Are you asking the question, “Do air purifiers work for allergies?”

In this post, we’ll answer that exact question so you can find out will an air purifier help with allergies or not.

There are more than 50 million people just in the U.S. that suffer from nasal and respiratory allergies and it’s the 6th leading cause of chronic illness.

We’ll first start with the short answer to give you a glimpse of what’s ahead, then we’ll move onto the detailed explanation so you can fully understand what your best options are for getting relief.

Do Air Purifiers Work for Allergies?

Do air purifiers work for allergies

A 2018 study found that a HEPA air purifier in a bedroom worked to improve the symptoms of allergic rhinitis. It did this by reducing the concentration of particulate matter and house dust mites in the air. The people using air purifiers with HEPA filters noticed that allergy symptoms decreased significantly.

An air purifier can help with allergies best when it uses a True HEPA filter. This filter is the only kind that can remove 99.97% of allergens as small as 0.3 microns in size which includes pollen, mold spores, pet dander, dust, and other microscopic allergens.

If this is what you’re looking for, you can check out our review of the best HEPA air purifier for allergies.

As for what are HEPA filters made of to make them so efficient, the secret is an interwoven mesh of fibers made out of glass or plastic. This design allows air to flow through while trapping microscopic pollutants.

See all of Amazon's Best Selling Air Purifiers

What Triggers Indoor Allergies

Before we answer the question about can air purifier help with allergies or not, it’s good for you to know what may be triggering your indoor allergy symptoms.

Not all allergies are caused by the same thing(s).

Some people have a hypersensitivity to one type of allergen while others are aggravated by multiple particles inside the home.

Those most common indoor allergy triggers include:

  • Pollen
  • Mold and Mildew
  • Dust and Dust Mites
  • Tobacco Smoke
  • Pet Dander
  • Volatile Organic Compounds (VOCs) – which are present in carpeting, furniture materials, paints, glues, and cleaning agents
  • Insects

Since these things are found in virtually every home, it makes sense why so many people experience year-round allergies.

Additionally, these particles can’t be seen by the naked eye and it’s often hard to tell which one (or more) is the root cause of your allergic reactions. Therefore, it’s best to protect yourself against exposure to all types of allergens and not take any chances.

So, can an air purifier help with your allergies? We’ll tackle that question next.

Will Air Purifiers Help With Allergies?

The problem with indoor allergens is that they float around your home and eventually make their way into the carpet, bedding, drapes, upholstery, and your clothing. And every time you walk across your floor, lay down, or disturb one of these areas, it sends the trapped allergens back into the air for you to breathe in.

That’s why your allergies often flare up out of the blue.

The good news is that the best air purifiers can give you relief for your symptoms.

If you choose the right air purifier, it can clean your home’s air of a large portion of the allergy triggers we mentioned above. These devices can also get rid of odors which are another thing that can irritate your sinus and respiratory tracts and make you feel worse.

However, there are some things you need to keep in mind before making a purchase.

Not Just Any Air Purifier Will Do

The truth is that not all air purifiers are designed the same and not all are great at helping with allergies as we mention in our guide on what do air purifiers do.

In fact, if you don’t buy the right kind of air cleaner, you won’t experience any allergy relief while at home.

The secret to getting the best air purifier for allergies is to find one that’s equipped with a True HEPA filter. This filter is specially designed to catch and trap 99.97% of microscopic allergens down to 0.3 microns in size. That’s 7x smaller than a human hair.

Even the best air purifier with washable HEPA filter cannot trap pollutants that small. So it’s best to get an air cleaner that uses a replaceable filter for the highest efficiency.

Additionally, there are ionic air purifiers on the market that claim to remove airborne allergens. However, in our article on how do ionic air purifiers work, we explain that these units can effectively remove most allergen particles but they’re not as efficient as True HEPA air purifiers which lock the particles into a dense filter material.

Air Purifier Size is Also Important

Just buying an air purifier with a True HEPA filter is not enough.

You need to make sure that the device is sized correctly for the room you want to use it in. If the air purifier is not powerful enough, then it won’t be efficient at removing indoor allergens and you’ll still feel awful at times.

To get the right size air purifier, all you have to do is figure out the square footage of the room you’ll be placing it in and match it up to a product that will cover that size space. Most manufacturers list this room coverage rating on the device so you can quickly determine if it’s the right fit.

Below are the basic steps for how to choose the right size air purifier.

Finding Square Footage of a Room

Simply measure the length and width of the room. If it ends up being an odd length, round it to the nearest whole number. Then, multiply these two numbers together to get the total square footage.

For example, if you have a room that’s 31.7 feet long by 26.2 feet wide, you would round these numbers up to 32 feet long by 26 feet wide.

Multiplying those two numbers together (32 x 26) gives you 832 square feet.

When you’re shopping for an allergy air purifier you want the device to be able to handle at least this size or larger. That way you’ll know it can remove the most amount of allergens from the air.

One Air Purifier May Not Be Enough

Another thing you’ll want to keep in mind when buying an air purifier is the fact that it will only work in the room you have it running in. Air purifiers can’t purify air through walls.

For example, if you have an air cleaner in your living room then you’ll get allergy relief in that space. But if you go to your bedroom and you don’t have an air purifier in that area then your allergies could become worse while you sleep.

Ideally, you want to have an air purifier in each room of your home that you spend the most time. For most people, this is the living room and bedroom. If you severe allergies and spend a lot of time in an office or basement as well, then you’ll want to consider putting an air cleaner in those locations too.

The bottom line is the more rooms you have an air purifier in, the more relief you’ll get from your allergy symptoms throughout your entire house.

How Do You Find a Good Air Purifier for Your Allergies?

Now that you know will an air purifier help with allergies and what the most important features are to look for, you’re probably wondering which products are best made for allergy relief.

If you’d like to find out what your options are for general allergy concerns, then check out our review of the best HEPA air purifier for allergies.

If you’re a pet owner or live with someone who has pets, and cat or dog dander is give you trouble, then check out our best pet dander air purifier reviews to find a good unit for this particular purpose.

Summary – Can an Air Purifier Help with Allergies?

The answer is yes, as long as it meets certain criteria. Heres’ a recap of what you learned in this post:

  • Air purifiers are a great way to reduce indoor allergy triggers.
  • To remove 99.97% of allergens, the air purifier must use a True HEPA filter.
  • The air purifier must be sized properly so it can cover the square footage of the room you want to use it in. Otherwise, it won’t be as effective.
  • For the best allergy relief, you’ll want an air purifier in every room you spend a lot of time in (i.e. living room, bedroom, basement, or office).

Now you know the answer to the question, “Do air purifiers work for allergies?”

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About David Morrison

David is an Air Quality & Comfort Technician. He has expert knowledge on the technology and design of air purification, air conditioning, and heating systems. His main role is to write content that helps people get the most value out of their air purifiers, air conditioners, and heating units. (See Full Bio)