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frontpagephoinix | Staff posted Feb 13, 2026 08:05 AM
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frontpagephoinix | Staff posted Feb 13, 2026 08:05 AM

Coway Airmega 400 True HEPA Smart Air Purifier (White)

+ Free Shipping

$349

$649

46% off
Amazon
132 Comments 76,526 Views
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Deal Details
Update: This popular deal is still available.

Amazon has Coway Airmega 400 True HEPA Smart Air Purifier (White) for $349. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.

Product Details:
  • Designed to clean spaces up to 3,120 sq. ft. in 60 minutes
  • 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
  • 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
  • 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
  • When the Airmega's built-in light and pollution sensors detect that the room has been dark and the air clean for 3 minutes, Sleep Mode reduces the purifier's noise and power consumption

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Deal:
    • Our research indicates that this deal is $183.00 less (34% savings) than the next best available price from a reputable merchant with prices starting at $532.00 at the time of this posting.
  • About this Product:
    • Rated 4.5 out of 5 stars at Amazon based on over 6,470 customer reviews.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Update: This popular deal is still available.

Amazon has Coway Airmega 400 True HEPA Smart Air Purifier (White) for $349. Shipping is free.

Thanks to Deal Hunter phoinix for sharing this deal.

Product Details:
  • Designed to clean spaces up to 3,120 sq. ft. in 60 minutes
  • 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
  • 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
  • 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
  • When the Airmega's built-in light and pollution sensors detect that the room has been dark and the air clean for 3 minutes, Sleep Mode reduces the purifier's noise and power consumption

Editor's Notes

Written by powerfuldoppler | Staff
  • About this Deal:
    • Our research indicates that this deal is $183.00 less (34% savings) than the next best available price from a reputable merchant with prices starting at $532.00 at the time of this posting.
  • About this Product:
    • Rated 4.5 out of 5 stars at Amazon based on over 6,470 customer reviews.
  • About this Store:
  • Additional Notes:
    • Please see the original post for additional details & give the WIKI and additional forum comments a read for helpful discussion.

Original Post

Written by phoinix | Staff

Community Voting

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Price Intelligence

Model: Coway Airmega 400 True HEPA Air Purifier with 1560 sq. ft. Coverage

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Top Comments

YwVJZXkD
355 Posts
57 Reputation
I like this unit, but one thing that I realized too late... there is no child lock feature, and these buttons are at child height, and they make fun sounds turn lights on and off.
PatrickH2067
113 Posts
17 Reputation
The aftermarkets aren't as good. No doubt about it. Less air flow because they have fewer pleats. I counted seven less pleats one time, and five less another time. In large rooms, or especially a whole house, this makes a difference. You will see dust in the air next to windows when you get further away from the filter.
This last time I spent the money on Coway filters and can say I am happier. ultimately worth the price. I can tell the air is 'lighter' when I change the filters. More so than when I'd change out to aftermarket. The carbon also lasts a LOT longer. There is a smell in the air when the carbon stops working. It's distinct. The carbon in the Coways easily last twice as long. But this isn't a deal breaker. As the carbon in the Coways don't last as long as the HEPA part either. You can give them a good shake, to extend the life of the carbon. Doing so introduces new cracks and crevices within the pieces of carbon for the air to filter through. Be sure the vacuum it first. Shake with the carbon part of the filter pointed down. And vacuum again afterwards. Because you will get carbon dust, it's just little pieces of charcoal, all in your HEPA, reducing the lifespan.
darren_fsl
183 Posts
34 Reputation
I have two of these 400 series (along with a Pro X and (4) 200Ms running all the time in my house (high air pollution where we live), and have no problem using non-OEM filters as replacements. They're fine. I seriously doubt that Coway makes their own HEPA filters; so they're likely sourcing them from China, too. Carbon pellets/filters don't last as long as the HEPA filters anyway, so you're only removing VOCs and smells for the first part of your filter life anyway. Like others have noted, just clean your filter screens often, vacuum or dust off the HEPA filter on the carbon side, and you'll get 9mos to a year.

132 Comments

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Feb 18, 2026 05:05 AM
5,721 Posts
Joined Jul 2006
g0dM@nFeb 18, 2026 05:05 AM
5,721 Posts
Quote from Impulse_shopper :
The aftermarket filters are trash. They don't even compare to the genuine filters. And the genuine filters are so expensive. I sold my 400s and just bought a couple Winix from Costco. This was a solid purifier though, just too expensive for upkeep for a single unit.
I have the winix also and the aftermarket filters have been cheap and great! Costs me $25 annual for a pack of these filters.
https://www.amazon.com/dp/B00LB22J78

I do like the unit on this deal. If filter cost is high, I won't bite. I'm fine with upfront cost for a nice unit, but the filter cost is what'll add up.
Feb 18, 2026 02:30 PM
452 Posts
Joined Mar 2015
jrwhite82Feb 18, 2026 02:30 PM
452 Posts
Would this work in a 3 level townhouse (1200sq ft) with open staircase?
1
Feb 18, 2026 03:54 PM
1,145 Posts
Joined Mar 2012
AtTheLeftThereFeb 18, 2026 03:54 PM
1,145 Posts
Paying even $350 for an air purifier is insane.
3
Pro
Feb 18, 2026 04:01 PM
337 Posts
Joined Nov 2015
EuphoriaFalcons
Pro
Feb 18, 2026 04:01 PM
337 Posts
How is this compared to AustinAir (except price)
1
Pro
Feb 18, 2026 04:01 PM
337 Posts
Joined Nov 2015
EuphoriaFalcons
Pro
Feb 18, 2026 04:01 PM
337 Posts
Quote from AtTheLeftThere :
Paying even $350 for an air purifier is insane.
I agree, look at austin air.. problem is with mold and toxic stuff in homes (from paints etc) , these are worth
Pro
Feb 18, 2026 04:05 PM
337 Posts
Joined Nov 2015
EuphoriaFalcons
Pro
Feb 18, 2026 04:05 PM
337 Posts
Quote from jrwhite82 :
Would this work in a 3 level townhouse (1200sq ft) with open staircase?
it might but ideally its recommended one for every floor
Feb 18, 2026 04:06 PM
46 Posts
Joined Dec 2023
MagentaSink1187Feb 18, 2026 04:06 PM
46 Posts
Quote from AtTheLeftThere :
Paying even $350 for an air purifier is insane.
small price to pay for your long-term health, don't you think?

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Feb 18, 2026 04:20 PM
397 Posts
Joined Jun 2012
ponicFeb 18, 2026 04:20 PM
397 Posts
Quote from jrwhite82 :
Would this work in a 3 level townhouse (1200sq ft) with open staircase?
Probably not satisfactorily. I would consider smaller units for each floor.
1
Feb 18, 2026 05:04 PM
46 Posts
Joined Dec 2023
MagentaSink1187Feb 18, 2026 05:04 PM
46 Posts
Quote from ponic :
Probably not satisfactorily. I would consider smaller units for each floor.
Doesn't do well between floors and enclosed spaces.
Honestly, if you have big rooms throughout your floors, get multiple of these devices.
Pro
Feb 18, 2026 07:09 PM
346 Posts
Joined Nov 2010
Strider007
Pro
Feb 18, 2026 07:09 PM
346 Posts
Good deal!
Feb 18, 2026 07:15 PM
1,460 Posts
Joined Nov 2013
NickB3364Feb 18, 2026 07:15 PM
1,460 Posts
This is the best air purifier I've ever owned. I've had one running almost 24/7 for the last 5 years, and the only time I've had an issue with it was when a toddler decided to put a bunch of Lego on top of it and a handful fell through. Easy enough to clean out though, and it was back in service pretty fast.

Would not hesitate to buy one of these again if I needed a 2nd.
2
Feb 18, 2026 07:22 PM
36 Posts
Joined Dec 2008
anutaFeb 18, 2026 07:22 PM
36 Posts
Luxury item, not for everyone unfortunately!
3
Feb 18, 2026 08:00 PM
126 Posts
Joined Aug 2020
Kennasaurus87Feb 18, 2026 08:00 PM
126 Posts
Quote from scubahead :
Crazy. I just looked at one of these in my local thrift shop, Saint Vincent DePaul. Brand spankin new, in box, original filters still wrapped in their plastic bags. They have a price tag on it $125. I'll take this as a sign. I should go retrieve it.
I'm jealous!
1
Feb 18, 2026 08:59 PM
1,233 Posts
Joined Sep 2017
slickdealgbFeb 18, 2026 08:59 PM
1,233 Posts
Quote from anuta :
Luxury item, not for everyone unfortunately!
Tough being poor.
3
4

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Feb 18, 2026 11:27 PM
968 Posts
Joined Jul 2010
misterv1Feb 18, 2026 11:27 PM
968 Posts
This or blue air?

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