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.

https://preview.redd.it/eg2z5elc25sf1.png?width=333&format=png&auto=webp&s=a0a52b370fe0c79399923b0d9eb4eefd01d71503 The screenshot shows the PM2.5 count in my balcony vs the PM 2.5 count in my living room with the air purifier on (Coway 400). When I turn the purifier off, the indoor reading goes back up to match the balcony level. So the purifier is clearly making a big difference.

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

1) Recirculating air purifiers don't need to be medical grade. CADR (Clean Air Delivery Rate) matters more. Example: An EPA E12 air purifier vs a HEPA H13 (True HEPA / medical grade filter) air purifier having the same CADR -> The EPA E12 is better. True HEPA is way too air restrictive and CADR already takes the filter efficiency into the equation which is why CADR > filter efficiency alone as it also accounts for the airflow within the filter. It doesn't mean that True HEPA is bad. It's just gonna usually be more noisy than an E12 for the same performance. More info on this here: [https://www.reddit.com/r/AirPurifiers/comments/1hne7sy/stop\_buying\_true\_hepa\_hepa\_h13\_air\_purifiers/?utm\_source=share&utm\_medium=web3x&utm\_name=web3xcss&utm\_term=1&utm\_content=share\_button](https://www.reddit.com/r/AirPurifiers/comments/1hne7sy/stop_buying_true_hepa_hepa_h13_air_purifiers/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button) 2) Air purifiers are better used in specific rooms. If you have 3 rooms then u need 3 air purifiers, one for each room. I need to know the room size in sqm/sqft and also if u have more than the normal 8ft/2.4-2.5m ceiling height. 3) You should buy a bigger air purifier than you need. The reason is since your family member has a health issue you 100% need the purifier to have AT LEAST the 4.8 ACH (Air Change per Hour), and since you might not want the air purifier to work at max speed all the time, you need to go at least 50% more if not double the power that you need. I generally recommend 50% more than what people need and let it run on low speed but in your case i recommend 2x more than what you need and run it on at least medium speed. 4) Good products that I recommend are either Philips PureProtect Series (3200 / pro 4200) or Coway Airmega 300/300s/400/400s. 5) Not related to air purifiers but look into fasting. Prolonged water fasting for at least 3 days, than refeeding with carnivore diet. Also the stem cell protection that a 3 days fast gives you on doing chemotherapy. There is more to it but here is a starter video : [https://www.youtube.com/watch?v=Wzmacu2TgFg](https://www.youtube.com/watch?v=Wzmacu2TgFg) Cancer works by feeding on the same feeding system as your body which is carbohydrates that you eat. If you switch off a carb rich diet and go carnivore diet you won't have any more external carbs (you ll feel like crap because of low glycogen stores but so will the cancer) so it will slow down the cancer's growth, since the cancer's main food source is your energy source which are the carbs. Moreover autophagy is your body natural system of getting rid of bad cells. It's a hunt for them. In a normal setting your body is just fighting bad cells. In autophagy mode your body hunts the bad cells to eat them as food. Guess what cancer is and what your body will do with it. There are plenty of cancer cases where autophagy helped. Do your research on it. Also your family member needs to have some fat/muscles to be able to do this and the refeeding needs to be aggressive to put back the lost fat and muscle during a fasting period. Salt is also required in the water but you'll learn about all of this if you do proper research. Not a medical advice since I don't know the specifics of your case but please look into it.

Yup, we splurged on a couple coway airmega 400 purifiers when we were living in Seattle and are glad we brought them with us to Minneapolis since we bought an older craftsman home without a duct AC system (which typically allow air filters). This past week would have been really rough for my asthma without air purifiers running!

Coway airmega 400 has been great for sure.

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.

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.

+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.

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.

On a 400? I only ask because it seems my 400 filters get dirty very fast. I keep the pre filter clean.

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!

This one hands down https://a.co/d/6vakT6u Coway 400 air mega 

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.

Oh all good, thanks for even taking the time to reply :) Yeah I ended up going for a Coway 400 over the Levoit core 600. What really pushed me even further towards the Coway was after buying the Levoit I realised the sealing of a purifier's filter really is something that I didn't consider. As someone with allergies the last thing I want is for dust to slip through the side of the filter and be thrown back out at me.

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 to change my air filters every 3 months max, due to the carbon aspect. I enjoy the machine overall.

I've had my 400 18 months. 1600 sq ft, and it gets the job done. The costs are significant, but the results are so worth it. At least until I find a more affordable solution to VOCs.

Buy it. You'll thank yourself later.

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.

Coway airmega 400. Get 2 and not the “s” model

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.

It's a good purifier and moves a lot of air. It's not the most energy efficient or cost effective large filter out there, though. Multiple smaller filters may cost less and perform better together due to better air mixing. I've also noticed that it winds up with less large or lint-type dust and hair, including cat hair, on the pre-filter than the multiple Coway 1512HH that we keep in other rooms and that we used to have in the same double room where the 400 is now. I think this is because of lower face velocity of the air, due to the 2x filter surface area (which on the plus side lowers resistance, increases energy efficiency and filter life, and decreases noise). And potentially also because it's higher off the floor. It may not be trapping all the heaviest particles, which would settle to the floor eventually in any case. It's a good idea to vacuum regularly because of that (and in any case). Some things to help you with your decision. If you do go with it, try to find a sale because they're often steeply discounted.

Also it's fairly attractive.

I am a fan of the Airmega 400

Wondering the same. Just got the 450 in the mail yesterday from the deal this week, but debating returning it for the 400 instead if there is good enough reason. My main two reasons are: 1. the 450 has a custom round filter, may be hard to replace long term and cost of filter has not been announced. Compared to 400 has pretty standard filter size. 2. Even though the 450 has higher CADR technically I think it might be because of the Turbo mode, which imo is not really usable as it can only be used when in turbo-only mode. So you might end up with higher CADR with the 400 anyways. But this part I'm trying to confirm. Edit: I just ordered the 400 as well and will return one of them, so will literally compare them side by side

Ended up keeping the 400 and returning the 450. I did take some sound and power readings from both at each speed so I might post those later this week

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?

Even though the MERV 1 filters suck, most apartments and homes try to use a MERV 8 or less to prevent airflow restriction which makes the AC system work harder. Unless you have health condition requirements needing the higher MERV. If you truly dont have a budget, then IQair would be good. Or Airpura, Allerair. Best bang for the buck to me is the Costco Winix C909 or Coway (only when on a good sale) Airmega 400. But you would still probably need 2 of the air purifiers to cover the apartment.

Thanks for the heads up! Already have a couple of 400 in my house but been thinking of getting a setup for my parents house. Thoughts on 4 x 400 vs 2x Pro X? Both meet the CADR needs.

I have three of these and love them. It actually changes modes instantaneously, it’s just that due to inertia the fan takes about twenty seconds to slow down on its own when changing speeds.

I picked up a Coway AirMega 400 and have no complaints. It's not very noisy on higher speeds and cleans the air well. There is no finite answer for dust other than regular dusting and vacuuming as well as removing as much carpeting as possible. My room is similar size and its been handling well. Not sure if any 4th of July sales are going to pop up but I got mine on sale for Memorial Day.

My apologies. I looked after I posted and I realized that its not a sitewide sale. If you've deemed the S model is a costly convenience, I'd probably return it and buy the 400 myself. That is a fairly decent deal for the 400.

I'm not an expert by any stretch of the imagination but I wanted to share a few things that may be helpful if you're in the market for one of these. I've realized that there are a lot of subjective thoughts when it comes to size, noise, etc. * Size: seeing it in the space, it does have a decent footprint but nothing terrible. It's in a spot that sees foot traffic and took the place of a plant which was getting bumped into more * Sound: I've been using it in auto mode. I don't know exactly how effective this is but in the lowest fan mode, it's very quiet to me. I'm about 6 feet from the unit and it was the high fan kicked on and it created less sound than an window air conditioner would * I have pretty bad allergies and in the 2 days I've been using it, I have noticed a slight difference in how much sneezing and blowing my nose I've been doing. It's in a room that is 180 sq. ft. with 9 foot ceilings (1,620 volume) and required 130 CFM. I opted for the higher performer because of my allergies and asthma * One thing that I noticed that isn't an issue for me is that there is a delay when changing fan speeds. Going from high speed to medium speed took 15-20 seconds for it to setting into medium. Likely a moot point but just another point that was noticeable to me Overall, I'd recommend this unit merely for the size of it and the fact that it really isn't that loud. Do you notice it on medium and high power? Yes. Is it a distraction? No. It took me a little while to get used to understanding where the noise was coming from. I only have to adjust the TV volume slightly when it kicks over to medium or high speed. I can live with it. Hope this helps as there are often questions about which unit to buy and decision paralysis.

Yes, that's correct about the fan speed. I wasn't pointing it out as a negative but the first time I switched speeds, I thought something was wrong. Thanks for the extra clarity as I feel it's helpful. I wanted to try another comparable model for a room that is slightly smaller than the current room its in as a comparison to see if one performed better than the other. After hearing how quiet this is, I may just skip the other manufacturer and go with another one of these or the next step down. I was surprised by how un-intrusive this has been noise wise.

As I mentioned above, thats a subjective question but in my opinion, and I consider myself fairly critical of how I mention things like this, it is not terribly loud. Will you hear it on medium and high speed? Yes. It only requires me to slightly adjust the volume on my TV. I was overall impressed with the sound levels to the point where I was considering another brand for another room and now I'm considering just getting another 400.

I was looking at the 45i as well for a bedroom but if I went with Alen, I was going to get the 75i for more purification. I have pretty bad allergies year round as well as asthma. From reading around here and in case you don't know, air purifiers do not work around corners or through closed doors. As long as your spaces are open and unobstructed, you should not have an issue. The other good advice I received was getting something that provides more purification than just what is needed. This way you can run the machines on lower power but still get your air purified the way you need it. Don't forget to calculate your ceiling height as well. Hope this helps.

I ended up with a Coway Airmega 400. This a calculation tool linked somewhere on this page which requires your room length, width and height. It gives you the CADR's number or volume your air purifier would need in order to change the air over in said room and purify it properly. What I took from my research, going bigger can't really hurt you. The tradeoffs will likely be noise levels and potentially energy use increases. When you look at specs for the air purifier, some sites list the effectiveness of the machine based on certain particulates. It's important to note that most of the effectiveness numbers are based on the purifier at its top speed/power setting which will most likely create more noise. Larger air purifiers at lower speeds can clean the air as effectively as smaller purifiers at high speed hence I went with the slightly larger air purifier for my space. I liked mine so much I picked up a 2nd one for my bedroom.

Which is low speed. Which sucks. 

It’s not that loud, only on the lowest setting…. Otherwise, it’s so loud, I use it as a white noise machine, in the other room, on the otherwise of my house from where I sleep! 

It's loud but its not annoyingly loud. At its highest, the motor noise will be like a "bass" sound, so its pitch makes everything more bearable.

Coway 400 has been great for us!

You can go from 2 to 1 directly.

Press the strip at the point where the single fan speed icon is. Basically press the strip where the lighted fan icon is in this picture: https://images.app.goo.gl/VZnxoqoWv1d4vCQn7

Could you let us know what country you are in, and how big the volumes of the spaces you want HEPA filtration for? The Coway Airmega 400 is an excellent unit with coverage of about 1,000sq feet, but at about CAD$850 each, they are quite spendy. I'd recommend going with multiple units of the Airmega AP-1512HH instead. They are about CAD$207 each on sale at [amazon.ca](http://amazon.ca) currently, and two units in each room would be about your budget. When you have company over they are also lightweight enough to move into the living room, vs the Airmega 400 which is bigger and bulkier. Several units closer to the source of the contaminants (and you) is more effective than one larger unit trying to filter the same volume of space. My setup since the start of the pandemic has been (about 3600 sqare feet over three stories + basement here in Toronto, with a moderately leaky building envelope): \- 3X Coway Airmega 400 on the main floor living room, dining room, and kitchen \- Airmega AP-1512HH in each bedroom and the study \- Whole house Airpura UV-600(HEPA filter, carbon filter for Volatile Organic Compounds(VOCs), and a UV sterilizing lamp) connected in bypass mode to the central HVAC system \- Multiple PM2.5 meters throughout the house to measure PM levels in individual rooms (This one from AliExpress.com: https://www.aliexpress.com/item/1005009490037893.html ) It measures not just PM2.5, but also PM 1.0 and PM 10. The actual sensor is the Plantower PMS5003 particulate matter sensor which uses laser scattering measurement for greater precision than NDIR(Non-Dispersive InfraRed) sensors. This enables you to see the actual air quality in real time, and adjust fan speed and unit placement for optimal air quality. With this setup I can get the PM1.0/2.5/10 levels down to 0 ug/m3, even in the toxic soup that is Toronto's current air quality with the wildfires in Manitoba. You could start out with two of the Airmega AP-1512HH units, and the particulate matter meter and see how effective they are before buying additional units if needed. It's also important to factor the ongoing cost of filter replacement into your purchasing decisions.

Austin Air is overpriced, and sounds like a jet aircraft taking off. For contrast, look at the Coway Airmega 400, or the Airmega400S (for "Smart") if you want detailed sensor readings/remote operation. For that size room, you could even start with the Coway AP-1512HH and then add a second unit if the one wasn't enough.

Directly from Austin Air Canada, the CADR(Clean Air Delivery Rates) and decibel levels, both of which they don't tell you on their site, last time I checked: "The CFM by speed is: High 250, Medium 125, Low 47 Decibel levels by speed are: High 62, Medium 52, Low below 50 If you need further assistance, please reach out to Austin Air Canada at 888-236-9525 or [email protected]" Compare that to the Coway Airmega 400, which (from elsewhere on reddit and other sources) tops out at 52dB on high. Decibels are a logarithmic scale, so the 62dB of the Austin Air is **ten times** as loud as 52dB from the Coway 400. The CADR of the Coway Airmega 400 is 400cfm for pollen (source: US Gov EnergyStar program: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwjXuOu49pCGAxXOhf0HHTIRAYgQFnoECCgQAQ&url=https%3A%2F%2Fwww.energystar.gov%2Fsites%2Fdefault%2Ffiles%2FRoom%2520Air%2520Cleaner%2520Draft%25201%2520Version%25202.0%2520Data%2520and%2520Analysis_0.xlsx&usg=AOvVaw0G-z9wF5ZtF2Gu3KSm1rqA&opi=89978449 ) So, if you want a HEPA filter that is 10 times louder, 40% less efficient, and more than twice the price, then buy the Austin Air, otherwise Coway or pretty much any other HEPA filter is a better bet than the Austin Air. My daughter's school was forced to buy them, and on high they make even ordinary conversation impossible, let alone teaching. Hot. Garbage. Look at Airpura if you want a truly BIFL whole-house option.

I have this model and it worked okay for a few months then indicated I have to change the filter. I have ordered replacement filters from Amazon and directly from coway website and both have a digesting strong chemical smell that doesn’t go away even after running the machine for a few hours. I called coway support and her only suggestion was to run the filter on high outside for 3-4 days. I live in an apartment building, how does she expect me to air out this filter? Do I have to find someplace to live for a few days? Did not expect such unreliable low quality replacement filters (for $130 no less) and customer service. The air purifier is now unusable since I can’t replace the filter.

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.

Considering your budget of $600 total, I'd bump it up a bit for the Smart Air Blast Mini. It has a 6lb activated carbon filter. It's a heavy unit but it will get the job done. https://housefresh.com/air-purifier-for-vocs/ Another option is the Coway Airmega 400. You'll only need one. The Coway Airmega is no match for VOCs. It can't even filter out the smell of weed. I have one and it's fine for a basic air purifier but odor reduction let alone VOC reduction is not something it's capable of.

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

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.

Hey! i recently spent the better half of a week scouring the interent for what i beelived to be a really quality air purifier but at a cost effective price. It really deepnds on your budget. I would say around $600 i would suggest the better Coway models or the air oasis personal. for around $1000 id suggest the austinn air units with all that activated charcoal or some higher end from IQ air. Above that i beleive youd be better to have medical grade purification system installed with your HVAC system, for several grand. I trecently bought a cheaper aproxx $300 unit, the \*coway 240\* , and think its the absolute best air purifier for under $400, however the coway 400 is astep up( and probably worth the extra hundreds if youre purifying a large living quarters. It can often be found at a discounted price(under around 400, a good deal) ive heard. I went with coway240 for size and im only purifying my bedroom. i wouldnt go ANY cheaper than the coway 400 or 240 models and think they are the most cost effective but very reliably proven purifiers. IF you MUST go lower id look into wynix.... thats it. anyways, I have no complaints about the coway 240 and i have notice iit battle a little smell(remember you need a decent amount of charcoal to absorb substantial amount of smell, if youre really looking for smell reduction the autin air unit are probably best, tons of activated charcoal) Im completely new to air purifier too! but there thats my novice two cents, also i DEFINITELY suggest consulting the "buying guide" here in this reddit, very useful.

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).

This is why we have **Rule 7: No AI-Generated content**. ChatGPT is frequently wrong. Purifiers can't overcome walls and doors. So unless the 1,000 sq. ft. is an open space, you need at least one unit per room or area. Jafända isn't a recommended brand. And their JF260 model has a top Clean Air Delivery Rate (CADR) of 153 CFM, which is way too low for an open 1,000 sq. ft. space. Do you have a ducted range hood/cooker hood in the kitchen? This is the best option for handling cooking pollutants, which can be oily & deposit grease. [Per AHAM](https://ahamverifide.org/ahams-air-filtration-standards/), CADRs should be *at minimum* 2/3 of a room's area assuming an 8 ft. ceiling. For a 270 sq. ft. room, this would mean at least 180 CFM CADRs. But if someone has allergies or sensitivities, CADRs ought to be higher. Another factor will be sound levels. [According to a *Pediatrics* article](https://doi.org/10.1542/peds.2013-3617), the recommended noise limit in USA hospital nurseries is <50 dBA. So you may need to "oversize" a purifier to run it at a lower, quieter speed while maintaining good air cleaning. We generally recommend Coway first as it's a higher quality brand. You didn't mention overall budget (see **Rule 4**), but a good oversized choice for the baby's room would be the [Coway Airmega 400](https://cowaymega.com/products/airmega-400). The second highest speed/fan setting should still give you plenty of CADRs. We'd still need the length x width x height of the living room/kitchen area.

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.

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.

Are you looking to move one purifier between your bedroom and living room? I would *not* recommend Airpura or AllerAir unless you have a serious gas/vapor/odor/VOCs issue that can't be mitigated with source control or ventilation. In that case, you'd choose one of their heavyweight carbon purifiers. Airpura and AllerAir do make more particulates-focused units, but they don't list particulate Clean Air Delivery Rates (CADRs). They're also known for be very loud. Both are Canadian companies that manufacture largely in Canada and some components in the USA. Levoit is lower quality than IQAir and Coway. The [IQAir Atem X](https://www.iqair.com/us/products/air-purifiers/atem-x) you linked in a comment is high quality and has CADRs in the 400s CFM, but it's very expensive per CADR. As for "True" HEPA, I would say that listing the standard and filtration efficiency at Most Penetrating Particle Size (MPPS) gives you the best idea of performance. There are several HEPA standards. But I don't think there's a significant difference between brands on this front; they will still clean your air. The [Coway Airmega AP-1512HH Mighty](https://cowaymega.com/products/mighty-ap-1512hh) you linked is commonly recommended. It's a good price point and attainable for many. But the Mighty has a few drawbacks like being less energy efficient, somewhat loud, and occasionally people have reported balance issues (e.g., purifier "walking" across a floor). The [Coway Airmega 400](https://cowaymega.com/products/airmega-400) was probably recommended in part because it's "oversized" for your bedroom. Oversizing allows you to run the unit on a quieter setting while hopefully maintaining CADRs. ➡️ If you're expecting one purifier to clean both the living room and bedroom areas, I would also recommend the Coway Airmega 400. The highly upgraded pick would be the [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox). Top Smoke CADR is 568 CFM. It has wheels so you can move it around easily and it shows PM10, PM2.5, and PM1.0 concentrations. Obviously the ProX is fairly big. Keep in mind that CADRs apply to the highest airflow speed/setting *only*. Lower settings have lower CADRs, which reduces cleaning effectiveness. Right now there aren't any fantastic sales directly from Coway. But you can use the discount codes **COWAYMEGA10** or **FORYOU10** for 10% off most items.

Not sure where you're seeing the [Coway Airmega 400](https://cowaymega.com/products/airmega-400) CADRs, but I included the Coway product page link in my last comment and now this one. As taken from that page, CADRs are: * Dust: 328 CFM * Pollen: 400 CFM * Smoke: 328 CFM The [Airmega AP-1512HH Mighty](https://cowaymega.com/products/mighty-ap-1512hh) uses the "Vital Ionizer", a bipolar ion generator. Turning it off may affect one or more particulate type CADRs. And if the highest setting is too loud, you'd have to use a lower one... the second highest one would probably give you adequate CADRs. If you didn't want to spend that much on the Airmega 400, you could also consider the [Coway Airmega 240](https://cowaymega.com/products/airmega-240) for your bedroom \[240 is sold out at Coway currently, but still [available from Sylvane.com](https://www.sylvane.com/products/coway-airmega-240-hepa-air-purifier)\*\]. There's a discount code at the moment for Sylvane that gives random discounts - **SPOOKY**. As for third party filters, it's a gamble in terms of like-for-like performance. They may void your warranty. I don't know anything about Cabiclean filters.

...different websites display different levels of expertise or due diligence? There are traditional and online media websites "reviewing" purifiers whose methodologies, criteria, or testing will vary. Many product review articles authors are journalists, not HVAC or air quality engineers. And the underlying goal of some websites may be to drive viewers towards referral or affiliate URLs to make money. You have to compare apples to apples. RTings.com has tested only 2 Coway models and 2 Winix models. There are no Smart Air, IQAir, Alen, or Medify Air units. I'm looking forward to RTings.com testing more purifier models. But right now, the test selection isn't impressive... there are a lot of Dyson purifiers. As stated on one of your other posts, we generally like Coway for the build quality, performance, and quiet operation. The ProX, 400S, 400, 300S, 300, IconS\*, and Icon\* come with a 5 years warranty. All other Airmega models have a 3 years warranty. Link: [https://cowaymega.com/pages/warranty-registration](https://cowaymega.com/pages/warranty-registration) \*We do not recommend the Icon / IconS, as they have poor CADRs for the money. The Levoit EverestAir is the best purifier Levoit makes with lots of extra features. Some of the CADRs are a bit low (373 CFM for Dust and 354 CFM for Smoke). Top sound level according to HouseFresh is 57.8 dB; note this isn't an A-weighted decibel rating. Warranty period is 2 years. Don't know how the EverestAir's build quality compares to Coway's higher end offerings.

First, air purifiers aren't very good at reducing visible dust. It's comparatively large and heavy. You can capture more visible dust by oversizing a purifier. If you have high pollution levels, it's recommended to oversize a purifier. I don't know how much you want to pay for a purifier and its filters. That's why we ask for a budget. You're requesting "the best". Quality and cleaning capacity aren't cheap. For the 12' x 20' room, the [Coway Airmega 400](https://cowaymega.com/products/airmega-400) should fit hopefully. The [Airmega 400 Max2 Filter Set](https://cowaymega.com/products/airmega-400-max2-filter-set?variant=33436452323463) is $129 at most, but can be bought for $83 on Amazon. This purifier is for **particulates** (dust, dander, mold spores). However, this model is *not* good for odors. Odors are gases. If you want something cheaper for **particulates only**, have a look at the [Winix C909](https://www.costco.com/winix-c909-4-stage-air-purifier-with-wi-fi-%2526-plasmawave-technology.product.100842491.html) sold at Costco.com. You can buy [replacement filters at The Home Depot ($27.99)](https://www.homedepot.com/p/Winix-True-HEPA-4-Filter-Activated-Carbon-Replacement-Filter-A-115115/202034412). Keep the PlasmaWave function turned off. Like I said before, the AllerAir you linked will NOT be good for particulates. AllerAir is for **gases/vapors/odors**. Replacement carbon canisters will be expensive: anywhere from $219 to $336. That is just the nature of high weight activated carbon purifiers. This is why I said you need two different purifiers: one for particulates and one for gases/vapors/odors.

The Coway Airmega 400 (and all other current Coway models) have very little activated carbon by weight. You need pounds of activated carbon for long-term or higher levels of gases. To boot, certain gases require modified activated carbon to increase removal efficiencies. It can be tricky to get the right carbon type or blend. Winix's PlasmaWave is safe for humans. Models with this feature are certified to produce very low levels of ozone. However, certain small animals may be more vulnerable to smaller ozone increases (usually birds). I saw you had reptiles, so I recommended keeping it off to be cautious. It's very difficult to say on the AllerAir, as many factors are involved. See this FAQs wiki page entry: [https://www.reddit.com/r/AirPurifiers/wiki/index/faqs/#wiki\_when\_should\_i\_change\_my\_activated\_carbon\_or\_other\_sorbent\_media\_filter.3F](https://www.reddit.com/r/AirPurifiers/wiki/index/faqs/#wiki_when_should_i_change_my_activated_carbon_or_other_sorbent_media_filter.3F)

I noticed you said your ceiling measurements aren't actually 12 ft. But to address your original scenario: >Did I do my math correctly in seeing that my max CFM requirements are 175 CFM's? Not quite. It would vary by room, but I'll use just one example. *Minimum* (not maximum) CADRs for the living room would be calculated the following way for [AHAM's 2/3 rule](https://ahamverifide.org/ahams-air-filtration-standards/). 2,160 cubic ft. ÷ 8 ft. = 270 sq. ft. as the "adjusted" purifier coverage rating. Then, 270 sq. ft. ÷ 1.5 = 180 CFM. Minimum CADRs for the living room would be 180 CFM. However, we generally recommend higher CADRs if you have allergies or asthma to reduce the severity or onset of symptoms. And since you want to run purifiers at a lower speed anyhow, oversizing would definitely be recommended. Unfortunately many brands do not list CADRs for airflow speeds/settings other than the highest one. Lower speeds have lower CADRs of course. ➡️ I would definitely recommend the [**Coway Airmega 240**](https://cowaymega.com/products/airmega-240) instead of the Airmega 250. The Airmega 240 is quieter, cheaper, more energy efficient, and has higher CADRs. If you really wanted to oversize, I would recommend the [Coway Airmega 400](https://cowaymega.com/products/airmega-400). The top-of-the-line and very quiet [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox) is a fantastic price (in Mocha Beige only) right now, but it would be very big. If you want to calculate energy costs, use this [U.S. DOE Appliance Energy Calculator](https://www.energy.gov/energysaver/estimating-appliance-and-home-electronic-energy-use). Unfortunately most Coway purifiers aren't discounted right now. But sale prices pop up very frequently. Check back daily. Additionally, you can also utilize discount codes like **FORYOU10** or **COWAYMEGA10** for 10% off even on discounted models (most of the time).

Most common air purifier brands do not have very much activated carbon or another sorbent media by weight for gases, vapors, or odors (including VOCs). Therefore the activated carbon could become saturated way faster than the HEPA filter. Do you have elevated concentrations of VOCs? If you wanted to know the gaseous species present, you'd need air testing with Gas Chromatography-Mass Spectrometry (GC-MS) analysis. Even then, I would definitely focus on source control and ventilation (e.g., installing and configuring a Energy Recovery Ventilator or Heat Recovery Ventilator) first. This is because heavyweight sorbent media purifiers are very expensive, very loud, and clean the air more slowly than particulates-focused air purifiers due to the need for ["dwell time"/"residence time"](https://www.airscience.com/carbon-filters). Example brands are Airpura and AllerAir. Another issue is that plain/chemically untreated sorbent media do not have high removal capacities for all gaseous species. We've had reports of odors emanating from activated carbon (sometimes "sweet" smelling, which could be not-well-adsorbed acetaldehyde) or spikes on tVOC monitors despite a reduction in odors. **Particulates Purifier** NB: unfortunately air purifiers aren't good at reducing *visible* dust. It's large and heavy in comparison to "invisible" pollutants like PM10, PM2.5, and PM0.1. Therefore it tends to fall and settle on surfaces unless very close to a purifier's intake. Additionally, see the [sticky post at the top of this subreddit](https://www.reddit.com/r/AirPurifiers/comments/1jxgjwf/sticky_purifiers_and_dust_reduction/). You'll need to consider sound levels too. This is covered under the header ["Regarding Infants and Young Children"](https://www.reddit.com/r/AirPurifiers/wiki/index/how_to_choose_an_air_purifier_for_particulates/#wiki_regarding_infants_and_young_children) in our "How To Choose An Air Purifier for Particulates \[Comprehensive Guide\]". I would tend to recommend the [Coway Airmega 400](https://cowaymega.ca/products/airmega-400). You can run it on the second-highest airflow speed which should still give you very good CADRs. If you buy directly from Coway, use the discount code **COWAYMEGA10** for an additional 10% off. This should bring the cost down to $530.15 CAD.

While there are salient points about air pollution and indoor air quality, Jaspr is not good considering the price: $1,199 USD for Clean Air Delivery Rates (CADRs) in the mid-300s CFM. By comparison, you can get a [Coway Airmega 400](https://cowaymega.com/products/airmega-400) with CADRs from 328 CFM - 400 CFM for $366 USD currently. [I went back and forth with the founder about their spurious claims](https://www.reddit.com/r/AirPurifiers/comments/1gspgqd/comment/lxg2uxz/) (warning: very long). He used to run a marketing company which explains Jaspr's propensity for slanting the truth.

No, one [Winix C610](https://www.winixamerica.com/product/c610/) wouldn't be enough. The [Winix 5510](https://www.winixamerica.com/product/5510/) would be underpowered too. I would base my choice off of Clean Air Delivery Rates (CADRs), not Air Changes per Hour (ACH). See the AutoModerator comment about the [AHAM 2/3 rule](https://ahamverifide.org/ahams-air-filtration-standards/). For an open 500 sq. ft. space, *minimum* Clean Air Delivery Rates (CADRs) should be **334 CFM**. This assumes the ceiling height is 8 feet. The Winix C610 has CADRs of: * Dust: 252 CFM * Pollen: 262 CFM * Tobacco Smoke: 248 CFM If you want a conventional HEPA purifier, it's going to be hard to find one unit that isn't very expensive and large. A model that is slightly short on dust and smoke CADRs is the [Coway Airmega 400](https://cowaymega.com/products/airmega-400). (The [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox) exceeds min. CADRs, but it's large and very expensive.) The [Alen BreatheSmart 75i product page](https://alen.com/products/alen-breathesmart-75i-air-purifier?variant=13172054491203) claims an averaged (?) CADR of 375 CFM with a big price tag of $799. This is probably using the "Pure" Allergen Collector filter. [Energy Star says the BreatheSmart 75i (version 2.0)](https://www.energystar.gov/productfinder/product/certified-room-air-cleaners/details/3417462) has CADRs of: * Dust: 351 CFM * Pollen: 431 CFM\* * Smoke: 370 CFM \*Likely with the ionizer turned on. Turning the ionizer off will probably decrease Pollen CADR. Alternatively, you can buy multiple smaller purifiers whose combined CADRs meet or exceed the minimum 334 CFM values. Just remember that CADRs for purifiers are for the highest airflow speed/setting only. Lower settings have lower CADRs.

So the issue is that most common purifier brands have little sorbent media (such as activated carbon) for odors. This includes Coway, Levoit, Winix, Medify Air, Smart Air, Honeywell, Blueair, etc. Instead, they are designed to capture particulates. Musty and old odors may be caused by high relative humidity (RH) and/or high carbon dioxide levels. For high RH, you need a dehumidifier. For CO₂ levels, you need "fresh" (oxygenated) air ventilation. This can be achieved via open windows or installing an Energy Recovery Ventilator (ERV) / Heat Recovery Ventilator (HRV). It's important to control relative humidity for reasons beyond mold prevention. With a heavyweight sorbent media purifier, certain sorbents can adsorb water vapor from the air. This would likely shorten the filter's working life. As for a purifier that captures particulates for allergies, it really depends on your budget. Oversizing allows you to run a purifier at a lower airflow speed while maintaining CADRs. The issue is that vast majority of brands list CADRs only for the highest airflow speed/setting. **Particulates Purifiers:** I would tend to recommend the [Coway Airmega 400](https://cowaymega.com/products/airmega-400). Unfortunately the sale price ($366) ended for this model yesterday and it's back up to its full price of $649. If you can hold out, you may want to wait for another sale. [Amazon is cheaper right now for the Airmega 400 in Graphite ($399)](https://www.amazon.com/Coway-Airmega-Purifier-sq-ft-White/dp/B0722YZ1R1/?th=1). You could also opt for two purifiers, such as two [Coway Airmega 240](https://cowaymega.com/products/airmega-240) units. And if you want to order directly from Coway, use the discount codes **COWAYMEGA 10** or **FORYOU10** for 10% off. **Gases/Vapors/Odors:** Heavyweight sorbent media purifiers are very loud, very expensive, and clean the air more slowly than particulates-focused air purifiers due to the need for "dwell time"/"residence time" + thick media beds. Example brands are Airpura and AllerAir. A more entry-level unit from AllerAir would be around $600. To boot, most Airpura and AllerAir standard activated carbon options are plain/chemically untreated. Plain/chemically untreated carbon and other sorbents do not have high removal capacities for all gaseous "species". Some people report "sweet" odors emanating from the carbon beds, which may be the not-well-adsorbed acetaldehyde. Other times there are spikes on tVOC monitors despite a reduction in odors. In order to increase removal efficiencies, you need to impregnate activated carbon or another sorbent, usually called impregnation or wet-mixing. Potassium permanganate (KMnO₄) appears to be a more common impregnant. It operates in part by breaking down certain gases via redox reactions. Problematic byproducts may be generated depending on your air chemistry, although this is usually more of a concern in totally unknown/high complex air chemistries. KMnO₄ also has a tendency to off gas as it saturates or loses efficacy. If you want to experiment with something cheaper, you could have a look at the [Oransi TrueCarbon 150C](https://oransi.com/products/truecarbon-150c-air-purifier). It uses 3.2 lbs. of KMnO₄ impregnated activated carbon. Keep in mind this isn't very much of a sorbent medium by weight.

I've got 2 of them.. worth every penny!

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.

On low it’s silent. On high it’s noticeable but not insane.

Yep and they make a programmable version of this one so I have to set to turn on full blast when no one is around (night, at work) and then down before I get up or come home so half the time it’s cleaning like crazy and then it’s quiet when I’m there.

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.

I had a smell for a few hours after turning mine on. Just ran it with the window open in my bedroom for a few hours and the smell was gone.

Don’t overthink it. So your room is 15 m2, so 161 sq feet in North American right? I personally use Coway so I can only reccomend them from my experience. I have a Coway Airmega AP1512 for my 150 sq foot bedroom and a Coway Airmega 400 for my 600 sq foot main living space (kitchen, den, dining room) I’d highly reccomend the AP1512 for your small space. https://www.nytimes.com/wirecutter/reviews/coway-ap-1512hh-mighty-air-purifier-review/ With that being said, I’m sure the Winix is a great unit too!

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.

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.

an air purifier is literally removing “waste” from the air. asking for it too be “zero waste” is wishful thinking. like with vacuums, a bagless system will never clean as well. i’ve been real happy with my Coway 400, still on its original filler nearly a year into use. and it sits right beside our cat litter boxes! it has a “pre-filter,” which catches larger particles and extends the life of the HEPA filter. the pre-filter is easily cleaned by blowing it out / rinsing it.

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.

Coway models from 250 upwards (250/300/400) have child lock. I don't recommend the 350/450 because they are round, but the others should suit your needs.

Clean Air Kits isn’t HEPA. Does that matter? Maybe or maybe not. But it’s very specifically NOT HEPA. That said, most of Coway’s lineup has no ionizer. The 250/300/400 are excellent machines. (Avoid 350 and 450 as they are round…)

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.

They are just fans - just replace with new filters. Another good option when I researched this were the bigger Airmega models (300 or 400)

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 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.

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

I got a Coway Airmega because it was highly reviewed on the Wirecutter website after my previous Levoit broke after only a couple years and wasn’t fixable (circuit board inside was fried).

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

I have the Coway Airmega and an Austin bedroom machine, and they seem to be equally good. The Austin cost significantly more.

Anecdotally, I have two big Airmegas running in fairly small spaces and I can't tell a difference in air quality between when they've been running and when they haven't. I don't get what the point is.

I have a coway airmega in the middle of a ~1k sq ft apartment. It frequently turns on a higher cycle after we cook on the gas stove down the hall

I have the Coway and had it for the last coupe of years B it I recently switched to the blueair purifier and am very happy. They also happen to look good.

The airmega. The number one pick from wirecutter for years now.

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.

The Coway airmega is the best overall imo

I have one. They are legit.

I just recently bought 2 coway airmegas. No smell at all.

huge fan of Coway Airmega. filters last a long time, it has a mesh prescreen you take out and clean every 3 weeks or so, and it's both quiet and has a good CADR. And it's very slim and doesn't take up much space!

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

Another vote for Coway Airmega. I’ve had several since 2020 and still going strong.

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.

I would also say my Coway Airmega is one of the best investments I have ever made. It’s amazing how much it can grab and filter out. They say the filters should last a year, but we have it constantly running in a larger room and probably change the filters every 3-6 months. Closer to 3 when we have the AC wall unit on blast thru the summer. We’ve also had terrible Smokey days from the Canadian wildfires in my area and when I last replaced my filter, it was almost black so it was working hard! 2 years of having it and no issues.

Id say no, proprietary airfilter. I use [https://cowaymega.com/products](https://cowaymega.com/products) and get 3rd party filters to replace it. I also turned it into a fan by using plastic vacuum hose.

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

Been running coway airmega 24/7 since 2018. Replace the filter every year and bob's your uncle. 

Can't hear it if you set it to low. 

\+1 Coway Airmega.

Coway has a better reputation than the models Costco carries. Love our Air Mega. Bought directly from Coway at a steep discount. Just have to wait for sales.

Thirding this one!! Our are great

Swear by Coway Airmega - liked it so much I bought another one - personally Iove their aesthetic as well but I consider them better than previous levoits and Winix - wait for a special offer is my advice 

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.

Second the coway. They are worth the price. Given OP's budget, looking on ebay or facebook marketplace for a used one might be a good first step. Buy new filters for it if you get it used.

Can highly recommend Coway Airmega. We have 3 of them for the same reason. We've had them for a few years and regularly replace the filters, so haven't done recent research to see if there's anything better out there.

As someone moderately allergic to cats and SUPER allergic to dust. I'm allergic to most people's cats because they are silly lil guys who love to find tiny spaces that are hard for humans to dust well. We have two Coway Airmega air purifiers to help minimize dust buildup and deep vacuum regularly with a big kid vacuum to manage dust and floof. The Purina Live Clear allergy reducing cat food 100% works. We have a friend who is allergic to cats (like myself) she had minimal symptoms while at our home for hours. She hadn't taken any allergy meds that day. I still take a Zyrtec every night and generally experience little to no symptoms despite my void floof believing she is a feather duster and rolling on the floor.

Like others, I swear by the Coway Airmega, but that’s just brand/model loyalty. You’ll want you check each model’s CADR score - the higher the number, the faster the unit filters the air. Decide what your ideal budget is, and find the unit with the highest CADR at that price point.

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.

I've been using a Coway Airmega for 3 years now. No complaints besides I don't like the look as much as I thought I would. Keep it in my bedroom because that's where I spend the most consecutive time and also it's not far from an HVAC intake. Having 1 was a bit undersized for my house so at first it seemed to run on medium and high more often (I almost always keep it on Auto). When the pre-filter gets clogged you'll notice it will randomly run on high. Easy to clean and change filters. I've been buying the filters from a 3rd party.

I did tons of research and also got the Coway, been very happy with it!

I have a Coway Airmega and it changed everything for me. My budget was only $200 and you can buy it for less than that easily. Dust, pollen, pet allergies, and cooking fumes are all big problems in my near-century home. I ordered replacement filters from Amazon. I do move it from room to room if I am doing a big project or cooking something which will smoke (no built-in hood). I keep it in my sleeping room the rest of the time. For something inexpensive I have been tremendously happy. If I had a budget of $500, I’d just buy more of these! It definitely cleans cooking odors/smoke no matter what room of my house it’s in, but I like to clear the kitchen air quickly for my own sake.

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.

Definitely the Coway Airmega. It’s sleek, portable and relatively quiet compared to some of the alternatives. You can find some good options [in this thread](https://www.reddit.com/r/productbible/comments/1lj3367/the_best_air_purifiers/)

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

Absolutely necessary these days. I bought a Coway airmega last year because of the terrible dust from the incessant roadwork. There's a noticeable difference and most importantly, my daughter sleeps better. No regrets

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

The Coway airmega is the best imo. You can find some good options [in this thread](https://www.reddit.com/user/Unable-Treacle-9384/comments/1n9p2ve/the_best_air_purifiers/)

I own a Coway Airmega, BlueAir 311 Auto, and a Dyson PureCool. Coway is for the main living room/kitchen, BlueAir for kids rom, and Dyson for our bedroom. Overall the Coway is my favorite. It’s a beast and has a low cost of annual maintenance. Strongly recommend.

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

I like this one too. It’s easier to maintain than corsi rosenthal boxes and is less noisy.

Same here! Got one for each room last year, and very satisfied with it so far.

Second the Coway Airmega! It is a beast, honestly. I’ve had it in my bedroom for over a year now, and you can literally feel the difference in air quality. 

I bought the coway airmega last year and love it ever since. The filter is really easy to change and it runs pretty quietly on low settings.

I have two large Coway Airmegas at home, a Levoit mini at work, and a portable QT3. I use all heavily to make indoor air safer to breathe - removing particulate matter (the most harmful part of breathing wildfire smoke) including airborne viruses. Note that air purifiers don’t remove gases like CO2 from the air and I find when CO2 gets high I will get migraines. Ventilation like opening a window is the solution to CO2 buildup, which is hard when the outdoor air is full of smoke — this is where having an air purifier can make a big difference.

I love my coway airmega.

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.

Just chiming in to say we’ve had a Coway Airmega running continuously 24/7 for the last 6 years and we LOVE IT.

we went with wirecutters top pick and like it; Coway Airmega no reason it needs to be smart, just does its sensing and we let it do it's thing. [https://www.nytimes.com/wirecutter/reviews/best-air-purifier/](https://www.nytimes.com/wirecutter/reviews/best-air-purifier/)

I got a Coway AirMega because my apartment used to smell like my stinky chihuahua no matter what I did, and the smell is gone. Like when I come back to my apartment and open the door, instead of being like "wow, that is what I've been noseblind to?!" it smells the same as the hallway. (Also really helps my dust mite allergy)

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

We use Coway Airmega air purifiers and we like them. I think they have a bunch of options for design and size.

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

I like the Coway AirMega

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.

My seasonal allergies got a lot better when I started using an air filter in the bedroom, so I would assume it works similarly on pets. It's horrifying how much dust it pulls out of the air. I have a Coway Airmega, mostly because that's what Wirecutter recommended. I buy the off-brand filters to save money 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

I'm sorry the Coway has what now? Pesticides? I finally bit the bullet and purchased one of the airmegas and I've been happy with it (the new plastic smell lasted a day but other than that) so that's kinda concerning....

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/

Coway Air Mega's are great. Blueair's larger units are equally great - with both DO not buy their filters directly from them - way overpriced - Amazon has generic equivalents that I have been using and have performed great (have air testers in home).

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

Coway Airmega. Consistently high marks and top recommendation by NYT's Wirecutter magazine (which does product testing). Not cheap but super quiet and efficient.

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).

Stick to basics- all you need is a good filter with a fan for PM 2.5. Thicker ones last longer before replacement. Some include additional charcoal/ carbon filters for VOCs and odors. Also try to get a thick/robust one of those as a cheap one I had just got saturated very quickly and ended up releasing smells rather than capturing them. Personally I have a few Coway Airmegas and retired a basic Iris Ohyama one. I also got air intake fans with PM filters so the air coming into the place is cleaner as well. I retrofitted a passive exhaust port into an active air intake as they're about the same size.

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

A Coway AirMega in the classroom was how I survived a couple bad wildfire years. It made an enormous difference.

Noisy on the quick clean burst mode where you tell it to briefly run as hard as possible. Moderate on high. Not noticeable at all under most circumstances.

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.

I have 3. A Coway Airmega, a Levoit Vital 200S-P, and a Welov. None of them do ionization (bad for their lungs and our lungs). The last 2 are smart/wifi ones that let me see the filter life in the app, that feature I appreciate since with birds the filter runs out waaaaaay sooner than the “change every 12 months” recommendation.

I got the airmega on Black Friday a few years ago and I’ve been really happy with it. We don’t get a lot of dust anymore and it really seems to help with kitty litter dust and such. Last year there were wildfires nearby and the airmega kicked itself into high gear (I keep it on auto), so I do really trust that it’s actually doing something.

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

This one is kinda meh. Get a Coway Airmega instead

Levoit Vital 200 or Coway Airmega for the 16x10. All the others you listed are too small for that square footage. The Levoit is quieter if that’s important to you. If you have a bedroom that is close to double that, you either need two of same unit or a much larger unit (like the Levoit core 600) to clean the bigger room.

I've got a Coway AirMega in the LR and it's great. In the master BR I've got a Levoit Vital 100 which someone gifted to me and it works well enough. I have a Levoit Core 300 in the smaller bedroom; the space is within the specs but it feels a little small if I need to keep it running on medium... a larger unit running on low might be better. I think they say the 300 is also the most expensive to run, almost 2x the Coway given the CFM.

My Coway Airmega detects odors very quickly and automatically speeds up the fan.

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 have these, 0 smell and great to put it on eco mode , as it detects poor air quality it automatically switches modes to higher setting and shows it as purple or red and once air is back to being good it goes back to eco mode and shows blue.

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

if you ever feel like making your own air filter, check our r/crboxes for some inspiration. I have an coway airmega, a 6 fan cr box from NorthBox, a levoit mini, and one of the tiny ikea air filters. every room gets a different size and type of air filter according to the needs of that room.

It's not Canadian, but CoWay are a Korean company that make their products in China & South Korea. I bought mine from Amazon before I deleted my account in January. They have a Canadian website for direct ordering though. I used it to buy the filters I needed to replace this year. [https://cowaymega.ca](https://cowaymega.ca)

Same, Airmega still strong.