OVERALL
ALTERNATIVES
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Scored using Air Purifiers Methodology v1.0
Air Purifiers Methodology v1.0
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Products in this category are scored under Frontum Air Purifiers Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
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Duomishu SY-702 Review | 45 Data compared

Avg. price:~£20Max. CADR:100 m³/hMaximum room area:15 m²Maximum noise level:44 dBHEPA filter:yesWeight:0.9 kg

Duomishu SY-702 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.

Duomishu SY-702
5.2/10

Overall score

Score
5.2/ 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
â–¼ Worse than 98% of models
Score components

80%

4.7

Technical score

20%

7.5

User score

â–¼Worse than 98% of air purifiers
6.7

Value for money

Value for money
6.7/ 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
â–¼ Worse than 93% of models
Score components

70%

5.2

Overall score

30%

10

Price

â–¼Worse than 93%
4.7

Technical score

Technical score
4.7/ 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
â–¼ Worse than 99% of models
Score components

50%

3.0

Performance

40%

6.0

Features

10%

7.5

Design

â–¼Worse than 99%
7.5

User score

User score
7.5/ 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
â–¼ Worse than 85% of models
Score components

70%

7.6

User ratings

30%

7.3

Number of reviews

Based on 683 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
â–¼Worse than 85%
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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 Duomishu SY-702

Technical score
Technical score
4.7/ 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
â–¼ Worse than 99% of models
Score components:

50%

3.0

Performance

40%

6.0

Features

10%

7.5

Design

4.7
User score
User score
7.5/ 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
â–¼ Worse than 85% of models
Score components

70%

7.6

User ratings

30%

7.3

Number of reviews

Based on 683 buyer reviews from online shops.
Read buyer reviews on Amazon →
How we calculate this
User ratings – average star rating across all shop listings, weighted by how many reviews each has, on a 1–10 scale.
Number of reviews – how many buyer reviews the product has, on a logarithmic scale; the 8% most-reviewed models in the category get 10.
7.5
Popularity
Popularity
7.3/ 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
â–² Better than 60% of models
Popularity:
Duomishu SY-702 has a popularity score of 7.3 points, which is higher than 59.6% of products in this category.
7.3
Value for money
Value for money
6.7/ 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
â–¼ Worse than 93% of models
Score components:

70%

5.2

Overall score

30%

10

Price

6.7
Power
1.2 W
Market range: <10 W – >68 W
This air purifier has a power output of 1.2 W, which is lower than that of 99.5% of air purifiers and the same as that of 0.6% of air purifiers.
Max. CADR
100 m³/h
Market range: <100 m³/h – >515 m³/h
This air purifier delivers a CADR of 100 m³/h, which is lower than that of 87% of air purifiers and the same as that of 3.7% of air purifiers.
Maximum room area
15 m²
Market range: <20 m² – >130 m²
This air purifier covers up to 15 m², which is smaller than 92.5% of air purifiers and the same as 1.2% of air purifiers.
N. of speeds
2
Market range: <3 – >5
This air purifier offers 2 fan speeds, which is fewer than 93.9% of air purifiers and the same as 4.5% of air purifiers.
Maximum noise level
44 dB
Market range: <32 dB – >61 dB
This air purifier reaches 44 dB at maximum speed, which is quieter than 89.6% of air purifiers and the same as 1.2% of air purifiers.
Show more
Air quality indicator
no
This air purifier does not have an air-quality indicator. This feature is present on 65.4% of air purifiers.
Continuous purification
no
This air purifier does not support continuous purification. This feature is present on 86.3% of air purifiers.
Auto mode
no
This air purifier does not have auto mode. This feature is present on 67% of air purifiers.
Timer
no
This air purifier does not have a timer. This feature is present on 75% of air purifiers.
Maximum timer
N/A
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
buttons
Show more

Duomishu SY-702 vs the average air purifier

246810TotalPerformanceFeaturesDesign
  • 9 dB lower maximum noise level
    This air purifier runs quieter at maximum speed than the average air purifier (44 dB vs 53 dB).
    44 dB vs 53 dB
  • 80.3% lower weight
    This air purifier is lighter than the average air purifier (0.9 kg vs 4.57 kg).
    0.9 kg vs 4.57 kg
  • Supports 360° purification
    This air purifier supports 360° purification; the average air purifier does not.
  • Has an ionizer
    This air purifier has an ionizer; the average air purifier does not.
  • 12.5 cm narrower width
    This air purifier is narrower than the average air purifier (14.8 cm vs 27.3 cm).
    14.8 cm vs 27.3 cm
  • 7.2 cm shallower depth
    This air purifier is shallower than the average air purifier (14.8 cm vs 22 cm).
    14.8 cm vs 22 cm
  • 28 cm shorter height
    This air purifier has a lower height than the average air purifier (22 cm vs 50 cm).
    22 cm vs 50 cm
  • 7x cheaper
    Duomishu SY-702 is cheaper than the average air purifier (£20 vs £140).
    £20 vs £140
  • 7x cheaper
    Duomishu SY-702 is cheaper than the average air purifier (£20 vs £140).
    £20 vs £140
  • 9.2% more popular
    Duomishu SY-702 is more popular than the average air purifier (7.28 vs 6.7).
    7.28 vs 6.67
  • 9 dB lower maximum noise level
    This air purifier runs quieter at maximum speed than the average air purifier (44 dB vs 53 dB).
    44 dB vs 53 dB
  • Supports 360° purification
    This air purifier supports 360° purification; the average air purifier does not.
  • Has an ionizer
    This air purifier has an ionizer; the average air purifier does not.
  • 80.3% lower weight
    This air purifier is lighter than the average air purifier (0.9 kg vs 4.57 kg).
    0.9 kg vs 4.57 kg
  • 12.5 cm narrower width
    This air purifier is narrower than the average air purifier (14.8 cm vs 27.3 cm).
    14.8 cm vs 27.3 cm
  • 7.2 cm shallower depth
    This air purifier is shallower than the average air purifier (14.8 cm vs 22 cm).
    14.8 cm vs 22 cm
  • 28 cm shorter height
    This air purifier has a lower height than the average air purifier (22 cm vs 50 cm).
    22 cm vs 50 cm
  • 58.3% lower CADR
    This air purifier provides a lower clean air delivery rate than the average air purifier (100 m³/h vs 240 m³/h).
    100 m³/h vs 240 m³/h
  • 34 m² smaller room area
    This air purifier covers a smaller room area than the average air purifier (15 m² vs 49 m²).
    15 m² vs 49 m²
  • No air-quality indicator
    This air purifier does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    This air purifier does not have auto mode; the average air purifier does.
  • No washable prefilter
    This air purifier does not have a washable prefilter; the average air purifier does.
  • 36.3 W lower power
    This air purifier has a lower power output than the average air purifier (1.2 W vs 37.5 W).
    1.2 W vs 37.5 W
  • 0.27 % percentage points lower bacteria elimination
    This air purifier achieves lower certified bacteria elimination than the average air purifier (99.7 % vs 99.97 %).
    99.7 % vs 99.97 %
  • No night mode
    This air purifier does not have night mode; the average air purifier does.
  • 12.9% worse value for money
    Duomishu SY-702 offers worse value for money than the average air purifier (6.66 vs 7.5).
    6.66 vs 7.52
  • 6.9% lower user score
    User score
    7.5/ 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
    ▼▼
    <55-66-77-88-99-10
    Duomishu SY-702
    the average air purifier
    Duomishu SY-702 has a lower user score than the average air purifier (7.53 vs 8.048).
    7.53 vs 8.05
  • 58.3% lower CADR
    This air purifier provides a lower clean air delivery rate than the average air purifier (100 m³/h vs 240 m³/h).
    100 m³/h vs 240 m³/h
  • 34 m² smaller room area
    This air purifier covers a smaller room area than the average air purifier (15 m² vs 49 m²).
    15 m² vs 49 m²
  • 36.3 W lower power
    This air purifier has a lower power output than the average air purifier (1.2 W vs 37.5 W).
    1.2 W vs 37.5 W
  • 1 fewer fan speeds
    This air purifier provides fewer fan speed settings than the average air purifier (2 vs 3).
    2 vs 3
  • No air-quality indicator
    This air purifier does not have an air-quality indicator; the average air purifier does.
  • No auto mode
    This air purifier does not have auto mode; the average air purifier does.
  • No washable prefilter
    This air purifier does not have a washable prefilter; the average air purifier does.
  • 0.27 % percentage points lower bacteria elimination
    This air purifier achieves lower certified bacteria elimination than the average air purifier (99.7 % vs 99.97 %).
    99.7 % vs 99.97 %
  • No night mode
    This air purifier does not have night mode; the average air purifier does.
  • No timer
    This air purifier does not have a timer; the average air purifier does.
  • No continuous purification
    This air purifier does not support continuous purification; the average air purifier does.
  • 1 fewer filtration stages
    This air purifier features fewer filtration stages than the average air purifier (2 vs 3).
    2 vs 3
  • No display
    This air purifier does not have a display; the average air purifier does.
  • 0.6 m shorter power cord
    This air purifier features a shorter power cord than the average air purifier (1.2 m vs 1.8 m).
    1.2 m vs 1.8 m
  • 84.3% larger external volume
    This air purifier has a larger overall volume than the average air purifier (4818.9 cm³ vs 30700.8 cm³).
    4,818.88 cm³ vs 30,700.8 cm³

Third-party reviews

Based on 683 buyer reviews from online shops.
Reviews last updated: August 2026 · How we calculate this
Read buyer reviews on Amazon →

What we like about Duomishu SY-702

  • Equipped with an efficient H13 True HEPA filter that captures 99.97% of allergens, dust, and smoke
  • Dual-function design includes a built-in aromatherapy diffuser cup for essential oils
  • Operates quietly, making it highly suitable for use while sleeping
  • Features a compact and lightweight body that makes it highly portable and easy to move
  • Simple user interface with a straightforward, touch-controlled top panel
  • Offers low energy consumption and multiple timer settings
  • Includes a dimmable blue LED night light feature
  • Comes at an affordable, budget-friendly price point

What we don't like about Duomishu SY-702

  • Not powerful enough to clean the air effectively in large rooms
  • Lacks smart features, smartphone application support, or programmable routines
  • No built-in automatic air quality particle sensor to auto-adjust fan speed
  • Replacement filters must be changed frequently to maintain performance

Verdict

The Duomishu SY-702 is a compact, corded-electric air purifier powered via USB Type-C, engineered for small indoor spaces up to 161 square feet (15 square metres) with a Clean Air Delivery Rate (CADR) of 150 cubic metres per hour. It features a three-layer filtration system combining an H13 True HEPA filter—which captures 99.97% of airborne particles down to 0.1 to 0.3 microns, including dust, smoke, and pollen—with an activated carbon filter to neutralise household odours. Main advantages include an ozone-free operation, an integrated bottom aromatherapy cup for essential oils, a dual-intensity ambient night light, and a quiet sleep mode operating at 30 decibels. However, its primary downsides are its limited performance in larger rooms and the recurring maintenance cost of manual filter replacements required every 3 to 6 months.

Compare Duomishu SY-702 with other products in the Air Purifiers category

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