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.

The short answer

Coway Airmega 400S comes out ahead by a clear margin (4.5 vs 3.8). 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

$749as of Apr 22

The Coway Airmega 400S is a powerful air purifier designed for large spaces, capable of cleaning up to 3,120 sq. ft. with exceptional speed and low noise in sleep mode. While it excels in air cleaning performance and offers convenient smart controls, its high operating costs and large physical footprint are notable drawbacks for potential buyers.

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 · Check Price on Amazon Full review →

Ranked #4 in Best Air Purifiers

Dyson Purifier Cool TP07

3.8

$582as of Apr 22

The Dyson Purifier Cool TP07 effectively combines air purification and cooling, utilizing HEPA H13 filtration to capture allergens and VOCs while offering smart home integration. However, its high cost and limited suitability for small rooms under 99 square feet may deter buyers seeking whole-home solutions.

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

$582 · 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	—
Room Coverage	3,120 sq. ft.	99 square feet
Noise Level	22 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	—	10.8 lbs

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