Alen BreatheSmart 45i
Air Purifiers

BreatheSmart 45i

Alen

Released Feb 1, 2024 · Analysis updated Mar 5, 2026

The Alen BreatheSmart 45i scores 90/100 based on 4 expert reviews in the air purifiers category. Coverage includes reviews from Moderncastle, Airpurifierfirst, Techradar, and Housefresh.

Critic Score

What's this?
90

based on 4 expert reviews

ModerncastleAirpurifierfirstTechradarHousefresh

Low confidence · only 4 reviews

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Pros

  • Excellent purification performance(3)
  • Lifetime warranty(2)
  • Quiet operation(2)

Cons

  • Requires filter subscription for lifetime warranty(2)

4 Expert Reviews

96
Feb 16, 2024

The Alen Breathesmart 45i is an excellent mid-sized air purifier for any medium to large-sized room with its 800 sq. ft. coverage.

95
Jul 13, 2024

The Alen BreatheSmart FLEX is an excellent air purifier that has met all my expectations with extraordinary filtration technology, amazing performance, and fantastic scores on all tests.

85
Apr 11, 2024

The Alen BreatheSmart 45i air purifier is quick to detect drops in air quality and efficient at cleaning the air of small and medium-sized spaces.

82
Dec 17, 2025

The Alen BreatheSmart 45i offers solid performance with medical-grade filtration and quiet operation, though it comes at a premium price.