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.

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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

Are Airmega cylinders worse that boxes? I cannot find definitive answers to this.

Honestly, I'm not sure if you'll really notice a difference in terms of performance and getting your air clean. My understanding is that the difference comes from potential longevity of the filters. Having a dedicated removable pre-filter and regular cleaning will prolong the life of the HEPA filter

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hartofalyon in r/AirPurifiers

November 24, 2025 7:45 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

2,720 ft³ space, 2 adults, 1 medium dog, UK = Coway 350?

Yep, should be adequate for the space. In the USA, Airmega 350 debuted just under a year ago. It seems to have good reviews so far. Keep in mind the Clean Air Delivery Rate (CADR) listed for it applies to the highest airflow speed/setting only. Lower settings have lower CADRs which reduces cleaning

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sissasassafrastic in r/AirPurifiers

January 25, 2026 7:25 PM

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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