Coway Air Purifier Airmega 400 White True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement Indicator
Coway Air Purifier Airmega 400 White True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement Indicator
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Coway Air Purifier Airmega 400 White True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement Indicator

4.5 stars out of 160 reviews
(4.5)|
160 ratings
Coway Air Purifier Airmega 400 White True HEPA Air Purifier with 1560 sq ft Coverage, Auto, Eco, & Sleep Mode, Air Quality & Filter Replacement IndicatorCoway Air Purifier Airmega 400 White True HEPA Air Purifier 1560 sq ft Coverage Auto Eco Sleep Mode Air Quality Filter Replacement IndicatorCoway Air Purifier Airmega 400 Graphite True HEPA Air Purifier 1560 sq ft Coverage Auto Eco Sleep Mode Air Quality Filter Replacement Indicator
Actual Color:White-Out of stock
Graphite/Silver, $649.00
selected, White, $499.99, Out of stock

Key item features

  • Large Coverage: Designed for large rooms up to 1,560 square feet, cleaning the air at least twice per hour.
  • HyperCaptive Filtration: Combines activated carbon and True HEPA filter to capture and reduce up to 99.999% of particles as small as 0.01 microns.
  • Air Quality Monitor: Real-time air quality monitor adjusts fan and purification levels based on the air quality.
  • Multiple Fan Modes: Features five fan modes: Smart, Sleep, Low, Medium, and High, with noise levels as low as 43.2 dB at the highest setting.
  • Energy Efficient: Smart mode adapts to surroundings, adjusting fan speed based on air quality and lighting conditions, consuming only 64 watts.
  • Filter Replacement Indicator: Intuitive indicator lights up when filters need changing, eliminating the need for manual tracking.
  • Timer Settings: Includes a timer with 1, 2, 4, and 8-hour settings for customizable operation.
  • Eco-Friendly: Energy Star certified, ensuring efficient energy consumption.
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Current price is $499.99
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Customer ratings & reviews

4.5 out of 5 stars
stars160 ratings146 reviews
How item rating is calculated
  1. 5 stars83% (132)
  2. 4 stars4% (7)
  3. 3 stars4% (6)
  4. 2 stars3% (4)
  5. 1 star7% (11)

Reviews summary

Pros
  • : Has a modern design that fits well in living spaces.
  • : Operates at a nearly imperceptible sound level.
  • : Setup is straightforward with clear instructions.
  • : Captures strong odors from various sources.
Neutral
  • : Can capture dust effectively, but may accumulate it on exterior.
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Showing 1-3 of 146 reviews

Oct 15, 2025
Core
5 out of 5 stars review

Seller Verified Purchase

The BEST air filters available.

Airmegas. I've had over the top air filters that pretty much do nothing more than the bottom of the line air filters. Air filters are quite simple, air in, filter, air out. How this is accomplished is what matters. I love Coway's Airmegas for 1. THE PRE FILTER SCREEN. It is ever so easy to take out. Magnetic side panels and simple click fins make it easy to clean and put it back in -- makes for weekly cleaning ease. It's incredible how much large particles these catch and how much longer a pre-filter screen can keep your pleated and carbon HEPA filter's life going longer and stronger. After you own an air filter with a pre-filter screen you can't go back to one without. 2. AFFORDABLE AND ROBUST HEPA FILTER. Just pop in a replacement cartridge every 6-9 months (depending on your situation) -- be sure to get genuine Coway brand. 3. QUIET function of these air filters, no matter what mode they are in = quiet. 4. NO WIFI (like do we need EVERYTHING connected? - no). 5. DESIGN...the design the design; actually looks good in your home. 6. FABRIC CORD, a tiny but lovely detail. 7. LIGHTS OFF OPTION on the air filter (the little level dots stay on but easy to cover. 8. LIFT SIDE HANDLE GROOVES on each side panel make it a breeze to move. 9. SUPER PACKING of the units. I have four of these, I've tried so many others. None compare and no damage in shipping. 10. THEY WORK. You will notice a difference in your home's air quality.

Review from Coway USA
Helpful?4DA6UFF7VAJQ100994024
reply from Customer Service

Wow—thank you for such a thorough and passionate review! We’re genuinely honored that the Airmega 400 has earned a place in your home (times four!). You’ve captured exactly what we strive for: thoughtful design, reliable performance, and user-friendly features that make a real difference. From the magnetic pre-filter panels to the quiet operation and fabric cord, it’s clear you’ve noticed the small details we obsess over. We especially appreciate your shoutout to the simplicity and effectiveness of the filtration system—air in, air out, done right. Thank you for being such a dedicated Airmega advocate. We’re so glad it’s helping you breathe easier!

Apr 8, 2025
Jarofclay63
5 out of 5 stars review

Seller Verified Purchase

Great Product

I love this purifier. It is SOOO much quieter than my BlueAir and very easy to clean. I have used the Airmega 300 for my bedroom and so purchasing this Airmega 400 was a no brainer. What made the purchase even more attractive was the sale price. I would recommend this and similar Coway purifiers to anyone who suffers from allergies, or who just works around a lot of dirt/dust.

Review from Coway USA
Helpful?4DA6UFF7VAJQ100994024
reply from Customer Service

Thank you for your glowing review of the Airmega 400! We’re thrilled to hear that its quiet operation and easy-to-clean design have impressed you, and it’s wonderful to know that your experience with the Airmega 300 made this purchase a natural choice. We're delighted that the sale price added to the appeal, and we truly appreciate your recommendation to others who may benefit from its exceptional performance. Your feedback means so much to us, and we’re grateful for your trust in Coway products. If you ever have any questions or need assistance, we’re always here to help. Thank you for being a loyal customer and for sharing your positive experience! Best regards, Coway USA

Oct 30, 2025
Glenn
5 out of 5 stars review

Seller Verified Purchase

Magic!

This device is amazing. I was a sceptic and it's proven me wrong with its black magic. Pass gas nearby… it kicks into gear. Burn your toast… say goodbye to smells. The filters show me just how much dirt and dust it's removing. It is so easy to use, easy to setup, and makes me feel so much more confident in the health of my home.

Review from Coway USA
Helpful?4DA6UFF7VAJQ100994024
reply from Customer Service

Thank you for sharing such a fun and thoughtful review of the Airmega 400! We’re thrilled to hear that it’s exceeded your expectations and proven its value in keeping your home fresh and clean. From tackling everyday odors to showing just how much dust and dirt it removes, it’s great to know the purifier has made such a noticeable difference. We’re delighted that setup and use have been easy and that it’s given you more confidence in the health of your home. If you ever have questions or need support, please don’t hesitate to reach out to us at Info@cowaymega.com. We truly appreciate your trust in Coway.