AIRMEGA 400S The Smarter App Enabled Air Purifier

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AIRMEGA 400S The Smarter App Enabled Air Purifier Rated
  • Ease of Use
  • Smart Capabilities
  • Value for Money
  • Reliability
  • Design
  • Efficiency

SHJ Verdict

The AIRMEGA 400S The Smarter App Enabled Air Purifier is innovation done well. It’s powerful while being unobtrusive and easy to use with either your smartphone or Alexa!

Coway shows they’re a reliable company with their top-notch customer service and warranty, so with this smart air purifier, there’s not much to lose besides a stuffy home.

>>> Check current price on Amazon.

The AIRMEGA 400S is a smart app-enabled air purifier, capable of being programmed entirely to suit your needs and produce remarkable results.

This air purifier uses a two-filter system to remove pollutants from the air, leaving you with a cleaner living environment.

airmega 400s review

Having three different cleaning levels and an additional sleep mode, this device is ideal for people suffering from asthma, allergies, or for those who are concerned about the air quality in their direct environment.

Even the cleanest person can struggle to establish strong air quality in the home!

Since COWAY wants to break through on the American market, they provide a high-rate customer service and keep a sharp eye out for any future requests that might appear.

While they have tried to create the best smart air purifier, there are some aspects that cannot be easily corrected. Like most devices of its kind, some noise at the highest setting can’t be avoided.

In the same way, it is hard to state the estimated life expectancy of the filters, since this depends on the intensity of use.

Nonetheless, we’ve gathered all the facts to help you make the best possible decision. Be sure to read on and discover whether this is the smart air purifier for you.

AIRMEGA 400S The Smarter App Enabled Air Purifier: The Details


  • Product Dimensions: 14.8 x 14.8 x 22.8 in.
  • Product Weight: 24.7 lbs.
  • Product Type: Smart air purifier.
  • Compatible with Amazon Alexa: Yes.
  • Area Coverage: Up to 1,560 square feet.
  • App-Enabled for: Android and iOS.
  • Compatible with the following Wi-Fi security settings: Open, WEP, WPA, WPAAES, WPA2AES, WPA2TKIP, WPA2.

How Does it Work

Whether you have an allergy, asthma, or are just concerned about your air quality in general, air purifiers make life a bit easier for everyone.

While we can’t see dust or other particles with our naked eye, they still float around and wreak havoc on our senses.

The AIRMEGA 400S filters these pests out by circulating the air through two fine sieves, trapping impurities and leaving you with clean air.

The overall effect of this type of air purifier is influenced by the size of the room, times of cleansing in one day, and the area you live in.

The following features enhance the functionality of your AIRMEGA 400S: The Smarter App Enabled Air Purifier.

Automatic Mode

Automatic mode is ideal for those who have to run out for an errand often or don’t want to spend a lot of time closely monitoring their air purifier.

In this mode, your air purifier closely monitors the air quality in the room and will shut off if the quality is above a certain value.

AIRMEGA review

In the same way, it will recognize light levels and shut off when the room has become dark. The following sleep mode does filter, but on a lower level which is quieter.

While this mode is perfect for those who don’t feel the need to control air quality themselves, those suffering from severe allergies may choose to keep control in their own hands.

Air Quality Control

Air quality control is the second important ability provided by the AIRMEGA 400S. This feature keeps track of when the air in your room is most polluted and shows what is causing the pollution.

This can provide valuable insights into your own health and the factors surrounding it.

COWAY: The Brand

COWAY was established in 1989 in Korea. Now a little over 30 years old, they are taking a firm stance on the issues of air and water pollution.

They consider these issues to be ‘invisible values,’ and consider keeping people healthy to be one of their main goals.

Their resolve has been rewarded on their local market, netting them several awards including a place in the ‘top 100 best places to work for,’ six years in a row.

Another achievement is their rental opportunities, allowing consumers to rent otherwise impossible to obtain technology for a fraction of the price.

Their presence on the American market has been on the rise steadily for many years. Their mission statement firmly repeats their desire for a world where everyone has access to clean air and water.

Their mission statement includes an excellent customer service that lives up to international standards, as well as a keen eye for future wants and needs that could pop up.

AIRMEGA 400S The Smarter App Enabled Air Purifier

The Positives

Complete Control 24/7

Not only can you choose between an automatic control or not, you can also install a different program to run for every day of the week. This does require you to use the online app, which is a small sacrifice to make.

If you know certain days are tougher than others, you can prepare accordingly.


If you’re going for smart products, you want them to look good and be functional. The AIRMEGA 400S delivers in this aspect with an appearance that, while stylish, is also unobtrusive.

It has a sleek, modern design and comes in white and graphite so it can easily and seamlessly fit into any home regardless of decor.

best air purifier

This, combined with the low noise level, can sometimes lead you to forget it’s even there.

It’s not super heavy to lug around should you need to change its location either. It weighs in at just twenty-five pounds so it won’t be a hassle to move when needed.

Powerful and Efficient 

The Coway AIRMEGA400S will be quick to tell you when there’s a change in air quality no matter the issue. It will alert you as soon as the quality drops and will work to fix it.

Many users noticed a change in air quality within a short while after installing the device, and continued to notice a positive difference as they use it.

It packs a powerful airflow, getting the job done quickly and efficiently so your home always stays clear.

Filters Made to Last

While it’s hard to estimate how long filters last, it is a given that the filters in any COWAY device are made to last for a long time.

With just proper handling, you’ll find that you don’t have to replace these filters often.

And when you do need to change it, there’s no second-guessing. The AIRMEGA 400S has a filter life indicator telling you how much time is left before you need to worry about cleaning or changing your filter.

No Technical Skills Required

While this is a smart air purifier, it doesn’t require you to be tech-savvy.

The basic functions on their own are plenty to keep most people satisfied, while the app connectivity serves to take everything to a whole different level.

smart air purifier

You can set the purifier to your unique preference and let it go about doing its job. Leave it in auto-mode and you’ll barely have to lift a finger!

On that note, you can also connect your AIRMEGA 400S to communicate with Amazon Alexa, so all you need to is speak to it.

If you’ll be out of town for a while or are getting this as a present for someone else, it’s good to know that it still functions well without getting technical.

Customer Service and Warranty

When investing in a product like the AIRMEGA 400S, it’s always nice to know that the company will have your back should anything go awry.

According to their website, all AIRMEGA purifiers come with a warranty that protects customers against any errors in craftsmanship.

This includes one year of coverage for internal parts (except the filter) and five years of coverage for motor and electrical parts.

We should note that this warranty is only available from authorized retailers so be sure to check and confirm before purchasing. The better news? Coway has a customer service department that many have raved about.

They’re known for being helpful and understanding, so in the event that you do need to use your warranty, or just have a concern, you can rest assured they’ll be there to help.

The Negatives

Noise Level Varies

Most testers agreed that, as far as noise levels go, this is one of the quieter air purifiers available, however, some testers disagree.

The loudest noise levels are achieved when you are filtering a large room on an intensive level, while the sleep mode is barely audible.

Since it’s hard to predict individual levels of disturbance, it does rely on how you evaluate your own experiences with background noise.

Dodgy App Connectivity

While the app itself is easy to use, setting everything up requires some patience. This is to be expected with smart appliances, but it is also a point that can be improved on in the future.

AIRMEGA review

Overall Verdict

The AIRMEGA 400S is a very well constructed air purifier that can be completely adjusted to your specific needs.

With a program that can be adjusted from day to day, and with a long lifespan, this air purifier can make a real difference in your life.

It’s certainly the best air purifier for those who would like to be in total control of what’s going on in their home.

While we can’t think of a group of individuals who would be displeased by this air purifier, we do think that people who are more casual in their habits might not reach the full potential of this device.

True technology lovers or those suffering from extreme allergies or asthma, on the other hand, will certainly benefit from this addition to their household.

Where to Buy the AIRMEGA 400S The Smarter App Enabled Air Purifier

Though it’s not their first venture into air purification, Coway has turned many heads with the innovation behind the AIRMEGA 400s.

Both wellness and tech websites have boasted about this smart air purifier’s many features, while customers have praised its performance.

While Coway may be a brand you’re only hearing about in recent news, you’ll be able to find this product both in-store and online.

It’s always best to check department, tech, and specialty shops, but you can start your search by checking out the following online retailers.

And of course, you can also find this air purifier on Amazon.

AIRMEGA review

That’s it for our AIRMEGA 400S review. Are you tempted to give it a try?

Staff Writer

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