Dyson Pure Cool Review: Tests Show Only 49% Effective

New Dyson Pure Cool TP04 tests show the purifier reduced indoor PM2.5 pollution levels by just 49% in a typical size room. This data adds to a growing amount of reviews and tests showing the Dyson air purifier underperforms purifiers far cheaper than it. Dyson Pure Cool TP04 Test: Marketing … Read more

Do Air Purifiers Dry Out the Air?

Empirical data shows that air purifiers are great at cleaning air, but do they dry out the air and lead to other health problems? For me, dry air is mostly just a comfort issue. But for some people, dry air can exacerbate health problems like allergies and bronchitis. Do HEPA … Read more

使用风速表测Sqair中流出的速度

Why a Weaker Filter Actually Makes a Stronger Purifier

Why does Smart Air’s latest air purifier, The Sqair, use a weaker filter–an H11 HEPA compared to the H12 and H13 HEPA filters out there? Tests of different filter grades revealed that weaker filters sometimes make stronger purifiers.     Of course, purifier companies like to market their filters as … Read more

Do Air Purifiers Remove PM2.5?

When I was coughing through Beijing’s airpocalypse and thinking about buying an air purifier, I wanted to know something first–do air purifiers really remove PM2.5?     I wondered because I saw lots of air purifier tests on pollen, but pollen is generally 10 microns or larger, whereas I was … Read more

What Is the Best Air Purifier on the Market Today?

I started thinking about finding the best air purifier for my home because I was living in Beijing when the “airpocalypse” struck.     I had a cough I couldn’t shake for weeks, so I started doing research into air purifiers. Unlike another answer here, I wasn’t concerned about allergens … Read more

Air Purifiers Shown to Improve Health in Just 48 Hours

When we think about harms of air pollution, we often think about the health impacts on infants and the elderly. But does air pollution affect the health of young, healthy people? And if so, can air purifiers help reduce the health impacts of air pollution? Do purifiers have real health … Read more

Is the Laser Egg Only Accurate in Beijing?

A few months ago, Smart Air tested the Laser Egg, the Node, and the Dylos against official PM2.5 readings. The results were way better than I expected! All three machines correlated r = .90 or higher with the gold-standard numbers, which is very high. But this test may have exaggerated their … 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.