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The AirPro delivers a higher filtration grade for far less money: medical-grade HEPA 14 (99.995% at 0.3 microns, EN 1822) plus fully enclosed UV-C starting at $169, while the Alen BreatheSmart 75i is a premium H13-class True HEPA unit with a real-time air-quality sensor and lifetime warranty, typically priced several times higher and without a UV-C stage. Choose the AirPro for grade, UV-C, and value; choose the Alen if a large published coverage area and hands-off auto sensing justify the premium.

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Quick comparison

Competitor specifications above come from public marketing and vary by filter option and model revision; confirm current details with the manufacturer. The AirPro is a consumer wellness appliance, not a medical device or a treatment for any condition.

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Filtration grade: HEPA 14 vs. True HEPA

Alen’s filters are marketed in the True HEPA (H13) class, with some options advertised around 99.99% at 0.1 microns. The AirPro’s HEPA 14 filter is certified to 99.995% at 0.3 microns under EN 1822 — the standardized, most-penetrating-particle-size benchmark — and captures 99.9% down to 0.1 microns. When comparing, look for a stated EN 1822 grade rather than a marketing percentage at a hand-picked particle size. See HEPA 14 vs. True HEPA.

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Smart sensor vs. built-in UV-C

This is the real trade-off. The Alen leads on automation: its SmartSensor reads air quality and adjusts fan speed automatically, which is genuinely convenient. The AirPro leads on sterilization and simplicity: a fully enclosed UV-C (254 nm) stage neutralizes microbes on the filter, and you control it with manual fan speeds, a 2/4/6-hour Smart Timer, and a 25 dB Night Mode — no app or subscription required. Learn more in UV-C Sterilization and Smart Features.

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Which should you buy?

  • Choose the AirPro if you want the highest consumer filtration grade (HEPA 14), enclosed UV-C, quiet 25 dB nights, and a 60-day trial at a fraction of the price.
  • Choose the Alen BreatheSmart 75i if automatic air-quality sensing, a designer look, and a large single-room coverage rating are worth a significant premium.

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Bottom line

For most allergy, asthma, smoke, and mold buyers, the AirPro’s HEPA 14 + UV-C at $169 delivers a higher filtration grade and germicidal UV-C for far less than the Alen. If hands-off auto operation is your priority and budget is flexible, the BreatheSmart 75i is a premium True HEPA choice. SonoHealth backs the AirPro with a 60-day free trial and is a Google Top Quality Store (sitewide 4.7 stars, 673 verified reviews).
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