Our Verdict
Nuwave Wins

It offers higher CADR (266.933) and coverage (417 sq ft) with zero yearly filter costs. Choose Alen for ultra-quiet operation and medical-grade 0.1 micron particle capture.
Bottom Line: Nuwave is the better choice. It offers higher CADR (266.
Key Differences
The most significant spec differences at a glance
Cadr Smoke
5% lessCoverage Sq Ft
5% lessAdvantages
Where each product wins
Nuwave
- Cadr Smoke: 5% higher (253.33 vs 266.933)
- Coverage Sq Ft: 5% higher (395.83 vs 417.0833)
Who Should Buy Which?
Find the right product for your needs
Buy Alen if...
Alen Air Purifier BreatheSmart
The Alen BreatheSmart 45i is ideal for individuals prioritizing a truly quiet environment, especially in bedrooms or home offices. If you need medical-grade filtration capturing particles down to 0.1 microns and potent odor neutralization, Alen is perfect. Its SmartSensor auto-adjusts, maintaining air quality discreetly. While filters require replacement, the focus on serene operation and precise particle capture makes it a top choice for those sensitive to noise or with specific air quality concerns requiring fine particle removal.
Buy Nuwave if...
Nuwave Forever Smart Air
The Nuwave Forever Smart Air Purifier suits budget-conscious users seeking long-term value, as its washable filters mean zero yearly replacement costs. If you desire robust air cleaning for larger effective areas (417 sq ft, CADR 266.933), coupled with modern conveniences like Wi-Fi connectivity for remote control, Nuwave is a strong contender. It's also excellent for those concerned about ozone levels, as it actively lowers them. This purifier offers powerful, connected, and economical air purification.
Spec Comparison
7 specs compared
| Specification | ![]() | ![]() |
|---|---|---|
| Price | $479 | $500 |
| Rating | 4.7(754) | 4.6(497) |
| Cadr Smoke | 253.33 | 266.93 |
| Coverage Sq Ft | 395.83 | 417.08 |
| Filter Type | HEPA Odor Filter | — |
| Smart Sensor | Yes | Yes |
| Energy Star | — | Yes |
| WiFi | — | Yes |
| Filter Cost Yearly | — | Free |
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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
Nuwave Forever Smart
- Washable filters eliminate recurring purchase costs.
- Captures 100% of particles down to 0.1 microns.
- Lowers ozone levels to 1 ppb.
- CADR smoke rating of 266.933 for effective cleaning.
- Effective coverage (5 ACH) is 417 sq ft, not 2,002 sq ft.
- Ozone removal filters are not washable or reusable.
Frequently Asked Questions
Common questions about this comparison
Which purifier is more cost-effective in the long run?
The Nuwave is more cost-effective due to its washable and reusable filters, eliminating yearly replacement costs. The Alen requires periodic filter purchases, adding to its long-term operational expense.
What's the main difference in air cleaning performance?
Nuwave has a slightly higher CADR smoke rating of 266.933 and covers 417 sq ft effectively. Alen has a CADR of 253.33 and covers 395 sq ft. Both effectively capture 0.1 micron particles.
Does either product offer smart home integration?
Yes, the Nuwave Forever Smart Air Purifier is Wi-Fi enabled, allowing for remote control and monitoring via an app. The Alen BreatheSmart 45i features a SmartSensor but lacks Wi-Fi connectivity.
Which is better for minimizing noise?
The Alen BreatheSmart 45i is advertised for its ultra-quiet operation, specifically aiding sleep with its pink noise feature. While Nuwave offers smart features, its noise levels are not highlighted.
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