Head-to-head · Best Air Purifiers

Coway Airmega 400S vs Dyson Purifier Cool TP07

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

Coway Airmega 400S comes out ahead by a clear margin (4.5 vs 3.1). The gap is mostly about Owners of large open-concept living areas — read the strengths below before deciding.

Higher ratedRanked #1 in Best Air Purifiers

Coway Airmega 400S

4.5

3 sources$749as of Aug 1

Large spaces are the Coway Airmega 400S's job, and it cleans up to 3,120 sq. ft. quickly while staying quiet in sleep mode. Air cleaning performance is the strength, and the smart controls are genuinely convenient. The drawbacks worth weighing before buying: high operating costs and a large physical footprint.

Strengths

— Covers spaces up to 3,120 sq. ft. with high efficiency
— Removes 100% of particulates in 45 minutes during testing
— Operates at whisper-quiet 22 dB in sleep mode

Watch-outs

— High operating cost due to expensive replacement filters
— Bulky dimensions (14.8" x 22.8" x 14.8") occupy significant floor space
— Requires a mobile app to access certain smart features

$749 · Buy at cowaymega.com Full review →

Ranked #4 in Best Air Purifiers

Dyson Purifier Cool TP07

3.1

3 sources$239.68as of Jun 7

Purification and cooling in one unit is the Dyson Purifier Cool TP07's trick, using HEPA H13 filtration to capture allergens and VOCs, with smart home integration on top. The cost is high, and it suits small rooms under 99 square feet poorly, which is a problem for anyone hoping to cover a whole home.

Strengths

— Combines air purification and cooling fan functions in one unit
— Fully sealed HEPA H13 filtration captures ultrafine particles, pollen, and VOCs
— Integrates with smart home ecosystems including Alexa, Siri, and Google Home

Watch-outs

— Limited coverage area suitable only for small rooms up to 99 square feet
— High price point compared to standard air purifiers or fans

$239.68 · Check Price on Amazon Full review →

How they stack up

Coway Airmega 400S

The Coway Airmega 400S dominates in raw coverage power, cleaning spaces up to 3,120 sq. ft., which far exceeds the 540 sq. ft. limit of the Blueair Blue Pure 211+ and the 99 sq. ft. limit of the Dyson TP07. While it shares smart features with the Levoit Core 400S, the Coway is physically much bulkier and incurs higher long-term filter costs than the Levoit.

Dyson Purifier Cool TP07

Unlike the Coway Airmega 400S or Blueair Blue Pure 211+, the Dyson Purifier Cool TP07 uniquely combines air purification with active cooling, making it a dual-purpose device rather than a dedicated purifier. However, its coverage area is significantly smaller than the Coway's 3,120 sq. ft. capacity, and it lacks the simple one-button interface found on the Blueair model.

Specs side-by-side

Spec	Coway Airmega 400S	Dyson Purifier Cool TP07
CADR	328 cfm	94 CFM
Room Coverage	3,120 sq. ft.	99 square feet
Noise Level	22 dB	35.5–54.4 dB
Filtration System	HyperCaptive (Pre-filter, Carbon, HEPA)	HEPA H13
Dimensions	14.8 x 22.8 x 14.8 inches	7.7 x 8 x 41 inches
Weight	24.7 lbs	10.8 lbs
Power Consumption	66 W	28.9 W
Filter Lifespan	Up to 12 months	12 months

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