Coway Airmega 400 Smart Air Purifier: Clean Air for Up to 1,560 sq. ft. of Space, White

Ryan: The purifier itself is unreal but like many reviews the WiFi connection on this this is garbage, right next to the modem and it drops constantly. Save yourself the money and get the regular version it's ann easy 5 star.

Also don't follow the image for connecting WiFi if you get this one you actually have to push the WiFi and light logo not the buttons like it says

Canada on Sep 21, 2023

Amazon Customer: I purchased this product because I moved into a loft building and the place was smelling a touch less than fresh. I’ve had the unit running for about 4 weeks now and I can notice a significant difference in the place. A fluke discovery I made this week and is what prompted me to write the review, was I fried some fish on the stove top and within 5 mins, the indication on the unit changed to a yellow orange colour to signify it has detected contaminates in the air. After about an hour and half, the indicator was back to green blue and you couldn’t smell a single odour from the dinner, absolutely amazing (Ive repeated this twice with alternate foods and same results).
*Sound is equivalent to a standard oscillating fan, not bad at all.
*Build quality - excellent
*User Friendly - excellent

Canada on Aug 14, 2023

Alex Diamantopulo: I bought this filter in 2021 and it is always on since then.
I am monitoring my air quality with a separate tool and I can see a huge change with this filter on 27/7.
I also like the remote control option, it works with Home Assistant.
My only comment to manufacturer: PLEASE stop forcing people to use cloud services. It would be great to have an option to set it up locally with Home Assistant, without using cloud services.

Canada on Jul 01, 2023

jean huot: Quiet, large and thick filters. Does not show exact ppm, but indicates good, moderate, unhealthy and very unhealthy. Fairly big unit compared to competition. Well built. Des not use bluetooth., but i guess can be monitored remotely via internet. Got it on sale, but would not pay full price. PreFilter is at 96% current state and hepa filter at 100%. Carbon filter integrated with hepa filter. Easy access to filters. Granular carbon filter; more efficient. Intelligent fan speed control increases speed when there is more pollution. Wish I had it last week when polution was at a high level indoor.

Canada on Jun 30, 2023

Self Analysis: The filter itself has provided phenomenal filtration for approx. 600 sq ft space. The circular LED particle display is very sensitive to report dust or humidity passing inside the sensor with different colors. The filters themselves are obviously made with the highest quality, and are multi-stage and readily suck up smoke, most smells and dust. The circular indicator goes yellow or red when it detects particles and gradually absorbs the particulates until the indicators returns to the reassuring "blue-green" color.

I bought this to combat smells migrating from a neighbor in the unit below. It does a valiant job. The neighbor is a formidable foe, however. So I don't fault the unit. The filters are quite expensive. The filter has last months so far, and the LED filter life indicator suggests it is half expended. I have cleaned the fine metal screens, running them under water to rinse off dust rather than letting it go airborne again. The clean-the-metal-screen indicator activates pretty often—about once a week—which is more than I would expect. It is not a big chore, but I didn't know I would have a job to do to maintain the filter, albeit minor. Air quality has been...

United States on May 15, 2023

Don GauthierDon Gauthier: After an enormous amount of research, decided on this unit for a large open space ~1000’sq. Looks good, and feels of high build quality.

This purifier moves a lot of air on its Max setting, and you can feel the air movement from several feet away. It blows upward, so not a breeze like from a fan, but a gentle air movement circles the room. It’s also very quiet. In low you cannot hear anything, even standing beside the purifier. Medium adds a little white noise to the room. High is noticeable, but not a nuisance.

Pros: “Smart” air purifier boasting a high CADR, attractive unit, solid build quality, decent price, and dual 12-month HEPA filters make this a smart investment. Dual handles make this easily manoeuvrable.

Cons: Filter availability.

The App: The app is decent, not great. It’s basically a remote control (on/off, fan speed) with a custom schedule builder if you don’t want the Auto mode enabled. Offers filter life indicators/notifications as well as indicators/notifications when to wash the pre-filter filters. Air Quality Index (AQI) is not available in North America.

If the 400S (“S” = Smart) is a few bucks more than the 400...

Canada on Jan 06, 2022

kamiraakamiraa: First off this filter is very large and the filters within it are huge in comparison to other competitors (Detailing Honeywell AirGenius 4 / 5 , Honeywell HEPA HPA300, and Molekule below). Check out the overall measurements of the unit before ordering it - 15" by 15" by 23" tall.

First off, this purifier is BIG, and has TWO LARGE HEPA / Charcoal filters on each side. The HEPA will remove 99%+ of air contaminates and the Charcoal will scrub any smell. Do you have dogs or live in an area with bad air quality? Get this! The only downside is that the filters need to be replaced once a year and typically around $120 for the full set, you dispose the old ones. But when it comes to health . . . just do it. I had "Cleanable" filters in the past such as the Honeywell AirGenius 4 & 5 , let me say when you have to do it 4 times a year, I rather just pay $120 for the set. It typically takes 45 minutes each time to clean the AirGenius and about 4-5 hours to dry.

The Coway Airmega 400s purifier also has a fine mesh pre-filter on each side of the unit (before the main HEPA / Charcoal). It is VERY fine, and is meant to capture hair and other items (heavy dust). These do not need...

United States on Apr 23, 2019