Coway - Airmega ProX

Pro X does have activated carbon but not a lot. Just a few lbs and they're connected to the HEPA filters meaning if you want to run it under ideal circumstances you'll have to replace the filters when the carbon is full which happens way faster than the HEPA portion. That's one of the nice thing about the IQAIR unit is that it has separate filters. However the PM2.5 particulate is the most immediate danger from the smoke and the Pro X will absolutely breeze through filtering that. It'll probably do ten or more air changes per hour in a room that small.

Coway Pro X and Smart Air Blast. They don't have as much carbon as units like Austin Air or AlerAir but if you're looking for straight particulate filtration while being quiet, those are some of the best out there.

For particle filtration I'm a big fan of the coway airmega proX when it's on sale, or a smartair blast. Gasses/vocs are more complicated as it depends heavily on the particular compound you need to adsorb, and there honestly aren't many good options in the residential purifier space for many of them so ventilation or source control is typically a far better option than trying to filter them

Yes I have one. The proX doesn't have app connectivity, but it's what I'd choose for a large area. Not familiar with the atmosphere sky. Iqair's new healthpro XE with wifi is another option if you want app connectivity, some gas filtration, and don't mind spending a lot

I forgot to mention these two specifically in my comment. Easily the best big machines for low noise.

If aesthetics and noise levels are important to you, Coway ProX for the main living space (assuming it’s large-ish) and any Coway “medium spaces” unit (use their website to filter) for the Bedroom. Total ~$1k. If aesthetics and noise levels are not important, two AirFanta 3Pro, run on Medium-High, about $400. If aesthetics are not important but noise is, four AirFanta 3Pro, run on Low or Medium-Low, about $800. If your budget is a little flexible and you want the highest CADR with the smallest footprint and lowest noise, a SMART AIR BLAST - MKII for the main living space (about $1,100) and any Coway “medium spaces” unit. Total, about $1,500.

FWIW, I have bad environmental allergies to chemicals and smoke, both of which block my nasal passages and result in sinus infections. For years, the air filter I used was the IQ Air HealthPro Plus, which is modestly effective. More recently, I bought a Coway Airmega ProX, which seems to be more effective for me. It’s a big filter that is made for large spaces and it filters smoke and VOCs with a carbon filter. On the high setting, it filters the air in a 1,000 square foot room 4 times per hour. In your bedroom, which is small, it would take less time to filter the air. Others are right in telling you to escalate your complaint or move out. But I just figured I would chime in to say that Amazon has a 30-day return policy, so if you want to test out an air purifier like the Coway, you can likely return it and get your money back.

Agree here. I have the Coway ProX and the Medify MA-112. They both move lots of air. The ProX is more quiet and built better, but is also a bit larger.

I have the Winix C909 and Coway Pro X. Yes they are completely in terms of size and need, but they both feel like nice quality to me. I use each in the appropriate size room and it feels the same to me 🤷🏻‍♂️. Only bought both when they were on sale though. I personally think Coway is only worth it on a good sale

The only Coway that comes close to providing 5 air changes per hour in a 900 sq ft space is the Coway Airmega Pro X. Energy Star has CADR and recommended room size for Coway devices based on 5 air changes an hour. [https://www.energystar.gov/productfinder/product/certified-room-air-cleaners/results?formId=0304900d-f3f8-46b0-87df-a67bf35eaadd&scrollTo=1267.878662109375&search\_text=&brand\_name\_isopen=1&is\_most\_efficient\_filter=0&markets\_filter=United+States&zip\_code\_filter=&product\_types=Select+a+Product+Category&sort\_by=smoke\_free\_clean\_air\_delivery\_1&sort\_direction=desc¤tZipCode=&page\_number=0&lastpage=0&brand\_name\_filter=Coway](https://www.energystar.gov/productfinder/product/certified-room-air-cleaners/results?formId=0304900d-f3f8-46b0-87df-a67bf35eaadd&scrollTo=1267.878662109375&search_text=&brand_name_isopen=1&is_most_efficient_filter=0&markets_filter=United+States&zip_code_filter=&product_types=Select+a+Product+Category&sort_by=smoke_free_clean_air_delivery_1&sort_direction=desc¤tZipCode=&page_number=0&lastpage=0&brand_name_filter=Coway) I know Coway and many other brands likes to promote the larger square footage but you're only getting one air change an hour. The Pro X for example is marketed at over 4,000 square feet but it's only one air change. That won't be enough to help with odors.

Coway ProX is a bit outside your budget but truly fits all the criteria - very quiet, high CADR, large prefilters to collect a lot of dust and can be easily cleaned

r/AirPurifiers The first step is to tell us your room size. This is length x width x ceiling height. Room size helps us determine Clean Air Delivery Rates (CADRs). People with allergies generally need greater CADRs than the bare minimum suggested by the Association of Home Appliance Manufacturers. The second: what are your allergies? Are they particulates based (soot, pet dander, dust, smoke particles, pollen, etc.), gases/vapors based, or both? Lastly, we need a budget. Powerful *and* quiet air purifiers aren't cheap. Consumer-grade air purifiers won't be BIFL. Commercial-grade and industrial-grade units claim a high number of operating hours (e.g., 50,000-100,000) because they're being run 24/7. Unfortunately heavier duty machines are really expensive ($2,000 and up) and generally very loud. The quietest high performing air purifier is the **Smart Air Blast MKII Air Purifier**. Top specified Sound Level is 43 dB. Top Composite CADR is 559 CFM. Separate particulate CADRs are not measured. It has a metal body and wheels. Price is $929 from Smarter HEPA. Another great choice is the **Coway Airmega ProX**. Top specified Sound Level is 46 dB(A). CADRs are in the mid-500s CFM. Also has wheels and many other features. Price: currently $899. The **ProX** has been on sale for $619 several times in the past few months. If you can hold out, you may want to track the price for a better deal.

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)

I don't think the absolute best purifiers for a large room are on this list. In order to calculate minimum Clean Air Delivery Rates (CADRs), we would need your room's length x width x height. [CADRs should be at least 2/3 of your room's area (assuming an 8 ft. high ceiling)](https://ahamverifide.org/ahams-air-filtration-standards/). For wildfire smoke treatment, Smoke CADR should *equal* your room's area which again assumes an 8 ft. ceiling. The best for large rooms in my opinion would be the [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox) and the [Smart Air Blast MKII](https://www.smarterhepa.com/products/smart-air-blast) as both are quiet and powerful. From the list OP has shared, the best is clearly the [Medify Air MA-112](https://medifyair.com/products/ma-112?variant=31240021180483). However, it is very loud at 70 dBA. Keep in mind that CADRs are usually listed for the top speed setting only. The top seed is the loudest. Lower speeds have lower CADRs.

First: unfortunately air purifiers aren't very good at capturing pet hair. It's very large and heavy compared to something much smaller like PM2.5. Pet hair will be captured only if it's very close to the purifier's intake. Ultimately it would be very helpful to have the length x width x height of the room so we know what Clean Air Delivery Rates (CADRs) would be appropriate. If the purifier is going to be in the same room as the baby, you need to ensure sound levels are low. Obviously distance from the purifier matters too. According to a *Pediatrics* article, [USA hospital nurseries have recommended sound limits of 50 dBA (decibels A-weighted)](https://doi.org/10.1542/peds.2013-3617). In order to maintain adequate CADRs while keeping the unit sufficiently quiet, we generally recommend "oversizing" the purifier. The first choice in consumer brands is generally **Coway** as it's higher quality. In particular, the [Coway Airmega 300](https://cowaymega.com/products/airmega-300), [Coway Airmega 400](https://cowaymega.com/products/airmega-400), and the (top of the line) [Coway Airmega ProX](https://cowaymega.com/products/airmega-prox) are premium units, all of which have a 5 years warranty. Right now, Coway units are full price but sale periods are frequent and significant. If you can wait, I would definitely do so until the prices come down. Alternatively, [Sylvane.com](http://Sylvane.com) has pretty good prices on the aforementioned models. Just remember that CADRs apply to the highest speed/fan setting only. Lower & quieter speeds will have lower CADRs which are unlisted.

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.

...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.

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).

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

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.

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

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.

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.