Coway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, White
Coway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, White
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Coway

Coway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, White

79 ratings
Coway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, WhiteCoway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter WhiteCoway WiFi enabled 400s Graphite True Hepa Air Purifier with 1560 sq ft Coverage Black
Actual ColorWhite

Key item features

  • Smart Purification: Console air purifier removes 99.97 percent of pollutants by changing room air up to twice per hour, ensuring clean air in your home.
  • Automated Operation: Automatically adjusts fan and air-filtration speed for auto, sleep, and eco settings, with real-time air quality monitoring and reporting.
  • Included Filters: Comes with a washable pre-filter and two Max2 HEPA filter sets, with filter alerts indicating when replacements are needed.
  • Extensive Coverage: Recommended for rooms up to 1,560 square feet, featuring four fan speeds for versatile air purification.
  • Connected Control: Smart technology allows control via the Coway Airmega app or Amazon Alexa, enhancing user convenience.
  • Compact Dimensions: Measures 14.8 x 14.8 x 22.8 inches and weighs 24.7 pounds, making it a portable and space-efficient unit.
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Specs

Filter type, HEPACoverage area, 3120 sq ftClean air delivery rate, 416 CFMContaminants removed, BacteriaMicroparticle performance rating, 99.99Brand, Coway

About this item

Product details

Take charge and keep the air you breathe clean with the Coway Airmega 400s HEPA Air Purifier. By changing room air up to twice per hour, this HEPA air purifier removes 99.97 percent of pollutants from your home. With smart air purifier technology, you can monitor air quality in real-time, while simultaneously controlling your Airmega purifier on the Coway Airmega app or through your Amazon Alexa. With automatically adjusting settings, the Conway Airmega Purifier really does it all - it's a shame it can't cook dinner though.
  • Smart console air purifier ensures that the air in your home is free of contaminants Removes 99.97 percent of pollutants by changing room air up to twice per hour Automatically adjusts fan and air-filtration speed for auto, sleep, and eco settings Smart air purifier technology monitors and reports air quality in real-time
  • Washable pre-filter and 2 Max2 HEPA filter sets come included Filter alerts lets you know when the filters need to be replaced Specifications: Product type: Console air purifier Filter: Yes
  • HEPA filter: Yes Number of fan speeds: 4 Portable: Yes Recommended room size: 1,560 square feet Features: Eco mode, sleep mode, mobile app Color: White Dimensions (L x W x H): 14.8 x 14.8 x 22.8 inches Weight: 24.7 pounds
info:
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Specifications

Filter type

HEPA

Coverage area

3120 sq ft

Clean air delivery rate

416 CFM

Contaminants removed

Bacteria

Warranty

Warranty information

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Warnings

Customer ratings & reviews

4.2 out of 5 stars
stars
79 ratings67 reviews
Includes global ratings and reviews
How item rating is calculated
  1. 5 stars68% (54)
  2. 4 stars15% (12)
  3. 3 stars4% (3)
  4. 2 stars0% (0)
  5. 1 star13% (10)

Reviews summary

Pros

  • : Runs at various speeds without disturbance.
  • : Features a modern aesthetic with clean lines.
  • : Setup requires minimal effort and few steps.
  • : Clearly indicates air quality levels.

Neutral

  • : Unit reduces dust but filter removal releases trapped particles.
  • : Can be convenient, but also prone to connectivity issues.
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Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
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Showing 1-3 of 67 reviews

Sep 4, 2025
Reviewer name: Gary
Item details
Color: Graphite
Sold and shipped bySylvane
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

High Quality. Exceptional performance.

A solid purchase. This air purifier does the job exceptionally well. I highly recommend anyone to purchase one for themselves. This air purifier does a good job at getting rid of all types of bad smells. Its air cleaning abilities is very noticeable in a short amount of time. I like the fact that the filters are easy to access, clean and change out.

Helpful?3SLCUCE18QQS150937260
Oct 11, 2025
Reviewer name: Jody
5 out of 5 stars
5 out of 5 stars review

Seller Verified Purchase

Excellent large room purifier

This unit services our open concept living room and kitchen. The dimensions are about 20x40 feet with 13 foot ceilings. The smart setting raises the fan speed when we are cooking despite have an exhaust hood running above the stove. It does not take long to settle back down to its lower speeds. It has a large footprint, and its suction points are on opposite sides so you'll need clearance around the unit as well. The app is not as bad as people make it out to be. Maybe it used to be, but my setup and use have been near flawless. I do get unstable connection notification on occasion, but we have a very dense network of IoT devices. I do wish the reports were searchable via hovering over data points, so I could pinpoint times high readings occurred.

Review from Coway USA
Helpful?3SLCUCE18QQS150937260
reply from Customer Service

Thank you for sharing such a detailed and insightful review of the Airmega 400S! We're glad to hear it's effectively handling your spacious open-concept layout and responding intelligently to changes in air quality—especially during cooking. Your feedback on the footprint and clearance needs is spot-on and helpful for other users to consider. We also appreciate your take on the app experience; it's great to know setup has been smooth, and your suggestion about searchable data points is a smart one—we’ll be sure to pass it along to our team. Thanks again for choosing Airmega and for helping us improve with your thoughtful input!

Nov 26, 2024
Reviewer name: Steve
Item details
Color: Graphite
Sold and shipped byCoway USA, Inc.
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I highly recommend this product

Looks good and quiet. Self checks air quality in smart mode and adjusts fan speed acordingly. Fan stops when the air quality remains good for 10 minutes. Fan starts when bad air quality is detected or after 30 minues. Air quality indicator is prominently displayed in front using color code. This unit has indicators to let you know when the prefilter needs cleaning and when the carbon/hepa filter needs changing. Unit setup was a breeze. Wifi and mobile app setup was easy and without a glitch! This unit has been setup in my living room. I plan to get another Coway air purifier for my bedroom. I was first impressed by a Coway air purifier in my in-laws living room. I'm glad to have one in my living room now. I highly recommend this product.

Incentivized Review
Helpful?3SLCUCE18QQS150937260
Current price is $679.99
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Sold and shipped by Sylvane
4.2687224669603525 out of 5 stars
4.3 stars out of 5, based on 454 seller reviews(4.3)
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