Our Verdict
Coway 250 Wins
It offers a higher CADR for smoke (248) and covers 387.5 sq ft at 5 ACH, while Dyson covers 290 sq ft with an unknown CADR. Choose Dyson only if other unlisted features, like design, are more important.
Spec Comparison
6 specs compared
| Specification |  |  |
|---|---|---|
| Price | $315 | $400 |
| Rating | 4.4(7.8k) | 4.4(170) |
| Cadr Smoke | 248 | — |
| Coverage Sq Ft | 387.5 | 290 |
| Noise Level db Min | — | — |
| Filter Type | True HEPA | — |
| Smart Sensor | Yes | — |
| Filter Cost Yearly | — | — |
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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?
Coway 250 is better for larger rooms, covering 387.5 sq ft effectively for 5 air changes per hour, compared to Dyson's 290 sq ft. This means it can purify air in bigger spaces more efficiently.
What's the main difference in air purification power (CADR)?
The Coway 250 has a specified CADR for smoke of 248. The Dyson Purifier Cool Autoreact TP7A does not provide a CADR rating, making it difficult to directly compare their purification speeds.
Which has better filtration capabilities?
Coway 250 uses a True HEPA filter and removes 99.999% of 0.01-micron particles, plus 99% of VOCs. Dyson's specific filtration capabilities are not detailed in the provided information, making Coway's performance more transparent.
Are there differences in filter maintenance costs?
Coway 250 features a washable pre-filter, which can reduce recurring costs. While it still requires periodic replacement of internal filters, Dyson's filter replacement details and costs are not provided, preventing a direct comparison.
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