Back to products
Alen BreatheSmart 35i Air Purifier
Air Purifiers

Alen BreatheSmart 35i Air Purifier

by Alen

Premium air purifier with quiet operation, lifetime warranty, and powerful performance for large spaces.

Common Pros

  • Quiet operation(5)
  • Lifetime warranty(5)
  • Suitable for large spaces(2)
  • Excellent build quality(1)
  • Accurate auto mode(1)

Common Cons

  • High filter replacement cost(2)
  • Large footprint(2)
  • High initial price(1)
  • High long-term operating cost(1)
  • Ultra-wide grille(1)

Professional Reviews (13)

M

Moderncastle

Alen Breathesmart 75i Review - Air Quality Tests - Modern Castle

The Alen Breathesmart 75i is a solid choice for those needing coverage for a large area, with excellent purification per...

Read full review
97
M

Mindbodydad

Alen BreatheSmart 25i Air Purifier Review: Pros & Cons

The Alen BreatheSmart 25i is compact, quiet, and energy-efficient, ideal for small to medium rooms up to 800 square feet...

Read full review
88
H

Housefresh

Alen BreatheSmart 35i review - the best small air purifier?

If you can afford the $269 price tag, then the Alen 35i is one of the best small air purifiers I have reviewed, hands do...

Read full review
85
L

Livescience

Alen BreatheSmart 35i air purifier review - Live Science

The Alen BreatheSmart 35i easily lives up to its name, offering superb air-cleaning performance and some of the best sma...

Read full review
85
A

Airpurifiers

Alen 35i vs Levoit Core 400S Review - AirPurifiers.com

The Alen BreatheSmart 35i offers premium air purification with advanced monitoring, ultra-quiet operation, and customiza...

Read full review
85
Y

Yawnder

Alen BreatheSmart 35i Review 2025: Quiet, Powerful Air Purifier for ...

The Alen BreatheSmart 35i delivers clean air with a calm sound profile and a design that suits real homes.

Read full review
85
T

Techradar

Alen BreatheSmart 75i review: a powerful air purifier for large spaces

The Alen BreatheSmart 75i air purifier stands out for having the power to tackle air quality in large spaces.

Read full review
85
T

Techgearlab

Alen BreatheSmart 75i Review | Tested & Rated - TechGearLab

The Alen BreatheSmart 75i is effective in larger spaces, performing exceptionally well in air cleaning tests and handlin...

Read full review
83
B

Bestairpurifierreviews

Alen BreatheSmart Air Purifier Review

Alen BreatheSmart is an air purifier which can purify the air of large rooms measuring up to 1,100 square feet or larger...

Read full review
82
A

Air-purifier-power

Alen Breathesmart Air Purifier Review

Alen has made a pretty good attempt at building a machine to challenge Blueair in the lower-premium air purifier segment...

Read full review
78
C

Consumerreports

Alen BreatheSmart 35i Fresh (500sqft) + White Air Purifier Review

The Alen BreatheSmart 35i Fresh (500sqft) + White is a room air purifier designed for 500 sq ft spaces with multiple fea...

Read full review
75
B

Breathequality

Alen BreatheSmart Classic Air Purifier: Trusted Review & Specs

The Alen BreatheSmart Classic is a high-end air purifier with a Lifetime Warranty, large room coverage, and quiet operat...

Read full review
75
N

Newsbreak

Alen BreatheSmart 35i Air Purifier review - NewsBreak

The Alen BreatheSmart 35i Air Purifier seems sturdy and decently built, but it took much longer than expected to clean t...

Read full review
72

Score Breakdown

83
Excellent
Based on 13 professional reviews

Score by Source

Moderncastle
97
Mindbodydad
88
Housefresh
85
Livescience
85
Airpurifiers
85
Yawnder
85
Techradar
85
Techgearlab
83
Bestairpurifierreviews
82
Air-purifier-power
78
Consumerreports
75
Breathequality
75
Newsbreak
72