Amazon’s Secret Air Purifier Sale Is Just in Time for Allergy Season

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Indoor and outdoor air pollution is a growing global concern. Breathing in polluted air can worsen asthma and lead to other health concerns, like increasing the risk of cancer and strokes, according to a study published in the National Library of Medicine. That same study found that indoor air filters and purifiers were successful in reducing unwanted particles. Researchers found that HEPA (high-efficiency particulate air) filters can "capture 99.7 percent of all particles 0.3 microns or smaller." And with the current wave of residual wildfire smoke sweeping down into the U.S. from Canada right now, we can't imagine a better time to invest in an air purifier.

Here at Popular Mechanics, we've long been at the forefront of testing and reviewing (and reading the fine print for) air purifiers. Our lists are thoroughly vetted by experts, and we read through hundreds of consumer reviews to make sure our picks are always top-notch.

When looking at air purifiers, it's also incredibly important to consider the size of your space, so we always note the optimal square footage so that consumers aren't powering up a too-small purifier and have it fall short of expectations.

Now, some of our all-time favorite portable purifiers and dust-specific filtering models are marked down on Amazon just in time for peak allergy season. Shop some of the best-reviewed, most trustworthy picks below.

On sale for under $45 right now, this portable air purifier is a nice option to cover smaller spaces in your home. Given its size and that it's designed to clean a space that's 178 square feet or less, our editors named this the best desktop air purifier. And Amazon reviewers seem to love it too, as it's a best-seller with over 10,000 five-star reviews.

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Core Mini

$42.95

amazon.com

Our editors love this air purifier for how quiet-yet-effective it is. It can clean the air in a room up to 2,000 square feet without getting much louder than that of a whisper. And best of all, right now you can snag one for 21 percent off on Amazon.

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Protect 7470i

$472.00

amazon.com

This low-cost model is meant for small spaces — under 130 square feet — so use it for kids’ rooms and dorms, or pair it with another model to double down on efficiency.

"The Levoit's triple-filtration system includes an ultra-fine pre-filter as well as an H13 HEPA filter with activated carbon, which is surprising given the price," Popular Mechanics editors reported.

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LV-H132 Air Purifier

$67.60

amazon.com

An economical choice given it covers 750 square feet and is currently almost 30 percent off, this PM pick is well-loved on Amazon. It has 4.7 stars after over 30,000 reviews, with customers saying it makes a noticeable difference.

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HPA104 HEPA Air Purifier

$113.59

amazon.com

Made for spaces under 403 square feet, this pick is high-tech and nearly silent. "At a max volume of 23 decibels, it's the quietest purifier on our list," editors wrote.

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Core 400S Purifier

$188.99

amazon.com

This Coway pick covers up to 1,560 square feet, so it's well worth the bigger price tag (which is currently over 30 percent off.) "It also has a variety of smart features, sleep settings, and a surprisingly compact design for such a capable portable air purifier... there's also a timer and pollution sensor," Popular Mechanics experts wrote earlier this year.

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Airmega HEPA Air Purifier

$507.24

amazon.com

This half-off Clorox option is best for rooms under 200 square feet. "I’ve only had this for about a week and I’ve already noticed a difference. I’m not as stuffy as I used to be when I wake up in the morning, and I sneeze a lot less," one reviewer noted.

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Portable Air Purifier

$59.99

amazon.com

Ideal for spaces under 361 square feet, this Coway option has an LED light that lets you know how polluted the air is in your home. Popular Mechanics editors called it "a great choice if you’re looking for a no-frills portable air purifier that does its job. It works quietly unless it detects a large amount of pollution, in which case it can be louder than a standing fan."

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Mighty Smarter HEPA Air Purifier

$229.99

amazon.com

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