Coway - Airmega 400

Hi, I've 4 coway air purifiers at home (2 bkh). 3 cats furry cats, fabric sofas and couple of large carpets. I'm extremely sensitive with dust and I can feel it in my nose and throat even if it's very little dusty. After getting these coway air purifiers I feel sooo much better. I've used Dysons, Mi, blueair. Out of all of them I love the coways. I have a [Coway Airmega 400](https://uae.sharafdg.com/product/coway-airmega-400-air-purifier-ap-2015f/?cpn=21923874463&pl=&kw=&adg=173662259467&ch=g&utm_source=google&utm_medium=cpc&utm_campaign=LS_SharafDG_Std_Shopping_Bilal_18112024&utm_term=&device=m&utm_matchtype=&utm_network=g&utm_placement=&utm_content=721914495737&utm_Adposition=&utm_location=9198260&utm_Sitelink=}&utm_Audience=pla-2455809539967&utm_campaignid=21923874463&utm_adgroupid=173662259467&gad_source=1&gclid=Cj0KCQjwkN--BhDkARIsAD_mnIr3GqdSYguutizgQurZxifbzxMiU0evhunlX8jR6u0HUgUsoYxvx3MaAvuyEALw_wcB) next to my bed. 2099 AED. I have two [this coway ](https://amzn.eu/d/eT6O53i) in my living room next to the sofas. 999 AED. I have [this one ](https://amzn.eu/d/4pX6sKS) under my work table. The one feature I miss is WiFi connectivity/app to adjust the fan speed or check air quality. Edit: spellings. Edit 2: I use [roborok Q revo S ](https://amzn.eu/d/esM6sND) to keep the floor and carpets dust and fur free.

And I have one of these. Excellent. https://a.co/d/gasvCT5

That thing looks like a beast. I have one of their 400 series units and love it. I do wish the filters were cheaper though, and kind of worry that they're going to stop making them at some point.

The 250 is the best one you listed but if you can splurge for a 300 or 400 from Coway that would be even better. That's a large room you're trying to clean the air for.

UVC is pointless, so don't focus on that. As far as which purifier, I'm assuming your home isn't 1,800 square feet of one giant open concept room. So you'll need as many air purifiers as rooms you want it to work in. They really won't work through doorways, walls, or hallways. At least not to any extent you can count on. You should also be shooting for 4-5 air changes per hour. Idk how large the two rooms are that you're shooting for getting an air purify for, but given the size of your house, a Coway 300/400 is probably not overkill, for example.

You'll need something that pulls in air from the front, or from the sides so long as there are no obstructions to the right and left. Some units that might fit your needs are the Coway 300/400 or even the ProX if you really want overkill. The EverestAir from Levoit is the right form factor for you but I just noticed it's not rated for a room as large as yours so ignore that. Or something like the Alen 75i might also fit.

We usually recommend Coway or Winix depending on budget. Smart Air make some good products too. > ideally I imagine choosing one medium/large size unit to do the whole house, OR two small sizes,  We recommend getting multiple large units. This increases efficiency. But you don't have to buy them all at once. Larger units are recommended because they can be run at lower speeds where they are more energy/noise efficient on good air days. On bad air days they can kick into higher gear and manage problems like wildfire smoke. Multiple units are recommended because they distribute clean air to different areas of the space reducing the reprocessing of clean air. But you don't have to get them all at once. You can buy one large unit for one room and then scale up to multiple units as you see how well you control particulates. We recommend installing an air quality monitor in each room. The cheapest option we know is the [VINDSTYRKA air quality sensor, smart - IKEA](https://www.ikea.com/us/en/p/vindstyrka-air-quality-sensor-smart-30498239/). Its humidity sensor is inaccurate, but the PM 2.5 sensor is the best available for $50. >cost < $500 The [Coway Airmega 400S Smart Air Purifier | Home Air Purifier, Wifi-Enabled ](https://cowaymega.com/products/airmega-400s) is currently $479. It's easy to control with Apple mobile devices (with Android devices it asks for more intrusive permissions) and it can be run on a schedule to turn on/off when you leave for work. It won't be able to clean your whole house or even your whole floor. It's perfect for medium sized rooms if you install one unit in each medium/sized room. It's not always ideal for bedrooms as it can have issues with vibration on hard surfaces when run on the lowest speed setting. For bedrooms with uncarpeted floors we recommend the [Coway Airmega 250](https://cowaymega.com/products/airmega-250) or 250s. >narrowed down to are Alen, Levoit, and Honeywell. From these brands we would recommend the [Levoit 600s](https://levoit.com/products/core-600s-smart-true-hepa-air-purifier) as it has a good CADR rating for smoke. It would be suitable for a medium sized room. >OR two small sizes, one for the basement and one upstairs (and they would both reach the middle floor, right?) please tell me what you think about this. Having an air purifier running in one room can reduce particulate levels in the whole house. But it will struggle. [A single very powerful air purifier on high was able to purifier the floor of an apartment.](https://smartairfilters.com/en/blog/air-purifier-living-room-clean-entire-house/) It's more efficient and effective to install a separate air purifier in each room of the house. The running costs of having multiple air purifiers will not always be higher. When using multiple units filters will last longer and they can be run on energy efficient speeds on good air days.

The Airmega 300/300s is almost the same design as the Airmega 400/400s, but the 300/300s has a lower CFM than the Airmega 400/400s. So if you like the design and functionality you may as go for the Airmega 400/400s if you have space for it, it's like the size of a small mini-fridge/hotel mini-bar.

>My home is 800sq feet, Your goal is to reduce PM 2.5? Have you installed air quality monitors yet? It depends on your ventilation level and outdoor air pollution level. The best choice for most houses would be to install multiple powerful air purifiers so you can run them on low speed on normal air pollution days and run them on high during high air pollution days and events like wildfire smoke. For 800 sq. ft the ideal would probably be 4-5 air purifiers even if it's quite open plan. For non-ionizer products maybe a mix like 3x Coway Airmega 400s + 2x Coway Airmega 250. On the low speed settings these are quiet. But you still want use the high speed setting when there's smoke outside or inside. >when Ionizer feature is turned off *should not admit ozone*, but I read further reviews and find that some of them *still produce ozone even when the ionizer is off*  The ionizers used by manufacturers like Winix and BlueAir don't produce any harmful level of ozone when they are on. They are approved by the California Air Resources Board. The level of ozone is almost too small to be detectable. Winix also have an off switch for the ionizer function. But if you really don't like the ionizer even when it's turned off there are air purifiers like the Coway Airmega 250/300/400 which don't have an ionizer.

>3 Coway 400 ($419) and 2 Coway 250 ($299)- = $1857 - prices taken from Coway website. I don’t disagree that these would need to be run on low speed due to noise but that’s a lot of money to spend It is the price of a laptop or a good fridge or some mid-range furniture. It's not a lot of money for appliances you put in every room and use every day. For many households they still don't look luxury enough to put in your living room. I think they have a large profit margin and the cost of production of the units is probably multiples lower than the MSRP. The Airmega 250 is made in China, the 400s is made in Korea. Still, the Airmega 250 and 400s are nice good quality feeling products. They are acceptable for most consumers to interact with them and actually use them. The design of the Airmega 400s can be divisive with spouses, but the Airmega 250 is very easy to accept and put in your house for small rooms. There's even an [art model of the Coway 250](https://cowaymega.com/products/airmega-250-art) (which has a significantly lower CADR for smoke than the normal Airmega 250 so only advisable for very small rooms). They are something people might accept putting in their house and using regularly. They have third-party filter support and the filters don't need to be changed often for many users. For those with smaller budgets, we can avoid recommending Coway and [recommend cheaper alternatives like strapping an IKEA filter to a fan](https://www.reddit.com/r/AirPurifiers/comments/1ckswjh/comment/l2p9jmz/). But many people here can afford brands like Coway and Smart Air. >because of the fundamental flaw of being to loud. I don't think it's a flaw of being too loud. Only on their highest setting are they relatively loud and energy inefficient. You need the highest setting when there is smoke or you want to bring down PM 2.5 quickly. It's good they include the highest setting on air purifiers as you still use it when there's smoke or wildfire season. You want to blast the air purifiers on the highest setting until the PM 2.5 comes down to the healthy range. Most days they will be able to keep PM 2.5 low without using their highest setting. Sometimes you need to blast them though.

We recommend the $160 [Winix 5500-2](https://www.amazon.com/Winix-5500-2-Purifier-PlasmaWave-Reducing/dp/B01D8DAYII) for a cheap option. The larger $350 [Coway Airmega 400 ](https://www.amazon.com/Coway-Airmega-Purifier-sq-ft-White/dp/B01C9RIACG) is good for kitchens or living rooms. For bedrooms the Coway Airmega 250s but that's not on sale right now.

A few people have recommended Coway and I agree. We have the older version of the Airmega 400 and its great; I bought it in 2018 and it is still working perfectly. No it isn't super quiet on the highest speed, but we keep it all the time on the "smart" setting so it kicks on when it needs to. Our current space is about 800 sq ft and it's rated up to 1000 sq ft. I've had it running basically non-stop on the "smart" setting since we moved to our new place in January, we put new filters in and they are about a month away from replacement. We have to clean the pre-filters every month or so, and I vacuum out the exposed sides of the HEPA filters every time I do that. The filters are expensive because they are real HEPA, you can buy knockoffs, but honestly I buy the Airmega branded ones.

I run 24 /24 my 3 Winnix from Costco( good value but 5 year max life span) and one Rabbit (has been bullet proof for 15 years) , but recently bought a Coway 400 on sales for BF. Super impressed with quality built, how quiet it and CFM rating. I will buy another one once one other Winnix is done. Highly recommend the Coway 400 series with dual 2 filter systems.

I’ve got an irrational number of purifiers for wildfire smoke. Coway AirMega 400, Medify MA-112, Austin Air Healthmate Plus, and a handful of Blue Airs. Austin Air means business but it’s ugly and expensive. Medify is great, Coway pretty close behind. Blue all pretty much suck for Wildfire. Fine for general use.

There are many tests of these units which confirms their ability to filter. I use BlueAir 121 units I picked up from Costco before they stopped selling them. The pre filters pick up a ton of dust, but the actual filters don’t show as dirty as many other units because there is so much more space on them. Think about it - this Winix model shown has a filter less than the size of a single side of your BlueAir. All of the fine particles are spread out amongst four sides. This is why they last so long. I purchased a Coway Airmega 400 for my parents who foster senior pets. They aren’t as energy efficient, but they have a high quality carbon pellet filter and filter the same amount of space as the BlueAir 211 model.

+1 . I have two of these for allergies (different locations). One is 6-ish years old, the other is two. Never had an issue, they work great. The smaller Conway that gets all awards uses the same filter but just one filter instead of two so I covers a smaller area. Works great for dust, cat dust bunnies and even for smells etc when you eff something up in the kitchen.

I agree with others. Coway. Which model really just comes down to size of room they all use the same type of filter (though sometimes different sizes). I have a couple AirMega 300/400s because I have a big open space and they've been great. But the smaller ones are the same tech and filter type, just smaller.

The air Fanta is a corsi rosenthal box. You can make those yourself. I have the coway 400 and it’s welllllll worth the money.

Coway is regarded pretty highly I just bought an airmega 400 but something like the airmega 1512 has been a top performer in its class and it's on a sale RN for 165.

Get yourself a Coway Airmega 400 and forget about the rest of it. It's has dual HEPA filters with thick layers of activated charcoal (for voc's) over each filter. It will keep your air cleaner than it has ever been, with or without the printer running. Do some reading, indoor air quality is notoriously bad. When I cook something in the fry pan my filter air quality light always pegs purple (dirty air) and the filter kicks on high. This thing moves tons of air at a low noise level. I have two of the big boys and two of the smaller ones.

I have a levoit Core 600s and a Coway Airmega 400 both are excellent and keeps the PM2.5 down. Both are true hepa filters, and I have third party sensors on each floor (awair elements) that verify that they do a great job. I didn’t get the smart coway because the premium wasn’t worth it when I have other sensors for direct measurement. But the levoit is smart and its PM2.5 sensor is within what I would expect for a margin of error from the awair element. The two of these on low with the furnace filter I don’t even smell smoke in my 2k sqft house.

Also have a 400 series. I was a little hesitant to spend that much on an air purifier but it really is a solid unit.

I ended up getting a coway airmega 400 for about a 500sq ft area with 8ft ceilings since it had one of the largest cfm and was 400$ post tax compared to the medify at 600ish, we’ll see if dust continues to build up

I have a 2 Coway 400s. One is the dining room, and one where I sleep. I’m more than positive there is mold inside my bathroom walls. Due to family “issues” the mold in the walls is not being remedied. Are you saying that the Coways can be helping what I am breathing in? I’m in a 1300 sq ft home. Dry climate, SoCal.

At school/work they have Austin Air Hepa purifiers, but they are crazy expensive. At home I have 2 Coway 400s. The ones w/o the wifi. LOVE them!!! I am considering making a CR box for my classroom or two small ones. I've been thinking of this all week! Came back to edit this. I just remembered the sound f the CR boxes. I'll investigate how loud small ones are...

Well, he mentions to make your own as there will be more air flow. The problem with that is, it’s too large for a classroom. Some teachers where I work, bought small fans and taped them together with Hepa filters. I think they are 10x10 fans. At my house, I have 2 Coway 400 and a diy one. I think the Coway would be too big for a packed class. Maybe check out this site in Amazon for smaller.

Coway 400/non Wii fi. It is usually in the living room, but the highway pollution keeps getting worse.

I bought a few during COVID. A couple are cheap Costco ones (Winix), but one is a fairly expensive Coway Airmega 400. Can't say I noticed any difference in my health or in the amount of surface dust landing on furniture. I think to see any real reduction in dust settling on furniture, you would probably need to run them on high to get a lot of air movement, but the noise of them running on high is annoying IMO.

Another second on coway. The airmega 400 series are great!

I’ve got two Coway Airmegas (300 & 400). They’ve lasted for years and work so well, definitely worth the cost. Filters can be expensive but don’t need to be replaced as often as other purifiers. Just made it through the LA wildfire air quality issues bc of my Airmega robot buddies.

I have a Coway AP-2015F Airmega 400 Smart Air Purifier. Seems to work well, but who knows.

Coway Airmega 400! Love mine. And looks great. Don’t need the 400s version.

I started with the HATHASPACE HSP003 when the smoke rolled in and it handled ash and odor in my living room pretty well. After a few weeks I needed something for my open‑plan space, so I upgraded to the Coway Airmega 400.

I have 2 Coway AirMega 400 and 2 Honeywell HPA200s covering 1500 sq ft. I have one of the Coways in my bedroom of around 350 sq ft. Normally on 3-4 turning it down to speed 2 at night.

Buy a cheap Temu air purifier with cheap Temu filters.. Will do as expected and you can replace in a year or less when it burns up. Or buy a good quality Coway airmega 400 unit on sale for $369 at Coway and run it 24/7 for years. Replace HEPA filter 1-2 times yearly because it’s actually doing its job. The household will thank you for not being cheap and making everyone’s allergies/life better.

As I mentioned in my post, the purifiers can be run on lower speeds. But the trade off is the CADR is quite low. It’s wildfire season in Canada= risk of elevated pm levels until the fall, possibly weeks at a time. Running the purifiers on low won’t be enough. They may also be dealing with allergies or want to mitigate viral transmission. Both of which require 5-6 air changes per hour, running the purifier on low or medium won’t be enough. Coway 400 is $679cdn. 283 CADR smoke. Noise level: 52 db. This is Terrible value. Levoit 600s $459cdn. 410cfm (smoke CADR is prob lower ?) Noise level: 55db The things aren’t cheap in Canada. OP should take the guesswork out of this and use AHAM’s advice if getting CFM to 2/3 of the space square footage and also buy purifiers that are low noise on high cause wildfire season is long and no one likes the sound of jet engines in their house. https://ahamverifide.org/how-to-choose-the-best-air-cleaner-for-your-home/#:~:text=The%20most%20important%20detail%20to,CADR)%20and%20suggested%20room%20size.

You suggest 3 Coway 400 ($419) and 2 Coway 250 ($299)- = $1857 - prices taken from Coway website. I don’t disagree that these would need to be run on low speed due to noise but that’s a lot of money to spend because of the fundamental flaw of being to loud. 800 square feet doesn’t mean OP needs 5 purifiers, I guess they might if they have 5 rooms. Butbrefaowe can calculate exactly how much CADR is required. 5 Ach for 800sq ft with 9 foot ceilings means 600 CADR. IMO OP should get quiet purifiers that they can run on high and spend way less. Which means purifiers with 40db or less on high. For example: Clean Air kit xxl Luggable - 410 CADR, 39 db, 13 w, $233 Clean Air Kits XL Luggable 323 CADR, 37 db, 11 w, $200

Coway or Levoit are the top brands when it comes to air purifying but you’ll pay a tag for them - they are extremely good and you can definitely see and feel the difference in the air. I do have 3 Coway Airmega 400 in my appartment (master bedroom, second bedroom and living room) and even though it is overkill it’s doing great job

We bought an Airmega four years ago (the last big wildfire year in California's bay area) and it's been a terrific purchase. It helped then with that acute problem, but it also helps keep particulates low year round. It's quiet, doesn't take a huge amount of space, and it makes a noticeable difference in the main living areas of our home (I don't expect it to work in bedrooms at the other end of the house). Do recommend, but the Coway app is pretty crappy.

We have an Airmega 400 in our main living area and it's been going strong since the 2019 California wildfires. We have to vacuum the pre-filters about every 2-3wks, but the HEPA filters last months. The app is somewhat crap, but it has physical buttons to control the fan speed (or put it in "smart" mode, which is the default). We replaced an Idlys air purifier from Home Depot with the Airmega and it's a night & day difference.

If you're actually trying to combat allergies your probably going to need at least two air purifiers in your great room / kitchen area to actually have an effect especially with the 11 ft ceilings. I have two similar CADR purifiers in a similar size area and I would consider that to be the least amount of recirculation I would want. So you know the Coway 400 does leak a bunch of air around the filter. It's an unfortunate design flaw as I really liked everything else about it but it isn't a very effective air purifier. I would definitely look into air purifiers for the bedrooms separately and just remember that whatever the manufacturer advertised as the size the purifier will clean divide that in half for a realistic number. With air purifiers more is almost always better. To combat allergies you want a minimum of 4 air exchanges per hour and realistically I would aim for 6.

Two Coway 400 purifiers will do it - they have two HEPA filters (one on the left, one on the right) and are rated for like 1500 sq ft. We have them in the common areas at my work

I have a couple Winix 535s and they still work but two of them are starting to have noisy/whiny motors. Last black friday I got a Coway Airmega 400 from Amazon when it was on sale and it is a beast - highly recommend it, it moves about twice as much air as the medium-size Winix.

I have several Coway Airmega 400 purifiers which are very good and rated for large spaces. Though there is now the Airmega Pro X which is rated for 4,253 ft2, though I think that's probably a huge overstatement given the 400 is was rated for hundreds of square feet when I got them, not thousands. I think more purifiers spread out would probably work a little better, but managing one big one will be easier. If you're feeling handy you can make a big air filter out of furnace filters and a box fan. [This page](https://cleanaircrew.org/box-fan-filters/) has a lot of examples. There is also the Coway Noble, but I don't know how to get it in the US and it's honestly gimmicky because it tries to be exciting looking.

I don't think those will be effective in such a large open space. For heating and cooling, with what you could spend on a couple of those Dysons, you could get a mini-split heat pump for heating and cooling. As a purifier the BP04 will be okay but you can spend half as much for better performance with a Coway Airmega or Nuwave Oxypure. You could build a Corsi-Rosenthal box for the best performance to price, but DIY isn't for everyone.

Update: got the Coway Airmega 400 because it happened to be extra on sale when I looked. Placing it centrally and the smaller unit in the bedroom works for certain meals. Other meals that involve heavy cast iron use (ie steaks or chicken), opening all the windows to get the majority of the smell and then using the air purifiers for the lingering smells work. Overall, it’ll work for our current setup and we’ll probably just modify certain meals in the wintertime.

Coway airmega 400 has gotten me through two terrible fires where it was raining ashes. I can’t recommend it enough. It’s only $350 on Amazon right now. One won’t be enough for the square footage though. That one could go in your living space but I’d recommend a smaller one for each bedroom.

Unfortunately I recently returned two of my 400 models. I used to get a lot of vibration and loud buzzing. Out of curiosity do you have this with yours?

I've been running an IQAir and Conway Airmega 400, previously had. Blueair that is no longer made which has a noisy fan bearing after a number of years, so chucked it. I now have a different Blueair (511) in my office. It's not a workhorse and I wouldn't rely on it as my main air purifier, but I needed something for a small space and it's fine. The IQAir Healthpro is pricey and not absolutely silent on low, but I have faith that it'll last another 10 years. It's no-frills, just set your speed.The Airmega is fancier because it has a particle detector and will auto-adjust speed. Its slowest fan speed is basically silent. When I burn things in the kitchen, it's quick to clear out the smoke, so I know it works well. Conway has a number of products in your price range that I would recommend you look at. Why do I have so many, you might wonder? Old house with lots of ceiling penetrations and a lot of pollen that we're allergic to...

I spent $500 on one online. It takes care of my 1500 sq foot home very well. Conway airmega400. If it's not allowed to put that here, remove it. I don't like smells in my home and have allergies. This is fantastic. I didn't use a furnace attached one because they only work when it's running

They absolutely work at filtering particulate matter (PM) from the air, and PM is liked to millions of premature deaths every year, it is especially harmful to children, plus it is causally linked to the onset of certain diseases. The do not work very well at filter volatile organic compounds (VOCs), unless they are specialized units with massive carbon canisters. Consequently, they are not effective at removing odors unless they are one of these specialized units. In your stated case, you're describing particulates, so you do not need a specialized unit. You simply need enough filtration to cover your home. What size is your home? Generally, multiple smaller units are more effective than a single, large unit. The Winix 5500-2 or Winix AM80 (they are the same product with a different look) and the Coway AP-1512 represent the best values between airflow, features, energy efficiency, and filter replacement costs. These provide optimal filtration for up to about 400 square feet per unit. Multiple units throughout the home in different areas will achieve the best results. The larger Coway AirMega 400 is on a great sale right now. This is a good unit. While Coway advertises it for covering over 3,000 square feet, this is not accurate (and is 'optimistic' marketing), and it will provide *optimal* filtration for around 600-700 square feet.

Coway 400 has been great for us!

You have atleast 3 really good options in Australia. I am in NZ and have mix of Smart Air SA600, Blast and Blast Mini covering entire home. You need lots of charcoal in air purifier to remove smells. Ozone is bad IMO. Aussie made with around 5.5kg charcoal is Inova air purifiers https://inovaairpurifiers.com.au Smartair - Blast has 1.1kg charcoal which is there biggest model https://www.bsthealth.com.au/air-purification/air-purifiers.html Coway Airmega 250 or 400 https://www.amazon.com.au/s?k=coway+air+mega&crid=33RTBMZJEGJMB&sprefix=coway+air+mega+%2Caps%2C265&ref=nb_sb_noss_2 You need to look at CADR and how many air changes does the air purifier offers for the space it’s going to be covering. At minimum it’s good to have 5 air changes. The Medify is 4 air changes covering a very small area and it’s also very loud.

Levoit Core 600s if odors aren't a huge consideration. AirFanta 3Pro isn't the most aesthetic device but it covers a large area (650 sq ft) for a very reasonable price. Coway Airmega 400 is a good device. I would wait for a sale. Smart Air Blast Mini or MKII if you have a large budget and don't need to move the devices often.

I have two Coway Airmega 400s in different rooms and they clear scent from the air really well. They also help with off gassing. When I got my mattress and took it out of the plastic, the off gassing was intense and I was getting sick which is why I got the first Airmega. Not only did it clear the odor but I stopped having bad reactions to the mattress too. It’s possible that you just need a larger unit? I’ve had a lot of air purifiers and these are my favorite.

Yeah that’s really disappointing bc they’re so pricey. If you can swing it maybe try out the bigger one and return it if it’s not getting the job done. I use one of them in my bedroom which is pretty small. Maybe it’s overkill and that’s why it works so well haha

Just got one of these after trying out the Airmega 1512. The 400 is a BEAST and well worth the money if you have allergies or are immunocompromised. OP, always get one that covers larger than the space you need covered so you get more air changes per hour. Also, if you have carpet, get a bagged vacuum.

I have 4 coways 2 400s and 2 240s love them

Coway 400 love it!

I have an Airmega 400 and BlueAir 7700i. BlueAir has better performance but the filters don’t last long

I’ll have to check for you. I do like it. Between the 2, they keep my indoor AQ pretty decent.

Coway Airmega 400 has been great so far. I placed mine in our office where we keep the cat’s litter boxes and it has made such an extreme difference. It doesn’t smell as much anymore (and we clean their boxes daily), and there’s a significant decrease in dust/dander as well. I have pretty serious cat allergies and it’s much more manageable to sit in there for extended periods of time. Granted, the 400 is a bit overkill for an office but it was on sale and seemed like a steal.

We generally don't advise a combined humidifier and air purifier unit. Pushing very moist air over mechanical filtration is not advised, as it could degrade or cause microbial growth on the filter media. Levoit wasn't even mentioned in the [old buying guide](https://www.reddit.com/r/AirPurifiers/comments/w4uhgf/air_purifier_buying_guide_read_before_asking/). We (or really rather one of the moderators here) tend not to recommend cylindrical air purifiers for particulates. This is due to a concern that cylindrical or otherwise round units may have underpowered motors which must operate at higher speeds to provide adequate air flow. This can lead to motor burnout or a shortened purifier lifespan. Additionally, these units tend to have integrated pre-filters which are not ideal. A separate permanent pre-filter is best generally, as they're easier to clean and there's less risk of damaging the HEPA media. I would say Coway has better build quality than Levoit or Winix. If you're treating for dust storms, I would increase the CADRs beyond the minimum 2/3 of a room's area (with an 8 ft. ceiling assumed). You can have all the smart features you listed if you choose a Coway purifier with an "S" appended to the model name. Most Coways look pretty nice IMO. None of these units have much activated carbon for odors, but then again it's not a primary concern for you. For your bedroom, a suitable model would be the [Coway Airmega 250S](https://cowaymega.com/products/airmega-250s). Your living room is a bit trickier if it's about 3x size of your bedroom (living room: 576 sq. ft.). Minimum CADRs here should be 384 CFM, but should probably be at least 400 CFM - 500 CFM for dust storms. Unfortunately there's no one Coway model to fit the bill. Both the [Coway Airmega 300S](https://cowaymega.com/products/airmega-300s) and [Airmega 400S](https://cowaymega.com/products/airmega-400s) have lower CADRs. In this case, you need two purifiers in the living room potentially (mix or match the models mentioned above).

An Austin Air and a Coway Airmega 400 are designed for somewhat different uses. Do you want to filter particulates (dander, pollen, PM2.5, smoke particles, etc.), gases/vapors (VOCs, odors, etc.), or both? If you have high levels of both particulates *and* gases/vapors, you really need *two* different types of air purifiers. While there's some particulates filtration, an **Austin Air**—alongside other sorbent media purifier brands like Airpura, AllerAir, or something from IQAir's GC/GCX series—runs at lower airflows and CADRs because of the amount of activated carbon or zeolite. You need to design for ["dwell time" or "residence time"](https://www.emcelfilters.co.uk/carbon-filters-frequently-asked-questions/) for better gaseous removal efficiencies. Sorbent media purifiers are also loud, expensive, and require relative humidity below 60% to present water vapor from being adsorbed. The Austin Air isn't the best choice for reducing particulates in a large room. An FYI up front: air purifiers aren't very good for reducing pet hair or visible dust. Both of these particulates are relatively large and heavy compared to something like PM2.5. Therefore unless either visible dust or hair is very close to the air purifier, both will fall and collect on surfaces. A [DIY Corsi-Rosenthal box](https://engineering.ucdavis.edu/news/science-action-how-build-corsi-rosenthal-box) could give you improved CADR for larger particulates, but some people don't like the homemade look, the noise, or the required floorspace needed. Vacuuming and dusting are still the best methods for controlling pet hair. # Some Calculations The rule of thumb for CADRs is that they should be *at minimum* 2/3 of your room's area. This assumes an 8 feet high ceiling. To figure out CADRs using volume, you need to do a little more arithmetic. Calculate your room's volume. 12 ft. width × 15 ft. length × 18 ft. ceiling = 3,240 cubic feet Then... 3,240 cubic feet ÷ 8 ft. = 405 sq. ft. Finally, 405 sq. ft. ÷ 1.5 = 270 CFM (CADR) **270 CFM is the absolute minimum needed for CADRs.** The **Coway Airmega 400** will be underpowered if you have to filter wildfire smoke. The [Association of Home Appliance Manufacturers (AHAM) recommend a smoke CADR equal to your room's area for wildfire smoke](https://ahamverifide.org/ahams-air-filtration-standards/). Again, room area in this instance assumes a 8 feet high ceiling. In your case, you would need a **smoke CADR of 405 CFM**. 3,240 cubic feet of room's volume ÷ 8 ft. = 405 sq. ft. 405 sq. ft. = 405 smoke CADR for wildfires # Other Considerations In this subreddit, we generally recommend oversizing an air purifier or using multiple air purifiers in a given space. This means you get more clean air faster. With multiple air purifiers, you can increase air circulation. Oversizing is also recommended where higher levels of pollution are persistent. Another issue is sound or noise levels. Despite the specifications, many air purifiers tend to be quite loud on high. Many people don't like the highest setting, but lower settings have lower cleaning performance. Most CADRs are given only on the highest setting. Therefore, oversizing a quiet purifier can make more sense. Or you can buy multiple and run them on the quieter, lower settings. If you do buy one larger or multiple purifiers, be sure to check the power consumption values. Some units are more efficient than others. If your budget allows and you have the floorspace for a dual intake unit, the **Coway Airmega ProX** has high CADRs and would be great for wildfire smoke events. Its sound rating is 23 - 46 dB(A); I don't know how closely sound performance matches the specs. While it's expensive, I've seen prices as low as $619.00 during special Coway sales events. Link: [https://cowaymega.com/products/airmega-prox](https://cowaymega.com/products/airmega-prox)

So, your room is 180 sq. ft. What's the ceiling height? FYI: air purifiers aren't very good at significantly reducing visible dust. It's large and heavy relative to smaller particulates such as PM2.5. Therefore it tends to fall and settle on surfaces unless very close to an air purifier. Secondly, most common air purifier brands have too little sorbent media (e.g., activated carbon) for gases, vapors, or odors. You need pounds of the stuff. Therefore, you need two different kinds of air purifier if you have a particulates and a gas/vapor/odor problem. [Per AHAM](https://ahamverifide.org/ahams-air-filtration-standards/), particulate Clean Air Delivery Rates (CADRs) should be *at minimum* 2/3 of your room's area (assuming an 8 ft. ceiling). For wildfire smoke treatment, Smoke CADR should *equal* your room's area (again, with an 8 ft. ceiling). But you would need to seriously oversize by way of higher CADRs to capture more dust or to handle high pollution levels such as those from a log burner. For particulates, the **Coway Airmega 400** ([currently $459](https://cowaymega.com/products/airmega-400)) could be a great choice for particulates. The [filter set is $129.00](https://cowaymega.com/products/airmega-400-max2-filter-set). Keep in mind the listed CADRs are for the highest speed setting only. Lower speed settings have lower CADRs. As for gases/vapors/odors, you could build your own configuration via **AC Infinity**. They have [refillable carbon canisters](https://acinfinity.com/refillable-carbon-filters/), [inline fans](https://acinfinity.com/inline-fan-systems/), and [air filter boxes](https://acinfinity.com/air-filter-boxes/). But they only sell untreated/plain activated carbon. This kind of carbon does not have high removal efficiencies for all gaseous "species". For that, you need modified activated carbon or another sorbent media.

The WowStep looks to be the cheap dodgy stuff you find on Temu or Amazon. I would avoid most cylindrical or round air purifiers as their motors tend to be underpowered. To compensate for lack of power, the motor or blower fan must spin at higher speeds which can lead to premature burnout. (The exception to this rule is for specialized sorbent media purifiers, e.g., those with 15 pounds or more of activated carbon for gases or vapors.) We would need to know your country of residence, room size in square meters or square feet (assuming an 8 feet or 2.4 meters high ceiling), and if you have a budget. As a general principle, Clean Air Delivery Rates (CADRs) should be at minimum 2/3 of your room's area. Given you have allergies it's best to "oversize" a purifier or possibly buy multiple units. Purifiers that last the longest are going to be commercial or industrial grade, usually intended for healthcare or pharmaceutical sectors. The Abatement Technologies HEPA-CARE HC600FUV Air Purification System claims to use a "motorized impeller rated for 100,000 hours of maintenance-free operation" or 11.41 years. This unit is for hospitals settings where continuous operation and single-pass efficiency are required. The HC600FUV costs an enormous $5,174 USD. The replacement HEPA and UV light filter alone is $640.90 USD. **Coway** As someone else suggested, the **Coway Airmega ProX** air purifier would be a great choice for residential usage (assuming rooms of a certain size). However, I don't think this model is available in the United Kingdom or via Coway Germany's website. Therefore its European availability is likely non-existent. What you can do—assuming you have the floorspace—is buy multiple air purifiers to increase CADRs. You could do this with the **Coway Airmega 400** air purifier for instance. (Top CADR is 677 m³/h and top Noise Level is 52 dB.) This model is available from Coway Germany's website for €699.98. **Smart Air** My next suggestion is the **Smart Air Blast MKII Air Purifier**. Its top CADR (for dust) is 950 m^(3)/h. At top speed, its Noise Level is supposedly 43 dBA, so very quiet. The housing is steel and it has locking casters so you can move it around. But its European availability is spotty. If you can get it, keep in mind the United Kingdom version of the Smart Air Blast MKII's power supply is 220 – 240 Volts and 50 – 60 Hz with a UK style plug. The price in the UK is £642.00 (inclusive of VAT). The "Global" version of the Smart Air Blast MKII uses 220 – 230 volts, 50 – 60Hz, and a Type I style plug.

I'll add to the consensus that Shark is poor quality. OP, do you know what substances trigger your child's asthma? The only issue is that if any triggers are gases or vapors, most common air purifiers do not have enough activated carbon for long-term removal. Furthermore, does air purification need to run throughout the night? Keep in mind most air purifiers' Clean Air Delivery Rates (CADRs) are for the highest setting which is the loudest. (I have a Winix C909 that's really loud on Turbo.) If you want to increase CADR without a tremendous rise in sound levels, you can place two purifiers in your asthmatic child's room and run them at lower settings. You also generally need an air purifier for each room or area if the asthmatic child will be present there. Freestanding air purifiers can't overcome walls and doors. Another helpful measure could be looking into [whole house cabinet air cleaners or purifiers like AprilAire](https://www.aprilaire.com/whole-house-products/air-purifiers). Instead of a standard 1" thick filter on your air handler or furnace, these filters are 4" thick. The thicker filters have more surface area to capture pollutants from being recirculated and usually create a lower pressure drop which is easier on your HVAC equipment. Obviously the exact cabinet air cleaner size needs to be assessed by an HVAC technician unless you are handy and know how to calculate proper sizing and filter choice via equipment design specifications. Just to be clear: whole house cabinet air purifiers don't target pollutants generated *within* a room immediately (from cooking, pet dander, dust mites, shedding textile fibers, burning candles, dead skin cells, etc.), but can reduce particulates from being recirculated by your HVAC and clogging up the coils. As for freestanding particulates air purifiers, I agree with on Coway being a higher quality brand. I think the [Coway Airmega 240](https://cowaymega.com/products/airmega-240) is very good for smaller spaces (or if you want to buy multiples of this model for the asthmatic kid's room in particular). The [Coway Airmega 400](https://cowaymega.com/products/airmega-400?variant=33436457009287) is excellent for pollen and very good for dust (it has lower performance for smoke particles) and is heavily discounted. Coway is having a Halloween sale as I write this, but I don't know how much longer it will last.

So I'm assuming you're filtering particulates only. [Per AHAM](https://ahamverifide.org/ahams-air-filtration-standards/), Clean Air Delivery Rates (CADRs) should be *at minimum* 2/3 of each room's area (assuming an 8 ft. ceiling). For the living room, CADRs should be at least **334 CFM**. The master room needs CADRs of **134 CFM**. We generally recommend **Coway** first because of the higher build quality, but their purifiers are more expensive. Your budget is a bit low for the two rooms. The [Coway Airmega 160](https://cowaymega.com/products/airmega-160) ($189.99) could cover the master room. It's more difficult to find just one unit for the large living room. The [Coway Airmega 400](https://cowaymega.com/products/airmega-400)'s CADRs appear to have changed recently, which now read as Dust: 328 CFM | Pollen: 400 CFM | Smoke 328 CFM. I don't know why these values changed. The unit is sold out on Coway's website and I don't know when it will be on sale again. [Sylvane.com](http://Sylvane.com) sells the Airmega 400 in White for $429.99. Alternatively, you could go for the [Winix C909](https://www.costco.com/winix-c909-4-stage-air-purifier-with-wi-fi-%2526-plasmawave-technology.product.100842491.html) at [Costco.com](http://Costco.com) ($199.99). This model has an on/off ionizer (do *not* use if you have pet birds). Its Smoke CADR is a bit low (323 CFM), but should be good for the other categories. Drawbacks: the Winix C909 is loud on the highest setting called "Turbo" (around 60 dBA) and the brand itself is more mid-grade. We've had some reports of whirring, whining, or clicking noises after the 2 year mark. This is usually an issue with motor bearings. If you don't mind a bit of assembly and an unconventional look for your living room, see the [AirFanta 3Pro](https://air-fanta.com/products/airfanta-3pro) ($159.99). It's a Corsi-Rosenthal design using Efficient Particulate Air (EPA) E11 filters. E11 is two filter classes below H13 HEPA. The CARB Edition's composite CADR is 413 CFM.

For most applications, Coway has the best build quality of the brands here. I should also mention Blueair, [which offers a 5 years warranty with registration for certain models](https://www.blueair.com/us/warranty.html). All Blueair purifiers utilize an always-on ionizer to electrostatically charge the filtration media. While I'm not quite certain on comparisons, Smart Air's Blast and Blast Mini air purifiers might be similar in quality or greater to Coway's higher-end Airmega purifiers. But those two Smart Air models are expensive. For the [Coway Airmega 300/300S, 400/400S, Icon/IconS\*, and ProX models, the warranty period is 5 years](https://cowaymega.com/pages/warranty-registration). \*We don't recommend the Icon or IconS models as they're poor value for money.

I have this one in my son's room and I'm happy too. I also have the 250, 300 and 400. I'm very satisfied with Conway. 

The Coway 400 smoke CADR is 285 and recommended for 442 sq ft with 8 ft ceiling based on 4.8 air changes per hour. They really inflate the room coverage. For dust you need a good HEPA filter and good air flow. Models with better performance at a lower price are BlueAir 211i, Oransi mod+ and. Levoit core 600s.

We use a [Coway Airmega 400](https://cowaymega.com/products/airmega-400?variant=33436457009287) for our grey. Tips: \- The unit you go with depends on the size of your room: Match the CFM to the room size (in order to get X amount of exchanges per hour). Most of them will have a CADR (clean air delivery rate). \- Ensure the replacement filter costs aren't insane and that they're easily available. \- Avoid any ionizing/active air cleaning technology. Use passive technologies like HEPA and charcoal for bird safety.

Coway all the way, 300's or 400's. I just ordered two 400's and I'm planning to order two 300's for the office and guest bedroom.

The Coway hasn’t helped remove any VOC for us. I purchased a 6” carbon filter from Terrabloom with 15 pounds of carbon, it seems to help with VOC but I’m no expert on VOCs.

1512 and 400. I love the both

nice! thanks for the citations! i was just about to order a new filter for my AirMega 400, and have a camelcamelcamel price alert for it. though $76 was a deal (down from $130 direct from Coway). but for $34, i'll try a Cabinclean filter.

Coway is top imo. i would rec getting at least two and putting them in different areas of your home. also, make sure you’ve got at least a MERV13 filter in your HVAC system.

whichever suits your use case, based on square footage. there maybe be small discrepancies between models, but i’m happy with my 400 model.

near a year with mine, parked a foot away from two litter boxes. no issues.

I have a Coway airmega 400 and it is one of my favorite purchases over the last few years. We have 2 large dogs, 2 x cats, 2 x 3 year olds and an older home that constantly felt dusty. I plopped this bad boy in my living room and my whole family noticed the difference in air quality. We are currently in the middle of a renovation and i use one in each of my kids bedrooms to keep the air clean. I vacuum the filter out every few days during construction and it is definitely pulling it's weight. It's auto/air sensing technology is what really blew me away. I'm not exaggerating if you rip a fart within 10' of this thing it will sense it and ramp up from blue mode to pink/red for a few seconds to clear the air. Very impressive machine.

I’d yank the Levoit units off this list unless cost is your biggest driver. While the Everest air is a good unit, the core is just not. It will clean air at first but it is cheap and the filter cost will add up over time. The lack of real pre-filters really kills these things. From your list, Medify is excellent. As is Coway 400. IQ Air will filter better than any of these units… but moves a lot less air doing so. I own one and I love it but I fully admit it lacks airflow and is VERY expensive. Alen is also good, you can optionally equip them with extra carbon which is nice. You won’t regret any of these purchases tbh.

Sigh. Listen, offhand all I know of is the Coway AirMega series 250/300/400. But seriously, please see other responses - you need to remediate the Asbestos.

There is no single air purifier that will provide the coverage you’re looking for, unfortunately. The Airmega 400 has a lot of oomph but it doesn’t really go around corners very well. No HEPA unit does. The exception is the carbon units because they’re removing gases.

I've got two "Coway Airmega 400" air filters and an older "Whirlpool Whispure Air Purifier". I really like the Coway Airmega 400. I've got one in my bedroom/office and another one in a large open area toward the center of my house. I've left both of them on high 24/7/365 for the past 4-6 years and they've been great; just need to remember to vacuum the pre-filters monthly (dust), and change the filters annually. The "smart" mode seems to work okay (haven't used that feature much to be honest), but I like leaving mine on high for the white noise and to help circulate air. The Coway Airmega 400 air filters go on sale somewhat regularly for \~$350 USD. I use [slickdeals](https://slickdeals.net/) to alert me when they (or their filters) go on sale. The average PM 2.5 in my house is .1; the vast majority of the time it's 0, but it'll spike during times of heavy air pollution, like during the 4th of July when everyone is lighting off fireworks, etc.

I don't know what "medical grade" filtration is even supposed to mean. For cigarette smoke and doors you need a HEPA filter that also has a lot of active carbon. That means pounds of action carbon not the thin filters you normally see. The only consumer filter I am aware of that has that is the Austin Air HealthMate. It's bigger, louder, and uses more power than some of the options you list, but it should make an actual dent in VOCs unlike many of the ones you listed. As for your list, the Coway is excellent, I have several - but it focuses on particulates (like all of the filters I recognize from your list) not VOCs and odors.

I think the Coway is going to do great if you are just trying to filter out particles. It's not crazy expensive, moves a lot of air, has good filtration, and doesn't use a lot of power. It's also very quiet on lower settings (which is where I leave mine most of the time). If you want to filter out VOCs, I don't know if any of these will work will. I have had good experiences with the Austin air filters for that. They are heavy, expensive, use a lot more power, and are a lot noisier. At the same time. They are much more capable filters when it comes to VOCs.

Levoit core 600s, coway airmega 300/400, medify ma125, dyson tp10, alen air breath smart, winix t810/5500. Any of these are great, so you can pick based off of design preference and location. Ones that intake from all sides work best in center of room, others are fine up against a wall. Dyson works well as a fan or circulator too. I also live in a larger open air loft style apartment with a cat. I have a Dyson in the upstairs bedroom for the fan feature, levoit 600s in kitchen for cooking because that thing moves alot of air at max, winix 5500 in bathroom and by litterbox because it is best bang for buck, having carbon pellets for odor at low price.

Coway and BlueAir are great. Make sure it says "True HEPA," unless you build a corsi-rosenthal box Levoit ones aren't always true hepa.

I have two Coway Airmegas and a Winix D4. I prefer the Coway. They all make a significant difference with the smoke.

I have a Conway Airmega for my chicken brooder (chickens create a ton of dust as they grow, and they have to be inside for a few weeks cause they don’t have feathers yet) and it really cuts down on the dust.

I have 1 Conway AirMega ($170 ea) in each room that runs on med 24/7 365. Prior to the air purifiers the kids n wife would always have allergies n congestion/cough for what seemed like year round. My wife would have to pop Benadryl till it knocked her out. Slowly I started putting the air purifiers in each room, vacuuming the pre filter every time we vacuum the floors and they’ve gotten so much better since then. It’s been several years at this point. They still have the allergy fits every once n a while but it’s a lot less frequent. It’s not the prettiest solution to have one in every room, but for us I think it’s been worth the ongoing expense as the filters aren’t particularly cheap ($34 for 2). I’ve done a few other things that probably helped too. I swapped out the 1 inch filter return registers for 4 inch returns. I get 4 inch merv 13s from AprilAire. And I also started vacuuming with a true hepa vacuum.

Used these for 3-4 years. Never broke. They do the job but a Conway airmega is significantly quieter and an handle a bigger space, also has air quality monitoring that is super helpful and can be set to automatically increase filtration if air quality is poor. That said Levoit remains an excellent choice if you’re on more of a budget.

I love my Coway AirMega! We’ve had it for a few years now and any time we have strong cooking smells or if I spray some hairspray, it kicks into gear and I can tell it’s working! Can’t speak to the longevity/BIFL just yet but I’ve been happy thus far and it seems like it’s great quality. I also buy their name brand filters. *EDIT: brand is “Coway” and phone auto corrected to “Conway”

Yep, we’re a 4 Coway household here too.

I’ve had Coway AirMegas, Winix, and Whirlpool Whispure, and Coway is by far the best home purifier in my opinion. I have an AirThings air quality monitor and a dust allergy, and these filters make a difference. You do need to clean the Coway prefilter regularly, but it’s easy to do. I didn’t know they sold off market filters so I’ll have to look into that because the filters can be costly.

I have 2 Coway airmegas that are super quiet that I’ve had for nearly 2 years. Do you change your filters regularly? Only one I would not recommend is Winix—I had one of the smaller models and its noise was very inconsistent and it was poorly constructed compared to the Coway Airmega and the Honeywell Whispure (a tiny model).

I have 3-4 Coway Airmegas and Winix 5500s. I found them all on my local Facebook Marketplace for $50-75 over the last 12 months. All in great condition. Previous owners sold because they were moving (college students; young professionals).

Buy the Coway air mega it usually goes on sale pretty often. 10/10

If I’d known about Austin Air when I bought my Coway Air Mega and Blue Air, I would’ve definitely picked Austin Air and I may still get one. It’s pricey, but so are Coway and Blue Air when you add up the cumulative price of filters. And, I find I need filter replacements much more often than recommended further increasing the cost.

Coway airmega it's excellent. I have mine going 24 hours a day and it senses everything. It also filters the tiniest particles.

The airmega. You can buy filters specifically for dust. There's 3 different types of filters i believe you can buy, the original and two more alternatives

This is the choice - had mine over a year and still going strong

We have two Coway Airmega units, one on either side of the house. They have been on 24/7 for several years now. Maintenance and cleaning are very minimal. Cost is about $150-200, although there are larger units based on how big of an area you need to filter. We are very happy with them! Whichever purifier you choose, I highly recommend you look into one with a replaceable HEPA filter. Other filtration methods just won’t give the same results.

Agreed! And they now offer different filters depending on what is most important to you to filter: one for smoke, one for allergens, etc.

This is the only correct answer. Don’t get air mega aim tho that’s a scam

Seconding. Got ours 2020 so can't really vouch for the longevity. We usually keep it on auto... though once in awhile we have to go turn it off when watching TV because it goes into overdrive for no apparent reason-- but this is fairly rare.

We have a 2500 sq ft home so we have several air purifiers. I went off wirecutter’s list and got Coway Airmega for the rooms with higher ceilings and Levoit for the kid rooms and office (where the litter box is). We have had them for a year and I’m happy with them. They’ve significantly cut down on daycare illness transmission within our household. Instead of all 4 of us getting sick it’s 1 kid and sometimes 1 parent per illness.

I have one. They are legit.

We also have the Coway Airmega. Have one on each floor. They work very well. However, we prefer the replacement filters no direct from Coway- read the reviews on Amazon, but the Coway ones had some issues with plastic smells/making air quality worse. Some type of defect.

Coway airmega gets my vote. Got 2 on amazon since pademic and they've been pretty good by far.

I have the Coway mega and a taotronics ap-003. I like the taotronics ap-003 more and it cost 85 usd.

I've got a Coway airmega in our bedroom, and a BlueAir in my office at work. I love both of them... I'm a therapist and work in an 8'x10' room talking to people for an hour 5-6 hours some days. I think the BlueAir is a big reason why I haven't picked up any of the respiratory stuff some clients have come in with (well, that + vaccines + mindful hand washing/sanitizing). It's also pretty quiet which is important to me. I'm planning on picking up another BlueAir or two for the rest of my house this spring. The pricepoint is kinder than my Coway, and it's much quieter.

Coway Airmega; which model depends on the size of the space. Make sure it has a charcoal filter.

This. I have a winix 5500, two blue air 411s and two coway airmegas and the coway is my favorite by far.

\+1 Coway Airmega.

I picked up a coway airmega during the Smokey season last year and let it run in the living room. It does a pretty good job of keeping the dust, cooking odor and old house smell to a minimum.

The sensors are amazing. The review on Amazon sold me " my dog farted and it instantly kicked on and I never smell them anymore" Yes whenever I cook or smoke they instantly kick on and work really well.

I really like the Levoit. It’s super quiet on the lowest setting and you can turn the lights off. My husband is a bozo who needs white noise to sleep so he always turns it up to its highest setting and then doesn’t turn the lights off. We have a coway airmega for our living area but I prefer the way the Levoit looks and my older son kept messing with the coway and it got stuck on a setting so I can’t turn it up or down. ETA I also have a roomba because I am allergic to dogs but my dog is my favorite child and I let him sleep on my bed during the day.

Air purifiers aren’t regulated so getting one that has undergone 3rd party testing is important in order to know they do what they claim they do. Coway Airmega does 3rd party testing. The ones that have an ozone setting have it as optional — something you have to turn on to use. We just never use it. Insane to me that they even have those. Yes, ozone is bad for people with asthma. Also bad for pets, especially birds. And probably people generally. I love that my coways automatically rev up in response to detected poor air quality. And they are whisper quiet when just in background mode. We only notice them when the go into high gear — usually when we are cooking. Edit to add: wirecutter still rates coway as a top purifier: https://www.nytimes.com/wirecutter/reviews/best-air-purifier/

I’ve had mine for over 6 years and they’re still going strong. I love them

Coway Airmega looks like a solid pick, especially as it’s clearing out musty smells and reducing allergens while adding that cool breeze feature. I’ve run a few models non-stop in rooms with high humidity, and once they started picking up those subtle odors, I knew I was onto something. I’ve tried some models from Blueair and Medify before, but ConsumerRating is what I ended up trusting because it lined up features like filter life and energy efficiency to my needs. Coway seems to hit that balance of performance and reliability, which is exactly what I’m after.

I have three too. They've run 24/7 for years without an issue. Third party filters work fine and are half the price.

I recommend the Coway Airmegas. To be effective, it will need to run at full blast. Get one with a high CADR or pick up multiples.

I vote for Coway Airmega. I have 3 of them and they’re great

I have 4 Coway AirMegas in my house they’re great

That’s what we have! My baby is also obsessed with it; not a day goes by that he doesn’t crawl up to it and start poking his little fingers into the holes on the front 😂

I love my coway airmega.

I have several Coway airmega and they are legit wonderful. They have an app so I can set programs for the speed, and report on air quality. I run these full time for years and they still are working great. Ive had several other brands but these are the best.

I tried a Dyson TP07 once, but it felt pricey for my budget, so I leaned toward Coway Airmega because it handles pet hair and dust pretty nicely.

I have a Coway Airmega at home, and it handles smoke and pet dander well without getting too loud.

I have two Coway Airmega that run like absolute champs and have very widely available and affordable filters

We're so happy with our 2 Coway Airmega for each bedroom.

Me too! I’ve tried the fancier copay’s but this one is the best for the money. Filters are reasonable and it has good power to circulate air. 

I love the Coway Airmega! I run it all day in the living room. Thinking about a small one fit the bedroom too.

First thing I want to say and it's important. The most important thing you need to know is that the air purifier has got to have true HEPA that is not an option ... 3m/filtrete is a joke of a purifier. They are terrible and do not last. biggest problem you have with their air purifiers are they are not sealed purifiers. There is a lot of dust that gets through other places and bypasses the filter in the unit and then what happens is it collects after the output vent so you will eventually start seeing dust there. Another is their filter cost. It's insane. if you look at their filter replacement schedule, it says the filter lasts 12 months used six hours a day.... air purifier are supposed to run 24/7 to have full effect so if you run it 24 seven that’s every three months their filters are also small... but I personally recommend and have used the past is these two for your size room are these I'll link. you get an air purifier that is going to be more powerful in your price range and will last for starters... There’s a reason why you want something with a higher CADR is because it will clean the air more frequently in that room and clean it better. You will get more air changes per hour basically and that’s a good thing. Also, you’re not gonna have dust getting past your filters and leaking out of the top of collecting everywhere else. You will also get a true 12 month filter when you run it 24/7. It comes with a TRUE HEPA and four replacement carbon filters. One of them will even include a additional year of filters if not both of them out of the box. The Coway Airmega is also another amazing air purifier for the price, however the filter costs have you replacing filters every 3 or 4 months with full use. Alen is also expensive from the get go but filters are annual. I have used these Winx purifiers in the past and I love them the plasmawave can be turned on or off I'd it's a concern but it doesn't produce ozone. I am just linking site so you can get all the information on them however I don’t know if you have a Costco membership or they still sell them or not but it was a great place to get these at an even cheaper price. https://www.winixamerica.com/product/c535/?_gl=1*1v4e0th*_up*MQ..&gclid=CjwKCAjwwLO_BhB2EiwAx2e-35mFNXJgc1BeCOGMGegBQ-An_KwmCD6L29mTNy-0yyIBkVrET2C_jhoC034QAvD_BwE https://www.winixamerica.com/product/c545/?_gl=1*u8q5cp*_up*MQ..&gclid=CjwKCAjwwLO_BhB2EiwAx2e-35mFNXJgc1BeCOGMGegBQ-An_KwmCD6L29mTNy-0yyIBkVrET2C_jhoC034QAvD_BwE

Coways are sold in europe but you need to find them on sale and that only happens once in a while, I was able to get my coway airmega for \~450 eur. Your other options are AEG (currently having lots of discounts) and winix. There is also rowenta, phillips & amazon basic, I personally don't like rowenta so I'd avoid it. If I was looking for a purifier, I'd try to get the AX9, has an insane CADR and costs around 330 eur right now.

I followed the Wirecutter recommendation and have a Coway Airmega. Two technically, one for our room and one for the baby's room. My allergies are a lot better after using them. My only gripe is that the first one we got makes a slight knocking noise sometimes, like it's just a bit out of balance. Usually if I turn it off, let it sit for a minute, and turn it back on again it goes away, but it absolutely drove me nuts when I was trying to sleep. I can't hear it over the white noise machine we use now though.

We've been happy with Coway airmega (one for kitchen, one for bedroom).

Wirecutter recommended the Coway Airmega. I got 2, one for the living room and one for the main bedroom. They have a sensor and cycle higher when there’s more particulates in the air. It has a prefilled and a main filter (that you change only once a year). It has an indicator light to tell you when to clean/change. Here’s the wirecutter piece: https://www.nytimes.com/wirecutter/reviews/best-air-purifier/

These. I raise pet pigeons (very very dusty) in my house and these are what I use.

so you need specifically, a HEPA filter - Austin Air makes a terrific one. So does Coway - the AirMega

For what its worth, NY Times Wirecutter blog tested a bunch and ranked the Coway Air Mega as the best option. I bought one and am happy with it. https://www.nytimes.com/wirecutter/reviews/best-air-purifier/

budget budget, build a corsi-rosenthal  otherwise, get a coway airmega. it's a little pricier than some but it has a carbon filter which is great for smells. prefilter catches a lot and saves wear and tear on the hepa panel

The Coway Airmega is really good. We have three of the larger model.

Is there enough ventilation overall? Opening windows in the winter will dry out the interior air but a fan or air purifier is just recirculating the air already in the room. I recently got an Inkbird CO2 sensor to see when it's getting stuffy. I did a DIY hack turning a 自然換気口 (passive air inlet vent) into a powered intake fan that has a PM filter. The models were basically the same size so it was an easy swap. Then I ran an extension cable to an outlet. For air purifiers I use Airmega Coway as the filters are robust. I don't use humidifiers due to condensation risk from poor construction (less of an issue in concrete mansion).

I've had a Coway airmega going 24/7 for six years that hasn't developed any noise problems

Second the coway airmega- we use it for our kid's room, but have it on a set setting (rather than the auto setting) because when it would turn on to max air purifier it gets pretty loud.

After pursuing BIFL I decided to pick one up as well. I have two kids with seasonal allergies and this thing has been amazing!!!

Second Coway.

Agree. Our Coway Airmega does a great job, and has an "economy auto" mode you can just leave it on all the time. And if you remove and brush pet hair off the prefilter once in a while, your filters should last a long time.

The Coway Mega is fantastic for dust, pet dander, woodsmoke. Had mine for a year now.

Coway Air Mega for the win! It’s big. It’s quiet on low speed. Did I say it’s big? It sucks a vacuum cleaners worth of crap out of my air every three or four months.

This one is kinda meh. Get a Coway Airmega instead

We have a Levoit Everest-air by our grey’s cage, and a couple of Coway Airmegas in each bedroom. I would say an air purifier is mandatory for your health if you own a dusty bird like a grey. Always turn off the ionizer (or get one without it A prefilter that is removable for cleaning is super handy. If you keep it washed (or vacuumed) your air filter lasts so much longer. It’s crazy the amount of dust that collects on the prefilters!

I’m a huge anti-viral illness and clean air mindful person and based on my research and cost, I’d recommend the Coway Airmega. The prices can be decent, sleek look, not too loud, and most importantly they have many articles out there recommending them for actually working.

I’m in the uk and got a Coway airmega and it’s great. Did my research and wouldn’t change it. If you reaaaaaaly want to go all in, there’s some guys on yt that build their own using PC fans but it’s a bit overkill

Coway room aipurifier is amazing. We have it in our bedroom. Though our area is quite clean it does remove dust and fungal odour during winters