Winter (Air) Is Coming

Another year, another Beijing winter. As winter arrives to Beijing, I got to wondering: how much worse is winter air? To get to the bottom of it, I analyzed the last seven years of US Embassy PM 2.5 data. I found that the capital’s air has averaged 111 micrograms in … Read more

Preparing for Air Pollution in Ulaanbaatar, Mongolia

Air purifiers and air pollution are probably the last things that come to mind when thinking of Mongolia. But maybe it should be the first, given how bad the air there is. I was living in Beijing during the airpocalypse, so I decided to buy an air purifier. Then I discovered … Read more

Indoor Air vs Outdoor Air: Which is Dirtier?

In places with heavy air pollution, going outside can often be daunting. Countries likes China, India and Indonesia see outdoor air pollution levels over 10 times the World Health Organisation safe limit. But are indoor PM2.5 levels any better ? I’ve tested indoor and outdoor locations around Beijing to see … Read more

Is Air Pollution a Problem in Mongolia?

Air pollution or grasslands – which is more likely to come to mind when you think of Mongolia? Air purifiers and air pollution masks certainly aren’t top on the packing list when people are heading off to Mongolia, but should they? According to The Guardian, Ulaan Bator is the world’s … Read more

Tackling New Frontiers of Air Pollution

Tackling New Frontiers of Air PollutionWatch this video on YouTubeSubscribe to Smart Air on YouTube   Today, I’m proud to announce a brand-new, revolutionary product for a problem that has been ignored–been swept under the rug for too long. Finally, a solution to a problem we all face.

What Time of Day Is PM 2.5 the Lowest?

My intuition has always been that air pollution is lowest at night because there are fewer cars on the road and fewer factories humming. Apparently I’m not alone: 139 voted for their guess about what time of day has the lowest PM 2.5, and night time came in first: I … Read more

Is Guangzhou’s Air Safe?

Beijing’s air pollution is the most famous in China, but that can make people in some other cities think their air is good–at least, not as bad as Beijing’s. But is the air in other cities safe? In 2013, Shanghai had newsworthy air pollution that convinced many people in Shanghai … Read more

How Long Do Smart Air HEPAs Last? At Least 90 Days

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 … Read more

Chinese New Year fireworks pollution

Do Chinese New Year Fireworks Pollute Indoor Air?

I’ve posted data before showing that outdoor air quality is strongly correlated with indoor particle counts (r = .71), but Chinese New Year gives nerds like me a great chance to see what happens when we get a momentary shock to air quality. The media made a big deal about people cutting … Read more

Smart Air is a social enterprise that creates simple, no-nonsense air purifiers and provides free education to protect people’s health from the effects of air pollution. We are proud to be the only certified B-Corp dedicated to fighting air pollution.