What Are Ionizer Air Purifiers and Do They Work?

The other day, someone on Quora asked whether ionizer air purifiers work and actually purify the air. This is an important question because ionizers are all over the place. Ionizer air purifiers are often marketed with a variety of names. These names include “ion air purifiers”, “negative ion air purifiers”, … Read more

N95 versus KN95 Mask Difference Standards

What’s the Difference Between N95 and KN95 Masks?

With such similar-sounding names, it can be confusing to understand the difference between N95 and KN95 masks. What are KN95 masks, and are they the same as N95 masks? This handy chart explains the differences between N95 and KN95 masks (and all characteristics that are the same). N95 vs. KN95 … Read more

Best air purifier protection COVID virus

Best Air Purifier for COVID-19 | Best Purifier Guide 2021

Air purifiers have become incredibly popular for those looking to protect themselves against COVID-19 and other viruses. That’s not surprising. Data shows that air purifiers can filter out COVID-19. In fact, the EPA now suggests portable air purifiers be used to improve ventilation to protect against COVID-19: However, when looking … Read more

N95 vs KF94 Mask Ratings

What’s the Difference Between N95 and KF94 Masks?

It turns out, the difference between N95 and KF94 masks is minor for the factors that most users care about. KF94 is the “Korean filter” standard similar to the US N95 mask rating. Difference Between N95 and KF94 Masks: Charted Out They look similar, and they filter a nearly identical … Read more

Does a wet mask work?

Are Wet Masks Less Effective?

Does a wet mask still work? If your mask is slightly wet, how does this wetness and humidity affect it’s performance? Fortunately, scientists have tested the effectiveness of wet masks. Researchers tested the performance of new and “wet” masks. They asked 22 people to wear either a DIY cloth mask, … Read more

Low Levels of Air Pollution Cause the Most Harm

Why Low Levels of Air Pollution Actually Cause the Most Harm

The latest research on the health effects of air pollution have discovered a surprising finding: low levels of air pollution are actually more harmful than higher levels. This data has potentially important implications for people living in relatively “clean” cities like New York and London. My Intuition About Air Pollution’s … Read more

Can Activated Carbon Remove Formaldehyde?

Can activated carbon filters remove formaldehyde and VOCs? Earlier tests from Smart Air found that carbon can reduce VOCs from cigarette smoke. But formaldehyde and VOCs in general are particular concern for many people. We put activated carbon filters to the test by ordering formaldehyde straight from the factory and … Read more

Air purifier filter living room clean filter entire apartment bedrooms doors open

Can One Air Purifier Clean an Entire House?

Several people have asked me if they can use one purifier to clean their entire apartment or house. For example, can I put a large purifier in the living room and avoid having to put purifiers in each room? The benefits would be great. This setup would be easier, cheaper, … 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.