SAVE $200: As of Nov. 12, get the Dyson Purifier Big + Quiet for $899.99 at Amazon, down from its usual price of $1,099.99. That's a discount of 18%.
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Dyson Purifier Big + Quiet
$899.99
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$1,099.99
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If you suffer from asthma or allergies, you already know that dust, pollen, and pet dander can make breathing a bit of a nightmare. Keep your air as clean as possible at home with an air purifier, and you can lessen some of that frustration. You don't have to spend a fortune on an air purifier to do a great job, but if you're going to get one, it's worth going all out when you can save some cash on a quality product. Case in point: this Dyson air purifier. As of Nov. 12, get the Dyson Purifier Big + Quiet for $899.99 at Amazon, down from its usual price of $1,099.99. That's $200 off and a discount of 18%.
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The best air purifiers for pet owners
This massive air purifier is for large homes or businesses, as it projects air over 32 feet and can treat bigger spaces than its air purifier brethren. Not only can it purify the air, but it can also detect and destroy any formaldehyde in the air permanently. Formaldehyde is often found in several things, like paint and even tobacco smoke, so it can lurk where you might not expect it. This purifier can help to eliminate it, so even if you're not sure you have it in your home, you can rest assured that it's being removed.This purifier has a HEPA H13 grade filter that's 3.8x larger than its previous generation, and lasts up to 5 years. You can control and monitor the air quality indoors while using this purifier as well with the MyDyson app, set up preset use times, and opt to use several different modes to make things easier for when you're not at home or in the same room. Plus, Breeze mode circulates air to give you the feeling of natural air in your home. If you're ready to take charge of the air quality around you, this is a great pick. Be sure to capitalize on it while it's available at this price. ...
We’ve tested more than a dozen air purifiers that range from $120 to $1,200 — but the most effective method for getting the green light from our air quality monitors is completely free: opening the windows. Of course, seasonal allergies, frightful weather and wildfires can all conspire to make open windows impossible. Air purifiers are your second best option. With sound-muffled fans and multi-layered filters, these simple machines can clear up odors, cooking emissions, dust particles, smoke, pet dander and more. We performed simple at-home tests to compare different models, mostly focusing on...more smart models with app control and auto modes. We compared the features, designs and prices to help you find the best air purifier for your home.
Table of contents
Best air purifiers for 2025
What an air purifier can and can’t do
What to look for in an air purifier
Other air purifiers we tested
How we test air purifiers
Air purifier FAQs
Best air purifiers for 2025
What an air purifier can and can’t do
There are three key categories of air pollution that adversely affect the quality of the air you breathe: volatile organic compounds (VOC), particulate matter (PM2.5 and PM10) and carbon dioxide. VOCs are emitted gasses that can come from cleaners, off-gassing plastics, paint, solvents, fragrances, cooking food and, ironically, air fresheners. VOCs are most closely related to odors you can smell. High levels can irritate your breathing passages, cause headaches and may become cancer-causing over time. Air purifiers with activated charcoal components can help clean VOCs from the air.
Particulate matter is usually discussed as PM2.5 and PM10, with the numbers indicating particle size in microns. This is dust, dirt, mold, smoke and, again, emissions from cooking food. Higher levels of PM can lead to respiratory irritation, allergy symptoms, respiratory infections and potentially lung cancer. Air purifiers that include a HEPA or particle filter can help remove airborne particles from your space.
Carbon dioxide is what humans and pets breathe out. Elevated levels can cause dizziness and lethargy. But no air purifier can reduce CO2 levels because the molecules are so small. Plants can help to some extent, but really the only solution is opening a window or otherwise ventilating the space.
There are no federal standards for air purifiers, but the state of California does require all air cleaners sold in the state to be certified by the California Air Resources Board (CARB). All of our top picks here have met that certification.
What to look for in an air purifier
HEPA filters and other filter types
An air purifier isn’t an overly complicated device. Smart modes and app connectivity aside, they’re not much more than a filter and a fan, which you can certainly DIY. The fan pulls air through the filter to capture particulate matter and other unhealthy elements so you don’t breathe them in. The type of fan can make some difference — it should be powerful enough to pull in air quickly, but also quiet enough on its low speed so it can unobtrusively clean all day long.
Filters, on the other hand, are more varied. Most have two or more layers, typically a pre-filter, an activated carbon filter and sometimes a particle or even a true HEPA filter. The pre-filter is made from a fine mesh that captures big stuff like pet hair and larger chunks of dust. Sometimes this part is separate from the more technical filters — which means you can remove and clean it without needing to swap out the whole thing. For all-in-o...