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

4.2 stars out of 78 reviews
(4.2)|
78 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 Air Purifier Airmega 400S Graphite True HEPA Air Purifier 1560 sq ft Coverage WiFi enabled Auto Eco Sleep Mode Air Quality Filter Replacement I
Actual Color:White
Graphite, $649.99
selected, White, $649.99

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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Current price is $649.99
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Columbus, 43215
Arrives by Tue, Feb 10
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Sold and shipped by Sylvane
4.256345177664975 stars out of 5, based on 394 seller reviews(4.3)
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Comparison Chart:
Minimum Efficiency Reporting Values (MERV)13Coway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, White13Coway Air Purifier Airmega AP-1512HH(White) True HEPA 3-Stages Filtration System with 361 Sq. Ft. Coverage, Auto & Eco Mode17Coway Air Purifier Airmega 160 Dove White True HEPA Filtration System with 214 sq ft Coverage, Cartridge Filter Change Indicator & Auto Mode13Coway Air Purifier Airmega 200M True HEPA with 361 sq. ft. Coverage in Black17COWAY Air Purifiers for Large Room Whole Home Up to 2,640 ft², True HEPA Filter for Smoke, Allergies, Pet Dander, Odor, PM 10 AQI, Turbo Eco Mode, Timer, Energy Star, 3yr Warranty, Airmega 350 White1RGF REME Halo - REME-H in-Duct Ultraviolet Air Purifier for Dust, Particulates, and Bacteria CFM
Contaminants RemovedBacteriaCoway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, WhiteBacteriaCoway Air Purifier Airmega AP-1512HH(White) True HEPA 3-Stages Filtration System with 361 Sq. Ft. Coverage, Auto & Eco ModeSmokeCoway Air Purifier Airmega 160 Dove White True HEPA Filtration System with 214 sq ft Coverage, Cartridge Filter Change Indicator & Auto ModeAllergensCoway Air Purifier Airmega 200M True HEPA with 361 sq. ft. Coverage in BlackBacteriaCOWAY Air Purifiers for Large Room Whole Home Up to 2,640 ft², True HEPA Filter for Smoke, Allergies, Pet Dander, Odor, PM 10 AQI, Turbo Eco Mode, Timer, Energy Star, 3yr Warranty, Airmega 350 WhiteBacteriaRGF REME Halo - REME-H in-Duct Ultraviolet Air Purifier for Dust, Particulates, and Bacteria CFM
Maximum Room Size1560 sq ftCoway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, White361 sq ftCoway Air Purifier Airmega AP-1512HH(White) True HEPA 3-Stages Filtration System with 361 Sq. Ft. Coverage, Auto & Eco Mode-Coway Air Purifier Airmega 160 Dove White True HEPA Filtration System with 214 sq ft Coverage, Cartridge Filter Change Indicator & Auto Mode361 sq ftCoway Air Purifier Airmega 200M True HEPA with 361 sq. ft. Coverage in Black-COWAY Air Purifiers for Large Room Whole Home Up to 2,640 ft², True HEPA Filter for Smoke, Allergies, Pet Dander, Odor, PM 10 AQI, Turbo Eco Mode, Timer, Energy Star, 3yr Warranty, Airmega 350 White-RGF REME Halo - REME-H in-Duct Ultraviolet Air Purifier for Dust, Particulates, and Bacteria CFM
HEPA FilterYCoway Airmega 400S Smart Home Whole Room Air Purifier with HEPA Filter, WhiteYCoway Air Purifier Airmega AP-1512HH(White) True HEPA 3-Stages Filtration System with 361 Sq. Ft. Coverage, Auto & Eco Mode-Coway Air Purifier Airmega 160 Dove White True HEPA Filtration System with 214 sq ft Coverage, Cartridge Filter Change Indicator & Auto ModeYCoway Air Purifier Airmega 200M True HEPA with 361 sq. ft. Coverage in Black-COWAY Air Purifiers for Large Room Whole Home Up to 2,640 ft², True HEPA Filter for Smoke, Allergies, Pet Dander, Odor, PM 10 AQI, Turbo Eco Mode, Timer, Energy Star, 3yr Warranty, Airmega 350 White-RGF REME Halo - REME-H in-Duct Ultraviolet Air Purifier for Dust, Particulates, and Bacteria CFM
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Customer ratings & reviews

4.2 out of 5 stars
stars78 ratings67 reviews
How item rating is calculated
  1. 5 stars69% (54)
  2. 4 stars14% (11)
  3. 3 stars4% (3)
  4. 2 stars1% (1)
  5. 1 star12% (9)

Reviews summary

Pros
  • : Setup process is straightforward.
  • : Has a visually pleasing exterior.
  • : Has a noticeable impact on indoor air quality.
  • : Reduces air particles and accumulation.
Neutral
  • : Can be affordable in the long run, but has a high initial investment.
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Showing 1-3 of 67 reviews

Oct 11, 2025
Jody
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!

Sep 4, 2025
Gary
Top Reviewer
Item details
Color: Graphite
Sold and shipped bySylvane
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
Sep 12, 2022
Colleen K
5 out of 5 stars review

Seller Verified Purchase

Can't believe we waited so long!

We live in the Sierra Nevada Mountains of California and go through months/weeks at a time where the smoke from forest fires can result in air quality in the 700-800's. What a game changer the Airmega is!! I wish I had ordered the Airmega 400S sooner! We love that it covers the entire house and is extremely quiet. Between the cats, dogs, forest fires and pollen, we were in need of cleaner air. If you are still trying to decide if an Airmega is worth getting, then wait no more! Order one today and you will not be disappointed.

Review from Coway USA
Helpful?3SLCUCE18QQS150937260