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 superior CADR at 416.0 vs 390.87, better coverage at 650 sq ft vs 610.73 sq ft, and quieter operation at 22 dB min vs 31.4 dB min. Choose Nuwave for its slightly lower initial price and zero filter cost for 5 years.

$649Buy on Amazon

Bottom Line: Coway 400(G) is the better choice. It offers superior CADR at 416.

Key Differences

The most significant spec differences at a glance

416

Cadr Smoke

6% more

390.87

650

Coverage Sq Ft

6% more

610.73

Noise Level Db Min

30% less

31.4

Advantages

Where each product wins

Coway

Cadr Smoke: 6% higher (416.0 vs 390.87)
Coverage Sq Ft: 6% higher (650.0 vs 610.73)

Nuwave

Noise Level Db Min: 30% higher (22.0 vs 31.4)

Who Should Buy Which?

Find the right product for your needs

Buy Coway if...

COWAY Air Purifiers for

If you prioritize whisper-quiet operation and robust air purification for a large living space or bedroom, the Coway 400(G) is your ideal choice. Its impressive 22 dB minimum noise level makes it unobtrusive, while a 416.0 CADR smoke rating and 650 sq ft coverage ensure effective air cleaning. Buyers valuing Energy Star efficiency, a long 5-year warranty, and the removal of ultra-fine particles (0.01-micron) will find its premium price justified for superior long-term performance and peace of mind.

Buy Nuwave if...

Nuwave Whole House Air

The Nuwave Oxypure is perfect for cost-conscious buyers who want advanced purification without immediate recurring filter expenses. With zero filter replacement costs for the first 5 years and a slightly lower initial price, it offers great value. Its Wi-Fi connectivity and dual particle/odor sensors appeal to tech-savvy users desiring smart control and comprehensive air quality monitoring. It effectively covers 610.73 sq ft with a 390.87 CADR smoke rating, making it suitable for medium-to-large rooms where filter longevity and smart features are key priorities.

Spec Comparison

10 specs compared

Specification	Coway Air Purifiers for	Nuwave Whole House Air
Price	$649	$630
Rating	4.4(6.5k)	4.5(2.8k)
Cadr Smoke	416	390.87
Coverage Sq Ft	650	610.73
Noise Level db Min	22 dB	31.4 dB
Weight	3.05 lbs	—
Energy Star	Yes	—
Filter Type	True HEPA	True HEPA and Carbon
Smart Sensor	Yes	Yes
WiFi	—	Yes
Filter Cost Yearly	—	Free
Filter Life Months	—	12

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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.

Nuwave Whole House

Pros

Purifies 2934 sq ft in 60 mins (CADR 664.6 m 3/h).
Removes 100% of 0.09-micron airborne particles.
Eliminates ozone to less than 1 ppb.
Zero filter replacement cost for first 5 years.

Cons

High power consumption at 125W-128W.
Normal operating noise level not specified.
True HEPA/Carbon filter requires annual replacement.

Frequently Asked Questions

Common questions about this comparison

Which air purifier is quieter?

The Coway 400(G) is significantly quieter, operating at a minimum of 22 dB compared to the Nuwave Oxypure's 31.4 dB. This makes the Coway a better choice for bedrooms or quiet workspaces.

Which product covers a larger area more effectively?

The Coway 400(G) has a higher CADR Smoke of 416.0 and covers 650 sq ft, slightly more than the Nuwave Oxypure's 390.87 CADR Smoke and 610.73 sq ft. Coway purifies slightly faster for larger rooms.

What's the main difference in filter costs?

The Nuwave Oxypure boasts zero filter replacement costs for the first 5 years, a significant advantage. The Coway 400(G) uses True HEPA filters that require periodic replacement, incurring ongoing costs.

Which one is better for smart home integration?

The Nuwave Oxypure is Wi-Fi enabled, allowing for remote control and smart home integration. The Coway 400(G) features smart sensors and auto modes but lacks explicit Wi-Fi connectivity.