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expired Posted by george8880 • Nov 22, 2021
expired Posted by george8880 • Nov 22, 2021

Amazon: Coway Airmega 400S Smart Air Filter (Amazon Alexa, Google Home) $374.72

$375

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All-time low price on the Coway Airmega 400S air filter.

Coway Airmega 400S has a 430 CADR, and this deal gets 1.15 CADR / $, which is comparable to the gold standard (Coway AP-1512HH and Blueair models) but with the added benefit of smart home connection. No brainer if you are looking for a large-size air filter with a side bonus of smart home integration.

Edit: Adding some supporting data points:
  • Coway AP-1512HH Mighty:
    • 260 CADR / $170.05 @ BF Sale Price = 1.53 CADR / $
    • 260 CAGR / $229.99 @ Regular Price = 1.13 CADR / $
  • Blue Air 211+:
    • 350 CADR / $299.99 = 1.17 CADR / $
http://www.amazon.com/AIRMEGA-Sma...B01C9RIAFS
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Deal Details
Community Notes
About the Poster
All-time low price on the Coway Airmega 400S air filter.

Coway Airmega 400S has a 430 CADR, and this deal gets 1.15 CADR / $, which is comparable to the gold standard (Coway AP-1512HH and Blueair models) but with the added benefit of smart home connection. No brainer if you are looking for a large-size air filter with a side bonus of smart home integration.

Edit: Adding some supporting data points:
  • Coway AP-1512HH Mighty:
    • 260 CADR / $170.05 @ BF Sale Price = 1.53 CADR / $
    • 260 CAGR / $229.99 @ Regular Price = 1.13 CADR / $
  • Blue Air 211+:
    • 350 CADR / $299.99 = 1.17 CADR / $
http://www.amazon.com/AIRMEGA-Sma...B01C9RIAFS

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Model: Airmega 400S The Smarter App Enabled Air Purifier - White

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Sort: Lowest to Highest | Last Updated 7/6/2025, 10:36 AM
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20 Comments

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Nov 22, 2021
50 Posts
Joined Oct 2020
Nov 22, 2021
NavySardine3881
Nov 22, 2021
50 Posts
Not a deal. I've had both the white and black version if this purifier in my save for later for a few months and the price hasn't changed.
3
Original Poster
Nov 22, 2021
8 Posts
Joined Feb 2017
Nov 22, 2021
george8880
Original Poster
Nov 22, 2021
8 Posts
Quote from NavySardine3881 :
Not a deal. I've had both the white and black version if this purifier in my save for later for a few months and the price hasn't changed.
Huh? It is literally the lowest ever. https://urlhasbeenblocked/product/B01C9RIAFS (Edit: camelcamelcamel link blocked)

Are you looking at the 300 or 400 instead of the 400S?
Nov 24, 2021
185 Posts
Joined Nov 2020
Nov 24, 2021
BraveSpaniel9510
Nov 24, 2021
185 Posts
Quote from NavySardine3881 :
Not a deal. I've had both the white and black version if this purifier in my save for later for a few months and the price hasn't changed.
I have the graphite version that I bought earlier this year for a little bit less than this. At this price, this is a great deal. I have the air mega 200 which is amazing as well as the 400. The 400s so quiet and moves a ton of air. I highly recommend this air purifier. Truly is the best one on the market.
Pro
Nov 24, 2021
9,343 Posts
Joined Dec 2013
Nov 24, 2021
doboy007
Pro
Nov 24, 2021
9,343 Posts
I got the 300S for similar price 2+ years ago. The app function is decent but slow.
Nov 25, 2021
353 Posts
Joined Jun 2015
Nov 25, 2021
Xyber1
Nov 25, 2021
353 Posts
This is a great deal OP. I had a Camelcamelcamel alert if the price ever dropped below $400 and I ended up buying another 4 for my home and another 8 for my business.

Coway makes great purifiers, I've gone through many different brands but the volume of air a 1512 does blows away Winix and all competition and the Airmega is two 1512 combined and a lot quieter. The 1,500 sq ft is a bit of an exaggeration, at 4 air changes an hour it's more like 700 sq far but bang for your buck it's the best purifier you can buy.
Nov 25, 2021
1,323 Posts
Joined Oct 2009
Nov 25, 2021
aragorn2000
Nov 25, 2021
1,323 Posts
I am seeing $350 for the white one
Nov 25, 2021
281 Posts
Joined Feb 2009
Nov 25, 2021
Ambassador_Minimum
Nov 25, 2021
281 Posts
How does this compare to air purifiers like the Dyson TP02

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Nov 25, 2021
583 Posts
Joined Jun 2011
Nov 25, 2021
arcanition
Nov 25, 2021
583 Posts
I am using both the Coway AP-1512HH Mighty and the Winix C535 purifier, both of which I bought on sale for $100 and are similar in performance. I would recommend those before someone spends almost 4x on this.
1
Nov 25, 2021
2,443 Posts
Joined Dec 2008
Nov 25, 2021
the.barbrR
Nov 25, 2021
2,443 Posts
I bought this back in September for 496 in Graphite at Walmart...this is a good deal. Pretty quiet and the app is pretty straightforward and responsive
Last edited by the.barbrR November 25, 2021 at 01:16 AM.
Nov 25, 2021
178 Posts
Joined Jul 2009
Nov 25, 2021
johnsmiht11111
Nov 25, 2021
178 Posts
Quote from arcanition :
I am using both the Coway AP-1512HH Mighty and the Winix C535 purifier, both of which I bought on sale for $100 and are similar in performance. I would recommend those before someone spends almost 4x on this.
They cover different size rooms. Not comparable at all.
1
Nov 25, 2021
482 Posts
Joined Jan 2008
Nov 25, 2021
blueis300
Nov 25, 2021
482 Posts
Quote from george8880 :
Huh? It is literally the lowest ever. https://urlhasbeenblocked/product/B01C9RIAFS (Edit: camelcamelcamel link blocked)

Are you looking at the 300 or 400 instead of the 400S?
Right. 400s model hasn't been this low. And this price is for the white color. Not the Black one as posted.
Nov 25, 2021
65 Posts
Joined Aug 2013
Nov 25, 2021
K1llerICE
Nov 25, 2021
65 Posts
Was able to grab the 400S white one for $350 via Amazon 3rd party seller.
Nov 26, 2021
117 Posts
Joined Nov 2018
Nov 26, 2021
dperolio
Nov 26, 2021
117 Posts
I went with the Mila (https://milacares.com) recently. Looks like the better choice for rooms up to 1000 square feet from what I've read/seen. It's also 15% off right now. But if you need the larger room size, this one's going to be better.
Nov 26, 2021
129 Posts
Joined Nov 2017
Nov 26, 2021
lane32x
Nov 26, 2021
129 Posts
This is nearing the price of a RabbitAir, which is a much better brand and has excellent filtration.

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Nov 26, 2021
882 Posts
Joined Jul 2018
Nov 26, 2021
CrimsonFeather4345
Nov 26, 2021
882 Posts
Quote from arcanition :
I am using both the Coway AP-1512HH Mighty and the Winix C535 purifier, both of which I bought on sale for $100 and are similar in performance. I would recommend those before someone spends almost 4x on this.
Agree. Two Mightys also rebadged as Airmega with a different front grill, for $129 each, is better if you don't need the WiFi function. Super energy efficient, silent on medium setting, oem filters work and are inexpensive. https://slickdeals.net/f/15428041-coway-airmega-200m-true-hepa-air-purifier-with-361-sq-ft-coverage-in-black-ap-1518r-129-starting-at-7pm?src=SiteSearchV2Algo1

Winix is good too but doesn't collect nearly as much dust, side-by-side, in my home. I have 3 Winix and 3 Coway. Winix units don't seem to be sealed well, use more electricity and the life span is shorter in my experience.

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