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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 76,555 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

Deal Score
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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 13, 2026 05:02 PM
21 Posts
Joined Dec 2008

This comment has been rated as unhelpful by Slickdeals users.

Feb 13, 2026 05:03 PM
194 Posts
Joined Apr 2016
swansong119Feb 13, 2026 05:03 PM
194 Posts
Quote from chrisaf69 :
Do you mind sharing a link to the filters you get?

I purchased this, and like my smaller coway iPod-looking-units for the bedrooms will get non-oem filters, but want decent ones even if they aren't the cheapest.

Thanks!
Not the person you asked but I use discountfilters.com, haven't noticed an issue, no weird smells. they have filters for a lot of different appliances and brands
Feb 13, 2026 05:13 PM
2,142 Posts
Joined Jul 2008
kfunk7Feb 13, 2026 05:13 PM
2,142 Posts
Quote from tntvu :
How often do you run them?
I have 2 of these at home also. I leave them on 24/7
Feb 13, 2026 05:37 PM
3,072 Posts
Joined Nov 2005
BrainDocFeb 13, 2026 05:37 PM
3,072 Posts

Our community has rated this post as helpful. If you agree, why not thank BrainDoc

I have one of these. It works very well. The only issue is that connecting it to WiFi is a hassle. You need to use the app to set it on schedules. Whenever power goes out (which is rare at my house, but it happens), it loses the WiFi connectivity and I have to do a hard reset and get it added back to the app. I have many "smart" devices and it's the only one that consistently gives me troubles.
2
1
Feb 13, 2026 06:22 PM
1,309 Posts
Joined Nov 2015
kjvmartinFeb 13, 2026 06:22 PM
1,309 Posts
We use the non WiFi version in our master bedroom. Smart mode during the day, run on high at night for white noise. Very good item.
Feb 13, 2026 06:47 PM
23 Posts
Joined Jan 2015
PhilG9974Feb 13, 2026 06:47 PM
23 Posts
Quote from wiebel03 :

It'd significantly reduce it, but you'll have to change the filters a lot more than the recommended amount
thanks!
1
Feb 13, 2026 07:15 PM
605 Posts
Joined Apr 2015
AegisXFeb 13, 2026 07:15 PM
605 Posts
Quote from SensibleMeal1392 :
I also have two in my house one for bedroom, one for main room and work well at circulating the air once an hour as advertised. filters are expensive. I vac the pre-filter screen but HEPA I replace twice a year. Keep in mind air sucks into both sides so there are 2x the filters to buy, they come in a pack of 2.
Are there third-party filter that you could use with? I have the previous AP-1512HH model and used some off brand filters that worked just fine.

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Feb 13, 2026 07:48 PM
605 Posts
Joined Apr 2015
AegisXFeb 13, 2026 07:48 PM
605 Posts
How much better is this compared to the older model Coway AP-2015F? My house is very dusty but that price tag keeps me away from this.
Feb 13, 2026 07:56 PM
4 Posts
Joined May 2021
HilariousRock6939Feb 13, 2026 07:56 PM
4 Posts
Good find! By the way, you can get the small CB incentives + avoid the sales tax if you do not live in CA, CT, FL, GA, IL, MD, MI, NV, NJ, NY, NC, PA, SC, TX, VA, WA, or DC by purchasing directly from cowaymega (same price).
1
Feb 13, 2026 11:08 PM
113 Posts
Joined Sep 2012
PatrickH2067Feb 13, 2026 11:08 PM
113 Posts

Our community has rated this post as helpful. If you agree, why not thank PatrickH2067

Quote from gabe23111 :
Have you ever tried aftermarket filters? I'm overdue to replace my filters and tempted to get aftermarket as it's less than a 3rd of the price right now vs the genuine. I noticed on the genuine filter [amazon.com] there are a nice handful of recent reviews complaining about a weird odor.
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.
3
Feb 14, 2026 12:28 AM
15,410 Posts
Joined Jan 2010
Ride_The_SkyFeb 14, 2026 12:28 AM
15,410 Posts
How many years have they been making them, I'm worried they moght stop making filters.
2
Feb 14, 2026 12:31 AM
15,410 Posts
Joined Jan 2010
Ride_The_SkyFeb 14, 2026 12:31 AM
15,410 Posts
By the way, juat ordered two. One for each floor. I doubt it can clear bedrooms from living room but I can move them around.
1
Feb 14, 2026 01:41 AM
275 Posts
Joined Aug 2011
Scott07Feb 14, 2026 01:41 AM
275 Posts
How's the 400 compare to the 350 and 450? Both have a higher CADR than the 400 but are cylindrical.
Feb 14, 2026 08:12 AM
4,648 Posts
Joined Jan 2004
exhurtFeb 14, 2026 08:12 AM
4,648 Posts

Our community has rated this post as helpful. If you agree, why not thank exhurt

I got one of these and they started producing an annoying hum or whine at low speeds.
1

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Feb 14, 2026 10:37 AM
291 Posts
Joined Sep 2020
ThriftyThread5737Feb 14, 2026 10:37 AM
291 Posts
I'll sell you one of these for $199 https://www.greenbuildingadvisor....ir-cleaner
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