Coway Airmega 400 Smart Review

Mark Johnson
Mark Johnson
Air Quality Expert
Last Updated: 25 Aug 2020
(Rated from 9456 reviews)

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 Oct, 2020) has all the qualities and features, giving it an added advantage and an edge over its competitors.

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.
Coway Airmega 400 Smart

Review Feature Summary

* On special until end October 2020

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.

The Good & the Bad



Key Features

Useful Product Info

What Others Think

At the time of writing this review, there were:

What's Included?

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

Common Questions

It really is not that loud! Regular volume is varied from step 1, 2, 3. You really can't hear anything at 1, and 2, is quiet too. Once it's 3, and the lights turn redish or dark pink, it does start to sound a bit louder.

You can clean the pre-filters manually, but you should replace the HEPA fitler2 at least once every year. .

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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.



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