HEPA Longevity Test: 170 Days

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 … Read more

Is air pollution affecting your productivity?

We know that air pollution is bad for our health, it causes heart attacks, strokes and lung cancer. But how about the more day to day impacts of air pollution? Feeling tired, drowsy or does going to the office make you sick? The data shows that poor indoor air quality is … Read more

Smog doesn’t kill like you think it does

The World Health Organization tallied up all the deaths due to outdoor air pollution based on different causes, and the major killer isn’t what most people think.      Asthma, lung cancer, and emphysema come to mind when we think about air pollution. But lung problems are only a small portion of the … Read more

What are ionizers and do they work?

The other day, someone on Quora asked whether ionizers actually purify the air. This is an important question because ionizer purifiers are all over the place. For example, I was at a friend’s apartment in the US, and I saw his tower fan had an ionizer button on it:     It’s … Read more

Can I Clean or Wash HEPA filters?

HEPA filters are a nearly perfect solution for air pollution. They are backed by tons of scientific tests; they’re pretty cheap; they use about as much energy as a lightbulb; they even have documented health benefits. Just about the only remaining problem is that you have to throw out the HEPA filters every … Read more

How Big of a Room Can the Cannon Clean?

After I tested every fan in China I could find with a flat front… …the results of one fan stood out above the rest. Because of its appearance and how much butt it kicked, I called it “the Cannon.” In Anna’s 15m2 Beijing bedroom, it crushed particulates. It removed 97% of … Read more

How accurate are common particle counters?

When I started Smart Air in 2013, I wanted to buy an air quality monitor. I had basically two options. I could buy a US$260 Dylos or spend thousands of dollars on the crazy expensive particle counters. Since then, the market has exploded with new air quality monitors as cheap as … Read more

Is It True That Masks Last Just One Day?

We posted info and data on our findings on whether masks really can stop pollution. My judgment after reading up on mask tests and testing them myself is that the science is pretty well settled. Masks do work. But there are still mysteries that need answers. Perhaps the biggest mystery out there … 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.