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.

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.

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

A True HEPA H13 filter is non-negotiable, as it traps 99.97% of harmful pollutants like PM2.5, allergens, and viruses. First things first, buy an [AQI reader/monitor](https://amzn.to/4fsfyrx) in case the air purifier is not fitted with one, or you want a comparison. If you prefer something that's not noisy and also economical, you can go for the [Coway Professional Air Purifier](https://amzn.to/47aYClJ). Effective and works as expected. It's also highly not recommended to go cheap when it comes to air purifiers, but if you want to restrict your budget, here you go: [Honeywell Air Purifier for Home & Office](https://amzn.to/40Ytq78) For portable air purifiers, go for [AirTamer A320 Rechargeable Personal Air Purifier](https://amzn.to/3H4EJnz) if you're looking for features.

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.

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).