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Home » Coway Airmega 400 vs 400s: Which Smart Air Purifiers are Better?

Coway Airmega 400 vs 400s: Which Smart Air Purifiers are Better?

Coway Airmega 400 vs 400s

If you are constantly sneezing, your home is covered in dust and there is a stale smell in the air, it might be a good time to invest in an air purifier. Clean air in your home prevents allergies and can help combat mold, bacteria and viruses.

Today, we will be looking at two air purifiers with impressive cleaning capabilities, the Coway Airmega 400 vs 400s. We will go over all of their specifications including technology, appearance and value for money. To make a decision on the best air purifier, we will add a comparison chart and some pros and cons.

The Coway Airmega 400 and the Coway Airmega 400s are incredibly similar, so we will begin with the features they have in common.

Coway Airmega 400 vs 400s – Similarities

Quick Glance

The side-by-side chart below offers a quick overview of the Coway Airmega 400 and the Coway Airmega 400s.

Name
Coway Airmega 400 Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart...
Our Pick
Coway Airmega 400S App-Enabled Smart Technology, Compatible with Amazon Alexa and Google Home True...
Image
Coway Airmega 400 Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart...
Coway Airmega 400S App-Enabled Smart Technology, Compatible with Amazon Alexa and Google Home True...
Size
14.8 x 14.8 x 22.91 inches
14.8 x 14.8 x 22.8 inches
Weight
24.7lbs
24.7lbs
Color
White
White or Graphite
Room Size
1560 sq. ft
1560 sq. ft
Filtration
3-stage, up to 99.999% of particles 0.01 microns. Pre-filter, carbon and True HEPA
3-stage, up to 99.999% of particles 0.01 microns. Pre-filter, carbon and True HEPA
Filter Indicator
Fan Speeds
3
3
Real-Time Air Quality Monitoring
Auto Mode
Auto Shutoff
Timer
1, 4, and 8 hours
1, 2, 4, and 8 hours
Coway Smart Technology
Yes, Eco and Sleep mode
Yes, Eco and Sleep mode
Mobile App
IoCare
Voice Control
Yes, with Amazon Alexa
Warranty
5 years limited
5 years limited
Prime status
-
Name
Coway Airmega 400 Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart...
Image
Coway Airmega 400 Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart...
Size
14.8 x 14.8 x 22.91 inches
Weight
24.7lbs
Color
White
Room Size
1560 sq. ft
Filtration
3-stage, up to 99.999% of particles 0.01 microns. Pre-filter, carbon and True HEPA
Filter Indicator
Fan Speeds
3
Real-Time Air Quality Monitoring
Auto Mode
Auto Shutoff
Timer
1, 4, and 8 hours
Coway Smart Technology
Yes, Eco and Sleep mode
Mobile App
Voice Control
Warranty
5 years limited
Prime status
Our Pick
Name
Coway Airmega 400S App-Enabled Smart Technology, Compatible with Amazon Alexa and Google Home True...
Image
Coway Airmega 400S App-Enabled Smart Technology, Compatible with Amazon Alexa and Google Home True...
Size
14.8 x 14.8 x 22.8 inches
Weight
24.7lbs
Color
White or Graphite
Room Size
1560 sq. ft
Filtration
3-stage, up to 99.999% of particles 0.01 microns. Pre-filter, carbon and True HEPA
Filter Indicator
Fan Speeds
3
Real-Time Air Quality Monitoring
Auto Mode
Auto Shutoff
Timer
1, 2, 4, and 8 hours
Coway Smart Technology
Yes, Eco and Sleep mode
Mobile App
IoCare
Voice Control
Yes, with Amazon Alexa
Warranty
5 years limited
Prime status
-

Appearance

There is not a noticeable difference between the Coway Airmega 400 and the Coway Airmega 400s. They are both 14.8 x 14.8 inches and weigh 24.7 pounds. The Coway Airmega 400 is 22.91 inches high and the Coway Airmega 400s are 22.8 inches. The Coway Airmega 400 comes in white. You can choose between white or graphite with the Coway Airmega 400s.

Coway Airmega 400s comparison

Room Size

The Coway Airmega 400 and the Coway Airmega 400s are suitable for rooms up to 1560 square feet, although the Coway Airmega 400s is also available for rooms up to 1256 sq. ft. Both of the air purifiers will clean the air twice per hour.

Filtration

There are three stages of filtration with the Coway Airmega 400 and the Coway Airmega 400s, removing up to 99.999% of dirt and dust particles as small as 0.1 microns. The washable pre-filter captures hair and large particles. The MAX2 Green True HEPA filter is for fine dust, viruses, mold, and bacteria. Finally, the activated carbon filter removes food smells, smoke, harmful gases, and other odors.

Filtration Indicator

When the filters of the Coway Airmega 400 and the Coway Airmega 400s need replacing, there is a light on the top of the air purifiers.

Fan Speeds

There are three fan settings with the Coway Airmega 400 and the Coway Airmega 400s, low, medium, and high. That being said, you can also switch to auto mode where the fan speed will adjust depending on the quality of the air.

Coway Airmega 400 comparison

Real-Time Air Quality Monitoring

The LED lights on the front of the Coway Airmega 400 and the Coway Airmega 400s indicate real-time air quality, changing from red for unhealthy through to blue for good.

Coway Smart Technology

Both the Coway Airmega 400 and the Coway Airmega 400s have Coway Smart Technology. When the room has been dark and the air clean for 3 minutes, they will become quieter and reduce power consumption. When the air quality remains pure for 10 minutes, the fans will switch off.

Value for Money

Currently, there is about a $5 difference between the Coway Airmega 400 and the Coway Airmega 400s. They also both come with a generous 5-year limited warranty.
Surprisingly, there are still two features to go and it’s these that set the air purifiers apart.

 Differences Between Coway Airmega 400 and Coway Airmega 400S

Timer

Although they both have a timer, there is a slight difference in the schedules.

Coway Airmega 400 review

Coway Airmega 400

You can set the timer for1, 4 and 8 hours.

Coway Airmega 400s

As well as 1, 4, and 8 hours, you can also choose to run it for 2 hours.

The Winner Is- The Coway Airmega 400s


Controls

All of the buttons are on the air purifiers, but one has more modern ways of setting the controls.

Coway Airmega 400s review

Coway Airmega 400

You will have to make do with the controls on the air purifier.

Coway Airmega 400s

The IoCare app helps you to monitor the quality of the air in a room, but it also updates you on the quality of the outdoor air. You can also check filters and set up schedules. What’s more, this air purifier is compatible with Alexa.

The Winner Is- The Coway Airmega 400s

Read next – IQAir HealthPro Plus vs GC MultiGas: Which Air Purifiers are Better?

Pros and Cons

Before the final verdict, we have some pros and cons of the Coway Airmega 400 and the Coway Airmega 400s to help highlight any other differences.

Coway Airmega 400

Coway Airmega 400

Pros:

  • The pre-filter is easy to remove and wash off
  • It’s very quiet on the lowest setting
  • Auto mode is perfect to just leave it to do its work

Cons:

  • Not so effective on odors

Coway Airmega 400s

Pros:

  • The fan kicks up a gear when you are cooking or cleaning, so auto mode really works
  • The newly updated IoCare app works very well
  • It’s an excellent choice for those with breathing difficulties

Cons:

  • You might have to play around with your Wi-Fi settings

The Final Verdict

The most important thing is that both of these Coway air purifiers do an amazing job at cleaning the air in large rooms. We liked how you could hear the fan increase when the air was not as pure, and the LED lights were quite accurate too. The size and design really were identical, so this didn’t factor into the decision. We felt that the Coway Airmega 400S was the winner today. Essentially, they are the same air purifiers but now that the app is better and it works with Alexa, the ease of use is better and for a couple of dollars more, well worth it.