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The unhealthy air in your home can affect your health and your quality of life. You’re smart enough to know this, which is why you are here hoping to find the best HEPA air purifier you can get. I spent 30+ hours with the AIRMEGA 400S App Enabled Air Purifier to find out if it will make your home’s air healthier and your home a happier place.

The AIRMEGA 400S App Enabled Air Purifier has two industrial-grade HEPA filters to filter environmental toxins, is an economical choice and it’s a fairly quiet unit as well. There’s a lot to like here, but does it improve indoor air quality? Read my review below to find out how I felt about it after many hours of use.

Is The AIRMEGA 400S Air Purifier Worth It?

The Coway AIRMEGA 400S has all of the right features for cleaner air in your home. The company even went above and beyond the call of duty, by making it aesthetically pleasing for your living space. It can also be controlled via a mobile app for added convenience.


  • Great design
  • Large room coverage
  • Smart app features


  • Replacement filters are expensive
  • Many users don’t like the app

Build Quality And Design

Coways AIRMEGA 400s is solidly built and sturdy, but the most obvious thing is how pleasing it is to the eye. The AIRMEGA 400s air purifier will look good in any room. It has a multicolored light ring on the front to indicate realtime air quality as well, which adds to the design. Even the electrical cord has a two-tone fabric. It is lovely.

Room Coverage

This Coway air purifier will handle a large room since it is rated to cover 1560 square feet. That’s more than enough for most of our bedrooms and even most living rooms, while still being able to remove all of the dust pollen, volatile organic compounds, and other nasty particles from your indoor air.


This model has two industrial-grade (H13) HEPA filters. The 400S also has a Smart Mode that adjusts purifier performance based on your air quality, and a differential pressure sensor that detects filter performance and alerts you when you need to install a new air filter. Filter replacements are easily available, but the filters for the 400s air purifier are expensive though.


I found that this air purifier runs relatively quietly which is a big bonus as it doesn’t distract from the TV when I’m watching. It also has great air flow. The light ring in front which is the air quality sensor, does a good job of monitoring the air so that you know what is going on. I definitely noticed a difference in air quality after I started running this machine and it didn’t take long.

The filter is nicely hidden but easy to access when needed. I have zero complaints about performance. It does an excellent job. The AIRMEGA app is also very easy to use, giving you the ability to control everything, making it a smart air purifier.

Bottom Line

You really can’t go wrong with the AIRMEGA 400S App Enabled Air Purifier. It runs quiet, looks nice and scrubs your air very well. The only downside is that the replacement filters are expensive, however, it works so well, I believe it is a worthwhile investment for healthier air in your home. Especially if you have allergies and asthma that require cleaner air. The pollution level in your home will be much lower. Cleaning the air in your home is one of the best gifts you can give yourself.

Check out our appliance reviews for more for your home. Some other top picks are the Rabbit Air Minusa2, Coway Iocare, the AP1512HH Mighty, Honeywell HPA300, and the Airmega 300s. Learn more in our air purifier reviews.

Whether you are looking for air purifiers for mold, air purifiers for pets, or an air purifier for smoke, Gadget Review has many health and wellness appliance reviews, all with pros and cons.

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Conner Flynn

Conner has been blogging for major Internet websites since 2007, specializing in gadgets, robots, technology and gaming. Conner also runs his own sites Internetvswallet.com, Scifidesign.com and Creepbay.com. Conner also likes cats and movies, in that order.

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