Meilleur du Meilleur

Coway Airmega 400

Coway Airmega 400, packshot

Idéal pour : Idéal pour les grands espaces exposés aux allergènes, aux poils d’animaux, à la poussière ou aux odeurs.

En bref : Le consensus Reddit décrit le Coway Airmega 400 comme un purificateur performant et durable, particulièrement adapté aux grands espaces, aux allergènes et aux odeurs. Son prix et ses filtres d’origine sont jugés élevés, ce qui incite à attendre une promotion et à envisager des filtres compatibles.

Note de consensus

8.0/10

#2 sur 16 · Purificateurs d'air

selon Reddit

Score de sentiment82 % positifs
Positifs31
Neutres2
Négatifs5

Au-delà de ce modèle, la marque Coway (toutes gammes) recueille 67 % d'avis positifs sur 376 utilisateurs Reddit. Ce signal marque ne compte pas dans la note du modèle ci-dessus.

Voir sur Amazon

Points forts

Filtration efficace

21 1

« The 1512, 300, and 400 are all also great » Voir l’avis

« People with cat allergies come over and are able to stay for a long time without issue, the purifiers have really done wonders for our general air quality. » Voir l’avis

« Most importantly though, the units clearly work well based off thousands of happy users and they do seem very well built. » Voir l’avis

Bonne couverture

10 2

« So the Coway Airmega would be better for allergens + general coverage. » Voir l’avis

« It's oversized for a 144 sq. ft. room, but this allows you to use lower & quieter airflow speeds with good air cleaning. » Voir l’avis

« I’d recommend the 250 for a large bedroom, the 150 for a small bedroom, and the 300 or 400. » Voir l’avis

Fiabilité éprouvée

6 2

« it's built like a tank and after a year, it still showed the filters at maybe 75% remaining. » Voir l’avis

« I've had it for 6 years now and it's still great. » Voir l’avis

« Quality isn't as good as the Coway Airmega 400 in all likelihood; Levoit has a 2 year warranty. » Voir l’avis

Points faibles

Prix élevé

5 8

« Thanks for your links. I was about to purchase the 400, but as you stated the 50’s seem to have a better CADR rating. » Voir l’avis

« Annoyingly, there were no good Black Friday or Christmas sales for the Airmega 400 or Airmega ProX in 2025. » Voir l’avis

« You can get the same CFM power from a DIY corsi rosnethal box. » Voir l’avis

CritèreNote /10Ce qu'en dit le consensus
Couverture7.7Le consensus Reddit le destine aux grandes pièces, mais recommande parfois deux unités pour les surfaces très vastes.
Bruit5.4Le bruit est jugé maîtrisé pour cette puissance, surtout lorsque l’appareil fonctionne à vitesse réduite.
Coût des filtres3.9Les filtres d’origine sont chers, tandis que plusieurs utilisateurs rapportent de bons résultats avec des compatibles moins coûteux.
Fiabilité7.5De nombreux utilisateurs rapportent plusieurs années de fonctionnement presque continu, malgré quelques témoignages d’émanations initiales irritantes.
Filtration8.6Les utilisateurs Reddit saluent surtout son efficacité contre les allergènes, les particules, les squames et les odeurs.
Prix2.6Le tarif catalogue est largement critiqué, mais les promotions rendent l’achat nettement plus intéressant.
Application0.0La version Airmega 400 standard ne propose pas de contrôle par application.
Consommation9.7Son efficacité énergétique est présentée comme meilleure que celle de certains concurrents puissants.
Mis à jour le 2026-08-09 Comment on calcule

Avis Reddit

41 avis analysés · Positifs 31 Neutres 2 Négatifs 5

  • Tish86 🇬🇧

    1 commentaire analysé

  • Psychological_Lab203 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Recommendation: Best Air Purifiers on the market

    I’ll break down the knowledge I have to maybe help you make a decision. Most air purifiers are good for either smells, OR dander. You’ll need a ton of activated charcoal to deal with VOC’s. UV lights won’t do much when there’s a HEPA filter already, that’s catching what the UV light would ‘clean’. Smell fresh and clean you need activated charcoal. If you want minimal maintenance you’ll need a TON of it If budget is truly not an issue what so ever, It all depends on the house layout. I would get separate air purifier and air scrubber for the carbon. My recommendation for VOC’s: Amaircare Airwash MultiPro Air Scrubber Heavy VOC Focus 25 lbs Carbon. It has 25 pounds of carbon that will last a long time My recommendation for an air purifier for dander would be the Coway pro X, or any of their air mega Series if you want multiple smaller ones instead. I would not get the round ones, as if you want the hepa filters to actually last a year, you have 0 choice besides vacuuming/washing a pre filter and the round ones don’t have a separate pre filter. The 1512, 300, and 400 are all also great

    Animaux
  • triumphofthecommons 🇬🇧

    1 commentaire analysé

    r/AirQuality · What is the best air purifier out there?

    Coway purifiers are top notch. i have an AirMega 400 model in the room where we keep our cat litter boxes. it's built like a tank and after a year, it still showed the filters at maybe 75% remaining. i replaced them anyway, as i know the carbon pellets were spent without a doubt, and wanted to combat litter box smells... but the filters were still in fine shape. Coway filters are like $80, but i found a review / test of third-party filters that didn't have any appreciable difference for $30. they make a bunch of different sized purifiers for different room sizes, so see what suits your sit.

    AnimauxCoût des filtresOdeurs & COV
  • Fuzzy-Nuggets 🇬🇧

    1 commentaire analysé

    r/BuyItForLife · Best air purifier for dog owners? Need real-world opinions

    I have a Coway Airmega 400 in the main living room and a Coway Airmega Mighty in the front and back of the house. We love them! Three cats. People with cat allergies come over and are able to stay for a long time without issue, the purifiers have really done wonders for our general air quality. Highly recommend Coway!

    AllergiesAnimaux
  • Big_Nefariousness785 🇬🇧

    1 commentaire analysé

    r/HouseFresh · Coway purifiers no longer "True HEPA" or "Green True HEPA"; HEPA designation appears to be applicable to speed 1 only in most models?

    I noticed this when we were investigating what to buy and purchased our airmega 400, and am very curious over any information you may find. It's similar to the wording of the disclaimers on our levoit purifiers. I think even IQ air notes this only for certain lower speeds so it may be more common than we realize? That being said, lack of transparency from the company/the awful offgassing we experienced from the unit itself and 2 sets of filters (headache and eye irritation the first couple days before I ran it outside for a while and after trying with two sets I know it was the filters) left a little bit of a sour taste in my mouth. Most importantly though, the units clearly work well based off thousands of happy users and they do seem very well built.

    Odeurs & COV
  • Legal_Net4337 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Coway Airmega 350 and 450 thoughts?

    Thanks for your links. I was about to purchase the 400, but as you stated the 50’s seem to have a better CADR rating. Combined with the coupon code, it’s less expensive. Pulled the trigger this morning.

    Qualité-prix
  • captainstormy 🇬🇧

    3 commentaires analysés

    r/BuyItForLife · What are the Best Air Purifiers on the market that you've ever tested and really trust?

    I've got a Coway unit. [Their 400 model](https://www.amazon.com/dp/B0722YZ1R1?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_7&th=1). I've had it for 6 years now and it's still great. Actually I've got a 4 of them. 1 on each floor of my house that runs 24/7 and another in my home basement/cigar lounge that runs when I'm down there having a cigar. I buy an aftermarket filter. Usually [this one](https://www.amazon.com/dp/B083FLKPYS?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_12&th=1). I find it works just as well as the OEM and is much cheaper. $35 instead of $110.

    Conso énergieCoût des filtresFumée
    r/BuyItForLife · What are the Best Air Purifiers on the market that you've ever tested and really trust?

    At this point it's been years since I've used an OEM filter so I can't say how their quality is these days. When I bought them last the OEM filters were perfectly fine but were stupid expensive. I switched to after market filters year ago and I've never had an issue. They work just as well as the OEM did for me but they are like a third of the price. Which when you have 4 units (3 of which run 24/7) filter costs can get expensive. Most people probably won't run them 24/7 but I do. I've got pollen allergies and some of my friends have dog allergies (we have a dog) so it helps keep those problems down.

    AllergiesAnimauxConso énergieCoût des filtres
  • sissasassafrastic 🇬🇧

    6 commentaires analysés

    r/AirPurifiers · Deciding between Winix C909 and Coway Airmega 400 (Bay Area, CA, USA)

    Hi, I created the newest iteration of the Buying Guide. I didn't include the [Coway Airmega 300](https://cowaymega.com/products/airmega-300) because in the past, the [Coway Airmega 400](https://cowaymega.com/products/airmega-400) would be discounted frequently enough to justify its purchase instead. Annoyingly, there were no good Black Friday or Christmas sales for the [Airmega 400](https://cowaymega.com/products/airmega-400) or [Airmega ProX](https://cowaymega.com/products/airmega-prox) in 2025. Coway seems to have quite a few models out of stock and I'm unsure why. I'm hoping there will be discounts soon... In terms of moving the unit around, the ProX has wheels. It's also highly energy efficient per CADR. And it has some of the highest CADRs around. Only the [Medify Air MA-112](https://medifyair.com/products/ma-112?variant=31240021180483) and [Medify Air MA-112 PRO](https://medifyair.com/products/ma-112-pro-air-purifier-white?variant=42313765486659) beat it, but these are much louder and less energy efficient. [Sylvane has a somewhat better price right now](https://www.sylvane.com/products/coway-airmega-pro-x-large-space-air-purifier). I have a [Winix C909](https://www.winixamerica.com/product/c909/) from Costco in a \~175 sq. ft. room; very oversized for the space. The top airflow setting called "Turbo" is 60 dBA according to the Decibel X Android app, so it's quite loud (note that I didn't use a professional sound meter). I like it very much. As for app control, I've never used it. Since the C909 will be very underpowered for the overall square footage, I would always run it on the highest airflow speed / setting whose noise levels you can tolerate. We'll see about the lawsuit re: Winix. It could be that the HEPA filters aren't meeting the requisite efficiency and/or too much dirty air bypasses the HEPA filter. There are no gaskets or seals on Winix's HEPA filters. Coway's Airmega 400(S) and Airmega ProX will be better build quality and likely last longer with fewer issues than Winix. Some Winix units develop bad motor bearings after the 2 year mark. **I would hold out for as long as possible and keep a close eye on Airmega 400 and Airmega ProX prices until spring approaches.** I almost never recommend either model at full price from Coway.

    Conso énergieQualité-prix
    r/AirPurifiers · Is Coway Mighty AP-1512HH / Airmega 200 worth it?

    Is either model used? It's okay but not good. But no Coway model is going to be useful for odors longer-term. None of their models have significant weights of activated carbon or other sorbent media. Coway purifiers are primarily designed to capture particulates. That being said, it is a very good brand. And I agree on the Airmega 400 (if you're trying to reduce PM10, PM2.5, and PM1.0). I wouldn't pay more than $400 for it; sometimes it's on sale for $349. We strongly recommend source control and ventilation first for gases/vapors/odors/VOCs. Heavyweight sorbent purifiers are very loud, very expensive, and clean the air more slowly than particulates-focused units. The staleness could have other causes (ignoring the dog, kids, or husband as potential contributors for now). One is high relative humidity (RH). RH should be between 30 - 60%\*. Consistently high RH can cause mold and mildew to flourish. \*RH should be below 50% and possibly 45% *if* you have dust mite allergies. The "budget" solution for certain odors would be something like the [Oransi TrueCarbon 150C](https://oransi.com/products/truecarbon-150c-air-purifier). It uses 3.2 lbs. of potassium permanganate (KMnO₄) impregnated activated carbon. The price keeps increasing; I definitely wouldn't pay $349 for it. Wayback Machine says it was $269.99 in Nov. 2025.

    Odeurs & COVPoussière fineQualité-prix
    r/AirPurifiers · Best Value Air Purifier on Amazon Prime Sale right now?

    It's highly difficult to find a purifier that handles particulates (like <10 microns "dust" particles, mold, pollen, smoke particles) *and* gases/vapors/odors/VOCs. You need many pounds of activated carbon or other sorbent media for gases/vapors/odors/VOCs. Most common and cheaper brands have very little sorbent media by weight. Additionally, purifiers aren't good at reducing *visible* dust particles as they're large and heavy compared to "invisible" pollutants like PM2.5. [Visible dust is best tackled by source control, maintenance, and ventilation](https://www.reddit.com/r/AirPurifiers/wiki/index/faqs/#wiki_what_else_can_i_do_to_reduce_dust.3F). Generally Coway is one of the best quality consumer-grade brands for particulates. No mention of a budget, so I don't know how much you'd like to spend. The [Coway Airmega 400 in White](https://www.amazon.com/Coway-Airmega-Purifier-sq-ft-White/dp/B01C9RIACG/?th=1) is deeply discounted right now. (Full price is $649.) It's oversized for a 144 sq. ft. room, but this allows you to use lower & quieter airflow speeds with good air cleaning. The [400's replacement filter set](https://cowaymega.com/products/airmega-400-max2-filter-set) are more expensive because of dual air intakes and because it's Coway. A cheaper option would be the [Levoit Vital 200S-P](https://www.amazon.com/LEVOIT-Purifiers-Washable-Filters-Quality/dp/B0BGPF71Q6/?th=1) which is still oversized in terms of Clean Air Delivery Rates (CADRs). Quality isn't as good as the Coway Airmega 400 in all likelihood; Levoit has a 2 year warranty. The replacement filter is more affordable. There's also the [Winix C909 sold at Costco](https://www.costco.com/p/-/winix-c909-4-stage-air-purifier-with-wi-fi-plasmawave-technology/100842491) which is excellent value for a HEPA purifier and its CADRs.\* \*Has PlasmaWave, an optional bipolar ionizer. Keep this *off* if you have pet birds as it could harm or kill them. (NB: PlasmaWave defaults to being enabled after a power off/power on cycle.)

    Coût des filtresGrande piècePoussière fineQualité-prixSilencieux
    r/AirPurifiers · Air Purifier for Nursery ?

    It's difficult to buy just one unit that's great at removing particulates (e.g., pollen, dander, soot, smoke particles, small dust particles, etc.) *and* gases/vapors/odors/VOCs. Most particulates purifiers have very little activated carbon or sorbent media by weight. Oppositely, heavyweight sorbent media purifiers clean the air more slowly than particulates-focused units for several reasons. The thick beds leave less room for mechanical filters (the latter meant for particulates). There's also the need for ["dwell time"/"residence time"](https://www.airscience.com/carbon-filters) for optimized gaseous removal. Unfortunately heavyweight sorbent media purifiers are very loud and very expensive. Infants and young children shouldn't be exposed to overly loud units; a *Pediatrics* [article states the recommended sound limit for US hospital nurseries is 50 dBA](https://doi.org/10.1542/peds.2013-3617). To boot, sometimes you need specially modified sorbents depending on the VOC "species" in your air. Plain/chemically untreated sorbents do not have high removal efficiencies for all gaseous species. **For a list of VOCs and their concentrations, air testing with Gas Chromatography-Mass Spectrometry (GC-MS) analysis is required.** An example of a business performing air testing and analysis is [Fike Analytical Technologies, LLC](https://fikeanalytical.com/). Don't know if they work nationwide. This is why we recommend source control and ventilation strategies first for gases or VOCs. Building-wide solutions could be an Energy Recovery Ventilator (ERV) or a Heat Recovery Ventilator (HRV). # Particulates purifiers I think the concern about Coway's Green HEPA media is overblown, but it's your decision of course. If you change your mind, I might go with the Coway Airmega 400. *Don't* buy the 400 at full price; look for prices of $349 - $450. You may want to consider the [Smart Air Blast Mini MKII](https://www.smarterhepa.com/collections/air-purifiers/products/smart-air-blast-mini) or the [Smart Air Blast MKII](https://www.smarterhepa.com/products/smart-air-blast) instead if you want to avoid antimicrobial coatings. The drawbacks: the Blast Mini and full size Blast are not as energy efficient as the Coway Airmega 400. Both Blast models have an optional activated carbon filter, but the weight of carbon is very low for treating VOCs.

    AllergiesAnimauxConso énergieFuméePoussière fineQualité-prix
    r/AirPurifiers · Best Value Air Purifier? (Coway, Winix, Blueair, Shark, Sans, etc)

    Because your ceilings are higher than 8 ft., we need to calculate by volume first and then divide by 8 for the "adjusted" purifier coverage rating. The bedroom has an adjusted purifier coverage rating of 437.5 sq. ft. Minimum CADRs would be 292 CFM. Not sure how big your living room is, as you didn't list its dimensions. Let's just say it's 450 sq. ft. with a 10 ft. ceiling. Adjusted purifier coverage rating is 562.5 sq. ft. Minimum CADRs needed are 375 CFM. I normally recommend Coway. The bigger units ([Coway Airmega 400](https://cowaymega.com/products/airmega-400) and [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox)) are currently not on sale directly from Coway. And I definitely *don't* recommend buying either model at full price. Both the [Airmega 400](https://www.sylvane.com/products/coway-airmega-400-air-purifier) and [Airmega ProX](https://www.sylvane.com/products/coway-airmega-pro-x-large-space-air-purifier) are cheaper at Sylvane for the moment. **Alternatives** * Bedroom: [Levoit EverestAir-P](https://us.vesync.com/product-detail/levoit-everestair-p-smart-air-purifier-525) (from the VeSync Store) * Living Room: [Levoit EverestAir-P](https://us.vesync.com/product-detail/levoit-everestair-p-smart-air-purifier-525) \+ [Levoit Vital 200S-P](https://us.vesync.com/product-detail/levoit-vital-200s-p-smart-air-purifier-560) The EverestAir-P has a top Smoke CADR of 354 CFM. So if your living room is roughly the equivalent of 562.5 sq. ft. or larger, you would need the Vital 200S-P to meet minimum CADRs.

    Qualité-prix
    r/AirPurifiers · Recommendations welcome

    I'm going to address Jaspr in a second comment as this one will be long enough. Are you allergic to something in the dust such as dust mite droppings? As you have a non-cuboidal room and a high ceiling, you'll need to do more complex volume calculations. This will help you compare to air purifier coverage. **Hunker** has a guide here: [https://www.hunker.com/13402620/how-to-measure-a-vaulted-ceiling/](https://www.hunker.com/13402620/how-to-measure-a-vaulted-ceiling/) Typically, air purifiers specify their coverage in square feet. This assumes a 8 ft. or 2.4 meter high ceiling. So if an air purifier has for instance 4.8 Air Changes per Hour (ACH) at 500 sq. ft., you'd multiply by 8 ft. to get 4,000 cubic feet of volume. It doesn't make sense that a purifier is rated HEPA only on Sleep Mode. Either the filtration media conforms to a known HEPA standard or it does not. One of the most common standards is the **EN1822-1:2019 "High efficiency air filters (EPA, HEPA and ULPA) - Part 1: Classification, performance testing, marking"** created by the European Committee for Standardization. Another is the U.S. Department of Energy's **DOE-STD-3020-2015** standard. For reference... CADRs: Clean Air Delivery Rates; CFM = Cubic Feet per Minute; particulates = pollutants like dust, pollen, smoke particles, etc. # CADR Rules and Air Changes per Hour (ACH) The golden rule for sizing an air purifier is that particulate CADRs should be *at minimum* 2/3 of your room's area. This assumes an 8 ft. high ceiling. CADR for each particulate type is the most important metric of your air purifier. However if you're allergic or highly sensitive to something, this rule may not suffice. Likewise regarding wildfire smoke: wildfire smoke requires a smoke CADR equal to a room's area (8 ft. ceiling). This is according to the **Association of Home Appliance Manufacturers (AHAM)**. If you've ever looked at the [AHAM Verifide Directory](https://www.ahamdir.com/room-air-cleaners/), you'll notice the Suggested Room Size for purifiers is based on 4.8 ACH. Again, with allergies or sensitivities you will need something more than 4.8 ACH. You also have ACH from any installed HVAC systems, but you may not know this information and a home environment is highly variable. # Corsi-Rosenthal Boxes You will need multiple air purifiers for your space given its volume. Air purifiers are not great at capturing high levels of **pet hair** nor **visible dust**. Relative to much smaller particulates, pet hair and visible dust are heavy and large. Unless either of these is very close to the air purifier, both will fall and settle on various surfaces. Vacuuming and dusting are your primary methods of controlling visible dust and pet hair. A very good bagged vacuum with HEPA filtration can make life with allergies more bearable; the most common brand suggestions in the USA and Canada are Sebo and Miele. DIY purifiers called Corsi-Rosenthal boxes have greater air flow and certain particulate CADRs than many commercially available air purifiers. They're also far cheaper than premium or high end purifiers. The standard C-R box uses MERV 13 furnace filters which are less restrictive than HEPA filters. With a strong fan, it's possible to attract and capture more pet hair and visible dust. But again, C-R boxes cannot replace vacuuming. You may not like the homemade box-fan-and-duct-tape look and some configurations are loud. A few people have made some rather deluxe versions as shown in our subreddit and elsewhere in r/crboxes # "Whole House" Particulates Filtration Another measure you can pursue alongside freestanding purifiers is a "whole house" cabinet air cleaner attached to your HVAC. Cabinet air cleaners are available from many HVAC equipment manufacturers (Carrier, Lennox, Trane, American Standard, etc.) and a third party company called AprilAire. Cabinet air cleaner filters are 4" to 5" thick. They offer greater surface area and lower pressure drops than many standard 1" thick filters used in air handlers and furnaces. AprilAire offers MERV 11 to MERV 16 filters. A few things to keep in mind: when adding a new cabinet air cleaner or a more restrictive filter, it's very important to ensure your HVAC equipment is not overworked. Many systems cannot handle the pressure drop of a 4" - 5" thick MERV 16 filter. An overly restrictive filter can mean less air ventilation and circulation in your home. You may wish to consult an HVAC technician to do the proper load calculations and recommend an exact MERV. Whole house cabinet air cleaners are meant to filter particulates from recirculating throughout your home and to protect the coils. They are not sufficient for quickly tackling pollutants generated within a particular room or space. # Buying Freestanding Air Purifiers I don't know your budget. And it may need to be quite high for this space if you're not going the C-R Box route. Keep in mind the purifier units' cost, energy costs as converted to kilowatt-hours, and replacement filter costs. Another issue with certain purifiers is sound or noise levels. Many purifiers are really loud at top speed and the decibels rating in the product literature isn't accurate. Most particulate CADRs given by brands are on the top speed as well. If you want to calculate combined decibels levels, see this **Decibels Calculator** here: [https://www.noisemeters.com/apps/db-calculator/](https://www.noisemeters.com/apps/db-calculator/) # Large Purifier Models **Coway Airmega ProX** * Room Size: 4.8 ACH at 886 sq. ft. * Particulates Filtration: "Max2" HEPA H13 Filters (Quantity: 2) * Sound Levels: 23 - 46 db(A) * Dust CADR: 580 CFM * Pollen CADR: 450 CFM * Smoke CADR: 568 CFM * Features: Locking wheels * Drawbacks: Expensive. * Price: Currently $765.99 in Mocha Beige at [Coway](https://cowaymega.com/products/airmega-prox?variant=45657065750782) **Smart Air Blast MKII Air Purifier** * Air Changes per Hour (ACH): 4.8 ACH at 1,875 sq. ft. * Particulates Filtration: H13 HEPA Filter (150 sq. ft. of filter surface area) * Dust CADR: 559 CFM * Other CADRs not given * Sound Levels: 29 – 37 – 43 dB * Features: Locking casters and metal housing * Drawbacks: Others CADRs missing; no Intertek testing report available on website AFAIK. Very expensive. * Price: $929 at [Smarter HEPA](https://www.smarterhepa.com/products/smart-air-blast) **Medify Air MA-112 PRO** * Particulates Filters: Integrated Pre-Filters + True HEPA H13 Filters (Quantity: 2) * Top Sound Level: 62.0 dB * Air Changes per Hour: 4.8 ACH at 930 sq. ft. * Tobacco Smoke CADR: >600 CFM * Dust CADR: >600 CFM * Pollen CADR: >450 CFM * Weight: 33.5 lbs. * Features: Has wheels, Filter Indicator, and Timer. * Drawbacks: Very loud. Integrated pre-filter is overlayed on the HEPA media. Great care is needed to very gently clean dust off of the pre-filter. * Price: $694.99 at [Medify Air](https://medifyair.com/products/ma-112-pro-air-purifier) # Smaller Models (Buy Multiples of Each) **Coway Airmega 230** * Air Changes per Hour: 4.8 ACH at 403 sq. ft. * Particulates Filtration: HEPA H13 * Dust CADR: 294 CFM * Pollen CADR: 302 CFM * Smoke CADR: 273 CFM * Sound Levels: 21 - 51 dB(A) * Price: Currently $259.99 at [Coway](https://cowaymega.com/products/airmega-230) **Coway Airmega 240** * Air Changes per Hour: 4.8 ACH at 403 sq. ft. * Particulates Filtration: HEPA H13 * Dust CADR: 292 CFM * Pollen CADR: 343 CFM * Smoke CADR: 282 CFM * Sound Levels: 21 - 51 dB(A) * Price: Currently $249.99 in [Warm Gray at Coway](https://cowaymega.com/products/airmega-240?variant=42429066248446) **Coway Airmega 400** * Air Changes per Hour: 4.8 ACH at 650 sq. ft. * Particulates Filtration: "Max2" HEPA H13 Filters (Quantity: 2) * Dust CADR: 358 CFM * Pollen CADR: 450 CFM * Smoke CADR: 285 CFM * Sound Levels: 22 - 52 dB(A) * Price: Currently $349 in [White at Coway](https://cowaymega.com/products/airmega-400?variant=33436457009287)

    AllergiesFuméeGrande pièceSilencieux
  • UncleGurm 🇬🇧

    4 commentaires analysés

    r/AirPurifiers · Help me decide: Coway Airmega 250 or Airmega 350

    I use a Coway 250 in my master suite - 13x16 plus en-suite bathroom - and it is fine on medium 24/7. The 300/400 are for larger spaces. I’d recommend the 250 for a large bedroom, the 150 for a small bedroom, and the 300 or 400. I don’t recommend the 350 - the round design is inherently inferior to the others on this list.

    Grande pièce
    r/AirPurifiers · Thoughts on these Air Purifiers

    So… my input is as follows. 1. Daikin? Huh? No. Just no. Where do people find these brands? UV light is useless in a home unit. 2. Yes use two units. Two won’t even be enough since there’s no such thing as a unit that cleans 900 sqft. You’ll get closest with an Airmega 400 or a smart air blast, but in reality you want two good sized units for that space. 3. Haven’t had a chance to check out the winix 5510 yet, but indications are that it’s an updated 5500. Slightly better CADR, slightly quieter, and wifi. Hard to get if you aren’t ordering from winix (and therefore overpaying). But my first question is as always - what problem are you trying to solve? There are lots of great units.

    Grande pièce
  • Person51389 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Rabbit air vs blue air vs Coway

    You would probably be fine with some corsi Rosenthal boxes...as rabbit air is better for smoke/odors/VOCs I think.. They don't move much air.  Therefore a 90 dollar Levoit will probably filter more air than a rabbit air (which is great though if you have issues with odors/smoke/VOCs etc.) So the Coway Airmega would be better for allergens + general coverage.   Blue Air uses ionization and I am not familiar with what filter type they have.  So they are decent but again a corsi Rosenthal box will be bigger/move more air.  As a CR box will do 400 range CFM, whereas a rabbit air does I think probably 150ish for the unit you have.  And not sure which blue air unit you mean but a CR Box will beat out pretty much any 200-300 range purifiers and under.  The Coway Airmega is a powerful unit though that does 410-430 CFM though.  However it's 500 bucks or whatever ?  You can get the same CFM power from a DIY corsi rosnethal box.  (Cost about 60-90 bucks.).  So really - I would suggest maybe the Airmega + build two more boxes...and then you will have likely very good coverage.  As you dont just want one air change per hour, which is what normal CADR recommendations give I think...but for allergies you will probably want more likely 4x air changes per hour (every 15 mins) for really clean air.  So you will likely want more than the minimum.   Now if smoke and wildfire smoke is an issue then that changes the calculus a bit as the white Hepa material on a corsi Rosenthal does 0 for smoke + odors.  You need carbon strips and/or even better carbon pellets...which absorb odors in the air.  (As opposed to white Hepa that traps larger particles such as allergens etc.) So Austin Air is a great unit for smoke/odors/VOC and it's 750 I think.  But again it doesn't move a high amount of air.  A 90 dollar cr box will move way more air.  (Clear physical  allergens better.).  The rabbit air same idea, it has special carbon filters so good against odors + smoke + gasses essentially (VOCs i believe. ). But doesn't t move much air, so doesn't filter particles at any impressive rate.  But it is good that you have one, as you have some balance...to address smoke/odors/VOCs...(Make sure filter is up to date or else it's useless also.)...so then....you can focus on particulates and overall coverage so id get the Coway air mega 400 there.  (Note they use some kind of antibacterial coating on the filters, a fungicide but 0.000071% daily  exposure or some such on medium.  So fine for vast majority of people probably, however is someone ha allergies to pesticides/fungicides then may not be the best choice.) So again, depending on how much smoke/odors an issue depends on your answer.  But...you still need good overall coverage,.so the air mega 400 would provide tha base layer of protection.  As well CR boxes about as much CFR power for fraction of the cost so great way to add additional coverage.  (Best for 1 purifier in each room, a CR box in a bedroom is plenty so you can get smaller units there if space an issue, Levoit has good affordable small/medium units for bedrooms for instance.  Rabbitairs also perhaps fine there.  But you want a big unit in main area moving air.  (Blueair can also be fine for a bedroom/additional coverage, however keep in mind they use ionization and you may not be able to toggle it on/off as I think it's standard on those.  So if you haven't used an ionizer before I wouldn't get a unit that has that they can't even be turned off. As some with respiratory issues may have issues with it. Although I run an ionizer 24/7 with my RIA Breezeguard, but I can toggle it on/off if I needed.). So I would only get blueair if you know all occupants are fine with ionizer and instead get some other unit that you can test it via toggle on/off to see first on that.  (Maybe the Coway Airmega has I'm not sure.). You also dont need an ionizer, it's not the most important thing, although can help a little.  Most important thing for "regular" allergies....will be cleaning particulates /CFM power of white hepa.  If allergies to VOCs, gasses, and other things then you go more towards the slower carbon filter units like Austin Air, Rabbit Air, Alen is also a decent brand for that with thier best filters. (Also have lifetime warranty.)  IQ AIr also has some of the best untis overall I think,   but they are like 1,000.  You don't need to spend that much imo, can prob be fine with the Airmega + some CR Boxes, with your existing rabbit air too.  (But if people have the money, that's an easy choice.) 

    AllergiesGrande pièceQualité-prix
  • ewokxninja 🇬🇧

    2 commentaires analysés

    r/AirPurifiers · Deciding between Winix C909 and Coway Airmega 400 (Bay Area, CA, USA)

    I was originally thinking of starting w/ an AirFanta or 3D printing my own due to the lower entry costs and filter availability. [Here's](https://makerworld.com/en/models/1967959-cr-box-air-purifier-fits-airfanta-3pro-filters#profileId-2115774) a build that uses AirFanta's H11/E11 filters [and here's](https://makerworld.com/en/models/1860168-air-purifier-corsi-rosenthal-box-140mm-120mm-fans#profileId-1989423) a build that uses readily available/affordable [Filtrete MERV14 filters](https://www.costco.com/p/-/filtrete-air-filter-1-mpr-2500-merv-14-high-performance-premium-allergen-ultrafine-particles-bacteria-and-virus-filter-4-pack/4000181409?langId=-1), though without any activated carbon for VOCs.. While both AirFanta's H11 filters and the Filtrete MERV14 filters are not true HEPA, is my understanding correct that the H11 filters capture more particulates than the MERV14 filters? After talking all night with Copilot, its recommendation is to forego an entry-level CR box or the less powerful C909 and go straight for the Airmega 400, it's just I can't really justify the price of an Airmega 400 at this time. I feel like I'm stuck in analysis paralysis.

    Qualité-prix
  • Bitter-insides 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Best Value Air Purifier? (Coway, Winix, Blueair, Shark, Sans, etc)

    Just wanted to say your comments are so educational! I wish I had found this sub before purchasing my air purifiers but I did end up getting the Coway airmega 400 for my living room, coway 160 for my sons bedroom and have a few Costco winix in the other rooms. The coway sees to pick up much more dust and smells than the Winix. Currently have construction going on in our home and the coway have really picked up so much.

    Odeurs & COV
  • greyHumanoidRobot 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Canada Air purifier guidance

    Coway AirMega 400 is about 859 CAD which CADRs of 328 to 400 CFM for various particles. I can buy almost four North Box 5X units and equip them with United Filter MERV 13s for slightly more than the cost of one Coway AirMega 400. The CADR for four units from North Box beats the Coway 400.

    Grande pièceQualité-prix
  • boipinoi604 🇬🇧

    1 commentaire analysé

  • AnaKk1N 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Stop buying True HEPA / HEPA H13 air purifiers

    Generally viruses.I think that's what he's referring to. As for the "new purifiers are silent as hell", u/RodoKiD , in order for a H13 to be silent as hell, it needs to underperform way way worse than a H12. I'm 100% sure that "sleep mode" or speed 1 of a H12 is having a substantial CADR increase than the same speeds on a H13, since those speeds favors quietness. But I also agree in a way with that statement since I've seen certain H13 purifiers such as Coway Airmega 400 with a pretty good turbo speed dB-wise, given its CADR. That unit is a very high quality HEPA H13 unit. Could use lower dB at sleep mode but thats the nature of H13 showing its hands there.

    Chambre / nuitSilencieux
  • Not_A_Red_Stapler 🇬🇧🌐

    2 commentaires analysés

  • junkfort 🇬🇧

    1 commentaire analysé

    r/BuyItForLife · Coway air purifier reviews?

    Hopefully this is semi-useful: I picked up an Airmega 400 three years ago and it's been rock solid ever since. I've been running it basically 24/7 the entire time. The build quality is great and it's easy to open up and get to the filters. I haven't tried other Coway machines, but I'm impressed with that specific one. If you want to save as much money as possible, you could make a Corsi-Rosenthal box out of furnace filters, duct tape, and a box fan. They're not very attractive to have in your house, though.

  • xkegsx 🇬🇧

    1 commentaire analysé

  • rabidfox77 🇬🇧

    1 commentaire analysé

  • andraconduh 🇬🇧

    1 commentaire analysé

    r/BuyItForLife · What's the best air purifier for home right now that you swear by and recommend?

    I have two Coway Airmegas (300 and 400) and one Austin Air Bedroom Machine. They've all been running for 24 hours a day for over 5 years and have held up great. They are all easy to move around. The Coways are light and the Austin Air is heavier but has wheels. If you don't want to clean the outer filter at least monthly, don't get a Coway. If you can't deal with something that's pretty loud on the highest setting, don't get an Austin Air.

  • Dubai_Gamer_00971 🇬🇧

    1 commentaire analysé

  • benberbanke 🇬🇧

    1 commentaire analysé

  • BrianWally 🇬🇧

    1 commentaire analysé

  • yellowpinto 🇬🇧

    1 commentaire analysé

    r/Home · Tired of seeing 'just get a Coway' when someone asks for best home air purifier so here's an actual breakdown

    The Coway Airmega 400 sounds best for our needs, but I'd like to know from anyone who has one, if the running noise bothered their dogs. I just sent back my Mill food grounds machine because our new rescue dog couldn't stand the noise (which frankly I could barely hear). Our other dog didn't have a problem with it. And how is it on pet hair?

    AnimauxSilencieux
  • Annual_Grocery9557 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Rabbit air vs blue air vs Coway

    Wait until the Coway Airmega 450 goes on sale. This unit moves a ton of air if you can deal with the noise.I picked up a white one for about $350 around Christmas.I think the 400 was on sale a while back for $349.

  • NumerousAssumption47 🇬🇧

    1 commentaire analysé

  • J_b_Good 🇬🇧

    1 commentaire analysé

    r/AirQuality · RECOMMENDATION FOR MOST POWERFUL/ EFFECTIVE HOME AIR PURIFIER FOR DUST MITES, DANDER AND OTHER ALLERGENS?

    Your doctor's right about HEPA but yeah that's pretty vague lol. I got the [Coway Airmega](https://amzn.to/4picMJ1) for my daughter's allergies and it actually helped. The 400 model covers bigger rooms if you need that. Main thing is making sure it's the right size for the room. A tiny purifier in a big bedroom won't do anything. Check the square footage rating and go a little bigger than your room if you can. Also make sure it's a real HEPA filter and not "HEPA type" because that's just marketing garbage.

    AllergiesGrande pièce
  • Stonkinski 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Should I not get a Levoit?

    The displayed PM2.5 value on our 3 Core 600S is completely off by around +20ųg/m3 so need to ignore that and use a third party air quality meter. We have a Core 300s as well for the office which displays correct values, not sure what that's about. Other than that, they are fantastic at cleaning the air! We went for the bigger 600S for our 35m2 bedroom because it allows to have it on lower fan speeds at night for similar CADR as the smaller models at max speed which is too loud for sleeping. We live in a dusty climate and keep the device at speed 1-2 at night and the rooms PM2.5 and PM1.0 are consistently at 2-3ųg/m3 now. Best bang for your buck for sure. Coway Airmega 400 has the same CADR and costs 2x as much for example.

    Qualité-prix
  • finch5 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Coway Airmega 350 and 450 thoughts?

    How's the fight against dust going ten days later? I run my Coway to remove smells from the air, but it does little for dust around the house. We have a 400 and a 250 that run pretty much all the time.

    Odeurs & COV
  • Local-Bunch-257 🇬🇧

    1 commentaire analysé

  • Character_Leather659 🇬🇧

    1 commentaire analysé

    r/AirQuality · RECOMMENDATION FOR MOST POWERFUL/ EFFECTIVE HOME AIR PURIFIER FOR DUST MITES, DANDER AND OTHER ALLERGENS?

    I’ve dealt with allergies before, and from what I’ve seen, you definitely want something with a HEPA filter, but also a strong CADR (Clean Air Delivery Rate) for allergens, dust, and dander. One of the top models I recommend is the Coway Airmega 400. It’s great for large rooms and has a powerful HEPA filter that does a fantastic job at trapping dust mites, pet dander, and pollen. It’s also got an extra activated carbon filter for odors, which is a nice bonus if that’s an issue in your home. The air quality sensor is really handy too, as it adjusts the fan speed based on air quality in real time.

    AllergiesAnimauxCapteur & autoGrande pièceOdeurs & COV
  • No-Application-9365 🇬🇧

    1 commentaire analysé

    r/AirQuality · RECOMMENDATION FOR MOST POWERFUL/ EFFECTIVE HOME AIR PURIFIER FOR DUST MITES, DANDER AND OTHER ALLERGENS?

    I have allergies myself and four cats at home. After trying a few models, I settled on the Coway Airmega 400, and it’s been a lifesaver. It uses a True HEPA filter that traps allergens like dust mites, dander, and pollen, and it also has an activated carbon filter to tackle odors. It’s powerful enough to cover large spaces, so it’s perfect for living rooms or bedrooms.

    AllergiesAnimauxGrande pièceOdeurs & COV
  • Weird_Evening_50 🇬🇧

    1 commentaire analysé

    r/AirQuality · RECOMMENDATION FOR MOST POWERFUL/ EFFECTIVE HOME AIR PURIFIER FOR DUST MITES, DANDER AND OTHER ALLERGENS?

    I’ve been in a similar situation because I live in a home with multiple pets and allergies can get out of control if I’m not careful. I ended up going with a Coway Airmega 400, and it’s been a game changer for managing dander, dust, and allergens. It’s got a true HEPA filter and covers a large area, which was important for me since I wanted to filter air in bigger spaces without needing multiple units. It also has a smart mode that adjusts the fan speed based on air quality, which I thought was a nice touch.

    AllergiesAnimauxCapteur & autoGrande pièce
  • Housedodo 🇬🇧

    1 commentaire analysé

    r/AirQuality · RECOMMENDATION FOR MOST POWERFUL/ EFFECTIVE HOME AIR PURIFIER FOR DUST MITES, DANDER AND OTHER ALLERGENS?

    I’ve been dealing with similar allergies in my household, and I know how overwhelming it can be to pick the right air purifier. I ended up going with the **Coway Airmega 400** after doing a lot of research. It’s a bit on the pricier side but works great for larger rooms and does an excellent job with dust, dander, and allergens. The filtration system has a pre-filter for larger particles, a HEPA filter for smaller allergens, and a carbon filter to help with odors..

    AllergiesAnimauxGrande pièceOdeurs & COV
  • SufficientBunch4790 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Black Friday sale decisions

    I have 1-400 and 1-400s. I don’t think the smart features add much personally but the price was very similar between the two. They are very good purifiers.

  • musictomyomelette 🇬🇧

    1 commentaire analysé

  • Bicycleriding 🇬🇧

    1 commentaire analysé

    r/AirPurifiers · Coway or Clorox? Help, stuck in the vortex of online reviews.

    For a classroom of 750 square feet, you might need a larger air purifier so you can run it on a lower speed setting, where it will be quieter for your students. A Coway Airmega 400 or two Coway Airmega 250s might be more suitable, depending on your school budget. There are third-party filters produced by companies like Filter Monster which can make their running costs more affordable in the long run. For example, the [ Replacement for Coway Airmega ](https://filter-monster.com/products/co-400-fm1)400 is only $45 from them.

    Coût des filtresGrande pièceSilencieux
  • stumper225 🇬🇧

    1 commentaire analysé

  • MagnificentMystery 🌐

    1 commentaire analysé

  • BiluochunLvcha 🌐

    1 commentaire analysé

  • Ridingtheridge 🌐

    1 commentaire analysé

Souvent comparé à

Questions fréquentes

Le Coway Airmega 400 convient-il aux grandes pièces ?

Oui, les utilisateurs Reddit le recommandent régulièrement pour les grands espaces. Pour une surface particulièrement vaste, certains conseillent toutefois deux appareils afin d’obtenir un renouvellement d’air suffisant.

Est-il efficace contre les allergies et les odeurs ?

Le consensus Reddit est très favorable pour le pollen, les acariens, les squames animales et les particules. Le filtre à charbon aide aussi contre les odeurs, même si les retours sur la poussière déposée dans toute la maison sont plus partagés.

Le Coway Airmega 400 est-il bruyant ?

Les utilisateurs Reddit jugent son niveau sonore raisonnable au regard de sa puissance. Le choisir avec une marge de capacité permet de conserver une bonne filtration à vitesse réduite et plus silencieuse.

Faut-il l’acheter au prix fort ?

Le consensus Reddit déconseille largement l’achat au tarif normal, jugé peu compétitif. Les utilisateurs recommandent d’attendre une forte promotion, d’autant que les filtres Coway d’origine restent coûteux.