Our Verdict
Alen BreatheSmart 45i Wins
It offers superior air purification with a CADR smoke of 1216 and covers 1900 sq ft, far exceeding Coway's 328 CADR and 1560 sq ft. Choose Coway for specific 22 dB minimum noise levels.
Spec Comparison
9 specs compared
| Specification |  |  |
|---|---|---|
| Price | $464 | $649 |
| Rating | 4.4(60) | 4.4(6.5k) |
| Cadr Smoke | 1216 | 328 |
| Coverage Sq Ft | 1900 | 1560 |
| Noise Level db Min | — | 22 dB |
| Filter Type | HEPA | True HEPA |
| Model Number | 45i_V2 | — |
| Smart Sensor | Yes | Yes |
| Weight | — | 24.7 lbs |
| Energy Star | — | Yes |
| Noise Level db Max | — | 52 dB |
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Pros & Cons
Quick overview of strengths and weaknesses
Alen Air Purifier
- Covers up to 1900 sq ft hourly
- Captures particles down to 0.1 micron
- Filters VOCs, odors, chemicals
- Quiet operation promotes sleep
- Limited absorption for heavy odors/chemicals
- Requires periodic filter replacement
Coway AP-2015F Airmega
- Covers 1,560 sq. ft. in 30 minutes.
- Filters 99.999% of 0.01-micron airborne particles.
- Reduces 99% of VOCs and odors effectively.
- Automatically adjusts fan speed to optimize air quality.
- Maximum noise level reaches 52 dB.
- Requires periodic filter replacement and cleaning.
- Unit weighs 24.7 lbs.
Frequently Asked Questions
Common questions about this comparison
Which air purifier is better for large rooms with significant smoke or dust issues?
The Alen BreatheSmart 45i is superior for large rooms needing high performance. It covers 1900 sq ft and has a CADR smoke of 1216, significantly higher than the Coway Airmega 400's 1560 sq ft coverage and 328 CADR smoke.
What's the main difference in smoke purification performance (CADR smoke) between the two?
The Alen BreatheSmart 45i has a much higher CADR smoke of 1216, indicating superior smoke removal, compared to the Coway Airmega 400's CADR smoke of 328. This means Alen cleans smoky air much faster.
Which unit offers better overall coverage for larger spaces?
The Alen BreatheSmart 45i offers greater coverage, purifying air in up to 1900 sq ft. The Coway Airmega 400 covers 1560 sq ft. For maximum area coverage, Alen is the better choice.
Which purifier is quieter during operation?
The Coway Airmega 400 specifies a minimum noise level of 22 dB, whereas Alen lists "quiet operation" as a pro without a specific dB. Coway provides a measurable low noise floor, though its max is 52 dB.
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