Buyers Guide & Information

Coway Air Purifier Reviews

Read our unbiased Coway air purifier review and see if this home air purification brand is for you.

Smallest Model

Coway AP-1512HH
Coway AP-1512HH

Top of the Range

AIRMEGA AP-2015E(G) 400S

According to Consumer Reports, investing in an air purifier is totally worth it since “the best ways to improve indoor air are to remove any pollutant sources and ventilate with clean outdoor air.”

This is exactly what an air purifier does, especially products from the highly-rated Coway brand. This Coway air purifier review will give you the complete low-down on the best Coway products so that you can start breathing the cleanest air possible.

Coway Air Purifiers Compared

ModelRoom AreaFilter StagesFilter LifePrice
Coway AP-1512HH361 sq. ft.46 months (Carbon) 12 months (HEPA)Check Sylvane

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Airmega 300S1256 sq. ft.312 monthsCheck Sylvane

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Airmega AP-2015E(G) 400S1560 sq. ft.312 monthsCheck Sylvane

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Airmega 200M361 sq. ft.46 months (Carbon) 12 months (HEPA)Check Sylvane
Coway AP-1216L330 sq. ft.46 months (Carbon) 12 months (HEPA)Check Amazon

Why Choose the Coway Air Purifier Brand?

There are many reasons to choose a Coway air purifier, but with so much competition in this field from companies like Honeywell and Philips, it’s reasonable to wonder why Coway? The following unique brand features are just a few reasons to keep Coway on your radar:

Filtration Technology

This brand’s Airmega products use a Coway air purifier filter called the Max2, which is a combined activated carbon and True HEPA filtration system. These stages of filtering make it possible for each Coway purifier to remove 99.97% of particles that measure 0.3 microns. This includes pollen, pollutants, and other allergens, plus it can reduce volatile organic chemicals up to 99%.

The Coway Mighty purifier takes it a step further by adding in 2 additional filtration stages, including a deodorization filter and washable pre-filter.

Dual Suction

According to Coway, their products utilize a “dual power system that uses dual fans to suck polluted air from both sides of the purifier, cleaning the air faster… Dual power system makes it possible to make the product compact and high efficiency compared to its size.”

Energy Star Certified

Coway purifiers come with a variety of certifications. Not only do they come with an Energy Star rating, but also UL, ETL, and NEMKO stamps of approval.

Real-Time Air Quality Monitoring

This next feature is what sets Coway apart from the rest. All products in the Airmega series are built with a pollution sensor that indicates indoor air quality in real-time. This info is displayed by a brightly colored LED ring, giving updates on how clean or dirty your air is at any time throughout the day or night. It displays 4 different levels of air quality, including:

  1. Good
  2. Moderate
  3. Unhealthy
  4. Very Healthy

Mobile App

Many air purifiers these days come with a compatible app and smart features, and Coway products are no exception. Downloading the mobile app will help you monitor the quality of your indoor air, check up on filter status, set the timer, receive air quality updates, and activate your purifier remotely.

Extra Features

  • Vital Ion
    The advanced Coway air purifier ionizer is a system that generates an electrochemical reaction to reduce the overall number of particles in the air.
  • Smart/Auto Mode
    Coway products come with 3 smart settings, and the Smart/Auto mode automatically adjusts the fan speed according to the room’s current air quality.
  • Air Flow Control
    Most Coways come with 3 airflow control settings to adjust fan speed based on your comfort and purification preferences.
  • Particle Sensor Technology
    This high-tech feature senses when harmful particles are present in the air and kick the purifier into full gear to quickly resolve the issue.
  • Filter Replacement Indicator
    Most air purifiers indicate when it’s time to replace the filter. The Coway air purifier indicator lets you know when each filter needs changing based on how much air it has processed over time.

3-Year Manufacturer Warranty

All Coway products are covered by a thorough manufacturer’s warranty that protects each purifier against defects and normal wear and tear. The company also allows customers to opt for an extended warranty for even longer coverage time.

5 Best Coway Air Purifiers Reviewed

1. Coway AP-1512HH

Our Top Pick
Coverage Area361 sq. ft.
Filtration Stages4
Filtration Life6 months (Carbon Filter), 12 months (HEPA)
Noise Level25 dB (low)
CADR246 (dust)

Out of all the purifiers available from this brand, the most-loved is the Coway Mighty air purifier AP-1512HH. This air purifier has through-the-roof ratings raving about everything from purification performance to overall design. This specific model is designed for rooms up to 361 square feet, making it the perfect addition to large bedrooms and medium-sized living spaces.

The AP-1512HH uses a 4-stage filtration system, including a pre-filter, deodorization filter, True HEPA filter, and Vital Ion filter. Some reviewers aren’t thrilled about the ionization filter since this filtration type has been known to produce ozone, but the amount is minuscule (even the EPA and CARB associations say that it doesn’t do any damage).

The Coway Mighty has an impressive CADR rating, which reflects the volume of air in CFM (cubic feet per minute) that is cleaned of particles of certain sizes. The CADR for dust is 246, for pollen, it’s 240, and for smoke it’s 233. Compared to purifiers from other brands meant for the same square footage, this is extremely impressive.

With the pollution sensor, you’ll receive real-time updates on indoor air quality every minute of the day. It has 3 available fan speeds and an Auto mode that chooses the ideal speed based on the number of particles in the air. The energy-saving Eco mode shuts off the purifier once there has been no pollution detected for half an hour.

On top of that, you’ll also enjoy features like programmable timer, filter replacement indicator, and insanely quiet operation as low as 24.4 decibels. Since this purifier is meant for smaller spaces compared to the other next Coway models we’ll cover, it’s affordable and offers the best value.


  • Great value for the cost
  • Stylish design
  • High CADR
  • Low power consumption
  • Air quality indicator


  • Produces a small amount of ozone


Best Smart Coway Air Purifier
Coverage Area1256 sq. ft.
Filtration Stages3
Filtration Life12 months
Noise Level43 dB (max)
CADR350 (dust)

Purifiers in the Airmega series are meant for much larger spaces than the Coway Mighty model, such as the 300S. This purifier offers the best value for the money if you’re looking to purify an ample space up to 1256 square feet. The “S” stands for Smart, which is fitting since this is one of the smartest purification machines on the market today.

Besides the fact that the 300S can be used for an entire apartment, the smart features make this purifier one of the best from Coway. It’s WiFi-equipped and can be controlled anywhere, anytime, using the Coway mobile app. Like the Mighty, the Smart mode automatically adjusts the fan and filtration speed based on the current air quality.

Any Coway Airmega 300 Smart air purifier review will agree that this purifier is a powerful performer. It monitors air quality in real-time, changes room air up to 2x per hour, and reminds you whenever your dual HEPA air filter needs to be replaced. And the fact that you can control the machine remotely from your smartphone is just an added perk.

The Coway Airmega 300 air purifier is very similar, but this one doesn’t have the same smart features as the 300S. It’s still a solid choice, especially if you’re not interested in high-tech functionality, but most people opt for the 300S since it’s basically the same price. However, the Coway 300 is still a solid choice for energy-efficient air purification.

Getting back to the 300S, this purifier has 5 fan modes (Smart, Sleep, Low, Medium, and High), a pollution sensor, and it operates at a very low noise output (max of 43 decibels). The price is high, much higher than the Coway Mighty, but keep in mind that this device can handle an entire apartment (depending on your space’s square footage).


  • Smart technology


  • High cost
  • Bulky design

3. AIRMEGA AP-2015E(G) 400S

Best Coway Air Purifier for VOCs
Coverage Area1560 sq. ft.
Filtration Stages3
Filtration Life12 months
Noise Level52 dB (max)
CADR350 (dust)

The 400S has a lot going for it. Aside from the fact that this has been deemed the best Coway option for large spaces measuring up to 1560 square feet, it’s most well-known for impressive performance for filtering out volatile organic compounds.

The EPA says that VOCs are “include a variety of chemicals, some of which may have short- and long-term adverse health effects.”

Obviously, you don’t want to breathe these in, and the good news is that the Airmega 400S can help to make sure that you don’t.  In addition to reducing VOCs by more than 99%, this purifier captures pollen, pollutants, and allergens by a whopping 99.97%. This is all thanks to the filtration system that combines a washable pre-filter with Coway’s signature Max2 filter (HEPA and activated carbon).

Just with the 300S, this Airmega model is WiFi equipped and comes with smart features, including compatibility with the Coway mobile app to control the purifier remotely. It’s built with air quality monitoring, a filter indicator, and works with Amazon Alexa and Google Home. Air filtration is fast and efficient thanks to the dual suction design that pulls air in from all angles.

Just like the 300 series, the 400 series comes with an optional non-smart model. The Coway Airmega 400 comes with all the same filtration performance features, but it lacks compatibility with Alexa, Google Home, and the Coway app. It’s still an excellent option for large spaces, but when comparing the Airmega 400 to the 400S, the 400S offers better value.


  • Eliminates VOCs by 99%
  • Large coverage area
  • Easy to set timer
  • Alexa/Google Home compatible
  • Dual suction performance


  • High cost
  • Noisier than other Coways

4. Coway Airmega 200M

Best Quiet Coway Air Purifier
Coverage Area361 sq. ft.
Filtration Stages4
Filtration Life6 months (Carbon Filter), 12 months (HEPA)
Noise Level25 dB (low)
CADR246 (dust)

What if you love all of the Airmega purifiers’ features, but you only need to purify a small space? Both the 300 and 400 models have a 1000+ square feet coverage area, but the  Coway Airmega 200M air purifier is geared towards smaller spaces measuring up to 361 square feet. This is the more reasonable choice for purifying bedrooms, offices, dens, etc.

The design of the 200M is much smaller, which in part explains its whisper-quiet operation. It operates as quietly as 24.4 decibels and never goes above the mid-50s, even on the highest setting. Coway has done an amazing job of combining all the best aspects of the brand’s most popular models, like the easy-to-use control panel with Eco Mode, programmable timer, and optional ionizer.

Although it’s compact, this little guy is a mighty performer. It uses 4 filtration stages to filter out all the bad stuff from your air. The True HEPA filter works to remove tiny airborne particles like dust mites, pet dander, pollen, and mold, while the deodorization filter takes away odors and gases. The pre-filter catches larger particles so that the HEPA filter can do its job more effectively, and the optional ionizer releases negative ions into the air to freshen it up even further.

According to Coway, the 200M helps people with asthma and allergies by capturing airborne particles, including dust, pet dander, and mold that may trigger asthma and allergies…

“Ideal for smokers and those who live with smokers, the Coway Airmega 200M efficiently reduces air contaminants and odors related to second-hand smoke.”

Similar to the Coway Mighty purifier, the only negative feedback is that the ionization filter of the 200M releases a very small amount of ozone. It’s not enough to make an impact, but it’s still a concern for environmental homeowners.


  • Affordable
  • Perfect for bedrooms/offices
  • 4 filtration stages
  • Slim, lightweight design
  • Near-silent operation


  • Produces a small amount of ozone

5. Coway AP-1216L

Best for Allergies
Coverage Area330 sq. ft.
Filtration Stages4
Filtration Life6 months (Carbon Filter), 12 months (HEPA)
Noise Level21 dB (low)
CADR235 (dust)

Last but not least comes the Coway Mighty tower air purifier (model # AP-1216L). Many people are surprised to learn that this small compact purifier can cover an area up to 330 square feet, but it does so without struggling whatsoever. This is thanks to the 4 filtration stages (Pre-filter, Deodorization filter, True HEPA filter, Vital Ion) that filter out allergens, pollutants, odors, and even VOCs.

This purifier has all the same settings and features of the standard Mighty, but the tower design is more appealing to look at. It’s built with Coway’s signature pollution sensor that delivers real-time air quality updates, a filter indicator for both the pre-filter and True HEPA filter, 3 manual fan speeds and an efficient Auto mode, and an Eco mode to save energy whenever possible.

On the lowest setting, the noise output is as little as 21 decibels, and even on the high setting, it will never exceed 52 dB. It consumes less than 50watts, so even with your purifier running consistently, don’t expect to see a spike in your electricity bill. It comes with the standard Coway 3-year warranty for all the electronic parts (1 year for purifier motor).

One of the most common complaints from AP-1216L customers who made their purchase on Amazon is that this purifier does not come with filters included. When you read the product description, you can see that this is very clearly stated, but apparently, many people overlook this. You will need to purchase the filters separately, but this isn’t a big deal considering the low starting cost of the AP-1216L.


  • Low power consumption
  • Auto and Eco modes
  • Compact tower design
  • Very quiet
  • High CADR


  • Filters not included

The Coway Air Purifier Range Explained

The Coway Airmega line of air purifiers caters to many different homeowners. These products can handle both small and large spaces (anywhere up to 1,560 square feet) and use several types of filtrations (including True HEPA and activated carbon).

There are three different lines of purifiers in this series, including 200, 300, and 400 purifiers. The 400 product line is the most advanced and features WiFi capabilities and can respond to Alexa voice commands. All of these products fall between $549 and $749, and Coway has so much faith in what they deliver that they offer a 30-day money-back guarantee.

Who Makes Coway Air Purifiers

Coway Mega was founded in 1989 in Korea and quickly became a global leader in the field of air and water purification. The company employs nearly 5,000 people and has about 2.6 billion in annual sales. They operated in over 40 countries around the world.

Here’s what Coway has to say about what it values most: “Wellness is at the heart of our business philosophy. Since our founding in 1989, Coway has had one overriding mission: to help people live healthier, happier lives.”

Comparing Coway Vs. Similar Air Purifier Brands

Needless to say, Coway isn’t the only option out there when it comes to air purification. It’s normal to compare a Coway air purifier vs. Winix products, an air purifier from Cuckoo vs. Coway, the Coway vs. Philips air purifier series, and Coway vs. Blueair.

To be completely honest, Coway purifiers aren’t the most budget-friendly option available. You’ll see this once you start comparing the Coway air purifier price list to other brands. But this is mainly because Coway believes in putting its customers’ health above all else. And if that means charging a bit more for a filtration system that actually works, then so be it.

People Also Ask (FAQ)

Do Coway air purifiers produce ozone?

This is one of the biggest concerns for anyone shopping for a purifier that’s built with an ionizer since ionization is known to produce ozone. Although Coway purifiers are built with ionizers, even the California Air Resources Board and the EPA say that it doesn’t produce nearly enough ozone to be dangerous (only 0.05ppm).

How do I use a Coway air purifier effectively?

The best way to use your Coway air purifier is to take advantage of the Smart/Auto mode. This advanced feature adjusts the fan speed according to the current air quality of the room, meaning that you won’t have to do any guesswork when it comes to setting the fan speed.

How effective is a Coway air purifier in removing dust, smoke, and pet dander?

Very. In its review on the best air purifiers for 2020, The Wirecutter said that “the Coway Mighty reduced 0.3-micron particulate levels by 98.9 percent in 30 minutes, on both new filters and those that the machine had run on continuously for a year.” Dust, smoke, and pet dander (as well as pollen) fall within the micron level and are all effectively filtered out of the air.

How do I clean a Coway air purifier filter?

The method for cleaning your filter depends on the model you have, but let’s focus on the AP-1512HH (the best-rated Coway available). The first step is to unplug and turn off the air purifier, and then you’ll carefully remove the front panel that protects the filter.

The next step is to remove the filter from the purifier and use a vacuum wand to remove all the large chunks of dirt and debris. Use warm, soapy water to further wash the filter, and once dry, secure it back into place within the purifier.

How do you reset a Coway air purifier?

To reset your Coway, simply hold down the reset button for 2 seconds until the light is deactivated. However, this may vary depending on your model, so refer to your Coway air purifier manual to be sure.


Whether you’re most impressed with the Coway Mighty air purifier review or you’ve got your sights set on the 400 Smart model, the main takeaway here is that Coway is a solid brand for handling your air purification needs. The model you choose is up to you, but you can’t go wrong with any of the Coway purifiers listed here.