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.

So for a room of that size, you either need one quite large air purifier, or two smaller ones that each handle roughly half the room. A unit like Coway ProX or Smart Air Blast/Air Blast Mini could easily handle 4 or more air changes per hour in a 900 square ft room as long as they were roughly centrally placed. As for your bedroom, it's not bad to go with an overkill unit like a Coway 300 for example because the best way to run an air purifier is to leave it running 24/7 at the highest fan speed you can stand. So for a bedroom in particular, if you overprovision the air purifier, you can run at speed 1 or 2 all day and night, and still get the requisite 4 or more air changes per hour, all while making very little sound. That logic also applies to whatever purifier(s) you want for your living area, but being quiet is just particularly important for the bedroom. The Air Blast/Blast Mini and OneX are quiet though as well for the record. They're just quite large and not all that good looking.

Coway airmega proX. On sale at Coway right now for $619, best cadr of any residential unit, very quiet even on higher fan speeds, modern looking. But it's big, don't get it unless you're unboxing it for her.

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

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.

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.

Are most of your allergies particulates (e.g., animal dander, pollen, mold spores, smoke particles, soot) or gases/vapors (e.g., perfumes/fragrances, odors from cleaning chemicals, off gassing carpet)? If you have any allergies to gases or vapors, you would need a heavier-weight sorbent media air purifier. Listed Clean Air Deliver Rates (CADRs) for most purifiers pertain to the highest speed setting. Are you running the Levoit on the highest setting most of the time? Next related question: do you need relatively quiet performance, especially for sleeping? Unfortunately many purifiers are really loud on their top setting. But lower speeds have lower CADRs. To get better performance with quiet operation, it would be wise to oversize your air purifier. I think the best bet could be the **Coway Airmega ProX**. The Mocha Beige color is on sale at the moment—apparently it's Coway's Halloween sale in the USA. **Coway Airmega ProX** * Room Size: 4.8 ACH at 886 sq. ft. * Other ACH: 14 ACH at 300 sq. ft. * Particulates Filtration: HEPA H13 * Sound Levels: 23 - 46 db(A) * Dust CADR: 580 CFM * Pollen CADR: 450 CFM * Smoke CADR: 568 CFM * Features: Locking wheels, Smart Modes, "Max2" Filter Replacement Indicator, Pre-Filter Maintenance Indicator, PM & Air Quality Unit Indicator, Air Quality Indicator * Price: Currently $619 in Mocha Beige at [Coway](https://cowaymega.com/products/airmega-prox?variant=45657065750782) As for a car purifiers, there aren't any very good options as they're loud and quite weak. If your car's air flow is strong enough to overcome the pressure drop, there are makers of HEPA cabin air filters out there (such as Bosch).

Depending on the sources or intrusion points of particulates, you could capture certain pollutants sooner by placing them in different areas of the bedroom. You'd have double the CADRs of one **Airmega 240**. **Total CADRs for Two Airmega 240s:** * Dust CADR: 584 CFM * Pollen CADR: 686 CFM * Smoke CADR: 564 CFM Running **two Airmega 240 units** at the listed top speeds (51 dB + 51 dB) would be 54 dB. You can use this Decibel Calculator here if need be: [https://www.noisemeters.com/apps/db-calculator/](https://www.noisemeters.com/apps/db-calculator/) A little more about the **Airmega ProX**: it does have locking wheels, but it also weighs 51 lbs. The purifier's design features dual intakes on the front and back. Coway recommends 6 - 12 inches between the air inlet(s) and any objects. I would tend to leave 12 inches as the Airmega ProX is a more powerful unit. You'll need to ensure you have ample floor space and distance from walls. Link: [https://cowaymega.zendesk.com/hc/en-us/articles/1500002847062-Where-should-I-place-my-air-purifier](https://cowaymega.zendesk.com/hc/en-us/articles/1500002847062-Where-should-I-place-my-air-purifier) Yes, I would choose Coway units over **Medify Air MA-112**. As mentioned before, the MA-112 is still *really* loud even for people who don't mind noise. (I don't know how much you know about decibels, but a 10 dB increase is perceived as being *twice as loud* as it's a logarithmic scale.) Coway is likely better in build quality than Medify Air. The MA-112 *does* have great CADRs. However, if it came down to the MA-112 vs. the Airmega ProX, I would choose the latter in a heartbeat. Again... keep in mind real life sound or noise performance may be louder than what's in the specifications.

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.

You didn't list your country of residence per **Rule 4**, so I'm guessing you're American. I'll also assume you're primarily interested in particulates filtration. Even a high-end freestanding purifier cannot overcome walls and doors. You need a purifier for each room or area. The "absolute best" units are generally intended for commercial or industrial use. The **Omni CleanAir OCA1500 Portable Air Purifier** claims its CADR is about 1,499 CFM and 66 dBA at top speed which is very loud. It's intended to be operated continuously so you can expect a very long service life. [But the OCA1500 costs a whopping $4,995.00 USD](https://shop.omnicleanair.com/products/oca1500-commercial-air-purifier-1500-cfm). Do the air purifier(s) need to be quiet as well? Clean Air Delivery Rates (CADRs) are often taken at top speed. Many purifiers at top speed are loud. Medify Air's higher end units and commercial/industrial purifiers (as shown above) suffer from this problem. The quietest performing high-end unit is the **Smart Air Blast MKII**. I don't know if your Mom will like its aesthetic or not. * Particulates Filtration: H13 HEPA filter (150 sq. ft. in surface area) * Top Sound Level: 43 dBA * Composite CADR: 559 CFM * Separate particulate CADRs not measured * Features: Steel housing and locking casters * Link: [https://www.smarterhepa.com/products/smart-air-blast](https://www.smarterhepa.com/products/smart-air-blast) The runner-up in terms of high performance and quiet operation is the **Coway Airmega ProX**. * Particulates Filtration: H13 HEPA Filters * Top Sound Level: 46 dbA * Dust CADR: 580 CFM * Pollen CADR: 450 CFM * Smoke CADR: 568 CFM. * Features: Locking wheels. * Colors: White or Mocha Beige. * Link: [https://cowaymega.com/products/airmega-prox](https://cowaymega.com/products/airmega-prox) Certain **Blueair** units have won design awards, such as the **Protect 7470i** and the **DustMagnet 5440i**. However, these units are *not* high performing in terms of CADR. You would need to purchase multiple units per room to match the CADRs of the **Smart Air Blast MKII** and the **Coway Airmega ProX**. The best performing Blueair is the **Classic 605**. Don't know if your Mom will be keen on this look either. * Particulates Filtration: "HEPASilent" technology (ionizer plus mechanical filters) * Top Sound Level: 62 dB * Dust CADR: 500 CFM * Pollen CADR: 640 CFM * Smoke CADR: 500 CFM * Features: Wheels and galvanized steel housing. [Conforms to Intertek's "Zero Ozone" program](https://sustainabilitydirectory.intertek.com/product/e87bd306-a065-4960-e428-08dc4a9887b4) (ozone emitted is ≤ 0.005 ppm). * Link: [https://www.blueair.com/us/air-purifiers/classic-605/2929.html](https://www.blueair.com/us/air-purifiers/classic-605/2929.html) Keep in mind Blueair uses an ionizer as part of their "HEPASilent" technology (a trademarked name); the mechanical filters do not conform to a HEPA standard. # Edit - there are issues with the Classic 605's unit disassembly and potential hair entanglement in the fan. See the reply to this comment.

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.

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

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

I have this. https://cowaymega.com/products/airmega-prox Build quality is shockingly good and it absolutely devours odors, dust, pollen, particulate matter, etc. Seemingly BIFL.  It’s almost undetectably silent. 

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.

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

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

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

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

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

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

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

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

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

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

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

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

I have one. They are legit.

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

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

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

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

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

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

\+1 Coway Airmega.

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

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

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

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

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

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

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

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

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

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.

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

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

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.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Second Coway.

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

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

This one is kinda meh. Get a Coway Airmega instead

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

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

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

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