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Sejoy Cool Mist Air 8L Review | 43 Data compared

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  • Avg. price in UK: ~£90
  • Avg. price in US: ~$100
  • Humidification rate: 300 ml/h
  • Maximum room area: 46 m²
  • Water tank capacity: 8 L
  • Maximum operating time: 24 hours
  • Maximum noise level: 38 dB

Sejoy Cool Mist Air 8L review. Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

7.3

Overall score

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 components:

80.0%

7.6

Technical Score

20.0%

6.2

User score

Very good
7.6

Technical Score

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 components:

45.0%

7.8

Performance

40.0%

7.5

Features

15.0%

7.4

Design

Very good
6.2

User score

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 components:

70.0%

7.2

User reviews

30.0%

4.0

Popularity

User score:
United Kingdom
amazon
3.6
(252)

(Reviews last updated: August 2026)

Good
  • 6.8
    Bedroom use

    Score components:

    35.0%

    4.5

    Maximum noise level

    25.0%

    4.7

    Maximum operating time

    20.0%

    10

    Timer

    20.0%

    10

    Automatic low-water shut-off

  • 8.5
    Large rooms

    Score components:

    35.0%

    7.4

    Humidification rate

    30.0%

    8.0

    Maximum room area

    25.0%

    10

    Water tank capacity

    10.0%

    10

    Hygrostat

  • 9.4
    Plant care

    Score components:

    30.0%

    10

    Hygrostat

    25.0%

    7.4

    Humidification rate

    25.0%

    10

    Water tank capacity

    20.0%

    10

    360° nozzle

  • sejoy-cool-mist-air-8l
  • sejoy-cool-mist-air-8l
sejoy-cool-mist-air-8l
sejoy-cool-mist-air-8l

Best prices in UK

Best rankings

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Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Sejoy Cool Mist Air 8L is a filterless floor tower ultrasonic humidifier engineered for large spaces up to 500 square feet, operating at a 25W power rating with a maximum mist output of 300mL/h. Key characteristics and pros include a massive 8-litre (2.11-gallon) detachable top-fill water tank that delivers up to 24 to 27 hours of continuous operation, an integrated essential oil tray, a 360-degree rotating nozzle, an adjustable humidistat (40%-75%), a 12-hour timer, and a whisper-quiet sleep mode operating below 30 to 38 decibels alongside a remote control. However, notable cons include a top cover that does not lock securely to the base, making it prone to spillage if knocked over, a built-in humidity sensor that can be inaccurate by roughly 20%, and a thin water level window that remains difficult to read in dim lighting.

Technical Specifications of humidifier Sejoy Cool Mist Air 8L

Technical Score

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 components:

45.0%

7.8

Performance

40.0%

7.5

Features

15.0%

7.4

Design

7.6
Sejoy Cool Mist Air 8L has a technical score of 7.6 points, which is higher than 78.5% of products in this category.
User score

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 components:

70.0%

7.2

User reviews

30.0%

4.0

Popularity

User score:
United Kingdom
amazon
3.6
(252)

(Reviews last updated: August 2026)

6.2
Sejoy Cool Mist Air 8L has a user score of 6.23 points, which is lower than 92.6% of products in this category.
Popularity
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.
4.0
Sejoy Cool Mist Air 8L has a popularity of 4 points, which is lower than 63.1% of products in this category.
Ratio quality/price

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 components:

60.0%

7.3

Overall score

40.0%

8.2

Price

7.6
Sejoy Cool Mist Air 8L has a quality-to-price ratio of 7.6 points, which is higher than 53.7% of products in this category.
Technology
What it is: The method the humidifier uses to turn water into moisture for the room.
When it matters: Technology affects mist temperature, visible output, maintenance needs, and sensitivity to minerals in the water.

Importance: LOW

evaporative
Humidification rate
What it is: The maximum amount of water the humidifier can release into the air per hour.
When it matters: A higher rate raises room humidity faster and is more useful in dry or larger spaces.

Importance: HIGH

Good value: At least 300 ml/h

300 ml/h
Sejoy Cool Mist Air 8L 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
What it is: The largest room floor area the humidifier is recommended to cover.
When it matters: A larger coverage rating is important for open-plan spaces and larger bedrooms or living rooms.

Importance: HIGH

Good value: At least 40 m²

46 m²
Sejoy Cool Mist Air 8L covers rooms up to 46 m², which is larger than that of 73.9% of humidifiers and equal to that of 1.4% of humidifiers.
Water tank capacity
What it is: The usable amount of water the humidifier’s reservoir can hold.
When it matters: A larger tank generally needs fewer refills and can support longer operation between top-ups.

Importance: HIGH

Good value: At least 4 L

8 L
Sejoy Cool Mist Air 8L has a water tank capacity of 8 L, which is larger than that of 93.3% of humidifiers and equal to that of 2.7% of humidifiers.
Maximum operating time
What it is: The longest stated operating time from one full water tank.
When it matters: Longer runtime means fewer refills during overnight use or extended daily operation.

Importance: HIGH

Good value: At least 24 hours

24 hours
Sejoy Cool Mist Air 8L runs for up to 24 hours on a single fill, which is longer than 46.3% of humidifiers and equal to that of 8.7% of humidifiers.
Show more
Warm mist function
What it is: Indicates whether the humidifier can produce warm mist as well as cool mist.
When it matters: Useful when you want warmer output in cool weather instead of cool mist alone.

Importance: HIGH

Good value: yes

no
Sejoy Cool Mist Air 8L does not offer a warm-mist option. A warm-mist option is present in 26.2% of humidifiers.
Aromatherapy support
What it is: Indicates whether the humidifier supports the safe use of aromatic oils or fragrance media.
When it matters: Useful if you want to add fragrance without putting oil directly into the water tank.

Importance: MEDIUM

Good value: yes

yes
Sejoy Cool Mist Air 8L supports aromatherapy. Aromatherapy support is available in 73.8% of humidifiers.
Dedicated aroma compartment
What it is: Indicates whether the humidifier has a separate compartment for aroma pads or essential oils.
When it matters: A dedicated compartment keeps fragrance media separate from the main water tank.

Importance: LOW

Good value: yes

yes
Sejoy Cool Mist Air 8L includes a dedicated aroma compartment. A dedicated aroma compartment is present in 48.3% of humidifiers.
Automatic low-water shut-off
What it is: Indicates whether the humidifier switches itself off when the water level becomes too low.
When it matters: This safety feature helps prevent the unit from continuing to run with an empty tank.

Importance: HIGH

Good value: yes

yes
Sejoy Cool Mist Air 8L shuts off automatically when water runs low. Automatic low-water shut-off is available in 99.3% of humidifiers.
Water level indicator
What it is: Indicates whether the humidifier shows the amount of water remaining in its tank.
When it matters: A visible level indicator makes it easier to know when the tank needs refilling.

Importance: MEDIUM

Good value: yes

yes
Sejoy Cool Mist Air 8L includes a water-level indicator. A water-level indicator is present in 83.9% of humidifiers.
Show more
Fill type
What it is: The design mechanism used to add water to the humidifier tank, distinguished primarily between convenient top-fill and inverted bottom-fill designs.
When it matters: Top-fill humidifiers let you pour water directly into the top with a pitcher without carrying a heavy, dripping tank to the tap.

Importance: LOW

top fill
Color
What it is: The primary exterior color of the humidifier.
When it matters: Color matters when you want the humidifier to blend with the room.

Importance: LOW

black
Material
What it is: The primary material used for the humidifier’s exterior housing.
When it matters: Material matters for durability, feel and appearance.

Importance: LOW

plastic
360° nozzle
What it is: Whether the humidifier has a nozzle that rotates through 360° to direct the mist.
When it matters: A rotating nozzle helps redirect mist without moving the humidifier.

Importance: LOW

Good value: yes

yes
Sejoy Cool Mist Air 8L has a 360° nozzle. A 360° nozzle is included in 57.7% of humidifiers.
Display
What it is: Whether the humidifier has a display for settings and status information.
When it matters: A display makes humidity, mode and timer information easier to check.

Importance: LOW

Good value: yes

yes
Sejoy Cool Mist Air 8L has a display. A display is included in 43.6% of humidifiers.
Show more

Sejoy Cool Mist Air 8L vs the average humidifier

  • 4.65 L larger water tank
    Sejoy Cool Mist Air 8L has a larger water tank than the average humidifier (8 L vs 3.35 L).
    What it is: The usable amount of water the humidifier’s reservoir can hold.
    When it matters: A larger tank generally needs fewer refills and can support longer operation between top-ups.

    Importance: HIGH

    Good value: At least 4 L

    Sejoy Cool Mist Air 8L has a larger water tank than the average humidifier (8 L vs 3.35 L).8 L vs 3.35 L
  • Hygrostat included
    Sejoy Cool Mist Air 8L has a hygrostat; the average humidifier has no hygrostat.
    What it is: Whether the humidifier can sense room humidity and regulate its output automatically.
    When it matters: A hygrostat helps maintain a chosen humidity target without constant manual adjustment or unnecessary operation.

    Importance: HIGH

    Good value: yes

    Sejoy Cool Mist Air 8L has a hygrostat; the average humidifier has no hygrostat.
  • 15 m² more room coverage
    Sejoy Cool Mist Air 8L covers larger rooms than the average humidifier (46 m² vs 31 m²).
    What it is: The largest room floor area the humidifier is recommended to cover.
    When it matters: A larger coverage rating is important for open-plan spaces and larger bedrooms or living rooms.

    Importance: HIGH

    Good value: At least 40 m²

    Sejoy Cool Mist Air 8L covers larger rooms than the average humidifier (46 m² vs 31 m²).46 m² vs 31 m²
  • Washable filter
    Sejoy Cool Mist Air 8L includes a washable filter; the average humidifier does not include a washable filter.
    What it is: Indicates whether the humidifier uses a filter that can be cleaned and reused.
    When it matters: A washable filter can reduce replacement needs, though it still requires regular cleaning.

    Importance: MEDIUM

    Good value: yes

    Sejoy Cool Mist Air 8L includes a washable filter; the average humidifier does not include a washable filter.
  • Dedicated aroma compartment
    Sejoy Cool Mist Air 8L includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
    What it is: Indicates whether the humidifier has a separate compartment for aroma pads or essential oils.
    When it matters: A dedicated compartment keeps fragrance media separate from the main water tank.

    Importance: LOW

    Good value: yes

    Sejoy Cool Mist Air 8L includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
  • 4.32 cm narrower body
    Sejoy Cool Mist Air 8L has a narrower body than the average humidifier (15.2 cm vs 19.555 cm).
    What it is: The humidifier’s side-to-side width.
    When it matters: A narrower humidifier takes up less space on a bedside table, desk or shelf.

    Importance: MEDIUM

    Good value: Up to 20 cm

    Sejoy Cool Mist Air 8L has a narrower body than the average humidifier (15.2 cm vs 19.555 cm).15.24 cm vs 19.555 cm
  • Display included
    Sejoy Cool Mist Air 8L has a display; the average humidifier does not have a display.
    What it is: Whether the humidifier has a display for settings and status information.
    When it matters: A display makes humidity, mode and timer information easier to check.

    Importance: LOW

    Good value: yes

    Sejoy Cool Mist Air 8L has a display; the average humidifier does not have a display.
  • 3.01 cm shallower body
    Sejoy Cool Mist Air 8L has a shallower depth than the average humidifier (15.2 cm vs 18.25 cm).
    What it is: The humidifier’s front-to-back depth.
    When it matters: A shallower humidifier needs less usable surface depth on a table or shelf.

    Importance: MEDIUM

    Good value: Up to 20 cm

    Sejoy Cool Mist Air 8L has a shallower depth than the average humidifier (15.2 cm vs 18.25 cm).15.24 cm vs 18.25 cm
  • 4.65 L larger water tank
    Sejoy Cool Mist Air 8L has a larger water tank than the average humidifier (8 L vs 3.35 L).
  • Hygrostat included
    Sejoy Cool Mist Air 8L has a hygrostat; the average humidifier has no hygrostat.
  • 15 m² more room coverage
    Sejoy Cool Mist Air 8L covers larger rooms than the average humidifier (46 m² vs 31 m²).
  • 10 % RH higher target humidity
    Sejoy Cool Mist Air 8L supports a higher target humidity setting than the average humidifier (90% RH vs 80% RH).
  • 15.4% higher humidification rate
    Sejoy Cool Mist Air 8L delivers a higher humidification rate than the average humidifier (300 ml/h vs 260 ml/h).
  • Washable filter
    Sejoy Cool Mist Air 8L includes a washable filter; the average humidifier does not include a washable filter.
  • Dedicated aroma compartment
    Sejoy Cool Mist Air 8L includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
  • 4.32 cm narrower body
    Sejoy Cool Mist Air 8L has a narrower body than the average humidifier (15.2 cm vs 19.555 cm).
  • Display included
    Sejoy Cool Mist Air 8L has a display; the average humidifier does not have a display.
  • 3.01 cm shallower body
    Sejoy Cool Mist Air 8L has a shallower depth than the average humidifier (15.2 cm vs 18.25 cm).

Total
Overall
Performance
Features
Design
  • 4.9 dB higher maximum noise
    Sejoy Cool Mist Air 8L is louder at maximum output than the average humidifier (38 dB vs 33.1 dB).
  • 1 W higher power draw
    Sejoy Cool Mist Air 8L draws more power than the average humidifier (25 W vs 24 W).
  • No LED lighting
    Sejoy Cool Mist Air 8L does not feature LED lighting; the average humidifier features LED lighting.
  • 42.14 cm taller body
    Sejoy Cool Mist Air 8L stands taller than the average humidifier (71.1 cm vs 28.98 cm).
  • 41.9% heavier
    Sejoy Cool Mist Air 8L is heavier than the average humidifier (2.1 kg vs 1.48 kg).
  • 4.9 dB higher maximum noise
    Sejoy Cool Mist Air 8L is louder at maximum output than the average humidifier (38 dB vs 33.1 dB).
    What it is: The highest stated operating sound level across normal humidification modes.
    When it matters: A lower maximum noise level is better for bedrooms, nurseries, calls, and light sleepers.

    Importance: HIGH

    Good value: Up to 35 dB

    Sejoy Cool Mist Air 8L is louder at maximum output than the average humidifier (38 dB vs 33.1 dB).38 dB vs 33.1 dB
  • No LED lighting
    Sejoy Cool Mist Air 8L does not feature LED lighting; the average humidifier features LED lighting.
    What it is: Whether the humidifier includes integrated ambient or night lighting, excluding status-only indicator lights.
    When it matters: Ambient or night lighting can provide a gentle glow without requiring a separate night-light.

    Importance: LOW

    Good value: yes

    Sejoy Cool Mist Air 8L does not feature LED lighting; the average humidifier features LED lighting.
  • 42.14 cm taller body
    Sejoy Cool Mist Air 8L stands taller than the average humidifier (71.1 cm vs 28.98 cm).
    What it is: The humidifier’s total height from its base to its highest point.
    When it matters: A shorter humidifier fits more easily beneath shelves and in low spaces.

    Importance: LOW

    Good value: Up to 25 cm

    Sejoy Cool Mist Air 8L stands taller than the average humidifier (71.1 cm vs 28.98 cm).71.12 cm vs 28.98 cm
  • 41.9% heavier
    Sejoy Cool Mist Air 8L is heavier than the average humidifier (2.1 kg vs 1.48 kg).
    What it is: The humidifier’s weight without packaging.
    When it matters: A lighter humidifier is easier to move for refilling, cleaning or storage.

    Importance: MEDIUM

    Good value: Up to 1.5 kg

    Sejoy Cool Mist Air 8L is heavier than the average humidifier (2.1 kg vs 1.48 kg).2.1 kg vs 1.48 kg
  • 1 W higher power draw
    Sejoy Cool Mist Air 8L draws more power than the average humidifier (25 W vs 24 W).
    What it is: The humidifier’s maximum rated electrical power draw.
    When it matters: Lower power draw can reduce electricity use, especially when the humidifier runs for many hours each day.

    Importance: MEDIUM

    Good value: Up to 25 W

    Sejoy Cool Mist Air 8L draws more power than the average humidifier (25 W vs 24 W).25 W vs 24 W
  • 28.4% lower user score
    Sejoy Cool Mist Air 8L has a lower user score than the average humidifier (6.23 vs 8).
    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.
    Sejoy Cool Mist Air 8L has a lower user score than the average humidifier (6.23 vs 8).6.23 vs 8
  • 2.57x more expensive
    Sejoy Cool Mist Air 8L is more expensive than the average humidifier (£90 vs £35).
    Sejoy Cool Mist Air 8L is more expensive than the average humidifier (£90 vs £35).£90 vs £35
  • 39.2% less popular
    Sejoy Cool Mist Air 8L is less popular than the average humidifier (3.97 vs 5.535).
    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.
    Sejoy Cool Mist Air 8L is less popular than the average humidifier (3.97 vs 5.535).3.97 vs 5.54
Total
Overall
Performance
Features
Design

Graphic comparison of Sejoy Cool Mist Air 8L and other products in the Humidifiers category

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Third-party reviews

United Kingdom
amazon
3.6
252 Reviews

(Reviews last updated: August 2026)

What customers like about Sejoy Cool Mist Air 8L?

  • Large 8-liter capacity minimizes the need for frequent refills during extended use
  • Convenient top-fill design allows users to add water easily without removing the tank
  • Whisper-quiet operation and dedicated sleep mode make it ideal for bedrooms
  • Filterless setup reduces long-term maintenance tasks and extra accessory costs
  • Features a remote control and timer for easy operation from a distance
  • Includes a dedicated essential oil tray for integrated aromatherapy benefits

What customers dislike about Sejoy Cool Mist Air 8L?

  • Built-in humidity sensor can be inaccurate by up to 20 percent
  • The top tank does not lock securely onto the base, making it prone to spills if bumped
  • Narrow and tall tank structure makes the bottom difficult to reach and clean thoroughly
  • Thin water level indicator window is hard to read in low light conditions
  • May temporarily shut down or stop misting when first turned on if water pipes fill slowly

Expert reviews

R
rtings.com
22/11/2024
Summary of the review
Sejoy ASN-13 Humidifier Review - RTINGS.com

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