The 8 Best Air Purifiers for Allergies of 2021

Keep your environment clean to protect your health

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First Look

Best Overall: Levoit LV-PUR131 Air Purifier at Amazon

"Purifies air and removes odors with a three-step filtration unit that’s also EnergyStar-approved."

Best Budget: RENPHO RP-AP088W Air Purifier at Amazon

"Ultra-effective and budget-friendly."

Best High-End: Molekule Air Purifier at molekule.com

"Uses nanotechnology to filter out small particles."

Best for Small Rooms: Levoit LV-H132 Air Purifier at Amazon

"Compact and powerful unit for your bathroom counter or nightstand."

Best with Humidifier: BONECO Air Washer W200 Humidifier & Purifier at Amazon

"This unit does double-duty, using the evaporated water it adds to the air to reduce impurities."

Best Smart: Hathaspace Smart True HEPA Air Purifier at hathaspace.com

"In auto mode, this purifier will change its fan speed based on the air quality readings taken by its smart sensor."

Best for Pet Allergies: Germ Guardian True HEPA Filter Air Purifier at Amazon

"Banish pet hair, dander, and germs with this purifier that excels at trapping the particles that can make you sniffle and sneeze."

Best for Asthma: PARTU HEPA Air Purifier at Amazon

"Completely ozone-free, this purifier eliminates asthma-triggering particles and odors from the air."

Spring and fall allergies are pretty common thanks to pollen and leaf mold, but if you feel like your personal allergy season extends well into summer and winter, too, you might not be dealing with just seasonal allergies. You could be suffering from environmental or indoor allergies as well, caused by everything from dust mites and insect droppings to mold and pet dander. If that’s the case, you may want to spring for an air purifier to improve the air quality inside your home. Before you dismiss it as a luxury purchase, know this: ignoring your ongoing allergies may cause bigger problems later on.

“Uncontrolled allergies can lead to developing asthma,” says Kathleen Dass, M.D., a Michigan-based allergist and immunologist. “While most studies are usually small, the evidence does show improvement in allergic rhinitis with [air purifiers containing] HEPA filters.”

Sounds easy enough, but one internet search of air purifiers is enough to make your head spin. There are a lot of choices—each one boasting more “necessary” features than the next—and it can be hard to know which one is right for you. Don't worry, we’ve simplified the search process: here are the nine best air purifiers for indoor allergies to keep you free of sniffles all year long.

Here are some of the best air purifiers for allergies on the market.

Best Overall: Levoit LV-PUR131 Air Purifier

Levoit LV-PUR131 Air Purifier

 Courtesy of Amazon

Made to work best in rooms up to 360 square feet, this unit has three fan speeds to accommodate the level of purifying you need. It also features a sleep mode, auto mode, and timer; the sleep mode allows the unit to run more quietly and with less LED display light, while the auto mode will shift between fan speeds according to how much purifying is needed in the room.

Levoit says its 3-stage filtration process using a HEPA carbon filter can remove 97 percent of common household allergens. It’s also received a decent EnergyStar rating, requiring only about $12 to $15 to run every year.

Best Budget: RENPHO RP-AP088W Air Purifier

Cleaning all the airborne junk from your living space is a tall order, and it often requires an investment in a quality device to really get the job done. But not everyone has hundreds of dollars to spend on an air purifier to help with their allergies, which is why we like the RENPHO option.

With four stages of filtration, including a HEPA filter, a whisper-quiet sleep mode, and the ability to circulate air around a 240-square-foot room three times per hour, you really can’t argue with this model’s budget appeal. It also comes with three fan speeds, two light options (night light and rainbow gradient), and a timer/auto shutoff option.

Best High-End: Molekule Air Purifier

Molekule

Made to work in large spaces up to 600 square feet, the Molekule air purifier pulls in air from every direction, working on a 360 degree spectrum. It’s quiet, portable, and ozone-free. It features a proprietary filter that uses nanotechnology (Photo Electrochemical Oxidation, or PECO) to remove impurities at the molecular level, as well as smart technology, making it compatible with iOS and Android systems for remote operation. 

It’s an investment for sure, but Molekule also offers a 30-day trial period, full refunds, and a monthly payment plan. If it makes your life easier, you can also sign up for automatic deliveries of replacement filters (for an additional cost), making this a product you can purchase, plug-in, and forget about.

Best for Small Rooms: Levoit LV-H132 Air Purifier

This Levoit unit is compact but powerful, small enough to fit on a counter or nightstand and efficient enough to circulate the air around a 129-square-foot room four times in one hour.

Just because it’s petite doesn’t mean it doesn’t pack a punch: this purifier cleans just as well as Levoit’s larger units, removing more than 99 percent of household allergens like dust, mold, dander, and smoke. It has a HEPA filter and is ozone-free, making it safe for use with asthma sufferers.

Because smaller units like this are often used in bedrooms, Levoit has outfitted this purifier with a night light option and an ultra-quiet motor so it will help—not hinder—your beauty sleep.

Best with Humidifier: BONECO Air Washer W200 Humidifier & Purifier

BONECO Air Washer is a powerhouse unit that evaporates water into vapor, adding moisture to the air, then uses that water as a filter to naturally clean the air in your living space. The Air Washer is designed to eliminate large particles, so while it may not filter out things like pesky odors, it’s suitable for dust and pollen.

On the technical side, the BONECO unit has both daytime and nighttime operating modes for maximum efficiency, dishwasher-safe parts for regular cleaning, and even a diffuser port for adding your favorite essential oils to really freshen your space. 

Best Smart: Hathaspace Smart True HEPA Air Purifier

Hathaspace

The Hathaspace Smart Air Purifier is not only operable with a remote, it actually has the computer brains to detect air quality and adjust itself accordingly. Using a smart sensor, this unit takes continuous readings of the air quality in the room it’s in. In normal mode, you can observe the data and change the settings on your purifier; in auto mode, though, the purifier will change its own fan speed as needed based on the air quality readings. 

Elsewhere, the Hathaspace purifier features a five-step filtration system (including an ionizer and a HEPA filter) powerful enough to remove up to 99.97 percent of allergens, trap dust, pet hair, and dander, and eliminate annoying odors. 

Best for Pet Allergies: Germ Guardian True HEPA Filter Air Purifier

For pet owners, an air purifier like the Germ Guardian is a great way to cut back on the amount of pet hair and dander floating around in the air and landing all over the floors and furniture. The hardworking filtration system traps both large and small particles, like dirt, hair, dander, and dust, while also eliminating common pet odors. Its UV-C light kills airborne bacteria and viruses, meaning it will not only reduce the amount of germs in your home thanks to Fido’s romp in the mud, it can also keep your home healthier during cold and flu season.

What’s more, the unit has been tested for energy efficiency and against the clean air delivery rate (CADR) system, receiving high marks in both metrics. Basically, it not only cleans the air well, it does it quickly, reducing the amount of time you’ll need to keep it running for relief.

Best for Asthma: PARTU HEPA Air Purifier

If you’re an asthma sufferer, you know there are a million different things that can trigger your symptoms—pets, weather changes, bad smells, illness, and seasonal allergies, among others. Using an air purifier can definitely help reduce asthma attacks and overall symptoms, but you need one that contains a HEPA filter—and the ability to work against multiple environmental instigators.

“If you have asthma that is triggered by scents or cigarette smoke, an air purifier that can filter out these smells will be more beneficial,” says Dr. Dass.

The PARTU HEPA Air Purifier checks a lot of the necessary boxes: it features a three-stage filtration system that captures small allergen particles and small air pollution particles, can alleviate seasonal as well as chronic allergy symptoms, and eliminates asthma-triggering odors like cigarette smoke, household cleaners, and cooking smells. It gets consistently high ratings online, with many reviewers noting that the air in their home smells noticeably cleaner (and that they’re breathing much easier). 

Final Verdict

Levoit takes home more than one superlative when it comes to well-rated and highly functional air purifiers; you get a lot of bang for your buck with the standard Levoit PUR131 unit we chose as best overall. If you’re looking for an affordable, quality purifier, we recommend the RENPHO for its efficient, four-stage filtration process.

What to Look for in Air Purifiers for Allergies

HEPA Filtration

HEPA stands for high-efficiency particulate air, and Dr. Dass says that purifiers with HEPA filters have been the most extensively studied—and the only kind proven to filter particles out as small as 0.3 micrograms. That makes them one of the best tools in combating the effects of indoor allergens. 

Size

When we’re talking about size for air purifiers, we mean the square footage the device can cover and clean the air around you. If your device only covers a small space within a large room, it's not doing the job you need it to in order to remove allergens. Air purifiers have a clean air delivery rating (CADR), which indicates how efficient the device is at cleaning the air. “The AHAM (Association of Home Appliance) says ‘that as a rule of thumb, the CADR of your air cleaner should be equal to at least two-thirds of the room’s area,’” says John McKeon, M.D., CEO of Allergy Standards Limited speaking on behalf of the asthma and allergy friendly Certification Program for the AAFA. 

UV Ionization

Some air purifiers are electrically-charged, or ionized, with UV technology to further clean and sanitize the air. This is a feature that some people benefit from, but others—like those with asthma—should avoid these types of purifiers, says Dr. Dass: “They have been shown to create an ozone [which] can actually trigger or exacerbate your asthma symptoms.” 

Why Trust Verywell Health?

Sarah Bradley has been writing health content since 2017—everything from product roundups and illness FAQs to nutrition explainers and the dish on diet trends. She knows how important it is to receive trustworthy and expert-approved advice about over-the-counter products that manage everyday health conditions, from GI issues and allergies to chronic headaches and joint pain.

Additional reporting to this story by Danielle Zoellner

As a seasoned health writer, Danielle Zoellner knows the importance of finding just the right product to fit your medical needs. Throughout her career, Danielle has interviewed a variety of experts in the medical and health fields while reviewing dozens of products. Her experience and knowledge in the field work together to help readers like yourself find the best products for your daily life.

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