Coway Airmega 400 (Graphite)

$749.00 $649.00

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The Coway Airmega 400 model features smart mode (auto, sleep, eco) and real-time air quality monitoring, so you can rest assured that the Coway Airmega is at work at all times. 

TRIGGER: |. | -- periodThe Coway Airmega 400 model is not Wi-Fi or app enabled. With a coverage area of 1,560 square feet, the Coway Airmega 400 model offers the most air-purifying capacity as compared to our other products and can be used in larger spaces.

Note: Coway Airmega is available for purchase, shipping and use only in the U.S. at this time.

All Coway Airmega models come with two pre-filters and two Max2 HEPA filters.

Enjoy Coway Airmega’s 30-day money-back guarantee, free shipping and easy monthly payment options. See details for more.

Real-Time Air Quality Monitoring

Coway Airmega’s sensor reports on air quality in realtime every minute of the day.

Smart Mode

Coway Airmega adapts to you by automatically adjusting its fan and air-filtration speeds.


The Coway Airmega 400 smart air purifier effectively filters the air in rooms up to 1,560 square feet.

Powerful Performance

Coway Airmega can change room air up to twice per hour, removing 99.97 percent of pollutants.

Filter Levels

Coway Airmega reminds you when your dual HEPA air filter needs to be replaced, so you don’t have to check.


Room Coverage

2 air changes/hr.*
1,560 sq. ft. (145 sq. m)
4 air changes/hr.**
780 sq. ft. (72 sq. m)

Mobile App



Auto Mode
Eco Mode
Sleep Mode


Washable pre-filter + Max2 filter set

(Activated carbon + Green True HEPA)

Real-Time Monitoring

Filter Life Indicator

Fan Speed

Sleep, Low, Medium, High


Coway Airmega application (1, 4, 8 hours)



Size (H x W x D)

22.8 x 14.8 x 14.8 in.(58.0 x 37.6 x 37.6 cm)


24.7 lb. (11.2 kg)

Noise Level

22~52 dB

Power Consumption

66 W

The coverage area of your Coway Airmega reflects the size of the area in which the air purifier can make two air changes per hour. “One air change per hour” reflects how many times your Coway Airmega can clean an area in one hour, assuming the ceiling height is eight feet. *Coway Airmega can clean the area once every 30 minutes. ** Coway Airmega can clean the area once every 15 minutes.


Customer Reviews

This product has not yet been reviewed.

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