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Coway Airmega 400S App-Enabled Smart Technology Compatible with Amazon Alexa True HEPA Air Purifier, Covers 1,560 sq.ft, White

4.6 4.6 out of 5 stars 5,990 ratings

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400S WHITE
Air Purifier

Purchase options and add-ons

Color White
Brand Coway
Product Dimensions 14.8"D x 14.8"W x 22.8"H
Floor Area 1560 Square Feet
Specification Met Energy Star Certified
Power Source
Corded Electric
Item Weight
24.7 Pounds
Control Method
Voice
Filter Type
True HEPA, Active Carbon Filter, Pre-Filter

About this item

  • [Coverage] Designed to clean spaces up to 1,560 sq. ft. in 30 minutes
  • [HyperCaptive Filtration System] Combination of a pre-filter, deodorization filter, and True HEPA Filter reduces 99.999% of 0.01-micron particles, including pollen and other allergens. It also reduces 99% of volatile organic compounds and odor
  • [APP and Voice Control] IoCare mobile app includes indoor and outdoor air quality monitoring, filter notification, scheduling, and speed and smart mode control. Coway Airmega also works with Amazon Alexa and Dash Replenishment
  • [Smart Mode] 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
  • [Eco Mdoe] 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
  • [Sleep Mode] 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
  • [Filter Alerts] The air filter indicator tells you when the filters need to be replaced and the prefilters need to be cleaned for maximum efficiency, based on how much air they have processed

Customer ratings by feature

Easy to clean
4.7 4.7
Easy to use
4.6 4.6
Sleep mode
4.5 4.5
Noise level
4.4 4.4

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Coway Airmega 400S App-Enabled Smart Technology Compatible with Amazon Alexa True HEPA Air Purifier, Covers 1,560 sq.ft, White
Coway Airmega 400S App-Enabled Smart Technology Compatible with Amazon Alexa True HEPA Air Purifier, Covers 1,560 sq.ft, White
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Price$505.06-18% $575.45
List:$699.00
$189.99$599.00$499.99-21% $315.36
List:$399.00
Delivery
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Get it as soon as Tuesday, Apr 2
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Customer Ratings
Easy to use
4.6
4.7
4.7
4.0
Sleep mode
4.5
4.6
4.6
4.6
Noise level
4.4
4.5
4.5
4.5
Sold By
Amazon.com
Amazon.com
Amazon.com
Smarter HEPA
Amazon.com
Amazon.com
filter type
True HEPA, Active Carbon Filter, Pre-Filter
Pre-Filter
HEPA
H13 99.97% HEPA Filter (ASIN: B09SK7R7KT)
True HEPA, Active Carbon Filter, Pre-Filter
floor area
1560 square feet
1900 square feet
3075 square feet
2790 square feet
930 square feet
control method
voice
voice
application
touch
application
touch
power source
Corded Electric
Battery Powered
AC
AC
ac
AC
particle retention size
0.01 micrometer
0.3 micrometer
2.5 micrometer
0.3 micron
0.01 micrometer
noise level
22 decibels
24 decibels
49 decibels
24 decibels
22 decibels
specification met
Energy Star Certified
CARB Certified
CARB Certified
Energy Star Certified, CARB Certified, ETL Certified
weight
24.7 pounds
19.2 pounds
13.2 pounds
1.68 kilograms
20.5 pounds

From the brand

Product guides and documents


From the manufacturer

Airmega 400S

Coway Airmega Premium Line-up

400S

Airmega 400S

400

Airmega 400

airmega app

Airmega 300S

300

Airmega 300

250S

Airmega 250S

IconS

Airmega IconS

proX

Airmega ProX

Customer Reviews
4.6 out of 5 stars
5,990
4.6 out of 5 stars
5,990
4.6 out of 5 stars
5,990
4.6 out of 5 stars
5,990
4.5 out of 5 stars
779
5.0 out of 5 stars
11
4.6 out of 5 stars
5,990
Coverage
1,560 sq. ft. 1,560 sq. ft. 1,256 sq. ft. 1,256 sq. ft. 930 sq. ft. 649 sq. ft. 2,126 sq. ft.
App & Alexa & DRS
Auto Mode
Eco Mode
Sleep Mode
Automatic Automatic Manual Manual Automatic Automatic Automatic
Rapid Mode
Filters Configuration
Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA Pre-Filter+ Carbon + True HEPA
Pollution Indicator
Filter Life Time Indicator
Manual Fan Speed
Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High Low, Medium, High
Timer & Scheduler
Timer 1, 2, 4, 8 Hr, Scheduler Timer 1, 4, 8 Hr Timer 1, 2, 4, 8 Hr, Scheduler Timer 1, 4, 8 Hr Timer 1, 2, 4, 8 Hr, Scheduler Timer 1, 2, 4, 8 Hr, Scheduler N/A
Available Colors
White/Graphite White/Graphite White White Beige Beige Mocha Beige

Product Description

The most advanced air purifier developed by Coway. Airmega is a connected air purifier that intelligently, effectively and quietly cleans the air in your home. Its dual-filtration system removes 99. 97 percent of particulate matter from the air, while the accompanying Airmega mobile app (iOS Android) allows you to monitor and manage air quality from almost anywhere.

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Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Coway Airmega 400S App-Enabled Smart Technology Compatible with Amazon Alexa True HEPA Air Purifier, Covers 1,560 sq.ft, White


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Customer reviews

4.6 out of 5 stars
4.6 out of 5
5,990 global ratings

Customers say

Customers like the noise level, performance, and quality of the air purifier. For example, they mention that it's super quiet, effective at clearing the smell of smoke and particulates from the air inside, and that it runs flawlessly. That said, opinions are mixed on value.

AI-generated from the text of customer reviews

633 customers mention457 positive176 negative

Customers like the performance of the air purifier. They mention that it works like a champ, runs flawlessly, and has no issues. The charcoal filters work great, and the process started out pretty smooth. The air purifying unit has an auto sensor that automatically kicks up the fan speed when there is more air.

"...I bought it is because it has an auto sensor that automatically kicks up the fan speed when there are more air particulates in the air...." Read more

"...But the design of our home, I think, allows one unit to work. Our central air unit has only one air return, and it is at the blower unit...." Read more

"...The air cleaner can connect to Wi-Fi and comes with a mobile app, which pushes air quality notifications to your phone in real time.-..." Read more

"...But, definitely there are more failure points and these buttons seem each to be inherently less likely to last forever than the type of button used..." Read more

425 customers mention392 positive33 negative

Customers are satisfied with the quality of the air purifier. They mention that the fundamentals of this air purifying system are phenomenal, it is a high quality product with great attention to detail, and has a great HEPA filter. Overall, customers are happy with the product's performance and durability.

"...Everything appeared new, and worked perfectly. If you want to save s big percentage, I highly suggest checking out the warehouse deals...." Read more

"...The durability should be highlighted - it has been four years, and it’s still working flawlessly...." Read more

"...When our fireplace is on, it actually distributes the heat throughout this area quite well, which is just incredible comfort...." Read more

"...Immediately I notice the build quality of this unit is really nice. Tight fitting parts, nice design details (magnetic doors, for example)...." Read more

422 customers mention328 positive94 negative

Customers like the noise level of the air purifier. They mention that it's super quiet while idling on low fan, and creates a smooth white noise to filter out some of the neighbor's noise. They also appreciate the sound feedback when they push the buttons going up and down with the air filter. Overall, most are happy with the noise it makes.

"...Then I plugged it in and started working immediately. I loved the sound feedback when you push the buttons going up and down with the airspeed and..." Read more

"...The machine, on low, is basically silent at night. I have an opinion that the “auto” mode feature is useless for air purification...." Read more

"...Sound level wise, it is practically silent on low. Even sitting right next to it, you can’t really hear it...." Read more

"...Has night mode that turns off LEDs.- Near silent at slowest speed.- Moves a ton of air.- Has an automatic mode.-..." Read more

347 customers mention323 positive24 negative

Customers find the air purifier easy to clean. They mention that it uses no harmful ozone, and the air is noticeably clean and dust free. The pre-filter is cleanable and the HEPA filter is great. The machine is quiet and excellent for removing dust from the air. The main screen filter is washable and easy to disassemble for cleaning.

"...The AIRMEGA 400s is. And it is constantly monitoring, and cleaning the air. It also uses no harmful ozone...." Read more

"...It has completely eliminated any visible dust particles in the air and almost all dust on surfaces like lamps and tables...." Read more

"...The air absolutely feels cleaner...." Read more

"...Easy to disassemble for cleaning.- Has night mode that turns off LEDs.- Near silent at slowest speed.- Moves a ton of air.-..." Read more

192 customers mention180 positive12 negative

Customers like the appearance of the air purifier. They say it has an elegant design, and the filter and exhaust areas are well designed. The white variant looks trendy and minimalist, and is a well thought out unit.

"...It is clean looking, quality materials and the added lights and sounds really make it high end...." Read more

"...The design is aesthetically pleasing - the white variant looks trendy and minimalist, which adds to our interior decor.-..." Read more

"...and it has a somewhat upscale and modern look...." Read more

"...Tight fitting parts, nice design details (magnetic doors, for example). Everything visually looks and feels high quality...." Read more

191 customers mention147 positive44 negative

Customers like the smell of the air purifier. They say it is very effective at clearing the smells of smoke and particulates from the air inside. They also say it's great for removing allergens and odors out of the house. Customers also appreciate that the air cleaner automatically turns on when it senses smells.

"...No weird smell...." Read more

"...is very little carbon in the filter, but we do notice it gets rid of cooking smells...." Read more

"...effect, but there is no denying that this unit is great for removing allergens and odors out of the house...." Read more

"...up took minutes not seconds and didnt resume previous speed, it couldnt smell anything even if i shook out pine pellet cat litter right next to it,..." Read more

167 customers mention141 positive26 negative

Customers find the air purifier easy to use and unobtrusive. They mention that the setup is intuitive, and everything about the unit is intuitive. They also appreciate the simple design and the powerful mobile app. Customers also mention that it has smart and sleep modes, and that all control functions are easily accessible via the buttons on top.

"...I personally like the way it looks and it was so easy to set up, plug in, and immediately went to work — it was a wonderful experience...." Read more

"...is aesthetically pleasing - the white variant looks trendy and minimalist, which adds to our interior decor.-..." Read more

"...Operation is very easy and straight forward. I don’t mind the touch-screen style buttons at all, it’s actually quite nice...." Read more

"...n't work upon arrival, but that isn't a big deal - all control functions are easily accessible via the buttons on top...." Read more

228 customers mention116 positive112 negative

Customers are mixed about the value of the air purifier. Some mention that it is well worth the price, powerful yet quiet, and more cost-efficient than buying a bunch of smaller units. The app adds great value to the product, providing scheduling, history, and readings that cannot be done with a paper log. However, others say that the filter cost is high, the price fluctuates a lot, and the LEDs themselves consume over 1W of power.

"...COST: It was not cheap, but in the end was mid-level pricing compared to the other machines that cleared the same area...." Read more

"...At first I was put off by what seemed like a high filter cost. Then I recognized what I was spending on allergy medication each month, for one child...." Read more

"...I highly recommend this unit. The prices now are currently amazing so there is no reason you shouldn't get this!" Read more

"...Cons:- White plastic shell attracts dirt like a magnet.- Overpriced when not on sale." Read more

Amazing Air Purifier! Software needs guidance (READ ME)
4 Stars
Amazing Air Purifier! Software needs guidance (READ ME)
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 to be replaced, instead they are cleaned manually, some say just clean them with water using a garden hose . I would be very careful using a hose since the fine mesh could tear. Instead I would recommend wiping them down by hand with a paper towel to remove the fine debris then fill up a bath tub and swirl them around a few times, then let them pat them dry with a towel and let them air dry.I first had the Honeywell AirGenius 4's and 5's for a few years but decided to move away from them because of health concerns related to the ozone producing electrostatic filter. I've heard of respiratory problems and other issues arising from the ozone they produce, even the EPA recently released some documentation on electrostatic filters, so I decided to move to a Honeywell HEPA equivalent.Next I moved to the Honeywell True Clean HEPA HPA300 ($250 each), this unit is also very big with 3 HEPA filters (much smaller filters than the Conway but it has 3 of them instead of 2, and a large replaceable charcoal filter in front of the HEPAs. Although a great unit, I wanted more coverage instead of buying more of these. Consumer reports rates this their top 3 filters on the market, if you have a smaller apartment / condo and want to save some money, this one is great and the replacement filters are half the price (but a little less than 60% of the coverage at around 465 square feet - i'll explain soon why the Coway Airmega 400s should only only be rated at 780 square feet).Lastly I moved the Molekule setup ($800 each) , although a very attractive unit the pre-filter is TINY and got clogged all the time. The pre-filters on this thing vs. the Molekule are maybe 6 times the surface area and there is TWO pre-filters in here, so around 12 times the pre-filter surface area. The HEPA filter in the Molekule feels like a toy compared to the giant ones in this unit. The only advantage the Molekule has is that it contains a light killing coating on the filter activated by a UV light within the unit. If Coway added a UV filter post stage they will own this market.In regards to color unit in all the pictures i've seen show it black, this is not true, its a very attractive gray on all side, and black on the top and feet.The power of this unit is amazing, if you turn it up all the way IT IS LOUD, but at the lowest setting I don't really notice the unit, other items in my room make more noise. There is a big leap in power output and sound from level 1 to level 2. Technically there is 5 settings, sleep, level 1, level 2, level 3, and smart which will just move the settings around using the smart sensor within the unit.Does it clean the air? That should be the most important question! The air smelled smelled noticeably cleaner after using this unit for a day and coming home. If I cooked something right away my house didn't smell of the food, those charcoal filters work great!How may do you need? The 1560 square feet is not accurate, that is for 2 full air scrubs per hour. Technically the rating is suppose to be 4 full square footage air scrubs an hour per the CADR (Clean Air Delivery Rate standard). Then you need to think about if you sleep with your bedroom closed at night you won't get filtered air in there, or if you put the filter in your room the rest of the house will not get airflow. So really this should be rated for 765 square feet at 4 full air scrubs per hour, which is still better than anything on the market! Even the big HoneyWell unit is rated for 465 square feet, and the Molekule is rated for ~400 square feet when you normalize it. I'm going to put some recommendations below, but if you can only afford one unit, don't worry, even 2 full air scrubs an hour is AMAZING, better then most things out there. If you keep it running 24 hours a day your house will be VERY clean.My 2 cents in an IDEAL situation (if you have the extra money to spend): In single floor house I would get one for the master bedroom and one for a common area (living room, kitchen, dining room) as far away from the bedroom as possible. This will ensure while you are sleeping you get clean air and so does the rest of the house. If you have a two floor BIG house I would recommend getting 3 units with the 3rd unit being upstairs in a common area or in a kiddo rooms. 3 units should be good for 2300 - 4680 square feet if you take the full 4 full air scrubs into consideration or Conways 2 full air scrubs an hour.The only downside is the app setup, once working it is great on Apple. On Android it is a mess, I think they ported it over from Apple to Android and didn't finalize their QA.I was NOT successful adding this unit to my 5Ghz network. It doesn't let you select your wifi from a list, instead it grabs the last wifi you were connected to. So first thing, connect your iphone to your 2.4Ghz network. Then start the setup.One important thing I documented in my pictures is where the buttons are. They aren't the big round things on the left side needed to start the wifi paring, those are just indicators. You touch the screen printed area that i'm pointing at in the pictures in order to start the wifi pairing (Follow the app instructions).The unit is turned on by the big power button, but the level is controlled by the touch arc between the power button and the screen printed area of power level.You will probably get a API request timeout in the app the first time you set it up, just force kill the app (on your iphone X swipe up to pull up the app carousel, then swipe up again to force kill the app, on iphone 4 to 8 double touch your home bar to bring up the app carousel, then swipe up again to force kill the app). On the second reload everything will work great.Other then those small hangups on setup and getting the app working for the first time, it has been great. I think the app is pretty well laid out and informative.The app will tell you when to change your filters, what your air quality looks like over the last few hours / days / week, give you the ability to turn on and off the unit by a schedule, adjust the fan levels, order new filters, etc.If you don't use the app there is a lit up circle on the front of the unit that will tell you your current air quality and notify you if you need to clean or change your filters (clean pre filters or change once a year your HEPA / Charcoals).Coway if you want to own this market and steal the market share away from dyson, honeywell, and everyone else on the market, revise your app with better QA and a better UX, it is a little rough. Add a post UV filter. Add another step between fan level 1 and fan level 2. Get this in costco, best buy, or consumer reports.I highly recommend this unit. The prices now are currently amazing so there is no reason you shouldn't get this!
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Top reviews from the United States

Reviewed in the United States on November 18, 2018
Style: 300 WHITEPattern Name: Air PurifierVerified Purchase
Customer image
5.0 out of 5 stars Cleans Indoor Air in Hazardous Air Conditions - Beautiful High Quality Design
Reviewed in the United States on November 18, 2018
So like many others in the Bay Area, we have been hit with unprecedented air levels during the Camp Fire disaster, and levels of particles in the air reached 263 on Friday which is “Hazardous” and all local schools were closed a few days ago. I had my 79-year old mother and a cousin with a 2-year old toddler coming to stay for the holidays, as well as two girls ages 9 and 11. We ended up telling the family with the toddler to stay clear of the area. My mom did fly in and we have masks we are wearing if we go outside.

After researching for hours and hours and asking my friends for advice, I went ahead and purchased this air purifier. I have been using it for a few days now. It shipped 1-day from Amazon and I immediately put it to use. After an evening of use, my scratchy throat was better the next day. And the indoor air felt clean and refreshed. As if the window was opened. Here were my main considerations:

• Size of Room
• Effectiveness of Machine
• Size and Look of Machine
• Cost of Machine
• Set up / Ease of Use
• (Noise Level)

SIZE OF ROOM: The first thing you need to identify is the actual size of the room you are trying to clear. My living room, dining room and kitchen are all in one open space so the cooking smells and airflow are an issue. Many of the air purifiers recommended only clear 300’ of space. My room is at least 700’ large. Ceiling height should also be a consideration. And ideally get one that handles a room much larger (within reason) so your purifier does not have to run on high the entire time.

EFFECTIVENESS: I believe a dual filter system is the minimum for pure air cleaning. We already had the Dyson fan with HEPA filter. This is one level. Adding in an activated carbon filter for smells is another. One machine that was pricey (Molekule $799) has a third level of UV light to kill bacteria which is critical if you have mold. Maybe even if you have dogs. The UV light was overkill for my current needs and also more expensive so I opted for “no” this time around. Molecule also has 3, 6 or 9 month financing which was intriguing but they were out of same day delivery so I opted to go through Amazon. There are different filter consideration is based on air cleaning (HEPA), smell cleaning (CARBON), and bacteria/mold cleaning (UV / Ozone’s). There is an added consideration for pet dander.

SIZE and LOOK: I almost bought the taller thinner machine that had customized fronts you could add — but it was too expensive to ship next day. So I did more research and decided on this model. It is LARGE. Like a small side table that unfortunately does not double as a side table because you need to keep the top clear. I personally like the way it looks and it was so easy to set up, plug in, and immediately went to work — it was a wonderful experience. It is clean looking, quality materials and the added lights and sounds really make it high end.

COST: It was not cheap, but in the end was mid-level pricing compared to the other machines that cleared the same area. Over 1200 feet so I am covered.

SET UP / EASE OF USE: I took this unit out of the box, took off the plastic wrap, and took the filters out of plastic bags one set on each side of the machine. Then I plugged it in and started working immediately. I loved the sound feedback when you push the buttons going up and down with the airspeed and also easy to set on auto. I also appreciate the fact that air is filtering from both sides of the unit. For this reason, when in use, It does need at least one and a half to 2 feet of open space on each side of the unit, so it does need to be pulled out when in heavy use.

NOISE LEVEL: I did not really care about the noise level but it is quiet and on AUTO now and it feels cool and peaceful in the room.

BONUS: The last reason I bought it is because it has an auto sensor that automatically kicks up the fan speed when there are more air particulates in the air. This is traditionally during cooking but in my case it was handy when doors would open and closed during this fire season. When I first plugged it in it was purple and took about 10 or 15 minutes to turn blue. This is after one week of no open doors or windows or airflow inside during the fires. I let my neighbor borrow it and it took about half an hour to clear his space which was read and then bright pink and purple and finally turned blue. I wondered if it just turned a different color when it was plugged in because when I brought it back into my unit it turned purple for about 15 minutes before turning blue again. Then, I made some popcorn in during the cooking of the popcorn the unit turned purple again and clean out the air for about half an hour. I found out after meeting the materials you can change the sensitivity level of the particular sensor, but now I believe it is accurate and helpful. I love having the color feedback to confirm the air is clear.

I also bought a Levoit smaller fan for the bedroom at the same time and I have to say it does barely anything. And it feels cheap compared to the Conway. I am going to send it back. I am definitely keeping this Conway Airmega and highly recommend it to other people with the same considerations. I will continue to test the sensitivity level of the sensors and will post more updates if anything new arises.
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Reviewed in the United States on February 10, 2019
Style: 400S WHITEPattern Name: Air PurifierVerified Purchase
Customer image
5.0 out of 5 stars Cleaner healthier air, while saving money, don’t be affraid to try the Amazon warehouse deal!!
Reviewed in the United States on February 10, 2019
I love a lot about this air filter. I really like the smart features. I originally thought they would be gimmicky, but after living with it for a few weeks I have experienced the value. I love that it detects the airborne contaminants, and increases air circulation to clean the air. I’ve noticed that it increases air flow during high traffic and vacuuming, among other things. I like that I can check the app for air quality, and I can see past air quality as well. I like that the filter knows when it’s bedtime and decreases airflow, in order to keep noise pollution down, for quiet tearfulness.
Now on to effectiveness. We have a nearly 3000 square foot new construction home. It’s about three years old. Most of our air contaminants likely come from area construction, as well as a year round growing season, with year round pollen and similar contaminants. My oldest child has had a persistent hack for the last couple of years. I would not really call it a cough, so much as a hack. Every few minutes he would do a throat and lunch clearing cough. It never seemed short of breath, just seemed to be clearing an irritant. We took him to doctors, who suggested everything from allergies to asthma. We sort of ruled out asthma because he is athletic, and has no issues out working other children, and displays no unacceptable shortness of breath, other than what you expect, and recovery times are quicker than normal. As a previous asthma sufferers myself, that does not resemble asthma to me. We opted to try daily allergy medications, and they seemed to help some, but did not eliminate that dreaded hack. Now I said all of that to say this. Since we added this filter, we hardly ever hear him clear his lungs. I’m actually surprised, because I assumed it would take much longer. I figured he had been doing it long enough that it was a habit by now. But after a few days of filtering, his symptoms diminished, and after a week or so, he almost never does it.
Now our home is nearly double the size of the the filters rated coverage area. But the design of our home, I think, allows one unit to work. Our central air unit has only one air return, and it is at the blower unit. This is located centrally, upstairs, in a closet with a vented door. The area around that closet is sort of an open landing area, that opens to a large family room. I think what is happening is that the filter can clean large volumes of air, that then get circulated through the house. The dirty air is then pushed back up to that open area, and filtered by the unit. The unit can tell when air is clean or dirty, and increases, or decreases circulation, accordingly. Anecdotally this seems to be a successful test, eliminating our primary concern. The side benefit is the remainder of our family is now breathing cleaner, healthier air. It just took one sensitive member to illustrate the need. I wish I had known this would solve the problem, and I wish I had done it sooner. I expected to need to units to have a successful result, and I’m so pleased that one unit does the job. Not every home may have the same results. Some may actually need two units to do the job.
Also, I opted to shop the amazon warehouse deals and save a bunch of money. I bought a used acceptable condition unit. It arrived in a generic box, but everything was still protected by the factory foam, and cling wrap. Everything appeared new, and worked perfectly. If you want to save s big percentage, I highly suggest checking out the warehouse deals. If your displeased with the condition, Amazon has a very generous return exchange policy. My filters in my unit looked brand new and unused. But if I were concerned, new filters are about $100, so you could still have significant savings, even if you opted to put brand new filters in it right away. At first I was put off by what seemed like a high filter cost. Then I recognized what I was spending on allergy medication each month, for one child. The filters provide clean, allergy free air for the whole family, at a fraction of the cost of allergy medications for one child. By reducing our allergy medication costs, we can replace filters as needed, an no added cost.
I would have thought building a new home would prevent these issues, but the other new construction in the area, seems to exacerbate the issue.
I also weighed the option of an Aprilair, or air bear system on our central air unit, but I was concerned about the designed air flow for our system, and any disruption could shorten the central air life, increase energy needs, and decrease overall home comfort. Those air filters work great for a system designed and tuned for their use. But for a system designed for a more or less open fiber filter, it could cause problems. So I decided a stand alone filter would be the better option. Also those air handler systems that go on your ariconditioner unit, are not usually helps rated. The AIRMEGA 400s is. And it is constantly monitoring, and cleaning the air. It also uses no harmful ozone. I’m an ozone fan, and I own an ozone generator. But I like to use it in specific situations, under controlled conditions, when all occupants can be out of the house. I don’t want ozone to be a part of my primary home air filtration system. Others may have different priorities, and I encourage you to research the benifits and precautions, and choose according to your needs and priorities.
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Larry
5.0 out of 5 stars Excellent air filter
Reviewed in Canada on February 16, 2024
Style: 400 GRAPHITEPattern Name: Air PurifierVerified Purchase
B. Lefebvre
5.0 out of 5 stars Quiet air purifier
Reviewed in Canada on December 9, 2023
Style: 300 WHITEPattern Name: Air PurifierVerified Purchase
Juan
5.0 out of 5 stars Elimina olores y funciona solo.
Reviewed in Mexico on April 25, 2023
Style: 400 GRAPHITEPattern Name: Air PurifierVerified Purchase
Don Gauthier
5.0 out of 5 stars Quality meets Quiet
Reviewed in Canada on January 6, 2022
Style: 400S GRAPHITEPattern Name: Polka DotVerified Purchase
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Don Gauthier
5.0 out of 5 stars Quality meets Quiet
Reviewed in Canada on January 6, 2022
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 (standard) then go for it… but consider how much more you are willing to spend for the ability to control fan speed and receive notifications on your phone.

Filters are not easy to find, perhaps due to the popularity of HEPA in the age of COVID, …but like face masks, hand sanitizer, and toilet paper… I’d expect that to normalize soon. All said, we’re happy. Would not hesitate to purchase again.
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HR
5.0 out of 5 stars Muy buen purificador de aire
Reviewed in Mexico on March 4, 2021
Style: 400S WHITEPattern Name: Air PurifierVerified Purchase
One person found this helpful
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