Airmega 450

Coway

Airmega 450

9 positive 0 neutral 6 negative

Based on 15 Reddit mentions

Reddit mentions

Original Reddit posts and comments behind this analysis.

Best AirPurifier unlimited budget

An IQ air HealthPro 250 XE is considerably better for the same price, but of course, it's quite ugly; they've had the same design for 30 years. Another option would be a Coway Airmega 450, but I personally don't like the treated green filters they use.

Walla-Expert in r/AirPurifiers

April 6, 2026 9:32 AM

3

Coway Sale - Need to pick one

Going by the AHAM 2/3 rule, your 15' x 15' x 10' bedroom needs minimum Clean Air Delivery Rates (CADRs) of 188 CFM. The Coway Airmega 250S can achieve that, although I don't know if you have allergies, high pollution levels, or other circumstances that need increased CADRs. The Coway Airmega 450 doe

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sissasassafrastic in r/AirPurifiers

September 27, 2025 11:56 PM

3

Over thinking and analyzing every review

I assume the 500 sq. ft. you mentioned in another comment is an open space without walls. (You need a purifier for each room, as they can't overcome walls and doors.) If the 500 sq. ft. is open, you would need a minimum of 334 CFM CADRs. These figures are for normal pollution levels. You may have el

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sissasassafrastic in r/AirPurifiers

May 30, 2025 9:29 PM

2

Air Purifier Recommendation

I assume you're an expatriate living in the US? Most Americans don't use "whilst". 😉 Unfortunately if you have high levels of particulates (pollen, dust, mold, etc.) and gases/vapors/odors (including VOCs), you generally need two types of air purifier. This is because particulates-focused purifiers

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sissasassafrastic in r/AirPurifiers

October 3, 2025 12:52 AM

2

I analyzed 1 year of air purifier recommendations on Reddit (Nov 2024–2025)

Regarding air purifiers, this has to come out, so Coway Korea must be responsible for it. I have had 3 Coway Airmega 450 now, all 3 are defective from the factory, the sensor is broken, the pm meter freezes at pm1, the motor is broken on all 3, no air comes out of the air purifier at all , it cleans

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Beginning_Fish_9010 in r/BuyItForLife

April 18, 2026 9:55 AM

1

Advice for studio spacr

Unfortunately if there is wildfire smoke, Smoke CADR needs to equal your studio's area (assuming an 8 ft. high ceiling). So Smoke CADR should total 900 CFM. FYI: the Smart Air Blast MKII composite CADR of 950 is in m3/h. This coverts to 559 CFM. Do you already own the Airmega 450 and the Airmega 240

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sissasassafrastic in r/AirPurifiers

July 20, 2025 4:06 PM

1

Top alternatives in Air Purifiers

#1
Core 300

Levoit

Core 300

$84.99

positive
neutral
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