henry and Gus.
The most frequent question people ask me these days is: how long does the HEPA last? This question is important because replacement HEPAs are the biggest long-term cost of clean air. IQ Air charges $370 for its filters. So if you have to replace the HEPA every two weeks, the DIY might not save you money in […]
In celebration of Earth Day, the US Embassy’s Beijing American Center hosted a Smart Air DIY talk and live test. According to Brian from the Center, “Gus brought down the house!” Thanks to our hosts for helping us get the word out about affordable clean air.
Beijing-based Dr. Saint Cyr’s tests of air purifiers were one of my original inspirations for the whole DIY project, so I was happy to see that the DIY recently became a part of those tests: These are the first independent tests of the DIY, and the results parallel mine. You could also include […]