The In-Depth Coway Airmega 400 Smart Review

Are You Considering the Coway Airmega 400 Smart Air Purifier?

We review the Coway Airmega 400 Smart to help you choose EXACTLY what you need.

* On special until end August 2021

I think you’ll agree with me when I say:

It’s REALLY hard to choose an air purifier with all the options available!

Or is it?

Well, it turns out, that after years and hundreds of hours of testing & reviewing, we have strong opinions about what makes the best air filtration system: level of purification, efficiency, and maintenance.

The Coway Airmega 400 Smart (On special until end Aug, 2021) has all the qualities and features, giving it an added advantage and an edge over its competitors.

White Wall

Coway Airmega 400 Smart Air Purifier

Air Purifier
The most advanced air purifier intelligently, efficiently & quietly cleans the air in your home. It features the dual-filtration system that eliminates 99.97% of particulate matter from the atmosphere, while the accompanying pollution1 indicator enables you to effortlessly monitor & manage air quality in real-time.

Quick Summary of the Coway Airmega 400 Smart

Coway Airmega 400 is designed to accommodate room sizes up to 1,560 square feet and it cleans the air two times in one hour. Airmega Max2 filter – combined activated carbon and True HEPA filter – captures and reduces up to 99.97% of particles 0.3 microns in the air, including pollen, pollutants and other allergens. It also reduces more than 99% of volatile organic compounds and reduces fumes such as NH3 and CH3CHO. It also includes washable and permanent pre-filter to catch larger dust particles.

Coway Airmega 400 Smart

Review Feature Summary

* On special until end August 2021

What You Need to Know

The unit is an amazing air purifer. It works efficiently in clearing hair, dirt & debri from any surface.. We would recommend this product taking full advantage of its high performance and great price.

The Benefits & Drawbacks



Key Features

Specs & Useful Product Info

What Others Think

At the time of writing this review, there were:

Coway Airmega 400 Smart Review

Common Questions

How loud is the Coway Airmega 400 Smart filter at regular (not night) volume?
How do you clean the Coway AirMega 400 Smart Air Purifier?
Is Coway Air Mega 400 Air Purifier Good?

What's Included?

Here's what you get when you buy this Air Purifier:

Our Verdict

Coway Airmega air purifiers are designed to ensure your indoor air is cleaner. We would recommend this product for use in big rooms taking full advantage of its silent mode.

What Features Did We Look At?

If you’re in the market for a new air purifier, you’re probably looking at the different options and wondering which is the ideal one. Don’t worry, we got you covered.


Only the most effective purifiers make the cut.

Noise Level

So there's more clean air and less noise.


Because you need a machine that’s built to last.

Ease of Use

It needs to be easy to use and easy to clean.


The Top Air Purifiers We've Reviewed

The Competition: Lots of Options, but Most Aren’t as Affordable

If this air purifier isn’t quite for you, then I’d highly recommend you check out the following reviews:

Have you read our article on the air purifiers?

Or our article on the the best mould air purifiers review? is a participant in the Amazon Services LLC Associates Program & earns advertising fees by advertising and linking to
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