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Sejoy Top Fill 4L Review | 43 Data compared

Avg. price:~£20Humidification rate:300 ml/hMaximum room area:30 m²Water tank capacity:4 LMaximum operating time:30 hoursMaximum noise level:30 dB

Sejoy Top Fill 4L Review: Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

Sejoy Top Fill 4L
6.5/10

Overall score

Score
6.5/ 10
✕
What it is
An overall evaluation of products in the Humidifiers category, based on technical analysis and user reviews.
When it matters
When you need a quick reference for identifying the best products in the Humidifiers category.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 66% of models
Score components

80%

6.5

Technical score

20%

6.6

User score

â–¼Worse than 66% of humidifiers
7.5

Value for money

Value for money
7.5/ 10
✕
What it is
An indicator that combines the overall score of products in the Humidifiers category with their prices.
When it matters
When you are comparing products in the Humidifiers category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 54% of models
Score components

70%

6.5

Overall score

30%

10

Price

â–¼Worse than 54%
6.5

Technical score

Technical score
6.5/ 10
✕
What it is
An assessment of technical performance for products in the Humidifiers category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Humidifiers category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 59% of models
Score components

45%

7.3

Performance

40%

6.3

Features

15%

4.5

Design

â–¼Worse than 59%
6.6

User score

User score
6.6/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Humidifiers category.
When it matters
When you want to know how products in the Humidifiers 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 96% of models
Score components

70%

7.2

User ratings

30%

5.2

Number of reviews

Based on ratings from across the web.
â–¼Worse than 96%
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Best prices
*As an Amazon Associate, we earn from qualifying purchases.
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 humidifier Sejoy Top Fill 4L

Technical score
Technical score
6.5/ 10
✕
What it is
An assessment of technical performance for products in the Humidifiers category across these key areas: Performance, Features, Design.
When it matters
When you want to compare products in the Humidifiers category by technical performance, specifications, and available features.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 59% of models
Score components:

45%

7.3

Performance

40%

6.3

Features

15%

4.5

Design

6.5
User score
User score
6.6/ 10
✕
What it is
A rating that combines user reviews with the total review volume for products in the Humidifiers category.
When it matters
When you want to know how products in the Humidifiers 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 96% of models
Score components

70%

7.2

User ratings

30%

5.2

Number of reviews

Based on ratings from across the web.
6.6
Popularity
Popularity
5.2/ 10
✕
What it is
An indicator based on the number of reviews received by products in the Humidifiers category.
When it matters
When you prefer products in the Humidifiers category that have been chosen and reviewed by many other buyers.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 75% of models
Popularity:
Sejoy Top Fill 4L has a popularity score of 5.2 points, which is lower than 74.5% of products in this category.
5.2
Value for money
Value for money
7.5/ 10
✕
What it is
An indicator that combines the overall score of products in the Humidifiers category with their prices.
When it matters
When you are comparing products in the Humidifiers category and want a good balance between quality and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 54% of models
Score components:

70%

6.5

Overall score

30%

10

Price

7.5
Technology
evaporative
Humidification rate
300 ml/h
Market range: <50 ml/h – >500 ml/h
This humidifier delivers a humidification rate of 300 ml/h, which is higher than that of 55.7% of humidifiers and equal to that of 17.9% of humidifiers.
Maximum room area
30 m²
Market range: <20 m² – >60 m²
This humidifier covers rooms up to 30 m², which is smaller than that of 50.7% of humidifiers and equal to that of 16.2% of humidifiers.
Water tank capacity
4 L
Market range: <0.4 L – >6.5 L
This humidifier has a water tank capacity of 4 L, which is larger than that of 57.7% of humidifiers and equal to that of 7.4% of humidifiers.
Maximum operating time
30 hours
Market range: <8 hours – >60 hours
This humidifier runs for up to 30 hours on a single fill, which is longer than 61.1% of humidifiers and equal to that of 4.7% of humidifiers.
Show more
Warm mist function
no
This humidifier does not offer a warm-mist option. A warm-mist option is present in 26.2% of humidifiers.
Aromatherapy support
yes
This humidifier supports aromatherapy. Aromatherapy support is available in 73.8% of humidifiers.
Dedicated aroma compartment
yes
This humidifier includes a dedicated aroma compartment. A dedicated aroma compartment is present in 48.3% of humidifiers.
Automatic low-water shut-off
yes
This humidifier shuts off automatically when water runs low. Automatic low-water shut-off is available in 99.3% of humidifiers.
Water level indicator
no
This humidifier does not include a water-level indicator. A water-level indicator is present in 84.6% of humidifiers.
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Fill type
top fill
Color
white
Material
plastic
360° nozzle
no
This humidifier does not have a 360° nozzle. A 360° nozzle is included in 58.4% of humidifiers.
Display
yes
This humidifier has a display. A display is included in 43.6% of humidifiers.
Show more

Sejoy Top Fill 4L vs the average humidifier

246810TotalPerformanceFeaturesDesign
  • Hygrostat included
    This humidifier has a hygrostat; the average humidifier has no hygrostat.
  • Dedicated aroma compartment
    This humidifier includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
  • Display included
    This humidifier has a display; the average humidifier does not have a display.
  • 15.4% higher humidification rate
    This humidifier delivers a higher humidification rate than the average humidifier (300 ml/h vs 260 ml/h).
    300 ml/h vs 260 ml/h
  • 3.1 dB lower maximum noise
    This humidifier is quieter at maximum output than the average humidifier (30 dB vs 33.1 dB).
    30 dB vs 33.1 dB
  • 8.38 cm shorter body
    This humidifier has a lower profile than the average humidifier (20.6 cm vs 28.98 cm).
    20.6 cm vs 28.98 cm
  • 6 hours longer runtime
    This humidifier runs longer on a single fill than the average humidifier (30 hours vs 24 hours).
    30 hours vs 24 hours
  • 0.65 L larger water tank
    This humidifier has a larger water tank than the average humidifier (4 L vs 3.35 L).
    4 L vs 3.35 L
  • 75% cheaper
    Sejoy Top Fill 4L is cheaper than the average humidifier (£20 vs £35).
    £20 vs £35
  • Hygrostat included
    This humidifier has a hygrostat; the average humidifier has no hygrostat.
  • 15.4% higher humidification rate
    This humidifier delivers a higher humidification rate than the average humidifier (300 ml/h vs 260 ml/h).
    300 ml/h vs 260 ml/h
  • 3.1 dB lower maximum noise
    This humidifier is quieter at maximum output than the average humidifier (30 dB vs 33.1 dB).
    30 dB vs 33.1 dB
  • 6 hours longer runtime
    This humidifier runs longer on a single fill than the average humidifier (30 hours vs 24 hours).
    30 hours vs 24 hours
  • 0.65 L larger water tank
    This humidifier has a larger water tank than the average humidifier (4 L vs 3.35 L).
    4 L vs 3.35 L
  • Dedicated aroma compartment
    This humidifier includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
  • Display included
    This humidifier has a display; the average humidifier does not have a display.
  • 8.38 cm shorter body
    This humidifier has a lower profile than the average humidifier (20.6 cm vs 28.98 cm).
    20.6 cm vs 28.98 cm
  • No timer
    This humidifier does not include a programmable timer; the average humidifier includes a programmable timer.
  • No water-level indicator
    This humidifier does not include a water-level indicator; the average humidifier includes a water-level indicator.
  • 15.55 cm deeper body
    This humidifier has a deeper profile than the average humidifier (33.8 cm vs 18.25 cm).
    33.8 cm vs 18.25 cm
  • 14.25 cm wider body
    This humidifier has a wider body than the average humidifier (33.8 cm vs 19.6 cm).
    33.8 cm vs 19.555 cm
  • 79.1% heavier
    This humidifier is heavier than the average humidifier (2.7 kg vs 1.48 kg).
    2.65 kg vs 1.48 kg
  • No 360° nozzle
    This humidifier does not have a 360° nozzle; the average humidifier has a 360° nozzle.
  • 4 W higher power draw
    This humidifier draws more power than the average humidifier (28 W vs 24 W).
    28 W vs 24 W
  • 1 m² less room coverage
    This humidifier covers smaller rooms than the average humidifier (30 m² vs 31 m²).
    30 m² vs 31 m²
  • 21.6% lower user score
    User score
    6.6/ 10
    ✕
    What it is
    A rating that combines user reviews with the total review volume for products in the Humidifiers category.
    When it matters
    When you want to know how products in the Humidifiers 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
    Sejoy Top Fill 4L
    the average humidifier
    Sejoy Top Fill 4L has a lower user score than the average humidifier (6.58 vs 8.000).
    6.58 vs 8
  • 23.8% less popular
    Sejoy Top Fill 4L is less popular than the average humidifier (5.17 vs 6.4).
    5.17 vs 6.4
  • 0.2% worse value for money
    Sejoy Top Fill 4L offers worse value for money than the average humidifier (7.54 vs 7.6).
    7.54 vs 7.56
  • 4 W higher power draw
    This humidifier draws more power than the average humidifier (28 W vs 24 W).
    28 W vs 24 W
  • 1 m² less room coverage
    This humidifier covers smaller rooms than the average humidifier (30 m² vs 31 m²).
    30 m² vs 31 m²
  • 5 % RH higher target humidity
    This humidifier requires a higher minimum target humidity than the average humidifier (45 % RH vs 40 % RH).
    45 % RH vs 40 % RH
  • No timer
    This humidifier does not include a programmable timer; the average humidifier includes a programmable timer.
  • No water-level indicator
    This humidifier does not include a water-level indicator; the average humidifier includes a water-level indicator.
  • 15.55 cm deeper body
    This humidifier has a deeper profile than the average humidifier (33.8 cm vs 18.25 cm).
    33.8 cm vs 18.25 cm
  • 14.25 cm wider body
    This humidifier has a wider body than the average humidifier (33.8 cm vs 19.6 cm).
    33.8 cm vs 19.555 cm
  • 79.1% heavier
    This humidifier is heavier than the average humidifier (2.7 kg vs 1.48 kg).
    2.65 kg vs 1.48 kg
  • No 360° nozzle
    This humidifier does not have a 360° nozzle; the average humidifier has a 360° nozzle.

Third-party reviews

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

What we like about Sejoy Top Fill 4L

  • Convenient top-fill design eliminates the need to disassemble the unit for refilling.
  • Generous 4-liter tank capacity provides long continuous runtimes up to 24 hours without frequent refills.
  • Whisper-quiet ultrasonic operation makes it highly suitable for bedrooms and nurseries.
  • Effective at relieving dry skin, sinus congestion, and preventing nosebleeds.
  • Features helpful smart functions including adjustable mist levels and an intelligent constant humidity mode.
  • Includes an integrated essential oil tray for aromatherapy benefits.

What we don't like about Sejoy Top Fill 4L

  • The tank's tall and narrow geometry makes it difficult to reach the very bottom for thorough cleaning.
  • Components are not dishwasher safe and require demanding manual maintenance.
  • Risk of water leakage or bubbling over if the water tank cap is not perfectly aligned and locked.
  • Can cause over-humidification and excess moisture if used in very small spaces.
  • The clear plastic part of the housing cannot be unscrewed, hindering visibility cleanup over time.

Verdict

The Sejoy Top Fill 4L Humidifier is a 28W tabletop ultrasonic device featuring a 4-litre (1-gallon) water tank, an LED touch screen display, and a 3-speed adjustable mist output. It is engineered with intelligent constant humidity control (adjustable from 45% to 80% RH), a 360-degree rotating nozzle, an integrated aromatherapy diffuser, and a 7-colour night light. Main advantages include an easy-to-refill top-fill design, whisper-quiet operation with a sound-absorbing sponge, water-shortage auto-shutoff protection, and a long runtime of up to 30 to 32 hours on its lowest setting. However, notable drawbacks include a lack of a remote control, potential difficulties when cleaning the internal components thoroughly, and a user manual that some consumers find lacks detail.

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