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Should I buy an air purifier for my asthma and indoor allergies?


Should I buy an air purifier for my asthma and indoor allergies?

Attention asthma and allergy sufferers! Has your doctor suggested buying an air purifier for your house to help reduce asthma and allergy symptoms? Here are some Q & A to assist you.

Q: What is a HEPA air cleaner?

A: HEPA stands for “High Efficiency Particulate Air.”  Basically, HEPA is a type of filter that traps a large amount (99.97%) of very small particles— as small as 0.3 microns.  For size comparison, the period at the end of this sentence is about 400 microns in size!  The size of pollens (30 microns), dust mites (20 microns), animal dander (1-20 microns) can be captured, but only if the air in the room is passed through the filter.  HEPA air cleaners are believed to be the most effective, especially when compared to electrostatic or paper filters.  Most vacuum cleaners would simply recirculate these very small particles back into the air of your home.

Q: Where can I find one?

A: There are many good options including Blueair® at, Hunter PermaLife™ at, and MinusA2™ at .

Q: How much do they cost?

A: HEPA air cleaners have a wide price range, primarily depending on features such as Clean Air Delivery Rate (CADR), which is the amount of particle-free air being delivered into the room.  The higher the CADR, the larger the size room that can be cleaned of airborne particles.  Other features that some HEPA air cleaners have are casters and digital remotes—nice, but not necessary.  The number of air changes per hour is also important.  The more air changes, the more particles removed from the air.  Remember that most air cleaners are advertised at the highest air speed.  With high air speed, the fan generates more noise. Eight or more air changes per hour may decrease airborne levels by 90% or more.  This factor is most important for the allergic patient.   So, back to price—they range anywhere from $350 to $900 (not including replacement filters).

Q: Do they work?

A: Yes, but air cleaners alone without using other measures to decrease airborne allergens and irritants may only be partially effective in improving symptoms of the patient with allergies or asthma. Some air cleaners are certified by the Allergy and Asthma Foundation of America (AAFA) in partnership with Allergy Standards Limited (ALS), which is “an independent program created to scientifically test and identify consumer products that are more suitable for people with asthma and allergies. The Certification Program has included certifying air purifiers in order to address some of the contaminants that may be present in indoor air and to scientifically validate that air cleaners contribute to the goal of allergen reduction.”   It is best to avoid air cleaners that generate ozone, as this gas can exacerbate asthma. No air cleaner can eliminate all hazardous contaminants of second hand tobacco smoke.

So get out there and breathe that clean indoor air!

This educational information does not take the place of your physician’s advice.

  1. Erin SuttererErin Sutterer02-01-2013

    Great info! Definitely will take this into consideration when looking for the right air filter. Thank you!

    • write my paperwrite my paper03-31-2017

      I’m just convinced that this is a very useful and useful purchase that can make your life much easier and easier.

  2. CraigCraig04-13-2014

    These are some good Q and A’s on air purifiers. It might also be good for your readers to know that there is a huge difference between “true-HEPA” and “Hepa-type or Hepa-grade” air purifiers. True-HEPA is the best air purifiers because it is certified to capture particles .3 microns in size. The other two HEPA types can only capture 2-5 microns in size or larger, which is a big difference.

  3. JamesJames04-14-2014

    Great info for people looking to put an air purifier in their house. Just to follow up on the HEPA comment… its important for consumers with asthma to get a “true-HEPA” filter device. This removes particles as small as .3 microns in size. A lot more toxins are eliminated that with a HEPA-grade or HEPA-type filter.

  4. AliceAlice03-22-2015

    I also would like to add that one should stay completely away from Ozone purifiers. These devices have been reviewed by the EPA to be detrimental to health.

  5. Yes, It is wise worthy using air purifier. They can clean your living environment air and you would get pure air.

  6. airbetterairbetter09-19-2015

    Nice article, these air purifiers are a real revolution

  7. AnnaAnna09-20-2015

    Thank for sharing ! It clean your living environment air and you would get pure air.

  8. Magan CarrilloMagan Carrillo11-20-2015

    I am ready to buy an Asthma protected air purifier. Your writing is very helpful to me. Thank you.

  9. AdyAdy06-06-2016

    I think reading the customer reviews before buying the product may certainly help as well.

  10. MarkoMarko04-19-2017

    My suggestion is to read a lot of reviews, you can find it on Amazon, or on some relevant sites that provide reviews.

  11. J DavidsonJ Davidson04-30-2017

    Great information! I think that air purifiers for asthma and allergies are a fantastic way to help manage your symptoms. Thanks for sharing!

  12. John WillJohn Will07-20-2017

    I like the advanced filtration system and how it absorbs odor!

  13. Helpful post, I think air purifiers work to keep your home’s climate healthy by removing polluting particles like dust and pollen. Thanks for sharing.

  14. James BurtonJames Burton01-22-2019

    Yes. Air purifiers are worth their money. I would recommend choosing air purifiers with washing filters, so you can save money

  15. Tyler JohnsonTyler Johnson06-24-2019

    That’s good to know that you could trap almost 100% of the particles in the air with one of those filters. I would think that would definitely help reduce the amount of pollen and other allergens that are coming into your house. I’ll have to consider getting one of those and see if it could improve my asthma.

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