Recent Filters Articles:

Does Carbon Really Work?

Companies sell activated carbon filters to remove chemicals like formaldehyde and benzene, but does carbon really work? The Smart Air lab put real-world carbon filters to the test. Who Needs Carbon Filters Anyway? I wrote early on that my number one concern in China is particulate pollution. It’s on so many people’s minds that nowadays even […]

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Does Activated Carbon Really Work

Types of Filters

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 […]

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Q&A

joshuaw81 提问: Hi Thomas, just started one of your cannon kits earlier today and it’s already turning gray. Already a fan of your work! Two quick questions for you: 1- I received a foam/fiber square that is white on one side and light green on the other. I’m assuming this is packaging, and not part […]

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