Our Verdict
BLUEAIR Blue Pure 211i Max Wins
It offers superior CADR (410 vs 248) and massive coverage (3,048 sqft vs 387.5 sqft) with a low 23dB minimum noise. Choose Coway for its smart sensor, VOC reduction, and washable pre-filter benefits for smaller rooms.
Spec Comparison
6 specs compared
| Specification |  |  |
|---|---|---|
| Price | $245 | $315 |
| Rating | 4.5(12.5k) | 4.4(7.8k) |
| Cadr Smoke | 410 | 248 |
| Coverage Sq Ft | 3048 | 387.5 |
| Noise Level db Min | 23 dB | — |
| Filter Cost Yearly | — | — |
| Filter Type | — | True HEPA |
| Smart Sensor | — | Yes |
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Pros & Cons
Quick overview of strengths and weaknesses
Coway Air Purifiers
- Covers 387 sq ft for 5 air changes per hour.
- Removes 99.999% of 0.01-micron particles.
- Reduces 99% of volatile organic compounds.
- Automatically adjusts fan speed to air quality.
- Requires periodic replacement of internal filters.
- Advertised coverage exceeds typical 5 ACH standard.
Frequently Asked Questions
Common questions about this comparison
Which is better for large rooms and open floor plans?
The Blueair Blue Pure 211i Max is significantly better, cleaning up to 3,048 sqft in one hour. The Coway 250 effectively covers up to 387.5 sqft for 5 air changes per hour, making it suitable for smaller to medium-sized spaces.
What is the main difference in smoke purification capability?
The Blueair Blue Pure 211i Max has a significantly higher CADR for smoke at 410. The Coway 250 has a smoke CADR of 248. This means the Blueair purifies smoke much faster and in larger areas.
Which air purifier is quieter for sensitive environments?
The Blueair Blue Pure 211i Max has a minimum noise level of 23 dB, which is exceptionally quiet. The Coway 250's minimum noise level is not specified, but 23 dB is a very low baseline, suggesting Blueair excels in quiet operation.
Does either product offer smart features or advanced filtration details?
Yes, the Coway 250 includes a smart sensor to auto-adjust fan speed and claims to remove 99.999% of 0.01-micron particles and reduce 99% of VOCs. Blueair's model focuses on high coverage and CADR.
Which product might have lower long-term filter maintenance costs?
The Coway 250 features a washable pre-filter, which can help reduce recurring filter costs by extending the life of the internal True HEPA filter. Blueair's filter cost is not provided, but a washable pre-filter is generally a cost-saving benefit.
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