Best Air Purifier for Asthma

Indoor air quality is much lower than the outdoors. If you have asthma an air purifier can immediately improve your quality of life.

Our experts at Indoor Air Quality Guides have done all of the in-depth research and testing on air purifiers so you don’t have to.

“While many air purifiers are good for dust, pollen, mold, smoke, and pet dander, it can be hard to know which model to choose,” says Joe Sanders, lead indoor air quality specialist. “So we made the most detailed list of the best air purifiers you can trust to help you breathe easier.”

When it comes to asthma, an air purifier can immediately reduce the triggers in your home.

Disclosure: At Indoor Air Quality Guides, we want you to find the best air purifier for your needs. All opinions expressed are of our owned and not influenced by the manufacturer. As an Amazon Associate, we may earn income from qualifying purchases made through the links below. We’ll get a small commission that supports our work. We hope you enjoy this free guide and find the best air purifier through our recommendations.

Best Air Purifiers for Asthma (At a Glance)

In a hurry? Here’s a glimpse of the two best products you can get.

You’ll find out more about these air purifiers in the detailed reviews and buying guide below.

Honeywell HPA300 True HEPA Allergen Air Purifier

Honeywell HPA300 3-in-1 Air Purifier

Rabbit Air MinusA2 air purifier

Rabbit Air MinusA2 Air Purifier

Why Our Homes Make Asthma Worse

Did you know that 300 million people around the world suffer from asthma? Or that on average, 10 American citizens die everyday from asthma related conditions?

Alarmingly, the indoor air quality  is 2-5x worse than outdoors, according to the U.S. Environmental Protection Agency.

These statistics can be scary for asthmatics but an air purifier can immediately help out.

Asthma can be triggered by many things such as:

  • Infections like sinusitis, colds, and flu
  • Allergens such as pollen, mold, pet dander, and dust mites
  • Irritants like strong odors from perfumes or cleaning solutions
  • Air pollution
  • Tobacco smoke
  • Exercise
  • Cold air
  • Change to the humidity

The major health issue is that indoor air quality is in a steady decline. One of the causes for this due to the way new homes are being built. They are designed to be efficient as possible so homeowners don’t need as much air conditioning or heating. The increased efficiency is achieved by creating tight seals throughout the entire home.

Now, you may be thinking..

How does a tight seal in my home create problems for my asthma?’

Once harmful pollutants enter your home through your clothing or through open doors they no longer have ways to freely escape outdoors again. It is important to have air exchange inside your home.

That build up of contaminants/particles results in homes becoming a breeding ground for asthma triggering particles that continue to cycle in and out of your lungs.

Fortunately, there is an effective solution for this. An asthma air purifier for your home.

How Does An Air Purifier for Asthma Help?

An air purifier is good for asthma because cleans the indoor air of any particles or allergens that may trigger your asthma.

By creating fresh air you’ll notice an immediate improvement on your health.

You’ll be able to breath deeper, feel better and have less asthma attacks.

However, buying the wrong type of air purifier can actually make your asthma worse.

There are two major types of air purifiers on the market:

  • Ionizers (or ionic air purifiers)
  • HEPA air purifiers

AVOID Ionic Air Purifiers

Studies have shown that the negative ions released by ionic air purifiers can make your asthma worse and may trigger asthma attacks.

What you need for asthma is a HEPA air purifier

HEPA air purifiers use a highly dense paper filter to collect pollutants that irritate your asthma.

The best type of HEPA air purifier for asthma is one with the True HEPA filter.

A True HEPA filter guarantees removal of 99.97% of particles as small as 0.3 microns in size. Other HEPA filters don’t have this certification and may or may not do the job.

In conclusion, if you have asthma then your best bet is to look for a True HEPA Air Purifier.

Honeywell HPA300

Best Air Purifier for Allergies

The Honeywell HPA300 True Allergen Remover Air Purifier is the #1 recommended by allergists.  It has 5 air changes per hour, 4 cleaning levels and easy to use touch controls.

Room Coverage – Recommended for extra large rooms up to 463 square feet

True HEPA filter – captures up to 99.7% of allergens such as smoke, pet dander, dust, dust mite debris and pollen. Can also help reduce certain airborne germs: viruses, bacteria and mold spores.

Replacement costs – $36.99 every six months. Air purifier has an indicator to show when filter needs to be changed.

Warranty – 5 year warranty

For a more in-depth analysis, visit our detailed review page of this air purifier.


+ Best value

+ Great performance and fan power

+ Best air purifier for allergies


not great for odor

– quite noisy

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Rabbit Air MinusA2

Best Overall Air Purifier

We consider this the best home air purifier system available due to its wide range of features and air cleaning power. The Rabbit Air MinusA2 air purifier offers a remarkable 6-stage air purification process that creates the cleanest, freshest air possible. This includes:

  1. Pre-filter – To capture the largest particles and prolongs the life of the other filters.
  2. Medium Filter – Traps large allergens and dust particles.
  3. BioGS HEPA Filter – Extra-long life version of a True HEPA Filter that captures the tiniest of all allergens, dust, pollen, and mold particles (99.97% down to 0.3 microns). Lasts up to 3 years which is 3 times as long as any other filter on the market.
  4. Activated Carbon Filter – Eliminates household odors from pets and cooking and chemical vapors.
  5. Customized Filter – You can customize this filter based on your specific needs. Choose between enhanced germ defense, toxin absorption, pet allergies or odor elimination.
  6. Ion Generator – Creates an ionic field to neutralize airborne contaminants without producing ozone.

Room size coverage is also excellent at 700 square feet, which covers most areas in the home. If you can afford it, however, we highly suggest that you invest in the best air purifying machine.

Annual replacement cost: $85

Warranty: Keep your air purifier protected with an industry-leading 5-year warranty, free shipping within the contiguous US, and lifetime 24/7 technical support.

For a more in-depth analysis, visit our detailed review page of this air purifier.


+ Wall mounted and customizable front panel can let device appear as art inside of a room

+ Long lifespan filters

+ Great filtration capability in removing contaminants


one of the more expensive options but worth it if you can afford it

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Levoit Core 300

Best Affordable Air Purifier

Levoit Air Purifier is the best air purifier for mold

The Levoit Core 300 air purifier is Amazon’s top selling HEPA air purifier.

Improved Filtration: The HEPA filter works with ultra-fine pre-filter and activated carbon filter trapping 99.97% of fine particles as small as 0.3 microns and large pollutants such as pollen, dust, pet dander and smoke.

Most Silent Air Cleaner: The noise level is nearly silent at sleep mode with only 24db.

Energy Star Verified and holds one of the strictest certifications with California air resources board (CARB) for indoor cleaning devices.

Room coverage – for medium rooms up to 215 square feet.

CADR Rating (Dust/Pollen/Smoke) – 141 / 140 / 145

Replacement filter costs – $19.99 per year

Warranty – 1 year

For a more in-depth analysis, visit our detailed review page of this air purifier.


+ Most silent air purifier

+ “Energy Star” Certified

+ Small and effective


Night light can be irritating at night

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