Scored using Air Purifiers Methodology v1.0
Air Purifiers Methodology v1.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Air Purifiers Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
Explore Air Purifiers Methodology v1.0

Alen BreatheSmart 75i Review | 45 Data compared

Avg. price:~£620Max. CADR:595 m³/hMaximum room area:260.1 m²Maximum noise level:49 dBHEPA filter:yesWeight:12.25 kg

Alen BreatheSmart 75i Review: Compare 45 technical specifications and user reviews to see how this product ranks in the Air Purifiers category and whether it is worth buying.

Alen BreatheSmart 75i
8.3/10

Overall score

Score
8.3/ 10
✕
What it is
An overall evaluation of products in the Air Purifiers category, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best products in the Air Purifiers category.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

80%

8.2

Technical score

20%

8.6

User score

★Better than 96% of air purifiers
7.2

Value for money

Value for money
7.2/ 10
✕
What it is
An indicator that combines the overall score of products in the Air Purifiers category with their prices.
When it matters
When you are comparing products in the Air Purifiers category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

8.3

Overall score

30%

4.8

Price

â–¼Worse than 73%
8.2

Technical score

Technical score
8.2/ 10
✕
What it is
An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

50%

8.7

Performance

40%

8.6

Features

10%

4.2

Design

★Better than 95%
8.6

User score

User score
8.6/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Air Purifiers category.
When it matters
When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

9.0

User ratings

30%

7.7

Number of reviews

Based on ratings from across the web.
â–²Better than 75%
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Best prices
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Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.
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Technical Specifications of air purifier Alen BreatheSmart 75i

Technical score
Technical score
8.2/ 10
✕
What it is
An assessment of technical performance for products in the Air Purifiers category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Air Purifiers category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

50%

8.7

Performance

40%

8.6

Features

10%

4.2

Design

8.2
User score
User score
8.6/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Air Purifiers category.
When it matters
When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.
Score distribution
â–¼
<55-66-77-88-99-10
Score components

70%

9.0

User ratings

30%

7.7

Number of reviews

Based on ratings from across the web.
8.6
Popularity
Popularity
7.7/ 10
✕
What it is
An indicator based on the number of reviews received by products in the Air Purifiers category.
When it matters
When you prefer products in the Air Purifiers category that have been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
Popularity:
Alen BreatheSmart 75i has a popularity score of 7.7 points, which is higher than 72.7% of products in this category.
7.7
Value for money
Value for money
7.2/ 10
✕
What it is
An indicator that combines the overall score of products in the Air Purifiers category with their prices.
When it matters
When you are comparing products in the Air Purifiers category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
Score components:

70%

8.3

Overall score

30%

4.8

Price

7.2
Power
45 W
This air purifier has a power output of 45 W, which is higher than that of 63% of air purifiers and the same as that of 3.9% of air purifiers.
Max. CADR
595 m³/h
This air purifier delivers a CADR of 595 m³/h, which is higher than that of 95.7% of air purifiers.
Maximum room area
260.1 m²
This air purifier covers up to 260.1 m², which is larger than 99.4% of air purifiers.
N. of speeds
5
This air purifier offers 5 fan speeds, which is more than 81.6% of air purifiers and the same as 9.5% of air purifiers.
Maximum noise level
49 dB
This air purifier reaches 49 dB at maximum speed, which is quieter than 73.8% of air purifiers and the same as 7.3% of air purifiers.
Show more
Air quality indicator
yes
This air purifier has an air-quality indicator. This feature is present on 65.4% of air purifiers.
Continuous purification
yes
This air purifier supports continuous purification. This feature is present on 86.3% of air purifiers.
Auto mode
yes
This air purifier has auto mode. This feature is present on 67% of air purifiers.
Timer
yes
This air purifier has a timer. This feature is present on 75% of air purifiers.
Maximum timer
12 hours
This air purifier features a maximum timer of 12 hours, which is longer than that of 67.2% of air purifiers and the same as that of 17.2% of air purifiers.
Show more
Color
white
Material
plastic
Display
no
This air purifier does not have a display. This feature is present on 51.1% of air purifiers.
Display position
N/A
Control type
touch, app
Show more

Alen BreatheSmart 75i vs the average air purifier

246810TotalPerformanceFeaturesDesign
  • 2.48x higher CADR
    This air purifier provides a higher clean air delivery rate than the average air purifier (595 m³/h vs 240 m³/h).
    595 m³/h vs 240 m³/h
  • 211.1 m² larger room area
    This air purifier covers a larger room area than the average air purifier (260.1 m² vs 49 m²).
    260.1 m² vs 49 m²
  • 2 more fan speeds
    This air purifier provides more fan speed settings than the average air purifier (5 vs 3).
    5 vs 3
  • Supports Wi‑Fi
    This air purifier supports Wi‑Fi; the average air purifier does not.
  • Has a child lock
    This air purifier has a child lock; the average air purifier does not.
  • 4 dB lower maximum noise level
    This air purifier runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).
    49 dB vs 53 dB
  • 0.02 % percentage points higher bacteria elimination
    This air purifier achieves higher certified bacteria elimination than the average air purifier (100 % vs 99.97 %).
    The claim applies to E. coli and Staphylococcus on the antimicrobial filter layer.
    99.99 % vs 99.97 %
  • Has an ionizer
    This air purifier has an ionizer; the average air purifier does not.
  • 6.8% higher user score
    User score
    8.6/ 10
    ✕
    What it is
    A rating that combines user reviews with the total review volume for products in the Air Purifiers category.
    When it matters
    When you want to know how products in the Air Purifiers category perform in everyday use and how reliable owners find them over time.
    Score distribution
    â–¼
    â–¼
    <55-66-77-88-99-10
    Alen BreatheSmart 75i
    the average air purifier
    Alen BreatheSmart 75i has a higher user score than the average air purifier (8.60 vs 8.048).
    8.6 vs 8.05
  • 15.2% more popular
    Alen BreatheSmart 75i is more popular than the average air purifier (7.68 vs 6.7).
    7.68 vs 6.67
  • 2.48x higher CADR
    This air purifier provides a higher clean air delivery rate than the average air purifier (595 m³/h vs 240 m³/h).
    595 m³/h vs 240 m³/h
  • 211.1 m² larger room area
    This air purifier covers a larger room area than the average air purifier (260.1 m² vs 49 m²).
    260.1 m² vs 49 m²
  • 2 more fan speeds
    This air purifier provides more fan speed settings than the average air purifier (5 vs 3).
    5 vs 3
  • 4 dB lower maximum noise level
    This air purifier runs quieter at maximum speed than the average air purifier (49 dB vs 53 dB).
    49 dB vs 53 dB
  • 7.5 W higher power
    This air purifier has a higher power output than the average air purifier (45 W vs 37.5 W).
    45 W vs 37.5 W
  • Supports Wi‑Fi
    This air purifier supports Wi‑Fi; the average air purifier does not.
  • Has a child lock
    This air purifier has a child lock; the average air purifier does not.
  • 0.02 % percentage points higher bacteria elimination
    This air purifier achieves higher certified bacteria elimination than the average air purifier (100 % vs 99.97 %).
    The claim applies to E. coli and Staphylococcus on the antimicrobial filter layer.
    99.99 % vs 99.97 %
  • Has an ionizer
    This air purifier has an ionizer; the average air purifier does not.
  • 4 hours longer timer
    This air purifier offers a longer timer duration than the average air purifier (12 hours vs 8 hours).
    12 hours vs 8 hours
  • 0.33 m longer power cord
    This air purifier features a longer power cord than the average air purifier (2.1 m vs 1.8 m).
    2.13 m vs 1.8 m
  • Has wheels
    This air purifier has wheels; the average air purifier does not.
    Includes two rear wheels for tilt-and-roll movement.
  • Has a handle
    This air purifier has a handle; the average air purifier does not.
  • No washable prefilter
    This air purifier does not have a washable prefilter; the average air purifier does.
  • 2.68x higher weight
    This air purifier is heavier than the average air purifier (12.3 kg vs 4.57 kg).
    12.25 kg vs 4.57 kg
  • No display
    This air purifier does not have a display; the average air purifier does.
  • 19.69 cm wider width
    This air purifier is wider than the average air purifier (47 cm vs 27.3 cm).
    46.99 cm vs 27.3 cm
  • 7.21 cm greater depth
    This air purifier is deeper than the average air purifier (29.2 cm vs 22 cm).
    29.21 cm vs 22 cm
  • 18.58 cm taller height
    This air purifier is taller than the average air purifier (68.6 cm vs 50 cm).
    68.58 cm vs 50 cm
  • 4.43x more expensive
    Alen BreatheSmart 75i is more expensive than the average air purifier (£620 vs £140).
    £620 vs £140
  • 4% worse value for money
    Alen BreatheSmart 75i offers worse value for money than the average air purifier (7.23 vs 7.5).
    7.23 vs 7.52
  • 4.43x more expensive
    Alen BreatheSmart 75i is more expensive than the average air purifier (£620 vs £140).
    £620 vs £140
  • 4% worse value for money
    Alen BreatheSmart 75i offers worse value for money than the average air purifier (7.23 vs 7.5).
    7.23 vs 7.52
  • No washable prefilter
    This air purifier does not have a washable prefilter; the average air purifier does.
  • 2.68x higher weight
    This air purifier is heavier than the average air purifier (12.3 kg vs 4.57 kg).
    12.25 kg vs 4.57 kg
  • No display
    This air purifier does not have a display; the average air purifier does.
  • 19.69 cm wider width
    This air purifier is wider than the average air purifier (47 cm vs 27.3 cm).
    46.99 cm vs 27.3 cm
  • 7.21 cm greater depth
    This air purifier is deeper than the average air purifier (29.2 cm vs 22 cm).
    29.21 cm vs 22 cm
  • 18.58 cm taller height
    This air purifier is taller than the average air purifier (68.6 cm vs 50 cm).
    68.58 cm vs 50 cm
  • 3.07x larger external volume
    This air purifier has a larger overall volume than the average air purifier (94131.4 cm³ vs 30700.8 cm³).
    94,131.392382 cm³ vs 30,700.8 cm³

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

Expert reviews

In-depth analysis and verdict from leading tech publications

B
breathequality.com
02/07/2026
Summary of the review
H
housefresh.com
17/12/2025
Summary of the review
T
techradar.com
05/04/2024
Summary of the review
T
techhive.com
19/02/2024
Summary of the review
T
techhive.com
19/04/2023
Summary of the review
T
techgearlab.com
04/05/2022
Summary of the review
T
techradar.com
05/04/2024
Summary of the review

Third-party reviews

Based on ratings from across the web.
Reviews last updated: August 2026 · How we calculate this

What we like about Alen BreatheSmart 75i

  • High cleaning power and effectiveness for large spaces
  • Whisper-quiet operation on lower settings
  • Accurate, low-maintenance laser particle sensor
  • High-quality build and durability
  • Excellent capacity for smoke, dust, and odor/VOC removal (especially with 'Fresh' filters packed with 3.6 lbs of activated carbon)
  • Lifetime warranty offered if using branded filter replacements
  • Energy-efficient and cost-effective to run over time

What we don't like about Alen BreatheSmart 75i

  • High initial purchase and ongoing filter replacement costs
  • Bulky unit footprint takes up significant physical space
  • Companion app is bare-bones and lacks advanced customization settings (like adjusting auto-mode sensitivity)
  • Boxy, somewhat plain aesthetic

Verdict

The Alen BreatheSmart 75i is a premium air purifier for spaces up to 1,300 sq ft, offering a 351 CFM CADR, medical-grade H13 HEPA filtration, laser-based automatic speed adjustment, and dual-band Wi-Fi connectivity. Key pros include an exceptionally quiet 25-49 dB noise profile, low 45W energy consumption, and a lifetime warranty with filter subscription. Drawbacks include a high $749 price point, expensive $99-$130 annual filters, a bulky design, and automation that primarily reacts to particulates rather than TVOCs.

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