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

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, Ulan Bator is the world’s …

Read more

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

PM2.5 Particle Size Virus

The Really Small Stuff

An open-data DIY air purifier test found that even simple, homemade purifiers can reduce particulate, but can they capture the smallest particles? This question is important because it’s the smallest particles that can penetrate deep into our lungs and even enter our bloodstream. To test how effective the DIY purifier …

Read more

Smoking is Worse than Outdoor Air Pollution

A while back, I posted data I collected from places around Beijing showing that indoor air is consistently cleaner than outdoor air. When I analyzed that data, I excluded places that allow smoking, but I’m posting the data here now: Even on days where outside air was bad (AQI ~ …

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.