Best Air Purifier For

Looking for Relief From Asthma Symptoms?

Are you looking for something that will provide some relief from your asthma symptoms? Do you want to breathe in pure, clean air? With 1 in 13 people suffering from asthma in the US you’re not alone. Many people find that one they have found the best air purifier for asthma then it can really help to alleviate some of the breathing problems. 

Now comes the million-dollar question: Which is the best air purifier for asthma? There are so many products out there, and if you don’t know anything about air purifiers, it may be pretty confusing. Don’t worry. We have got you covered. With the help of this buying guide and the products that we have reviewed for you, you will be able to make a better, informed decision

Filter Selection

Filter system for air purifier for asthma

When you’re looking at air purifiers for asthma, you will notice that they have different features and functionalities. To help you find the right solution for your situation we’ve focussed in here on the different filter types that you’ll find being offered.

a)     HEPA Filters

HEPA stands for High-Efficiency Particulate Air and this type of filter os the most common type you’ll find in good quality air purifiers. Incredibly efficient, they are capable of removing even dust particles from the air. They can trap contaminants as minute as 0.3 microns and have an efficiency rate of 99%.

b)    Carbon Filters

Some filters use activated carbon. These filters are efficient when it comes to removing gases, odors, and other volatile organic compounds from impure air. Even in the natural state, carbon is known for its absorbing properties. After chemical treatment, the “activated” carbon becomes even better at absorbing contaminants.

Activated carbon filters are present in air purifiers that are multi-stage.

c)     UV Filters

The use of Ultraviolet technology is not very uncommon when it comes to air purification, but is not found as much as HEPA filters or Activated carbon Filters. One of the main reasons is that even though UV-C radiation is effective in destroying the contaminants at a cellular level, exposure to UV-C radiation for a long time is not beneficial.

d)    Ionic Filters

Ionic filters are ionic systems that work on electrical properties. With the help of a pair of metal plates, a charge is generated. It is mostly a negative charge. This creates a field to which the contaminants are attracted. It is an effective method and requires very little maintenance. All you have to do is to remove the housing on the plates and clean them off.

e)    Ozone

One of the properties of ozone is that it reacts with the particles present in the air, and render them harmless. This sounds pretty good, but the downside is that ozone is not healthy and overexposure to ozone can result in several health issues. Ozone air purifiers are not recommended for use by asthmatic patients as it can irritate the lining of the lung and cause shortening of breath.

f)      PECO Filters

PECO stands for Photocatalytic Electrochemical Oxidation. It is an advanced technology that is used to purify the air. In this process, light energy is coupled with the compatible filter, and the contaminants in the air are oxidized. Even though it is effective, you will not find a lot of air purifiers which use this technology. There are no harms associated with this technology, but it is relatively new so there are only a few products out there that incorporate this technolog

Our Top Five Choices

Medify MA-18 Air Purifier

Medify Air

The Medify MA-18 is a modern, sleek air purifier that incorporates an H13 HEPA filter that is a medical-grade filter. Additionally, there is both an activated carbon filter and an Anion filter. According to the manufacturer, the anion filter is ozone-free.

The product has a glossy finish and a plastic body that looks and feels premium. There is a large air vent on the front side of the purifier, along with an AQ indicator. A particle sensor, a handle, and an air inlet are present at the back.

The touchscreen control panel is situated on the top along with the ambient light sensor. Additionally, you’ll find the child lock feature along with timer and speed control features.

There are four modes of the timer while there are 3 manual fan speeds along with an automatic mode. The filter life indicator will tell you when you need to replace the filter and we found it very easy to install and replace.

The coverage area of this air purifier is 400 sq. ft/hour, while it’s CADR, is 120 and the noise level being 66 dB. Do consider if this noise level is likely to cause you too much disturbance.

Features & Specs
  • Noise level: 66 dB
  • CADR: 120
  • Coverage Area 470 sq. ft


– Medical grade H13 HEPA filter

– Activated carbon Filter

– Built-in filter life indicator


– No remote control
– Filter replacements are high

2. Blue Pure 211+ Air Purifier

BlueAir Perfect for asthma problemsThe Blue Air 211+ works well with high ceilings and open floor plans. It looks elegant and blends in perfectly with your décor.

There’s a 3-stage filtration system and it comes with two washable filters. The filtration system allows you to breathe air that is free of viruses, dust, pollen, bacteria, mold, and a lot more. This is all combined with an activated carbon system which helps in removing unpleasant odors and VOCs.

The pre-filters are machine-washable and are colorful. On the lowest speed, the noise level of this unit is 31 dB while in the highest setting, it is 56 dB. The product has energy star certification so you can rest assured that your energy bill costs won’t increase drastically. The cherry on the top is that the product is AHAM certified.

Features & Specs

  • Noise Level: 31 dB – 56 dB
  • Coverage Area: 540 sq. ft.
  • CADR: 350 cubic ft/ min

blue Air in room


– Quiet Operation

– Low Energy Consumption

– 3-stage filtration


– Pricey replacement air filters

3. Coway Airmega 300S Smart Air Purifier

Coway Mega helping relieve asthma problems

If you are looking for an air purifier for asthma that you can use in a large space, then you should give Coway AirMega Smart Air Purifier a look. It has a coverage area of 1,560 sq. ft. This is a non-assuming air purifier in design and so blends in perfectly with the interior of your house.

With a combined activated carbon and HEPA filter the should be no problems in providing you with a clean source of air. Then, in addition, you also have a washable pre-filter as well. The entire filtration system keeps you safe from dust, allergens, VOCs, bad smells, and many other contaminants present in the air. The filter indicator tells you when you need to change the pre-filters.

With Energy Atar certification, you can also feel confident that there will be a minimal increase in your energy bills. Additionally, there are 5-speed settings for the fan that include low, medium, high, smart, and sleep. The smart mode has three settings and adapts the output of the air purifier according to the conditions.

It comes with a pollution sensor that gives you the air quality in real-time. When operating at the lowest speed, there is very little noise. Even on the highest speed setting, the noise level is only 43.2 dB.  There is a timer on this purifier with 4 different settings. Moreover, you get a 5-year warranty on the electronic parts and the motor. The filters are not included in the warranty.

Features & Specs

  • Coverage Area: 1,560 sq. ft.
  • Noise Level: 43.2 dB max.

Coway Maxi in room


– Large Coverage Area

– Combined Max2 filter

– Low noise levels

– 5-year warranty on electronic parts


No remote control or access via an app

– Top-end pricing

4. RabbitAir MinusA2 Air Purifier

Rabbit Air

The unique 6-stage air purification process of RabbitAir Minus A2 Air purifier makes it an excellent option when you are looking for the best air purifiers for asthma. It has a true HEPA filter that captures the tiniest of particles to give you contaminant-free air. You can choose between 4 customized filters as well. Additionally, there is a  germ defense filter and odor neutralizer, a toxin absorber, and a pet allergy reducer.

Moreover, the energy star certification renders it inexpensive to use. You can mount the air purifier on the wall or keep it on the floor whichever works best for you and your home. There is a pre-filter, an activated carbon filter, ion generator along with the customized filters and the HEPA filters. Ozone is present in this purifier, but the amount is about 0.002 PPM. The maximum safety standard for ozone is 0.05 PPM.

Features & Specs

  • Coverage Area: 700 sq. ft.
  • Noise Level: 20.8 to 45.6 dBA
  • CADR: 17

RabbitAir in room


– Durable Build

– 5-year warranty

– 6-stage purification


– Not Wi-Fi enabled

5. Medify MA-40W V2.0

Medify MA-40W V2.0

The Medify Air MA-40 has four levels of filtration to purify your air:

  • Pre-filter. This removes hair, fibers, and the large particles such as pet dander.
  • The high-efficiency H13 HEPA filter is next. This has been tested for its ability to remove 99.97% of particles down to 0.1 microns. This medical-grade filter easily catches airborne contaminants you can’t see.
  • Then there’s a carbon filter with carbon pellets. These remove toxic odors, smoke, and also formaldehyde.
  • Finally, there’s an optional anion generator. This produces negative ions to charge particles and trap them inside the unit giving your air a fresh feel.  

Features & Specs

  • Coverage Area: 840 sq. ft.
  • CADR: 300 
  • Noise Levels: Up to 66dB (but quiet setting also available)

Medify in room


-Medical grade air purifier

– Lifetime warranty

– Single cartridge to change all three filters


– Warranty only valid if filters changed every 6 months

– Noisy at maximum settings


Our Top Choice Air Purifier for Asthma

Medify Air 2

The Medify MA-40W V2.0

If you’re looking to make an investment purchase, the Medify MA-40Ws is our top choice. With a lifetime warranty, you have peace of mind that you won’t need to make another purchase or worry if things do go wrong. 

The filter quality is one of the best on the market with many reviews from verified purchasers talking about how it’s made a huge difference to their asthma problems.