If you want better ease of use
Choose Coway Airmega 50. It scores 4.8 vs 4.3 for ease of use, with a 3.6 overall score.
Alen BreatheSmart 75i Air Purifier Review
Bottom Line
Choose the Alen BreatheSmart 75i for quiet, powerful cleaning in large rooms. Skip it if price, replacement filters, bulky size, or app polish matter most.
Best for
Best for people who need serious air cleaning in large bedrooms, open living areas, offices, basements, or smoke/allergy-prone homes and want quiet low-speed operation.
Not for
Not ideal for small rooms, tight budgets, buyers who dislike bulky appliances, or anyone who wants the cheapest CADR per dollar or a flawless app experience.
Verdict
The Alen BreatheSmart 75i earns broad support for large-room purification, low-speed quietness, easy setup, and visible air-quality feedback. Expert tests and many customers describe meaningful reductions in dust, smoke, odors, allergens, and stale air, with auto mode and long filter life adding convenience. The tradeoff is cost and scale: it is expensive to buy, replacement filters can be costly, and the cabinet is too large for small rooms. App feedback is useful but uneven, and customer reports show occasional defects, bad odors, poor arrivals, or support frustrations. Overall, the evidence favors it for serious air cleaning when budget and space allow.
Feature Scorecards
Summary
44 reviewed features-
Very positive 4.5-5.06 (14%)
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Positive 3.5-4.423 (52%)
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Neutral 2.5-3.410 (23%)
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Negative 1.5-2.45 (11%)
Pros
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Design is generally praised for sleek looks and color/panel options despite the unit’s bulk.
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Setup and everyday operation are usually described as easy or simple, with limited exceptions.
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Most reviews report strong air-cleaning performance, though a minority of customers saw little benefit or defects.
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Build quality is mostly positive in expert coverage and customer impressions.
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App control is useful for remote access and data, but feedback is mixed on discoverability, intuitiveness, and connection reliability.
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Expert reviews cite strong CADR/CFM numbers that support the large-room use case.
Cons
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Filter replacement cost/subscription requirements are one of the recurring negatives.
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Listing accuracy is mixed, with “as advertised” praise and a mold-removal complaint.
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Reliability is mixed: some units ran for years, while others shut off, failed, or would not turn off.
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Handle and wheels help move the large unit, but wheel placement is not universally liked.
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Indicator lights are valued for quick air-quality feedback and night-light control, with some false-reading complaints.
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Real-time monitoring is a useful feature through lights, sensors, app readings, and graphs, though not always trusted.
Compared With Category Average
Compared with other Air Purifiers, this product is above average in app connectivity, control placement, room temperature mixing, near average in ease of use, display readability, below average in real-time air quality monitoring, indicator lights, pet dander removal.
Comparison summary
43 compared features-
Above average 0.4+ pts higher5 (12%)
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Same as average within 0.3 pts21 (49%)
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Below average 0.4+ pts lower17 (40%)
Largest category differences
| Attribute | This product | Category average | Difference |
|---|---|---|---|
| real-time air quality monitoring | 1.8 | 3.9 | -2.1 |
| indicator lights | 1.8 | 3.9 | -2.1 |
| pet dander removal | 3.0 | 4.5 | -1.5 |
| handle design | 1.8 | 3.4 | -1.6 |
| filter replacement cost | 1.8 | 3.3 | -1.5 |
| app connectivity | 4.0 | 3.2 | +0.8 |
| allergen reduction | 3.8 | 4.6 | -0.8 |
| dust removal | 3.4 | 4.3 | -0.9 |
Consider This Instead
If you want better handle design
Choose AirDoctor AD3000. It scores 5.0 vs 1.8 for handle design, with a 4.0 overall score.
If you want better real-time air quality monitoring
Choose Shark MAX HP202. It scores 5.0 vs 1.8 for real-time air quality monitoring, with a 4.2 overall score.
If you want better value for money
Choose HEAPETS P358. It scores 4.8 vs 3.2 for value for money, with a 4.1 overall score.
Compared in Reviews
Products reviewers directly compared with this model, grouped into quick takeaways.
- Cheaper: price and CADR value The review says the 75i is significantly more expensive than Coway Airmega equivalents.
- Compared: price and features TechRadar compares the 75i with Dyson’s formaldehyde model on price and features.
- Cheaper: price and CADR value The review says the 75i is significantly more expensive than the Levoit Core 600S.
FAQ
Is the Alen BreatheSmart 75i good for large rooms?
Yes. Expert and customer evidence repeatedly supports large-room use, including open living areas, basements, offices, and large bedrooms.
Is it quiet enough for bedrooms?
Most reviews say it is very quiet or nearly inaudible on low settings, and the lights can be turned off for sleep. Higher speeds can be more noticeable.
Does it help with allergies and asthma symptoms?
Many customers report easier breathing, fewer allergy symptoms, less congestion, and better sleep, though a few users did not feel symptom relief.
Are replacement filters expensive?
Yes, filter cost is a recurring caveat. Several reviews note carbon or specialty filters cost more, and warranty benefits may require a filter subscription.
How useful is the app?
The app can provide remote control, sensor data, graphs, and scheduling in some versions, but reviewers also describe it as hidden, simple, or not intuitive.
Does it remove odors and smoke?
Evidence is generally positive for cooking odors, stale smoke, wildfire smoke, and freshness, especially with carbon-focused filters. Some customers complained of plastic or filter smells.
Sample Expert Reviews We Analyzed
These are a few of the reviews included in our analysis.
Video Reviews
YouTube - AppMyHome
- Review score
- 4.0
YouTube - Essential Home and Garden
- Review score
- 4.1
YouTube - HouseFresh
- Review score
- 4.1
Article Reviews
medgrade.org
- Review score
- 3.9
techradar.com
- Review score
- 4.0
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