Name: BLUEAIR Air Purifiers for Large Rooms, Cleans 3,048 Sqft In One Hour, HEPASilent Smart Air Cleaner For Home, Pets, Allergies, Virus, Dust, Mold, Sm...
Brand: BLUEAIR
SKU: B0BN2MGV5H
Price: 319.99 USD
Availability: InStock
Rating: 4.5 (12536 reviews)

Our Verdict

Coway 400(G) 400 GRAPHITE 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 slightly higher CADR smoke (416.0 vs 406.4) and coverage (650 sq ft vs 635 sq ft), with a quieter min noise (22 dB vs 23 dB). Choose Blueair for its stated 3,048 sq ft in one hour cleaning speed for rapid air purification.

$649Buy on Amazon

Bottom Line: Coway 400(G) 400 GRAPHITE is the better choice. It offers a slightly higher CADR smoke (416.

Key Differences

The most significant spec differences at a glance

406.4

Cadr Smoke

2% less

416

635

Coverage Sq Ft

2% less

650

Noise Level Db Min

5% more

Advantages

Where each product wins

BLUEAIR

Noise Level Db Min: 5% higher (23 vs 22.0)

Coway

Cadr Smoke: 2% higher (406.4 vs 416.0)
Coverage Sq Ft: 2% higher (635 vs 650.0)

Who Should Buy Which?

Find the right product for your needs

Buy BLUEAIR if...

BLUEAIR Air Purifiers for

If you need robust air purification for large spaces without a premium price tag, the Blueair Blue Pure 211i Max is ideal. It's perfect for budget-conscious homeowners prioritizing strong performance, evidenced by its 406.4 CADR and Energy Star Most Efficient 2023 certification. With real-time air quality monitoring and quiet 23 dB operation, it’s excellent for allergy sufferers and pet owners who value smart features and efficient cleaning.

Buy Coway if...

COWAY Air Purifiers for

The Coway 400(G) 400 GRAPHITE suits discerning buyers prioritizing peak filtration performance and minimal noise, willing to invest more. It's for those needing superior particle removal (99.999% of 0.01-micron particles) and a slightly higher CADR (416.0). With a 22 dB minimum noise level and a robust 5-year warranty, it's ideal for users seeking ultimate quietness, advanced features like Eco Mode, and long-term product assurance.

Spec Comparison

10 specs compared

Specification	BLUEAIR Air Purifiers for	Coway Air Purifiers for
Price	$320	$649
Rating	4.5(12.5k)	4.4(6.5k)
Cadr Smoke	406.4	416
Coverage Sq Ft	635	650
Noise Level db Min	23 dB	22 dB
Energy Star	Yes	Yes
Filter Type	True HEPA	True HEPA
Smart Sensor	Yes	Yes
WiFi	Yes	—
Filter Life Months	6	—
Noise Level db Max	53 dB	—
Weight	—	3.05 lbs

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Pros & Cons

Quick overview of strengths and weaknesses

BLUEAIR Air Purifiers

Pros

Cleans 3048 sq ft in one hour for large spaces.
Removes 99.97% of particles down to 0.1 microns.
Operates quietly, down to 23 dB at lowest setting.
Real-time PM1, PM2.5, PM10 air quality monitoring.

Cons

Filter replacement required every 6-9 months.
Operation limited to North America 110-120V.
Maximum noise output reaches 53 dB.

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.

Frequently Asked Questions

Common questions about this comparison

Which air purifier is better for overall coverage and efficiency?

The Coway 400(G) 400 GRAPHITE has a slightly higher CADR smoke of 416.0 and covers 650 sq ft effectively (4 ACH), compared to Blueair's 406.4 CADR and 635 sq ft. Both are Energy Star certified for efficiency.

What's the main difference in minimum noise level?

The Coway 400(G) 400 GRAPHITE operates slightly quieter at its lowest setting, with a minimum noise level of 22 dB. The Blueair Blue Pure 211i Max has a minimum noise level of 23 dB, making both excellent for quiet environments.

Which product offers better particle filtration?

Coway states it removes 99.999% of 0.01-micron particles, while Blueair removes 99.97% of particles down to 0.1 microns. Both use True HEPA filters, but Coway's claim suggests slightly finer particle capture.

Is there a significant difference in warranty or filter life?

Coway provides a 5-year limited warranty, offering long-term assurance. Blueair specifies a filter life of 6 months. Both products require periodic True HEPA filter replacement for optimal performance.