Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Heads up, this deal has expired. Want to create a deal alert for this item?
expired Posted by GByDesign • Mar 15, 2022
expired Posted by GByDesign • Mar 15, 2022

Coway Airmega 400S Smart True HEPA Air Purifier (White, Covers 1560 sq. ft.)

+ Free Shipping

$383

$450

14% off
Amazon
212 Comments 155,067 Views
Visit Amazon
Good Deal
Save
Share
Deal Details
Update: This popular deal is still available

Amazon.com has Coway Airmega 400S Smart True HEPA Air Purifier (White, Covers 1560 sq. ft.) for $382.50. Shipping is free.

Thanks to community member Gordonbydesign for finding this deal.

About this item:
  • Coway Airmega 400S is designed to accommodate large room sizes up to 1, 560 square feet and cleans the air at least two times per hour when used as recommended.
  • Coway Airmega Max2 filter – combined activated carbon and True HEPA filter – captures and reduces up to 99.97% of particles 0.3 microns in the air, including pollen, pollutants and other allergens. It also reduces more than 99% of volatile organic compounds and reduces fumes such as NH3 and CH3CHO. It also includes washable and permanent pre-filter to catch larger dust particles.

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by GByDesign
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Update: This popular deal is still available

Amazon.com has Coway Airmega 400S Smart True HEPA Air Purifier (White, Covers 1560 sq. ft.) for $382.50. Shipping is free.

Thanks to community member Gordonbydesign for finding this deal.

About this item:
  • Coway Airmega 400S is designed to accommodate large room sizes up to 1, 560 square feet and cleans the air at least two times per hour when used as recommended.
  • Coway Airmega Max2 filter – combined activated carbon and True HEPA filter – captures and reduces up to 99.97% of particles 0.3 microns in the air, including pollen, pollutants and other allergens. It also reduces more than 99% of volatile organic compounds and reduces fumes such as NH3 and CH3CHO. It also includes washable and permanent pre-filter to catch larger dust particles.

Editor's Notes

Written by megakimcheelove | Staff

Original Post

Written by GByDesign

Community Voting

Deal Score
+135
Good Deal
Visit Amazon

Price Intelligence

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

Deal History 

Sale Price
Slickdeal
  • $300
  • $500
  • $700
  • $900
  • Today
  • 5/26
  • 4/18
  • 3/11
  • 2/1
  • 12/25
  • 11/17
  • 10/10
  • 9/2
  • 7/26
  • 6/18
  • 5/11
  • 4/3
  • 2025

Current Prices

Sort: Lowest to Highest | Last Updated 7/3/2025, 10:46 AM
Sold By Sale Price
Amazon$529.99

Leave a Comment

Unregistered (You)


Your comment cannot be blank.

Top Comments

radejs
148 Posts
57 Reputation
FYI Air cleaners are Health Savings Account allowed purchases
ryewoods
398 Posts
97 Reputation
Very good user reviews, but Consumer Reports generally rates Coway models middlingly. They reviewed the slightly smaller Airmega 300 and found it was only Fair at removing dust, pollen, and smoke on Low speed. They also dinged it for being a little loud on High. It was Excellent at removing dust, pollen, and smoke on High speed. Competing models from Samsung, Blueair, and Alen rank higher. I've found CR reviews to not always reflect actual real life performance, so take it for what you will.
AlanG6671
14 Posts
10 Reputation
My girlfriend was always sniffling(bad allergies) and I was always snoring. I got 3 of these (1/2/basement) and I just bought another one for her office. These things have made us breathe better and live better. Love them.

211 Comments

Sign up for a Slickdeals account to remove this ad.

Original Poster
Mar 15, 2022
777 Posts
Joined Apr 2010
Mar 15, 2022
GByDesign
Original Poster
Mar 15, 2022
777 Posts
You linked to the 400, not the S but they're both priced the same right now
Mar 15, 2022
2,191 Posts
Joined Nov 2018
Mar 15, 2022
Gt7737
Mar 15, 2022
2,191 Posts
Quote from Gordonbydesign :
You linked to the 400, not the S but they're both priced the same right now
Thank you ! I assumed "s" and smart would have been the same .. especially with the same reviews . Guess not
Original Poster
Mar 15, 2022
777 Posts
Joined Apr 2010
Mar 15, 2022
GByDesign
Original Poster
Mar 15, 2022
777 Posts
Quote from Gt7737 :
Thank you ! I assumed "s" and smart would have been the same .. especially with the same reviews . Guess not
400 is older model, it is 'smart,' but not wifi capable
Mar 15, 2022
104 Posts
Joined Dec 2019
Mar 15, 2022
ejwill
Mar 15, 2022
104 Posts
I've been debating this or Mila
1
Mar 15, 2022
125 Posts
Joined Dec 2017
Mar 15, 2022
Talontd
Mar 15, 2022
125 Posts
Delivery date is showing as April 12th for me..
2
Mar 15, 2022
1,015 Posts
Joined Oct 2007
Mar 15, 2022
MikeyMike01
Mar 15, 2022
1,015 Posts
What's the value in the smart connection?
Original Poster
Mar 15, 2022
777 Posts
Joined Apr 2010
Mar 15, 2022
GByDesign
Original Poster
Mar 15, 2022
777 Posts
Quote from MikeyMike01 :
What's the value in the smart connection?
"Smart mode with three settings, Coway Airmega smart air purifier adapts to its surroundings. Fan speed automatically adjusts based on the room's air quality and lighting conditions to improve air quality."
1

Sign up for a Slickdeals account to remove this ad.

Mar 15, 2022
466 Posts
Joined Apr 2005
Mar 15, 2022
lapchern
Mar 15, 2022
466 Posts
Why should I pay triple over a winix?
3
Mar 15, 2022
3,547 Posts
Joined Apr 2011
Mar 15, 2022
kida182001
Mar 15, 2022
3,547 Posts
Quote from lapchern :
Why should I pay triple over a winix?
If you're referring to the one that sometimes go on sale at Costco, this is more powerful and covers three times more square footage, supposedly.
Last edited by kida182001 March 15, 2022 at 05:53 PM.
Mar 15, 2022
707 Posts
Joined Jan 2010
Mar 15, 2022
brokt
Mar 15, 2022
707 Posts
We live in a 1,350 square foot rambler. Would this cover the whole house? Or would it make more sense to buy a few smaller purifiers?
Mar 15, 2022
1,989 Posts
Joined Jun 2007
Mar 15, 2022
ilovecanada
Mar 15, 2022
1,989 Posts
Quote from MikeyMike01 :
What's the value in the smart connection?
I got it over the other model specifically for the scheduling feature. I believe the base model has a timer but I like setting a schedule and forgetting it. Especially if they are both the same price go for the S
Mar 15, 2022
14 Posts
Joined Mar 2013
Mar 15, 2022
AlanG6671
Mar 15, 2022
14 Posts
My girlfriend was always sniffling(bad allergies) and I was always snoring. I got 3 of these (1/2/basement) and I just bought another one for her office. These things have made us breathe better and live better. Love them.
1
Mar 15, 2022
284 Posts
Joined Apr 2005
Mar 15, 2022
Vascodegama
Mar 15, 2022
284 Posts
Quote from ilovecanada :
I got it over the other model specifically for the scheduling feature. I believe the base model has a timer but I like setting a schedule and forgetting it. Especially if they are both the same price go for the S
Scheduling is key. You don't need it running 24/7 unless you wfh in a studio apartment.
Mar 15, 2022
466 Posts
Joined Apr 2005
Mar 15, 2022
lapchern
Mar 15, 2022
466 Posts
Quote from kida182001 :
If you're referring to the one that sometimes go on sale on Costco, this is more powerful and covers three times more square footage, supposedly.
Yeah that's what I was referring to, thanks! So I guess this would be better for a living room.

Sign up for a Slickdeals account to remove this ad.

Mar 15, 2022
185 Posts
Joined Nov 2020
Mar 15, 2022
BraveSpaniel9510
Mar 15, 2022
185 Posts
We bought the 400 about 9 months ago and love it. This one literally keeps the whole open floorplan clean. We use to be able to watch the dust in the air when the sun hit just right. Haven't had that anymore.

We have the base model that you can set on smart mode. It will automatically adjust based on what's in the air. You can also change the sensitivity of the sensor that picks everything up. The smart app compatible is really a waste unless you just want to check it on your phone.
Last edited by BraveSpaniel9510 March 15, 2022 at 04:22 PM.

Leave a Comment

Unregistered (You)


Your comment cannot be blank.

Popular Deals

View All

Trending Deals

View All