Coway Airmega 300 Smart Review

Air Purifier
The Coway Airmega 300 room air purifier accomodates room sizes of up to 1,256 square feet & cleans the air at least two times per hour when you use it as recommended.
Coway Airmega 300 Smart

Review Feature Summary

  • Coway Airmega Max2 filter.
  • Coway Airmega’s pollution sensor.
  • Coway Airmega has five fan modes.
* On special until end August 2020

Coway Airmega 300 Smart Air Purifier

Mark Johnson
Mark Johnson
Air Quality Expert
Last Updated:  Aug, 2020
Rated from 6422 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 300 Smart (On special until end Aug, 2020) has all the qualities and features, giving it an added advantage and an edge over its competitors.

Quick Summary of the Coway Airmega 300 Smart

Coway Airmega air purifiers are designed to ensure your indoor air is cleaner, with fewer harmful particulates and unpleasant odors.

The Good & the Bad


  • Beautiful High Quality Design
  • Noise-Free
  • Adjustable Sensitivity Levels


  • The air quality sensor1 light is pretty nice, but I also don't trust it completely.

Key Features

  • Air Quality Monitoring – Coway Airmega’s pollution sensor communicates indoor air quality in real-time. The brightly colored LED ring3  lets you know how clean or dirty your indoor air is every minute of the day.
  • Smart Technology – With its Smart Mode feature, the Coway Airmega automatically adapts to its surroundings by adjusting fan speeds based on the room’s air quality.
  • Powerful Dual Suction – Coway Airmega draws contaminated air from two sides & pushes filtered air out the top of the unit, cleaning the air you breathe faster & more efficiently.
  • Max2 Filter – The Max2 filter—a combined activated carbon & a True HEPA filter—captures & reduces up to 99.97 percent of particles 0.3 microns in the air, including pollen, pollutants & other allergens.
  • Pre-filter – The easy-to-clean pre-filter captures large particles like hair, fur & dust in its micromesh, so Max2 filter can work more effectively.

What's Included?

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

  • Pre-filter
  • User's guide
  • 2 years warranty
  • Max2 Filter
  • Coway Airmega 300 Smart

Common Questions

  • How loud is the Coway Airmega 300 Smart's filter at regular (not night) volume?

It really is not that loud! The standard volume is varied from step 1, 2, 3.

  • How do you clean the Coway Airmega 300 Smart Purifier?

You can clean the pre filter manually and esnure you replace the, HEPA filters 2  roughly once a year.

âś… Can You Place Your Air Purifier On The Carpet?
âś… How Do You Clean A Coway AirMega?
âś… What is the Best Air Purifier?
âś… Are Air Purifiers Worth It?

Our Verdict

The unit is an amazing air purifier, during the day, You pay for quality. this purifier is made solid and with high quality parts. It also works fast. The Airmega has been able to control the dust and remove the strong odor of stain and varnish.

What to Look for in a New Air Purifier?

If you’re in the market for a new Air Purifier, you’re probably looking at the different options and wondering which is the best one to choose.

Don’t worry, we’ve got you covered. Our reviews are based on the following features:


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


IQAir Health Pro Plus

Our Rating: 9.2/10

IQAir Health Pro Plus​


Rabbit Air A2

Our Rating: 9.4/10

RabbitAir MinusA2​



Our Rating: 9.0/10

Winix 5500-2


Honeywell 50250

Our Rating: 8.6/10

Honeywell 50250-S

Have you read our article on the air cleaner for smokers?

Or our article on the air cleaners for mold?

Mark Johnson

Mark Johnson

Mark advises business, individuals, and organizations on how to use and get the best purifiers so as to maintain their offices and homes. For a fresher and cleaner environment, he is the man for you. He loves ideas and concepts and uses his skills to make them a reality.

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