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Coway Airmega 400 Smart Air Purifier with 1,560 sq. ft. Coverage, White

4.7 out of 5 stars 1,243 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in HEPA Filter Air Purifiers by Coway

List Price: $749.00 Details
Price: $523.12 & FREE Returns
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Color White
Brand Coway
Product Dimensions 14.8 x 22.91 x 14.8 inches; 24.7 Pounds
Power Source Corded Electric
Floor Area 1560 Square Feet

About this item

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  • Coway Airmega 400 room air purifier is designed to accommodate large room sizes up to 1,560 square feet and cleans the air at least two times per hour when used as recommended.
  • Coway Airmega Max2 filter-a combined activated carbon and a True HEPA filter-captures and reduces up to 99.99 percent of particles 0.01 microns in the air, including pollen, pollutants and other allergens. It also reduces more than 99 percent of volatile organic compounds and reduces fumes such as NH3 and CH3CHO.
  • Coway Airmega’s pollution sensor communicates indoor air quality testing in real-time. The brightly colored LED ring lets you know how clean or dirty your indoor air is, every minute of the day.
  • Coway Airmega has five fan modes: Smart, Sleep, Low, Medium and High. Noise level is nearly silent at lower speeds. Max noise at highest setting is 43.2 dB.
  • Coway Airmega is a smart, energy efficient air purifier with a three-setting smart mode to adapt to its surroundings. Fan speed automatically adjusts based on the room’s air quality and lighting conditions to improve air quality.
  • Coway Airmega has a timer with 1, 2, 4 and 8 hour settings, plus indicators for filter lifetime for both the washable pre-filter and Max2 filter.
  • Coway Airmega 400 is Energy Star certified and consumes 64 watts.
  • Limited manufacture’s warranty covers any internal malfunctions for 1 year and motor and electronic parts for 5 years. Filters are excluded.

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Frequently bought together

  • Coway Airmega 400 Smart Air Purifier with 1,560 sq. ft. Coverage, White
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From the manufacturer

Airmega 400S Banner

Breath Deeper.

Airmega 300 400 Filter Configuration

Coway IoCare and Voice Control

filter Indicator

Filter Levels

The air filter indicator tells you when the two Max2 filters need to be replaced, and the pre-filters need to be cleaned for maximum efficiency, based on how much air they have processed.

Max2 filter

MAX2 Filter(Green True HEPA + Activated Carbon)

Coway Green True HEPA filter traps 99.99 percent of airborne particles up to 0.01 microns in size, and Coway Activated Carbon filter removes harmful gases, volatile organic compounds (VOCs) and odors from your indoor air.

Coway Airmega Premium Line-up

Airmega 400

Airmega 400

Airmega 400(G)

Airmega 400(G)

Airmega 400S

Airmega 400S

Airmega 400(G)

Airmega 400S(G)

Airmega 300S

Airmega 300S

Airmega 300

Airmega 300

Airmega 250

Airmega 250

Coverage
1,560 sq. ft. 1,560 sq. ft. 1,560 sq. ft. 1,560 sq. ft. 1,256 sq. ft. 1,256 sq. ft. 930 sq. ft.
App & Alexa & DRS
Auto Mode
Eco Mode
Sleep Mode
Automatic Automatic Automatic Automatic Manual Manual Automatic
Rapid Mode
Filters Configuration
Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA
Pollution Indicator
Filter Life Time Indicator
Manual Fan Speed
Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High
Timer & Scheduler
Timer 1, 4, 8 Hr Timer 1, 4, 8 Hr Timer 1, 2, 4, 8 Hr, Scheduler Timer 1, 2, 4, 8 Hr, Scheduler Timer 1, 2, 4, 8 Hr, Scheduler Timer 1, 4, 8 Hr Timer 1, 4, 8 Hr
Available Colors
White Graphite White Graphite White White Beige

Product description

The most advanced air purifier developed by Coway. Air mega is a connected air purifier, that intelligently, effectively and quietly cleans the air in your home. Its dual-filtration system removes 99.97percent of particulate matter from the air, while the accompanying pollution indicator allows you to monitor and manage air quality real-time.The coverage area of the Coway Airmega reflects the size of the area in which the air purifier can make two air changes per hour. “Air changes per hour” reflects how many times your Coway Airmega can clean a given area in one hour, assuming the ceiling height is eight feet

Room Coverage

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

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here. [PDF ]

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Customer Rating 4.7 out of 5 stars (1243) 4.9 out of 5 stars (53) 4.7 out of 5 stars (663) 4.7 out of 5 stars (12185) 4.7 out of 5 stars (38788) 4.7 out of 5 stars (8358)
Price $523.12 $71.54 $470.85 $249.99 $99.99 $299.99
Shipping FREE Shipping. Details FREE Shipping. Details FREE Shipping. Details FREE Shipping. Details FREE Shipping. Details FREE Shipping. Details
Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com
Color White White Graphite/Silver White White White
Item Dimensions 14.8 x 22.91 x 14.8 inches 11 x 7 x 7 inches 14.8 x 14.8 x 22.8 inches 9.6 x 16.8 x 18.3 inches 8.7 x 8.7 x 16.25 inches 13 x 13 x 20.4 inches
Item Weight 24.70 lbs 4.41 lbs 24.70 lbs 12.79 lbs 8.82 lbs 13.00 lbs

Customer Questions & Answers

Customer reviews

4.7 out of 5 stars
4.7 out of 5
1,243 global ratings
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Top reviews from the United States

Reviewed in the United States on June 25, 2019
Verified Purchase
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1.0 out of 5 stars UPDATE - Coway wouldn't repair/replace :(
By Ben Gonzalez on June 25, 2019
UPDATE MAY 2020: the unit began making a squealing sound from the fan that got progressively worse. I contacted Coway's warranty department but they wouldn't repair/replace as the unit was listed as "used", which was news to me, and the warranty applies to the original purchaser. I was the original purchaser! The unit came in Coway box, wrapped, sealed, etc... disappointed in my $500+ squeal machine. BE AWARE!
UPDATE: 1st month in and going strong. I cleaned the pre-filter per the schedule, and also the air sensor with a cotton swab. Note that when cleaning the pre filter, I used the handheld attachment on the vacuum, it's wise to vacuum from the direction of the air flow, e.g. the "outside" of the filter, so as not to force the particles through the fine mesh via the suction. I hope this helps!
My wife suffers from severe allergies (pets, pollen, you name it). We had tried high efficiency filters in the central air, humidifiers, regular vacuuming, to no avail. She was on a daily regiment of Allegra and/or Zyrtec, and a full night's rest was hard to come by.
The Airmega 400 has completely changed her quality of life. We've had it for 4 days and there's no looking back!

Room size: if you've done any research, you already know that the size of the room(s) determine the size of air purifier due to its ability to turn over the air in the space. The unit is rated at 2 air changes per hour at 1560sf, a very solid rating, If you have exceptionally tall ceilings, take that into account too. We intentionally have it in the bedroom to filter that area and the adjacent living space, about 500sf or so. It's handling that area very well. (We're now going to buy another unit for downstairs.)

Size: It is a large-ish unit so check the dimensions for your intended location. For reference, think of it as the size of an end table. It intakes air from two sides and blows air out of the top, so it needs free space on each side and you obviously can't put anything on top of it.

Noise: in sleep mode, it's unnoticeable. We have a fan in the room which completely masks the fan sound as it switches from sleep to low. It gets progressively louder as it cranks up, but in our experience it has only turned on high when we've vacuumed or stirred up the elements. In the medium range, it's not much louder than the air coming through the vents of the AC system...not enough to draw our attention. The high setting is loud and the unit will move serious air but again it's only triggered for a few minutes at a time.

Smart Mode: I have so far been impressed with its ability to sense changes in the air and turn up/down automatically. It works exactly as advertised. The LED indicator is helpful to see the air quality in the room.

Sleep Mode: while the LED air quality indicator is nifty, it's too bright for the bedroom and we turn it off at bedtime. Again, the whisper quiet night setting is great.

Cleaning: I haven't had to clean the unit but it seems straightforward to open the side air intake vents and access the filters. I did note that the filters fit squarely and securely in the unit with no gaps. The tolerances are well engineered.

I didn't see the value in the app enabled "S" versions. I saved a few bucks and went without.
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