Coway
ProX(W)
Based on 122 Reddit mentions
$666.99
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Sentiment summary across the product areas Reddit users mention most.
Reddit mentions
Original Reddit posts and comments behind this analysis.
Need Advice for Buying Air Purifier(s)
Just ignore the coverage claims. The 2,126 sq. ft. value applies to 2 Air Changes per Hour (ACH). I would take the top Smoke CADR and multiply it by 1.5 to get the largest room size. For the Coway Airmega ProX's Smoke CADR of 568 CFM, this means the largest room size would be 852 sq. ft. with an 8 f
...sissasassafrastic in r/AirPurifiers
July 31, 2026 9:47 PM
2
Need Advice for Buying Air Purifier(s)
Neither the Winix C909 nor the Levoit Core 600S-P would be enough. Per the AHAM 2/3 rule, a 2,400 sq. ft. home with 8 ft. ceilings would need minimum Clean Air Delivery Rates (CADRs) of 1,600 CFM. Since you have cats and a dog, even higher CADRs would be a good idea. There's no single consumer-grade
...sissasassafrastic in r/AirPurifiers
July 30, 2026 11:01 PM
2
Smart Air Blast Mk II vs. Coway Airmega ProX
I agree trying a different set of filters is a good suggestion, which I why I've already done that myself! 😄 A couple of weeks ago I contacted Coway, and they sent me a new set of filters. They've been running for about five days, and emit the same odor, though it's possible they're airing out faste
...theorist9 in r/HouseFresh
May 16, 2026 7:07 PM
2
How long for new-filter smell to dissipate on the Coway Airmega ProX?
I appreciate the upvote. I was blissfully unaware that down voting was even a thing here. I am pretty new to this forum and hadn't noticed. Kindof sad that I know that now! I appreciate all your calculations.. I have done much of the same trying to find the right combo of dB, CFM, and cost. And yeah
...FairManner1292 in r/HouseFresh
April 25, 2026 5:41 AM
2
Levoit Core 300 fails to lower HCH0 and TVOC's (and probably most commercial grade purifiers). Any alternatives?
Well, the larger and more premium Coway models (Airmega Mighty2 AP-1512N / 250 / 300 / 350 / 400 / 450 / ProX) would probably tend to have greater activated carbon weights compared to the Levoit Core 300. But in general, Coway isn't well-suited to regular and/or high concentrations of VOCs.
sissasassafrastic in r/AirPurifiers
July 9, 2026 6:10 PM
1
ACH
I have two Coway Airmega ProX's in a 2-room apt with a 4000 ft^3 open-plan LR/dining room/kitchen and a 1680 ft^3 bedroom. At night, the bedroom unit runs on sleep mode (170 CFM), which gives 6 ACH, and the LR unit runs on speed 3 (460 CFM), which gives 7 ACH. During the day I run the bedroom unit a
...theorist9 in r/HouseFresh
May 13, 2026 7:11 AM
1
Coway Airmega 400s
4.8-5 represents the minimum recommended Air Changes per Hour (ACH), not CADRs. CADRs are the more important metric. See the AutoModerator comment (and various wiki page entries) about the AHAM 2/3 rule for particulate CADRs. A few notes. First, purifiers aren't good at significantly reducing visibl
...sissasassafrastic in r/AirPurifiers
June 24, 2025 2:19 AM
2
Setup for 1400sqft apartment
We need to calculate room volume since your ceilings are higher than 8 feet. This is covered under the "CADR Particulate Types and Sizing" heading in our How To Choose An Air Purifier for Particulates [Comprehensive Guide]. Bedroom: 160 sq. ft. × 10 = 1,600 cubic feet volume. 1,600 cu. ft. ÷ 8 ft. =
...sissasassafrastic in r/AirPurifiers
July 15, 2025 5:32 PM
2
I’m in the US, my bedroom is between 300 and 400 square feet with 12 foot ceilings
Do you need quieter operation at night? Unfortunately because of the high ceilings, this increases room volume and in turn, requires a bigger purifier. A large HEPA purifier isn't in your budget (e.g., Coway Airmega ProX or a Coway Airmega 400). Hard to recommend accurate CADRs as you don't have an
...sissasassafrastic in r/AirPurifiers
November 26, 2025 4:54 PM
1
For the Love of god
Clean Air Kits does offer the option of pre-assembled kits. In choosing the Assembled - UL507 and Mesh Guard options, this significantly increases the price of the Luggables XL Ultra - 7 MobiusP to $499. Claimed top CADR for the XL Ultra - 7 MobiusP is 401 CFM. Are you able to assemble the AirFanta
...sissasassafrastic in r/AirPurifiers
June 13, 2025 7:49 PM
1