Our Verdict
Alen BreatheSmart 45i Wins

Superior smoke CADR of 253.33 vs Dyson's 76 makes it purer. Choose Dyson for combined air purification and cooling with smart app control.
Bottom Line: Alen BreatheSmart 45i is the better choice. Superior smoke CADR of 253.
Key Differences
The most significant spec differences at a glance
Cadr Smoke
233% moreCoverage Sq Ft
1% lessAdvantages
Where each product wins
Alen
- Cadr Smoke: 233% higher (253.33 vs 76)
Dyson
- Coverage Sq Ft: 1% higher (395.83 vs 400)
Who Should Buy Which?
Find the right product for your needs
Buy Alen if...
Alen Air Purifier BreatheSmart
If you prioritize exceptional air purification, especially for mitigating allergies, smoke, or strong household odors, the Alen BreatheSmart 45i is your ideal choice. With its high CADR smoke rating of 253.33 and a medical-grade HEPA filter that captures particles down to 0.1 microns, it ensures rapid and thorough air cleaning. It's perfect for those who need ultra-quiet operation for better sleep in bedrooms or home offices, valuing pure, clean air above multi-functional cooling features.
Buy Dyson if...
Dyson Purifier Cool PC1,
The Dyson Purifier Cool PC1 is ideal for individuals seeking a dual-function device that effectively purifies air while also providing a powerful personal cooling fan. If you highly value smart features like WiFi-enabled app control, voice command compatibility, remote air quality monitoring, and a sleek, modern design, this is your best option. It’s perfect for living rooms or personal spaces up to 400 sq ft where both superior air filtration and comfortable airflow are desired.
Spec Comparison
6 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $479 | $488 |
| Rating | 4.7(754) | 4.4(141) |
| Cadr Smoke | 253.33 | 76 |
| Coverage Sq Ft | 395.83 | 400 |
| Filter Type | HEPA Odor Filter | HEPA H13 |
| Smart Sensor | Yes | Yes |
| Model Number | — | TP11 |
| WiFi | — | Yes |
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Pros & Cons
Quick overview of strengths and weaknesses
Alen Air Purifier
- Neutralizes strong household odors
- Medical-grade filter captures 0.1 micron particles
- SmartSensor auto-adjusts fan speed
- High CADR smoke rating (253.33)
- Effective coverage (395 sq ft) less than advertised
- Pink noise feature may not be preferred by all users
- Requires periodic filter replacement
Dyson Purifier Cool
- Captures 99.97% particles down to 0.3 microns.
- Activated carbon filter removes gases and odors.
- HEPA H13 fully sealed filtration system.
- Projects 76 gallons/sec airflow for cooling.
- Low smoke CADR of 76 for 400 sq ft coverage.
- Requires extended operation for full room purification.
Frequently Asked Questions
Common questions about this comparison
Which is better for comprehensive air purification?
The Alen BreatheSmart 45i offers significantly better purification with a smoke CADR of 253.33, compared to Dyson's 76. It captures smaller particles (0.1 vs 0.3 microns) and neutralizes strong odors more effectively, making it superior for dedicated air cleaning.
What's the main functional difference between these two purifiers?
The Alen 45i is a dedicated air purifier, excelling in rapid air cleaning and odor removal. The Dyson Purifier Cool PC1 combines air purification with a powerful fan, projecting 76 gallons/sec airflow for cooling, offering a dual-purpose solution.
Is the price difference worth it?
The Alen 45i is slightly cheaper at $479.0 and provides superior purification performance. The Dyson PC1 at $487.99 is worth it if you prioritize a combined purifier and cooling fan with advanced app control, voice commands, and remote air quality monitoring.
Which has better smart features?
Both have smart sensors, but the Dyson PC1 excels with WiFi connectivity, app control, voice control, and remote air quality monitoring. The Alen 45i's SmartSensor primarily auto-adjusts fan speed based on detected particles.
Which is better for larger rooms or faster cleaning?
The Alen BreatheSmart 45i is better for faster cleaning in rooms up to 395.83 sq ft due to its much higher CADR smoke rating (253.33). Dyson's lower CADR (76) for similar coverage means slower purification.
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