I did a lot of review and research on air purifiers before purchasing this one. Although it is not the cheapest, it is also not the most expensive. I have a 1,200 square foot home with 2 large hypoallergenic dogs. There are only 2 of us here with the dogs so not a lot of dust being stirred up. However, we live in Florida and during the cooler months, like to leave the windows open and this is the time of year pollen is very high. We cook a lot at home and in a small house, odors can be overwhelming and linger.
Well, that is all over! This machine is amazing! In smart mode it senses air quality changes and adjusts it cleaning rate accordingly. Within an hour or so of the house smelling of bacon, or garlic/onions, the odors are gone. The dust on our furniture has decreased significantly. Pet odors have been all but eliminated.
The machine is small and unobtrusive. It is quiet most of the time but when on high can be a little noisy, about like a floor fan on high. That said, I think it kicked onto high once and for about 10 minutes. It is right next to our TV in the LR and I only had to increase the volume a tad to compensate.
Overall, great machine! Does what it says it will do and won't break the bank.
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Add to your order
- Coverage for accidental damage including drops, spills, and broken parts, as well as breakdowns (plans vary)
- 24/7 support when you need it.
- Quick, easy, and frustration-free claims.
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From the brand
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Our obsession with helping people live happier, healthier lives began in 1989.
Coway has become a global leader in intensive research, engineering and innovation, amassing over 5,000 intellectual property rights in all. We believe every element needs to be examined, researched, understood, tested and retested. We obsess over every detail, so Coway products can help transform your space into health sanctuary.
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From the manufacturer
Coway Airmega Premium Line-up
 Airmega 400(G) |  Airmega 400S / 400S(G) |  Airmega 300S |  Airmega 300 |  Airmega 250 |  Airmega Icon |  Airmega ProX | |
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Customer Reviews
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1,207
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Price
| $469.00 | $530.43 | $431.56 | $289.00 | $399.99 | $549.00 | $619.00 |
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Coverage
| 1,560 sq. ft. | 1,560 sq. ft. | 1,256 sq. ft. | 1,256 sq. ft. | 930 sq. ft. | 649 sq. ft. | 2,126 sq. ft. |
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App & Alexa & DRS
| ✘ | ✔ | ✔ | ✘ | ✘ | ✘ | ✘ |
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Auto Mode
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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Eco Mode
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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Sleep Mode
| Automatic | Automatic | Manual | Manual | Automatic | Automatic | Automatic |
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Rapid Mode
| ✘ | ✘ | ✘ | ✘ | ✔ | ✘ | ✔ |
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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 |
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Pollution Indicator
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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Filter Life Time Indicator
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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Manual Fan Speed
| Low, Medium, High | Low, Medium, High | Low, Medium, High | Low, Medium, High | Low, Medium, High | Low, Medium, High | Low, Medium, High |
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Timer & Scheduler
| Timer 1, 4, 8 Hr | Timer 1, 2, 4, 8 Hr, Scheduler | Timer 1, 2, 4, 8 Hr, Scheduler | Timer 1, 4, 8 Hr | Timer 1, 4, 8 Hr | Timer 1, 4, 8 Hr | N/A |
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Available Colors
| White/Graphite | White/Graphite | White | White | Beige | Beige | Mocha Beige |
Videos
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Videos for this product
3:55
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Coway Airmega 400 G Smart Air Purifier
Christina Nicci
Videos for this product
2:23
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This TRUE HEPA Air Purifier purifies the air from 2 sides!
athomeinmo
Videos for this product
1:20
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This Coway Airmega Air Purifier is GAME CHANGING!
Simply Stina
Videos for this product
0:40
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NEWEST NEED - Coway Airmega Smart Air Purifier
Newestneeds
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3:01
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DETAILED INFO BEFORE YOU BUY! How it's so SMART!
✅ The Lovely Place
Videos for this product
0:38
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When we say Airmegas put in work, we weren't lying!
Coway USA, Inc.
Compare with similar items
This Item  Coway COWAY Air Purifiers for Home Large Room Up to 3,120ft², 2 Sets of Washable Pre-Filters and True HEPA Filters for Smoke, Allergies, Pet Dander, Odor, AQI, Auto & Sleep Mode, Timer, 5yr Warranty, 400(G) |  |  |  |  |  | |
| Price | $469.00 | $399.99 | -15% $550.31 List: $649.00 | $244.76 | -9% $318.25 List: $349.99 | $62.14 |
| Delivery | — | Get it as soon as Saturday, Aug 3 | Get it as soon as Saturday, Aug 3 | Get it as soon as Saturday, Aug 3 | — | Get it as soon as Saturday, Aug 3 |
| Customer Ratings | ||||||
| Noise level | ||||||
| Easy to use | ||||||
| Sleep mode | ||||||
| Value for money | ||||||
| Sold By | Sylvane | Amazon.com | Amazon.com | Amazon.com | Del Tech Vista | Amazon Resale |
| filter type | True HEPA, Active Carbon Filter, Pre-Filter | True HEPA, Active Carbon Filter, Pre-Filter | True HEPA, Active Carbon Filter, Pre-Filter | True HEPA, Active Carbon Filter, Pre-Filter | HEPA | Pre-filter, H13 HEPA, Active Carbon |
| floor area | 1560 square feet | 930 square feet | 649 square feet | 975 square feet | 500 square feet | — |
| control method | touch | touch | touch | touch | touch | touch |
| power source | Corded Electric | AC | Corded Electric | Corded Electric | Electric | dc |
| particle retention size | 1560 square feet | 0.01 micron | 0.01 micron | 0.01 micron | — | — |
| noise level | 22 decibels | 22 decibels | 21.7 decibels | 20.6 decibels | — | 50 decibels |
| specification met | Energy Star Certified, CARB Certified, ETL Certified | Energy Star Certified, CARB Certified, ETL Certified | CARB Certified, ETL Certified | Energy Star Certified, CARB Certified, ETL Certified | HEPA Standard | Energy Star Certified |
Reviews with images
Fifth time customer
This is my 5th Coway Airmega purchase in appx 8 months. They are replacements for older units and also were necessitated by: post-construction, outside allergens and a pet household. I have 4 of the 400 versions and one AirMega Pro X. I love the 400 for the quiet steady performance. This unit has 2 HEPA filters on either side of the unit preceded by a washable pre-filter. The purifying capacity -drawing from both sides of the unit impresses me. Replacement filters are presently $90 range for a pair (2 filters - one for each side of the unit) -with the branded version and can run around $40 for aftermarket versions. Changing air filters is easy, intuitive and doesn’t involve touching accumulated layers of dust like my previous purifiers.My prior older air purifiers were clunky and a bit noisy. These units are aesthetically pleasing -somewhat MCM with their boxy look and furniture like legs and very quiet when run on smart mode. The smart setting is quiet until particulates are detected and then the unit kicks up into a higher fan mode to clear the air, going back to quiet mode when done. The LED ring at the front of the unit will turn from blue to magenta to bright red depending on the particulate density.The recent excellent reviews from Consumer Reports are just icing on the cake. Sale pricing can save $100 so keep an eye out for that.
Top reviews from the United States
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Reviewed in the United States on January 2, 2023
Update: 5/16/2023: Both purifiers I bought continue to perform well. They are quiet and effective. I’m still using the original filters and still have a lot of life left in them, despite leaving them on the smart setting with a medium fan setting 24/7. Excellent purchase for someone dealing with asthma and/or allergies, pets and wanting a well-built air purifier for cleaner air and better breathing.
Original review: I have asthma and allergies and have two dogs, and I wanted two well-designed, effective, stylish, large-capacity air purifiers for our great room and the master bedroom. These are very well constructed, easy to use, and effective. They have a set and forget feature that I really like. The pre-filters are easily cleaned with the vacuum brush attachment on your vacuum cleaner and the purifiers provide a cleaning indicator so you always know the status of the pre-filters. The main filters are very well made and are no doubt very effective and long lasting (I have not yet had to replace them and believe they’ll go a year before that is required.) I highly recommend these air purifiers to anyone wanting cleaner air, fewer dust bunnies, and less pet dander in the home. I set them, so they run when needed and shut off when the air is clean. I turn off the light before sleeping and they continue to perform as needed 24 hours a day. I’m very pleased with these and believe they contribute to better health.
Excellent, Stylish and Quiet Air Purifiers
Reviewed in the United States on January 2, 2023
Update: It’s been over a year and I’ve replaced the filters once. The prefilters require regular cleaning, but the purifiers provide a status light to ensure you know when it is required. These continue to perform extremely well and I remain very happy with their effectiveness at removing dust and allergens from the air.Reviewed in the United States on January 2, 2023
Update: 5/16/2023: Both purifiers I bought continue to perform well. They are quiet and effective. I’m still using the original filters and still have a lot of life left in them, despite leaving them on the smart setting with a medium fan setting 24/7. Excellent purchase for someone dealing with asthma and/or allergies, pets and wanting a well-built air purifier for cleaner air and better breathing.
Original review: I have asthma and allergies and have two dogs, and I wanted two well-designed, effective, stylish, large-capacity air purifiers for our great room and the master bedroom. These are very well constructed, easy to use, and effective. They have a set and forget feature that I really like. The pre-filters are easily cleaned with the vacuum brush attachment on your vacuum cleaner and the purifiers provide a cleaning indicator so you always know the status of the pre-filters. The main filters are very well made and are no doubt very effective and long lasting (I have not yet had to replace them and believe they’ll go a year before that is required.) I highly recommend these air purifiers to anyone wanting cleaner air, fewer dust bunnies, and less pet dander in the home. I set them, so they run when needed and shut off when the air is clean. I turn off the light before sleeping and they continue to perform as needed 24 hours a day. I’m very pleased with these and believe they contribute to better health.
Images in this review
Reviewed in the United States on July 6, 2024
