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7 Best Air Purifiers for Asthma – (Reviews & Buying Guide 2022)

Asthma can be a real pain for those suffering from this respiratory disease. While you can always use asthma pills and inhalers, you want to have a permanent solution like Air Purifiers.

There are various air purifiers available in the market which makes selecting the best air purifiers for asthma a challenge.

Luckily, this is not something to worry about; you will surely have an easier solution of asthma. Since you are here, scroll down and check out some of the top air purifier for asthma reviews of 2020 that we have compiled for you.

Primarily, in this review we included an explanation of important features to look for, advantages & disadvantages of each asthma air purifier. To find out which one will suit your needs, carefully go through the in-depth descriptions hereunder. 

1. Aeramax 300 4-Stage True HEPA Air Purifier for Asthma Sufferers

fellowes aeramax 300

One of the best air purifiers for asthma you will love this Aeramax 300. It purifies the air through four simple stages.

The first stage takes place in the carbon filter and it involves the removal of large particles.

In the second stage, about 99.97% of airborne particles as small as 0.3 micros are captured and filtered in the True HEPA Filter.

These airborne particles include pollen, ragweed, other allergens, viruses, germs, dust mites, mold spores, pet dander and cigarette smoke.

At stage three, the purifier’s AeraSafe antimicrobial treatment provides built-in protection from the growth of odor causing bacteria, mildew and fungi.

At the fourth stage, there is PlasmaTRUE Technology which creates an ionized field to help with safe removal of airborne pollutants.

Additionally, this Aeramax 300 air purifier is fitted with AeraSmart  sensor that monitors air quality and automatically adjusts the fan speed to keep air purified with minimal noise.

As a result of its CADR rating at 300 cfm, this Fellowes Aeramax 300 is suitable for placement in large rooms of about 300 to 600 square feet. 

Do not worry about sleep comfort while using this device because it operates silently with proper fan setting.


  • Simple to use and maintain
  • Eliminates both tiny and large particles
  • Produces minimal noise
  • Has got high purification performance


  • Not suitable for small rooms

2. Oransi OVHM80 Max HEPA Large Room Air Purifier for Asthma

oransi max hepa air purifier

This is another excellent air purifier for asthma that works like charm is the Oransi OVHM80. It is suitable for large spaces including bedrooms and basements.

This device purifies the air in three stages which involve the Pre-Filter, V-HEPA Filter and Activated Carbon Filter. The Pre-Filter is not only durable. It aids in trapping larger dust particles and can be cleaned by light vacuuming. V-HEPA Filter traps up to 98% of particles and the seal around the filter makes it impossible for air to bypass the filter as opposed to the air cleaners where this is a common feature. On the other hand, Activated Carbon Filter traps smoke, odors and gases.

It is important to note that this Oransi V-HEPA Max air purifier OVHM80 keeps track of air quality and automatically adjusts the speed of the fan if operated in auto mode.

Additionally, this asthma removal air cleaner has got safety certification by the California Air Resources Board (CARB). It also has electronic display alerts plus color coded guides for checking the filters and subsequent replacement of the same.

Do not forget that the filters come with the product as a whole package. This machine’s added advantage is that it has got a coverage of up to 600 square feet with low levels of noise measuring between 1 speed and 4 speed. Besides, there are dust and gas sensors as well as electronic controls with energy star certification.


  • Simple to use because setting up is not complicated
  • Made of very durable materials
  • It is versatile since you can easily move from the living room to the bed room
  • The device can be set for very low levels of noise


  • LEDs cannot be turned off and neither are they dimmable

3. Hathaspace HSP001 - 5-in-1 Smart HEPA Air Purifier

hathaspace smart hepa air purifier

Whether you’re suffering from asthma or allergies and looking for relief or want just to breathe healthy, fresh air, Hathaspace HSP-001 is your purifier

This Smart HEPA air purifier has got 5 in 1 purification system to protect your lungs from harmful indoor air pollutants and all other contaminants. For the record, 99.97% of allergens as small as 0.3 microns are eliminated by this purification system and completely replaces the air in a 350 square feet room up to 48 times per day.

 To begin with, the Nano cold catalyst filter removes larger particles like dust and pet dander as well as toxic household chemical like ammonia and benzene. Next in line is the cellular activated carbon filter of which carbon molecules absorb and remove smoke, odors, gases and volatile organic compounds (VOCs) that are commonly present in household products.

Thirdly, bacteria and germs get targeted by the antibacterial filter. True HEPA filter removes about 99.97% of airborne pollutants in the air as small as 0.3 microns like dust mites, allergens, pollen, pet dander and mold spores.

Finally, Ionizer which is also referred to as Ozone Safe releases negative ions or anions which electrically charge air particles and odors thereby neutralizing them for easy trapping.

Other features worth mentioning about this Hathaspace HSP001 include the Air Quality Sensor for the detection and display of indoor air quality in real-time. There is also the auto mode which gets turned on for the purifier to adjust the fan speed automatically.

 The machine comes with a Remote Control which affords you the luxury of controlling your purifier from the comfort of your couch or from wherever you may be seated in the room.

Lastly, this device can be put on a whisper quiet sleep mode so that you may sleep with no disturbance at all.

This Hathaspace Smart EPA air purifier meets very strict safety standards whereby it fully complies with electrical and ozone requirements as stipulated by the California Air Resources Board.

In a nutshell, this system purifies the air thoroughly, makes breathing easier especially for those with common allergy symptoms like sneezing, coughing and irritated eyes. It can also be controlled to target the most stubborn odors like litter boxes and cigarettes.


  • Filters almost 99.97% of allergens and pollutants
  • Controls unwanted odors
  • Eliminates smoke
  • Remote control which brings about flexibility to control operations
  • Ideal size


  • Lights are very bright
  • The main cable leads are not long enough

4. LEVOIT LV-H133 - Best Budget HEPA Air Purifier for Asthma

Best HEPA Air Purifier for Asthma

Do not compromise on comfort because you want a high performance air purifier for asthma. Instead, go for something that serves your comfort and gives you quality by settling on the LEVOIT H13-grade true HEPA filter air purifier.

With this cost effective machine, you are assured of breathing in air that is free of 99.97% of 0.3 micron airborne particles like dust, bacteria and pollen. Volatile organic compounds, smoke, household plus cooking odors get absorbed by the Activated Carbon Filter. Pet fur and other contaminants are effectively trapped by HEPA air purifier which also reduces pet odors. It also helps to relieve allergies and asthma by capturing dust, pet dander and mold.

The particle sensor detects airborne contaminants thereby automatically adjusting fan speed accordingly. This LEVOIT LV-H133 air purifier affords you a quiet environment because the noise produced is only up to 25Db and so you can rest easy with no disturbance.

You can have a wide coverage in rooms large as 500 square feet to 800 square feet whereby you are assured of fresh air in only 30 minutes. You can also turn off LED display and thus create a darker sleeping environment. This LEVOIT air purifier LV-H133 has got safety certification, energy star and CADR. The filter change indicator lights up to alert you about the need to replace filters every 6 to 8 months.


  • Versatile since it can fit in the living room, kitchen and bed room
  • The machine makes virtually no noise
  • Provision to turn off LED display
  • Auto mode for real-time updates on the quality of air


  • The inconvenience of removing the plastic bag before running the air filter
  • Not suitable in small spaces

5. Rabbit Air MinusA2 SPA-780A - Best Rated Asthma Friendly Air Purifier

Best Asthma Friendly Air Purifier

Are you looking to buy an air purifier for asthma that will fit in a small area or one that you can move around with easily? The answer lies with choosing Rabbit Air MinusA2 SPA-780A which is certified by Asthma and Allergy Foundation of America.

This MinusA2 Rabbit Air uses BioG5 HEPA filtration with six stages of purification as well as deodorization. It also has a custom filter for the removal of odor. The 6-stage air purification process involves a Pre-filter for capturing the largest particles while enabling the other filters to last long.

Second is the Medium Filter which traps large allergens and dust particles. Stage three has BioG5 HEPA Filter which captures very tiny allergens, dust, pollen and mold particles of 99.97% down to 0.3 microns. At stage four is Activated Carbon Filter which eliminates odors and chemical vapors.

Stage five involves a Customized Filter which allows for the customization of a product to suit specific needs. Here, one can choose between enhanced germ defense, toxin absorption, pet allergies or odor elimination.

Finally, the Ion Generator completes the cycle at stage six by creating an iconic field which neutralizes airborne contaminants without producing ozone.

This MinusA2 SPA-780A has got a light sensor which defaults to low energy and dimmed sleep lighting when the room darkens. Last but not least, this purifiers’ Brushless Direct Current Motors operate without producing noise. The machine is energy star rated at 120V or 60 Hz with CADR of 200 cmf for pollen, 193 cmf for dust and 180 cmf for smoke.


  • Easily portable due to its size
  • The ability for fan speeds to go from silent turbo
  • Easy to control digitally


  • It does not show which allergens are in the air

6. Blueair Classic 605 - Alexa-Enabled Smart Air Purifier

blueair air purifier classic 605

Make a perfect choice and pick out Blueair Classic 605 Air Purifier for asthma which is made for large living spaces of up to 775 square feet.

This smart device boasts of patented HEPAsilent technology that uses a combination of electrostatic and mechanical filtration. 99.97% of airborne particles down to 0.1microns in size are captured including dust, mold, dander and pollen. The particles as well as pollutants get electrified when they pass through the HEPASilent electrostatic barrier and so the electrostatic attraction draws them to the filter media like a magnet.

In fact this is the reason why Blueair filters can be more airy. Additionally, Filter-change indicator on the control panel allows you to know when to change the filter. Also, you can select fan speed from the easy to use control panel besides the auto mode which enables you to go for whisper silence; with no emission of light.

Blueair air purifier Classic 605 can stand the test of time because they are made from durable steel bodies and interestingly, they are WiFi enabled. This machine is independently verified by AHAM for Clean Air Delivery Rate – CADR of 500 cubic feet per minute at 775 square to 800 square feet; in such places as large bed rooms, living rooms and kitchens.

Most importantly, the Blueair Classic 605 is energy star rated and certified by California Air Resources Board for no ozone emissions.


  • The use of dual protection filters
  • The luxury of being WiFi enabled
  • 3 fan speeds including the whisper quiet operation which allows for sleep without disruption
  • Easy mobility from place to place


  • Labelling by the use of dust, pollen and smoke in the place of big, medium and tiny for  particle sizes respectively

7. Austin Air B405C1 - Allergy Machine HEGA Air Purifier

Austin Air Allergy Machine

Though listed last, it could as well be the best of all because it is the only air purifier with clinical approval to remove allergens from home and a dramatic reduction of hospital visits for young asthmatic children.

This Austin Air Allergy Machine was developed specifically for people suffering from asthma and allergies. It has got high capacity filtration that removes allergens, chemicals and gases from the air.

Allergens are filtered from the air immediately as a result of its unique design which increases air flow. Ideally speaking, this machine is designed for the relief of sneezing, coughing and stuffy noses which are caused by daily or seasonal allergies.

True medical grade HEPA filter removes 99.97% of all particles larger than 0.3 microns. High Efficiency Gas Arrestance (HEGA) carbon cloth provides a large surface area for absorption of gases, bacteria, chemicals and viruses.

Its 360 degree intake system from the 3 speed fan setting  draws air into all sides of the unit that passes air through a 4 stage filter.

Austin Air HEGA air purifier for asthma reduces night time allergies, asthma attacks, snoring and helps you sleep better. It eases coughing, wheezing, sneezing and also deals with dry mouth as well as running nose while strengthening the immune system. 

This Austin Air B405C1 is suitable even for small spaces and is energy star rated. The filters are very durable and they can last up to 5 years without replacement. It is suitable for both large and small spaces


  • Lessens night time allergies and asthma attacks
  • Strengthens the immune system
  • Eases coughing, sneezing and wheezing
  • Reduces dry mouth and runny nose
  • Reduces snoring
  • Filters allergens from the air immediately.


  • Does not provide for low noise

Factors to Consider While Buying

Apart from the above cocktail of information which borders mostly on functionalities of the mentioned air purifiers, here below is a breakdown of factors to consider while buying the best rated air purifier for asthma.


You should be able to choose the right air purifier based on room area and size of the device.

Energy Star Certification

Energy Star Certification equips you with knowledge about the power voltage of the machine such that even when the same is not readily displayed, you can still feel safe because of the certification from relevant authorities.

CADR & AHAM Certification

CADR are initials for Clean Air Delivery Rate and is measured in cubic feet per minute (cfm). Certification of this is by the Association of Home Appliance Manufacturers (AHAM). It is advisable to choose a product that displays a high CADR. This is because the implication of such a display is that the machine can capture and remove a higher amount of particles.

Maintenance Cost

This hinges mostly on the filters that a machine functions with. A machine for which filters are replaced more often stands out for high maintenance cost.

Filter Type

There are various types of filters which perform distinct functions. There are those that remove particles, smoke and/or Odor. We also have other ones that eliminate chemicals and/or gases. The most common filters include HEPA, Activated Carbon Filter, Antibacterial Filter, Nano Cold Catalyst Filter and Ion Filtration Filter.

Therefore, it is necessary to know the type of filter and the role it plays before buying.

Filter Quality

Quality is determined by performance and a filter that carries a tag of high quality like 99.97 captures of particles means that such a filter is destined to serve its purpose to the fullest. In addition to this, durability or the materials used to make the filters also count for quality.

Filter Life Indicator

You cannot automatically tell the number of particles a machine is removing from the air and neither can you tell the amount of clean air that you are receiving. However, you are advised to go for a purifier which has got along life filter indicator.

Noise Level

Ideally, people prefer a quiet environment for sleep. Therefore, a machine with options for low noise levels is definitely more suitable.

Fan Setting

Some purifiers come with automatic fan settings whereas others have their fans designed for manual setting. The automatic fan setting machines adjust to the desirable levels depending on the surrounding. You may also require knowledge about when to adjust fan settings while using purifiers with manual fan settings. All in all, automatic fan setting purifiers are highly recommended.

How Air Purifiers Ease Asthma

To ease asthma is a process. The purifiers trap small particles especially allergens to filter and sanitize the air. Another effective way is the use of air conditioners for regular cleaning and vacuuming.

How Air Purifiers for Asthma Work

Air purifiers for asthma work through an HEPA filtration system. Although some have five stages, majority work effectively in three stages. The three stages include filtration in the pre filter, activated carbon filter and the advanced filter.

The first stage takes place in the pre-filter and it helps in the removal of large particles such as pollen which affect asthma patients. The pre-filters require cleaning to work effectively for a long time.

The second stage occurs in the activated carbon filter and assists in the removal of smoke and chemical odor. The third stage is where the magic happens. This is because the allergens of as tiny as 0.3 microns become captured and reduced by 99.97% thus leaving the air clean and fresh.

Do I really need an Air Purifier for Asthma? 

If you are an asthma patient then yes you need a best asthma air purifier. This is because these purifiers feature HEPA standards that eliminate even the tiniest allergens which cause asthma attacks.

However, this does not mean that you should not buy an air purifier for asthma if you don't suffer from the same. You should still buy this air purifier for asthma regardless of whether you ail from the disease or not. This is because our homes remain trapped with pollutants that can cause other respiratory illnesses and allergies which can affect breathing.

Why should I buy air purifier for asthma?

There are various reasons. Firstly, these air purifiers for asthma have got high performance rates in terms of filtration. This means that they are effective in trapping and removing allergens to leave you with clean and fresh air.

Secondly, these air purifiers are made of quality material. As a result, their filters are built to last and will serve you for long.

Thirdly, these devices are convenient for using at night. This is because they have got auto mode which turns the fan settings on low mode so as to function silently with no disturbance to your sleep.


After reading our in-depth reviews of air purifiers for asthma & buying guide, we have got no doubt that you are now knowledgeable enough to make an informed choice of the most ideal one.

We cannot over-emphasize the need for you to consider all the necessary factors outlined herein before making a choice.

Above all, note that it is not just about any other person’s choice. Instead, it is about your needs and suitability of the machine from our recommended list of the best seven air purifiers for asthma.

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