Name: COWAY Air Purifiers for Home Large Room Up to 3,120ft², 2 Sets of Washable Pre-Filters and True HEPA Filters for Smoke, Allergies, Pet Dander, Odor...
Brand: Coway
SKU: B0722YZ1R1
Price: 649 USD
Availability: InStock
Rating: 4.4 (6465 reviews)

Our Verdict

Coway 400(G) Wins

COWAY Air Purifiers for Home Large Room Up to 3,120ft², 2 Sets of Washable Pre-Filters and True HEPA Filters for Smoke, Allergies, Pet Dander, Odor, AQI, Auto & Sleep Mode, Timer, 5yr Warranty, 400(G) 400 GRAPHITE - High-End Air Purifiers

It offers a strong CADR smoke of 416 and covers 650 sq ft, vital for effective air purification, unlike Dyson's unstated metrics. Choose Dyson for integrated heating/cooling and advanced gas/formaldehyde removal, prioritizing these over raw purification power.

$649Buy on Amazon

Bottom Line: Coway 400(G) is the better choice. It offers a strong CADR smoke of 416 and covers 650 sq ft, vital for effective air purification, unlike Dyson's unstated metrics.

Key Differences

The most significant spec differences at a glance

416

Cadr Smoke

100% more

650

Coverage Sq Ft

100% more

Advantages

Where each product wins

Coway

Cadr Smoke: 100% higher (416.0 vs 0)
Coverage Sq Ft: 100% higher (650.0 vs 0)

Who Should Buy Which?

Find the right product for your needs

Buy Coway if...

COWAY Air Purifiers for

The Coway 400(G) is ideal for individuals prioritizing robust, quantifiable air purification for large spaces. If you need effective removal of smoke, allergens, and pet dander across 650 sq ft, and value a clear CADR smoke rating of 416, this is your choice. Buyers who appreciate a long 5-year warranty, a low minimum noise level of 22 dB, and Eco Mode for energy savings will find the Coway a reliable and efficient option, offering strong performance without the premium for heating/cooling functions.

Buy Dyson if...

Dyson Purifier Hot+Cool HP2

The Dyson Purifier Hot+Cool HP2 De-NOx is best suited for tech-savvy buyers seeking a premium, multi-functional device that goes beyond standard air purification. If you desire year-round climate control with both powerful heating and cooling, alongside advanced air quality features like formaldehyde destruction and enhanced NO2 capture, Dyson is ideal. Those who prioritize smart home integration via the MyDyson app and voice control, and are willing to invest in a sleek design with comprehensive air quality insights, will find value despite the lack of stated CADR or coverage area.

Spec Comparison

8 specs compared

Specification	Coway Air Purifiers for	Dyson Purifier Hot+Cool HP2
Price	$649	$699
Rating	4.4(6.5k)	4.3(169)
Cadr Smoke	416	0
Coverage Sq Ft	650	0
Noise Level db Min	22 dB	—
Weight	3.05 lbs	—
Energy Star	Yes	—
Filter Type	True HEPA	HEPA H13
Smart Sensor	Yes	Yes
WiFi	—	Yes

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Pros & Cons

Quick overview of strengths and weaknesses

Coway Air Purifiers

Pros

Removes 99.999% of 0.01-micron particles.
Covers 780 sq ft with 4 air changes per hour.
Smart Mode adjusts fan speed based on air quality.
Eco Mode shuts off fan when air is clean.

Cons

Stated 3,120 sq ft coverage misleading for 4 ACH.
True HEPA filters require periodic replacement.
No remote control listed in features.

Dyson Purifier Hot+Cool

Pros

Captures 50% more NO2.
HEPA H13 filters 99.97% of 0.3 micron particles.
Destroys formaldehyde; removes odors and gases.
Provides even room heating and powerful cooling.

Cons

Lacks standardized CADR rating for smoke.
No specified coverage area in square feet.
Full features require MyDyson app or voice service.

Frequently Asked Questions

Common questions about this comparison

Which air purifier is better for removing smoke and general particles?

The Coway 400(G) is superior for smoke and general particle removal, boasting a CADR smoke rating of 416. The Dyson HP2 De-NOx does not provide a CADR smoke rating, making its effectiveness in this area less clear for comparison.

What is the main difference in coverage area?

The Coway 400(G) explicitly states a coverage area of 650 sq ft, ensuring effective purification for large rooms. The Dyson HP2 De-NOx, however, does not specify its coverage area in square feet, which makes it harder to assess its suitability for different room sizes.

Is the Dyson's higher price justified by its features?

The Dyson HP2 De-NOx is pricier but offers unique features like heating, cooling, formaldehyde destruction, and enhanced NO2 capture, plus smart app control. If these multi-functional capabilities are highly valued, its price might be justified over the Coway's dedicated purification focus.

Which product is better for addressing indoor air quality beyond basic particle filtration?

The Dyson HP2 De-NOx excels here, as it's designed to capture 50% more NO2 and actively destroys formaldehyde, in addition to filtering 99.97% of 0.3 micron particles with its HEPA H13 filter. Coway focuses on 0.01-micron particle removal.