OVERALL
SPECS
VS AVERAGE
REVIEWS
ALTERNATIVES

LEVOIT Classic 300S Review | 43 Data compared

double-arrow
  • Avg. price in UK: ~£60
  • Avg. price in US: ~$70
  • Humidification rate: 300 ml/h
  • Maximum room area: 47 m²
  • Water tank capacity: 6 L
  • Maximum operating time: 60 hours
  • Maximum noise level: 30 dB

LEVOIT Classic 300S review. Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

8.6

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%

8.5

Technical Score

20.0%

9.1

User score

Excellent
8.5

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%

8.8

Performance

40.0%

8.6

Features

15.0%

6.9

Design

Excellent
9.1

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%

8.8

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(24707)
amazon
4.0
(1181)
amazon
5.0
(1)
United States
Amazon_logo.png
4.4
(38555)
Amazon_logo.png
4.3
(1177)
Amazon_logo.png
4.6
(138)
Amazon_logo.png
5.0
(2)

(Reviews last updated: August 2026)

Exceptional
  • 9.5
    Bedroom use

    Score components:

    35.0%

    8.5

    Maximum noise level

    25.0%

    10

    Maximum operating time

    20.0%

    10

    Timer

    20.0%

    10

    Automatic low-water shut-off

  • 8.6
    Large rooms

    Score components:

    35.0%

    7.4

    Humidification rate

    30.0%

    8.2

    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

  • levoit-classic-300s
  • levoit-classic-300s
  • levoit-classic-300s
  • levoit-classic-300s
  • levoit-classic-300s
  • levoit-classic-300s
  • levoit-classic-300s
  • levoit-classic-300s
levoit-classic-300s
levoit-classic-300s
levoit-classic-300s
levoit-classic-300s
levoit-classic-300s
levoit-classic-300s
levoit-classic-300s
levoit-classic-300s

Best prices in UK

Best rankings

?

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

Verdict

The LEVOIT Classic 300S is a smart ultrasonic cool-mist humidifier featuring a large 6-litre (1.58-gallon) top-fill water tank designed to cover rooms spanning 215 to 505 square feet (20–47 m²). Its primary characteristics include an integrated humidistat for real-time monitoring, an automated Auto Mode, 4 mist level settings, an aromatherapy tray for essential oils, and voice/app compatibility via VeSync, Amazon Alexa, and Google Assistant. Main pros include an impressive continuous runtime of up to 60 hours on its lowest setting, an ultra-quiet operating volume under 30 dB ideal for bedrooms, a convenient easy-to-clean top-fill design, and automatic safety shut-off when empty. On the downside, some users note a risk of low-quality build components leading to potential leaks over extended use, a lack of physical angle control for the 360° rotating nozzle, and typical ultrasonic vulnerabilities such as white mineral dust accumulation if distilled water is not used.

Technical Specifications of humidifier LEVOIT Classic 300S

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%

8.8

Performance

40.0%

8.6

Features

15.0%

6.9

Design

8.5
LEVOIT Classic 300S has a technical score of 8.45 points, which is higher than 97.3% 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%

8.8

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.3
(24707)
amazon
4.0
(1181)
amazon
5.0
(1)
United States
Amazon_logo.png
4.4
(38555)
Amazon_logo.png
4.3
(1177)
Amazon_logo.png
4.6
(138)
Amazon_logo.png
5.0
(2)

(Reviews last updated: August 2026)

9.1
LEVOIT Classic 300S has a user score of 9.14 points, which is higher than 85.9% 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.
10
LEVOIT Classic 300S has a popularity of 10 points, which is higher than 67.8% 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%

8.6

Overall score

40.0%

9.0

Price

8.7
LEVOIT Classic 300S has a quality-to-price ratio of 8.7 points, which is higher than 98.7% 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

ultrasonic
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
LEVOIT Classic 300S 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

47 m²
LEVOIT Classic 300S covers rooms up to 47 m², which is larger than that of 78.9% 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

6 L
LEVOIT Classic 300S has a water tank capacity of 6 L, which is larger than that of 80.5% of humidifiers and equal to that of 9.4% 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

60 hours
LEVOIT Classic 300S runs for up to 60 hours on a single fill, which is longer than 89.9% of humidifiers and equal to that of 6% 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
LEVOIT Classic 300S 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
LEVOIT Classic 300S 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
LEVOIT Classic 300S 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
LEVOIT Classic 300S 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
LEVOIT Classic 300S 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

white, 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
LEVOIT Classic 300S 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
LEVOIT Classic 300S has a display. A display is included in 43.6% of humidifiers.
Show more

LEVOIT Classic 300S vs the average humidifier

  • 36 hours longer runtime
    LEVOIT Classic 300S runs longer on a single fill than the average humidifier (60 hours vs 24 hours).
    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

    LEVOIT Classic 300S runs longer on a single fill than the average humidifier (60 hours vs 24 hours).60 hours vs 24 hours
  • Wi-Fi control
    LEVOIT Classic 300S supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
    What it is: Indicates whether the humidifier connects to Wi-Fi for remote app-based features.
    When it matters: Wi-Fi matters if you want to adjust settings or monitor the humidifier away from its controls.

    Importance: HIGH

    Good value: yes

    LEVOIT Classic 300S supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
  • 2.65 L larger water tank
    LEVOIT Classic 300S has a larger water tank than the average humidifier (6 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

    LEVOIT Classic 300S has a larger water tank than the average humidifier (6 L vs 3.35 L).6 L vs 3.35 L
  • Voice control supported
    LEVOIT Classic 300S supports voice control; the average humidifier does not support voice control.
    What it is: Indicates whether the humidifier can be operated through a compatible voice assistant.
    When it matters: Voice control is useful for hands-free adjustment and smart-home routines.

    Importance: MEDIUM

    Good value: yes

    LEVOIT Classic 300S supports voice control; the average humidifier does not support voice control.
  • Hygrostat included
    LEVOIT Classic 300S 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

    LEVOIT Classic 300S has a hygrostat; the average humidifier has no hygrostat.
  • 16 m² more room coverage
    LEVOIT Classic 300S covers larger rooms than the average humidifier (47 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

    LEVOIT Classic 300S covers larger rooms than the average humidifier (47 m² vs 31 m²).47 m² vs 31 m²
  • Dedicated aroma compartment
    LEVOIT Classic 300S 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

    LEVOIT Classic 300S includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
  • Display included
    LEVOIT Classic 300S 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

    LEVOIT Classic 300S has a display; the average humidifier does not have a display.
  • 36 hours longer runtime
    LEVOIT Classic 300S runs longer on a single fill than the average humidifier (60 hours vs 24 hours).
  • 2.65 L larger water tank
    LEVOIT Classic 300S has a larger water tank than the average humidifier (6 L vs 3.35 L).
  • Hygrostat included
    LEVOIT Classic 300S has a hygrostat; the average humidifier has no hygrostat.
  • 16 m² more room coverage
    LEVOIT Classic 300S covers larger rooms than the average humidifier (47 m² vs 31 m²).
  • 1 levels more mist control
    LEVOIT Classic 300S offers more mist adjustment levels than the average humidifier (4 levels vs 3 levels).
  • 15.4% higher humidification rate
    LEVOIT Classic 300S delivers a higher humidification rate than the average humidifier (300 ml/h vs 260 ml/h).
  • 3.1 dB lower maximum noise
    LEVOIT Classic 300S is quieter at maximum output than the average humidifier (30 dB vs 33.1 dB).
  • Wi-Fi control
    LEVOIT Classic 300S supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
  • Voice control supported
    LEVOIT Classic 300S supports voice control; the average humidifier does not support voice control.
  • Dedicated aroma compartment
    LEVOIT Classic 300S includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
  • 12 hours longer timer
    LEVOIT Classic 300S provides a longer timer setting than the average humidifier (24 hours vs 12 hours).
  • Display included
    LEVOIT Classic 300S has a display; the average humidifier does not have a display.
  • 0.15 m longer power cable
    LEVOIT Classic 300S has a longer power cable than the average humidifier (1.7 m vs 1.51 m).

Total
Overall
Performance
Features
Design
  • 2 W higher power draw
    LEVOIT Classic 300S draws more power than the average humidifier (26 W vs 24 W).
  • 4.95 cm wider body
    LEVOIT Classic 300S has a wider body than the average humidifier (24.5 cm vs 19.555 cm).
  • 35.1% heavier
    LEVOIT Classic 300S is heavier than the average humidifier (2 kg vs 1.48 kg).
  • 5.02 cm taller body
    LEVOIT Classic 300S stands taller than the average humidifier (34 cm vs 28.98 cm).
  • 0.95 cm deeper body
    LEVOIT Classic 300S has a deeper profile than the average humidifier (19.2 cm vs 18.25 cm).
  • 4.95 cm wider body
    LEVOIT Classic 300S has a wider body than the average humidifier (24.5 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

    LEVOIT Classic 300S has a wider body than the average humidifier (24.5 cm vs 19.555 cm).24.5 cm vs 19.555 cm
  • 35.1% heavier
    LEVOIT Classic 300S is heavier than the average humidifier (2 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

    LEVOIT Classic 300S is heavier than the average humidifier (2 kg vs 1.48 kg).2 kg vs 1.48 kg
  • 5.02 cm taller body
    LEVOIT Classic 300S stands taller than the average humidifier (34 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

    LEVOIT Classic 300S stands taller than the average humidifier (34 cm vs 28.98 cm).34 cm vs 28.98 cm
  • 2 W higher power draw
    LEVOIT Classic 300S draws more power than the average humidifier (26 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

    LEVOIT Classic 300S draws more power than the average humidifier (26 W vs 24 W).26 W vs 24 W
  • 0.95 cm deeper body
    LEVOIT Classic 300S has a deeper profile than the average humidifier (19.2 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

    LEVOIT Classic 300S has a deeper profile than the average humidifier (19.2 cm vs 18.25 cm).19.2 cm vs 18.25 cm
  • 71.4% more expensive
    LEVOIT Classic 300S is more expensive than the average humidifier (£60 vs £35).
    LEVOIT Classic 300S is more expensive than the average humidifier (£60 vs £35).£60 vs £35
Total
Overall
Performance
Design

Graphic comparison of LEVOIT Classic 300S and other products in the Humidifiers category

Attribute category
Attribute
No results found

Third-party reviews

United Kingdom
amazon
4.3
24707 Reviews
amazon
4.0
1181 Reviews
amazon
5.0
1 Reviews
United States
Amazon_logo.png
4.4
38555 Reviews
Amazon_logo.png
4.3
1177 Reviews
Amazon_logo.png
4.6
138 Reviews
Amazon_logo.png
5.0
2 Reviews

(Reviews last updated: August 2026)

What customers like about LEVOIT Classic 300S?

  • Large water tank provides a long runtime (up to 60 hours)
  • Very quiet operation, making it ideal for bedrooms and nurseries
  • Smart connectivity allows for remote control and scheduling via the VeSync app
  • Auto mode automatically detects room humidity and adjusts the mist level
  • Top-fill design makes refilling easy, and it features a built-in aromatherapy pad
  • Energy-efficient with an attractive, compact footprint

What customers dislike about LEVOIT Classic 300S?

  • Requires regular weekly maintenance to stay clean and prevent mold
  • Multiple parts and crevices can be a hassle to clean
  • None of the components are dishwasher-safe
  • Not powerful enough for very large, open-concept spaces
  • Produces cool mist only (no warm mist option)

Expert reviews

L
livescience.com
13/09/2022
Summary of the review
Levoit Classic 300S humidifier review - Live Science
T
techgearlab.com
19/08/2025
Summary of the review
Levoit Classic 300S Ultrasonic Smart Review - TechGearLab
R
rtings.com
22/11/2024
Summary of the review
Levoit Classic 300S Humidifier Review - RTINGS.com
C
consumerreports.org
22/11/2024
Summary of the review
Levoit Classic 300S Humidifier Review - Consumer Reports
F
faz.net
07/04/2026
Summary of the review
The Best Humidifier | Review 08/2026 | F.A.Z. Kaufkompass
(Translated)Show original
L
lacasasibarita.es
27/07/2026
Summary of the review
Levoit Classic 300S Humidifier - The Sybarite House
(Translated)Show original

Video reviews

Best alternatives

levoit-dual-200s
LEVOIT Dual 200S

Humidifiers

8.1
dreo-smart-humidifier-hm311s-4l
Dreo Smart Humidifier HM311S 4L

Humidifiers

7.9
dreo-smart-humidifier-hm524s-6l
Dreo Smart Humidifier HM524S 6L

Humidifiers

8.5
yokekon-yk721553973480
YOKEKON YK721553973480

Humidifiers

7.6
elechomes-ec5501
Elechomes EC5501

Humidifiers

8.2
vocolinc-mistflow-vh1
VOCOlinc MistFlow VH1

Humidifiers

6.8
oraimo-ohm-h01
Oraimo OHM-H01

Humidifiers

8.3
goveelife-smart-45l
GoveeLife Smart 4.5L

Humidifiers

8.0
dreo-smart-humidifier-hm306s-3l
Dreo Smart Humidifier HM306S 3L

Humidifiers

7.9
babymoov-hygro-plus
Babymoov Hygro Plus

Humidifiers

7.2
vicks-sweetdreams-cool-mist-vul575
Vicks SweetDreams Cool Mist VUL575

Humidifiers

6.5
xiaomi-mi-smart-humidifier-2
Xiaomi Mi Smart Humidifier 2

Humidifiers

7.5

Compare LEVOIT Classic 300S with other products in the Humidifiers category

VS
VS

Compare