Our Verdict
BLUEAIR Air Purifier Wins

It excels with a 2163.2 CADR and 3385 sq ft coverage, vastly surpassing Alen's 1216 CADR and 1900 sq ft. Choose Alen if quiet bedroom operation and VOC filtration are primary, and extreme odor removal isn't a top concern.
Bottom Line: BLUEAIR Air Purifier is the better choice. It excels with a 2163.
Key Differences
The most significant spec differences at a glance
Cadr Smoke
44% lessCoverage Sq Ft
44% lessAdvantages
Where each product wins
BLUEAIR
- Cadr Smoke: 44% higher (1216 vs 2163.2)
- Coverage Sq Ft: 44% higher (1900 vs 3385.0)
Who Should Buy Which?
Find the right product for your needs
Buy Alen if...
Alen Air Purifier BreatheSmart
This purifier is ideal for individuals prioritizing quiet operation and comprehensive air purification in moderately large rooms like bedrooms, master suites, or open-plan living areas up to 1900 sq ft. If you suffer from allergies, or are sensitive to noise, and need robust filtration for dust, pet dander, VOCs, and smoke particles down to 0.1 micron, the Alen 45i's smart sensor and 'Fresh Filter + Carbon' system provide effective, discreet cleaning without disturbing your peace.
Buy BLUEAIR if...
BLUEAIR Air Purifier for
The Blueair Air Purifier is perfect for homeowners with very large open spaces, apartments, or commercial areas up to 3385 sq ft who demand top-tier air cleaning performance. If you frequently deal with heavy smoke, pet odors, or need rapid air turnover, its high smoke CADR of 2163.2 and OdorFence technology are unmatched. The smart WiFi features and its ability to double as a side table also appeal to tech-savvy users who value integrated design and powerful, expansive air quality management.
Spec Comparison
6 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $464 | $450 |
| Rating | 4.4(60) | 4.6(177) |
| Cadr Smoke | 1216 | 2163.2 |
| Coverage Sq Ft | 1900 | 3385 |
| Filter Type | HEPA | HEPASILENT |
| Model Number | 45i_V2 | — |
| Smart Sensor | Yes | Yes |
| WiFi | — | Yes |
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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
BLUEAIR Air Purifier
- Covers large areas up to 3385 sq ft.
- Removes 99.97% of particles down to 0.1 microns.
- High CADR of 2163.2 for smoke removal.
- OdorFence technology removes strong odors.
- Interactive display animations offer no utility.
- Requires recurring purchase of replacement filters.
- Optimal performance relies on WiFi connectivity.
Frequently Asked Questions
Common questions about this comparison
Which is better for very large rooms or homes with significant odor issues?
The BLUEAIR Air Purifier is superior, covering 3385 sq ft with a 2163.2 CADR for smoke. Its OdorFence technology specifically targets strong odors, whereas the Alen has limited absorption for heavy odors and covers 1900 sq ft.
What is the primary difference in air purification capacity between the two models?
The BLUEAIR has significantly higher capacity, covering 3385 sq ft with a smoke CADR of 2163.2. The Alen 45i covers 1900 sq ft and has a smoke CADR of 1216, making it suitable for smaller large rooms.
Which air purifier is a better choice for a bedroom setting?
The Alen BreatheSmart 45i is marketed for bedrooms and emphasizes quiet operation, which promotes sleep. While the BLUEAIR offers broader coverage, the Alen is designed with a specific focus on a calm bedroom environment.
Do both purifiers effectively remove small particles like dust and pet dander?
Yes, both are highly effective. The Alen captures particles down to 0.1 micron. The BLUEAIR removes 99.97% of particles down to 0.1 microns, ensuring comprehensive removal of dust, smoke, and pet hair.
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