Coway Airmega 300 Smart Review

Air Purifier
Coway Airmega 300 room air purifier is designed to accommodate room sizes up to 1,256 square feet and cleans the air at least two times per hour when used as recommended
Coway Airmega 300 Smart

Smart Air Purifier with 1,256 sq. ft. Coverage

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

Coway Airmega 300 Smart Air Purifier

Mark Johnson
Mark Johnson
Last Updated:  Jun, 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 Jun, 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.
  • Very Quiet.
  • Adjustable Sensitivity Levels..


  • The air quality sensor 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 ring 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 and pushes filtered air out the top of the unit, cleaning the air you breathe faster and more efficiently.
  • Max2 Filter – The Max2 filter—a combined activated carbon and a True HEPA filter—captures and reduces up to 99.97 percent of particles 0.3 microns in the air, including pollen, pollutants and other allergens.
  • Pre-filter – The easy-to-clean pre-filter captures large particles like hair, fur and dust in its micromesh, so Max2 filter can work more effectively.

Useful Product Info

  • Product Dimensions: 13.6 x 13.6 x 21.2 Inches
  • Product Weight: 21.4 Pounds
  • Product Color: White

Common Questions

  • How loud is this filter at regular (not night) volume?

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.

  • How do you clean this?

Pre filter can be cleaned by hand, HEPA filters (2) replaced roughly once a year.

What Others Think

At the time of writing this review, there were:

  • 838 Customers
  • Who Gave it a Rating of 4.6 Out of 5.

What's Included?

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

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

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


Our Rating: 9.2/10

IQAir Health Pro Plus​


Our Rating: 9.4/10

RabbitAir MinusA2​


Our Rating: 9.0/10

Winix 5500-2


Our Rating: 8.6/10

Honeywell 50250-S

Have you read our article on the honeywell air purifiers?

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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