Xiaomi Air Purifier 4 Review: One Big Concern

For many years, Xiaomi air purifiers have been one of the better value air purifiers in many markets around the world. Unfortunately, Smart Air’s 2023 review of the new Xiaomi Smart Air Purifier 4 found the Mi 4 comes with a potentially dangerous technology. Xiaomi Mi 4 Air Purifier: What’s …

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What Do Air Purifiers Do and How Do They Work?

Recently I discovered thousands of people ask Google “What do air purifiers do?” and “How do air purifiers work?” each month. Ten years ago, Smart Air’s founder and University of Chicago Professor Thomas Talhelm had these questions too. In fact, these questions ultimately led Thomas to create Smart Air and …

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What is a HEPA filter and how does a HEPA filter work?

What Are HEPA Filters and How Do They Work?

The term “HEPA filter” can be confusing. What does HEPA stand for? What is a HEPA filter made from, and what actually makes it a HEPA filter? What is a HEPA Filter? “HEPA” stands for “high-efficiency particulate air” (filter). It sounds complicated, but HEPA air filters are nothing fancy. They …

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Study Finds Ionizers Increase Air Pollution

A peer-reviewed study from the University of Texas finds that ionizers increase air pollution, creating formaldehyde, ozone, and particulate. This data contrasts sharply with claims from air purifier companies that market ionizers as magical machines. One company in China claims that their machine’s negative ions “remove PM2.5 particulate pollution and …

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What Are Ionizer Air Purifiers and Do They Work?

What are ionizer air purifiers and do they work? This is an important question because ionizer air purifiers are all over the place. For example, I was at a friend’s apartment in the US, and I saw his tower fan air purifier had an ionizer button on it: Ionizer air …

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Smart Air Sqair air purifier used for clean air filtration in school classroom

70% of Teachers Turn Off or Lower Classroom Air Purifiers

Air purifiers in classrooms are more and more common due to the pandemic to reduce virus spread. Unfortunately, most classrooms do not get the full benefit of air purifiers because most of the time teachers end up turning them off or down! Why Are Teachers Turning Air Purifiers Off? In …

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Smart Air low cost purifiers

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

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