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Coway

Coway Airmega 400S App-Enabled Smart Air Purifier (Covers 1,560 sq. ft.), True HEPA Air Purifier with Smart Technology, Compatible with Amazon Alexa and Google Home, White (111012)

  • Based on 6,465 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Feb 21
Order within 12 hours and 35 minutes
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Style: 400S WHITE


Features

  • [Coverage] Designed to clean spaces up to 3,120 sq. ft. in 60 minutes
  • [HyperCaptive Filtration System] Combination of a pre-filter, active carbon filter, and HEPA Filter reduces 99.97% of 0.3 micron particles, including pollen and other allergens. It also reduces volatile organic compounds and odor
  • [Smart Mode] With its Smart Mode feature, the Airmega automatically adapts to its surroundings by adjusting fan speeds based on the room's air quality. That means your unit is energy efficient without compromising effectiveness
  • [Eco Mdoe] When the air quality in the room remains purified for 30 minutes or more in Eco Mode, the fan will turn off to conserve energy, kicking on again when pollution is detected

Description

The most advanced air purifier developed by Coway. Airmega is a connected air purifier that intelligently, effectively and quietly cleans the air in your home. Its dual-filtration system removes 99. 97 percent of particulate matter from the air, while the accompanying Airmega mobile app (iOS Android) allows you to monitor and manage air quality from almost anywhere.

Color: White


Brand: Coway


Product Dimensions: 14.8"D x 14.8"W x 22.8"H


Power Source: Corded Electric


Item Weight: 24.7 Pounds


Color: White


Brand: Coway


Product Dimensions: 14.8"D x 14.8"W x 22.8"H


Floor Area: 3120 Square Feet


Specification Met: CARB Certified, ETL Certified


Noise Level: 22 Decibels


Particle Retention Size: 0.3 Micron


Wattage: 66 watts


UPC: 826439150006


Contaminant Filtration Capability: Dust, Odors, Pet Dander, Pollen, Volatile Organic Compounds (VOCs)


Global Trade Identification Number: 06


Special Feature: Air Quality Monitor, Eco Mode, Filter Life Indicator, Smart Mode, Wi-Fi Enabled


Manufacturer: Coway


Smart Home Compatibility: Smart Home Compatible


Filter Class: HEPA


Item Weight: 24.7 pounds


Item model number: Airmega 400S


Is Discontinued By Manufacturer: No


Perfume: Unscented


Care instructions: User Manual


Assembly required: No


Number of pieces: 1


Warranty Description: 5 year manufacturer's limited warranty


Batteries required: No


Included Components: Air Purifier, Filter Set, User Manual


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Feb 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Take it from a skeptic: After 3.5 years, no regrets! This Coway air purifier is perfect!
Style: 400 Graphite
We purchased this unit in June 2022, nearly 3.5 years ago. That said, this review is coming from a place of experience with this air purifier. We had just adopted two cats that were born in the bushes outside our home, and I don't particularly care for cats (or more specifically, the smell of cats)! I was concerned about the price of this machine, not because it was crazy expensive compared to other machines that claim to be able to do what this purifier does, but because I didn't want to spend even half of what this thing cost just to keep the house from smelling like cats. On top of that, I didn't want to have to keep buying filters for it. I chose to bite the bullet and purchase this because I figured that if this device could keep the cat smell to a minimum, it would be worth every penny. The recommendation is every year or two, but they are so easy to clean that we were able to extend the filter life quite a bit! The outermost screen filters are quick and easy to get the dust off. It takes about one minute per filter (one on each side) to vacuum off. We clean these filters every 45-60 days. The innermost filters - the big ones with the charcoal - we clean every 12 months. Those take a little longer to clean, but no more than 5 minutes with a vacuum attachment. Everything on this device is easy to remove and replace. Now for the important part... Until just this very week, I have never - and I do mean NEVER - noticed a cat smell in our home. My in-laws have a cat, and they have commented several times over the years how amazing it is that our home never smells like cats - or any odors for that matter! My sister-in-law is allergic to cats but doesn't have any issues at our house. Fast forward to today, I have grown a bit fonder of the cats but still don't like cat smells! I came to Amazon today to purchase my very first set of replacement filters, if that tells you anything about the longevity of these filters! I decided to leave this review just in case anyone else is on the fence about this air purifier. It works. Perfectly. All day. Every day. Additionally, I no longer use expensive HEPA filters in our HVAC system because this purifier takes nearly everything out of the air that those would catch anyway. For anyone who's curious: We have a 1900SF home. I was able to find a great location for this fairly close to the middle of our home so that it purifies the entire house. I go weeks at a time without even realizing this thing is in the room - it just blends in and disappears! If it detects odors, it will speed up for a brief period of time, but almost always runs at the lowest speed - nearly silent. I'm certain that this would even work in larger homes than ours, because in our home it typically only runs at 25%. There are a number of controls so you can adjust the speed, setting, schedule, etc., but we never use them. We just set it and forget it. The power this unit can produce (and the amount of air it can move) is incredible. This purifier brings air in from the sides of the unit and exhausts it out from the top, creating perfect circulation. As an added (undocumented, unsupported) function, anything you place near the top of this unit (potpourri, air diffusers, essential oils, etc.) is quickly dispersed throughout the home. ... show more
Reviewed in the United States on December 5, 2025 by Danlo
    • 5 yrs strong!!
Style: 400 White
I’m going on my 5th year using this device daily, it has rarely ever been turned off. I run it on the setting below the highest, always. I will say it isn’t quiet but it isn’t loud. It creates a nice white noise that is adaptable. I have replaced the filters in it every 9-12 months due to a dust issue living near a lot of farm land, plus I have all hardwood floors, no carpet. I have a small dog in the home who often has company and Im a smoker. Over all I feel like the air is fresh and it helps immensely with dust and dog hair! I never smell my dog or cigarettes in the home. When I come in after work and the house has been closed up all day, I can smell my plugins right outside the front door which is a great thing. I clean the pre-filters weekly and they normally have a good coating of dust and dander that I spray away down the sink. In the summer I sometimes find mosquitoes on the pre-filter! I hit the main filters with the Dyson about once a month as the fine dust does collect and prevent air flow. I have to admit that the original filters did a better job and lasted longer than the off-brand ones that I purchase for about $25 per set but the savings outweigh the loss of quality by far as they are quite comparable with fit and filtration. The sensor is very sensitive to the environmental changes and air flow will increase with change. I love that the front and back are also detachable by sliding upwards and can also be easily removed to be cleaned like the 2 magnetic sides that cover the filters. It has a night mode and a timer feature although I rarely use either. My home is a 1300 sq ft ranch style therefore the layout is somewhat boxy. The device is centrally placed however I believe the lay out of my home would be most benefited from an additional unit as the bedrooms still collect quite a bit of dust but are somewhat partitioned except the doorways. I will definitely purchase another Conway product when my budget allows as I’m very pleased with the reliability and ease of the airmega 400 however it was considered an investment at its price point. ... show more
Reviewed in the United States on January 10, 2026 by Kimmy

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