
AirFanta
$164.99

Coway
RedDB rating based on Reddit opinions
Reddit score
RedDB's algorithmic rating based only on relevant Reddit opinions.
It uses one opinion per author: their highest-upvoted mention.
Evidence volume, recency, and votes affect the result.
The opinion count and sentiment bar include all analyzed relevant opinions; the bar does not represent the score out of 100.
$679.99
We may earn a small commission.
Sentiment summary across the product areas Reddit users mention most.
Original Reddit posts and comments behind this analysis.
Litter Robot 4!!! (Worth its weight in gold) Miele vacuum Bosch dishwasher A quality desk chair (Steelcase Gesture, HM Embody, etc) Victorinox Kitchen knives Conway AirMega 400 (smaller ones are good too) Induction cooktops Faherty hoodies Simplehuman trash can and matching bags Fitted car floor mat
...deadbalconytree in r/HENRYfinance
September 26, 2025 at 12:26 AM
26
Do you know the dimensions of the basement? A room's length x width x height are used to size purifiers. The largest room size the Coway Airmega 400 should be 492 sq. ft. with an 8 ft. ceiling. This is based on the AHAM 2/3 rule and the Airmega 400's Smoke CADR of 328 CFM running on the highest airf
...sissasassafrastic in r/AirPurifiers
September 27, 2025 at 11:55 PM
3
If you have high concentrations of particulates (e.g., pollen or smoke particles) and VOCs (which are gases), you need two types of air purifier. This is because most purifiers have very little activated carbon or other sorbent media by weight for gases/vapors/odors/VOCs. Instead, they're designed f
...sissasassafrastic in r/AirPurifiers
December 20, 2025 at 10:27 PM
2
Hi, I created the newest iteration of the Buying Guide. I didn't include the Coway Airmega 300 because in the past, the Coway Airmega 400 would be discounted frequently enough to justify its purchase instead. Annoyingly, there were no good Black Friday or Christmas sales for the Airmega 400 or Airme
...sissasassafrastic in r/AirPurifiers
January 6, 2026 at 12:31 AM
2
In the future, you may want to make a post in this subreddit instead. That would probably yield more views and responses. 😊 Since medium to large is very subjective, it's hard to give exact recommendations. "Cleaning performance" is usually best measured by the Clean Air Delivery Rate (CADR). Higher
...sissasassafrastic in r/AirPurifiers
January 12, 2026 at 9:35 PM
2
See the AutoModerator comment. Purifiers aren't good at reducing visible dust particles as they're large and heavy compared to "invisible" pollutants like PM2.5. An even stronger argument could be made for dog hair. If you don't have one already, I'd get a good quality bagged vacuum cleaner with a H
...sissasassafrastic in r/AirPurifiers
February 27, 2026 at 9:01 PM
2
The Coway Airmega 400 sounds best for our needs, but I'd like to know from anyone who has one, if the running noise bothered their dogs. I just sent back my Mill food grounds machine because our new rescue dog couldn't stand the noise (which frankly I could barely hear). Our other dog didn't have a
...yellowpinto in r/Home
April 23, 2026 at 6:15 PM
1
Again, I think it's the way the Airmega 400 is designed (albeit counterintuitive). The highest and second highest airflow speeds/settings wouldn't be night mode anyways. The purpose of any night or sleep mode on a purifier is to reduce light output and run on a very quiet speed.
sissasassafrastic in r/AirPurifiers
December 23, 2025 at 12:49 AM
1
So AHAM recommends Clean Air Delivery Rates (CADRs) be a minimum of 2/3 your room's area (assuming an 8 ft. high ceiling). However, if you have allergies or higher-than-normal pollution levels I would choose even higher CADRs. First room needs minimum CADRs of 264 CFM. For this, I would recommend th
...sissasassafrastic in r/AirPurifiers
September 18, 2025 at 9:35 PM
1
Yes. The Coway Airmega 400 sometimes drops in price enough to justify purchasing instead. Last year in the run up to Black Friday, the Airmega 400 was $349. In 2024, I also saw the price around $369 occasionally. Right now, the Airmega 400 is full price. This usually happens before a significant sal
...sissasassafrastic in r/AirPurifiers
November 20, 2025 at 6:01 PM
1

AirFanta
$164.99

Levoit
$84.98

Coway
$905.00