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LEVOIT OasisMist 450S Review | 43 Data compared

Avg. price:~£90Humidification rate:550 ml/hMaximum room area:39.95 m²Water tank capacity:4.5 LMaximum operating time:45 hoursMaximum noise level:41 dB

LEVOIT OasisMist 450S Review: Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

LEVOIT OasisMist 450S
8.3/10

Overall score

Score
8.3/ 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
★ Better than 93% of models
Score components

80%

8.1

Technical score

20%

9.2

User score

★Better than 93% of humidifiers
8.3

Value for money

Value for money
8.3/ 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–² Better than 85% of models
Score components

70%

8.3

Overall score

30%

8.2

Price

â–²Better than 85%
8.1

Technical score

Technical score
8.1/ 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–² Better than 89% of models
Score components

45%

7.6

Performance

40%

9.1

Features

15%

6.7

Design

â–²Better than 89%
9.2

User score

User score
9.2/ 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
★ Better than 96% of models
Score components

70%

8.8

User ratings

30%

10

Number of reviews

Based on 10,000+ ratings from across the web.
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.
★Better than 96%
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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 humidifier LEVOIT OasisMist 450S

Technical score
Technical score
8.1/ 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–² Better than 89% of models
Score components:

45%

7.6

Performance

40%

9.1

Features

15%

6.7

Design

8.1
User score
User score
9.2/ 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
★ Better than 96% of models
Score components

70%

8.8

User ratings

30%

10

Number of reviews

Based on 10,000+ ratings from across the web.
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.
9.2
Popularity
Popularity
10/ 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
★ Better than 92% of models
Popularity:
LEVOIT OasisMist 450S has a popularity score of 10 points, which is higher than 92% of products in this category.
10
Value for money
Value for money
8.3/ 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–² Better than 85% of models
Score components:

70%

8.3

Overall score

30%

8.2

Price

8.3
Technology
ultrasonic
Humidification rate
550 ml/h
Market range: <50 ml/h – >500 ml/h
This humidifier delivers a humidification rate of 550 ml/h, which is higher than that of 92.9% of humidifiers and equal to that of 3.6% of humidifiers.
Maximum room area
39.95 m²
Market range: <20 m² – >60 m²
This humidifier covers rooms up to 39.95 m², which is larger than that of 59.9% of humidifiers and equal to that of 0.7% of humidifiers.
Water tank capacity
4.5 L
Market range: <0.4 L – >6.5 L
This humidifier has a water tank capacity of 4.5 L, which is larger than that of 67.1% of humidifiers and equal to that of 4.7% of humidifiers.
Maximum operating time
45 hours
Market range: <8 hours – >60 hours
This humidifier runs for up to 45 hours on a single fill, which is longer than 81.2% of humidifiers and equal to that of 0.7% of humidifiers.
Show more
Warm mist function
yes
This humidifier offers a warm-mist option. A warm-mist option is present in 25.5% of humidifiers.
Supports both warm and cool mist.
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.
Includes dedicated aroma hardware such as a tray, pad, drawer, or compartment.
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
yes
This humidifier includes a water-level indicator. A water-level indicator is present in 83.9% of humidifiers.
Show more
Fill type
top fill
Color
white
Material
plastic
360° nozzle
yes
This humidifier has a 360° nozzle. A 360° nozzle is included in 57.7% of humidifiers.
Display
yes
This humidifier has a display. A display is included in 43.6% of humidifiers.
Show more

LEVOIT OasisMist 450S vs the average humidifier

246810TotalPerformanceFeaturesDesign
  • 2.12x higher humidification rate
    This humidifier delivers a higher humidification rate than the average humidifier (550 ml/h vs 260 ml/h).
    550 ml/h vs 260 ml/h
  • Warm-mist option
    This humidifier offers a warm-mist option; the average humidifier does not offer a warm-mist option.
    Supports both warm and cool mist.
  • Wi-Fi control
    This humidifier supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
  • Voice control supported
    This humidifier supports voice control; the average humidifier does not support voice control.
  • Hygrostat included
    This humidifier has a hygrostat; the average humidifier has no hygrostat.
  • 21 hours longer runtime
    This humidifier runs longer on a single fill than the average humidifier (45 hours vs 24 hours).
    45 hours vs 24 hours
  • Dedicated aroma compartment
    This humidifier includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
    Includes dedicated aroma hardware such as a tray, pad, drawer, or compartment.
  • 4.36 cm narrower body
    This humidifier has a narrower body than the average humidifier (15.2 cm vs 19.6 cm).
    15.2 cm vs 19.555 cm
  • 14.5% higher user score
    User score
    9.2/ 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
    LEVOIT OasisMist 450S
    the average humidifier
    LEVOIT OasisMist 450S has a higher user score than the average humidifier (9.16 vs 8.000).
    9.16 vs 8
  • 56.3% more popular
    LEVOIT OasisMist 450S is more popular than the average humidifier (10 vs 6.4).
    10 vs 6.4
  • 9.3% better value for money
    LEVOIT OasisMist 450S offers better value for money than the average humidifier (8.26 vs 7.6).
    8.26 vs 7.56
  • 2.12x higher humidification rate
    This humidifier delivers a higher humidification rate than the average humidifier (550 ml/h vs 260 ml/h).
    550 ml/h vs 260 ml/h
  • Hygrostat included
    This humidifier has a hygrostat; the average humidifier has no hygrostat.
  • 21 hours longer runtime
    This humidifier runs longer on a single fill than the average humidifier (45 hours vs 24 hours).
    45 hours vs 24 hours
  • 6 levels more mist control
    This humidifier offers more mist adjustment levels than the average humidifier (9 levels vs 3 levels).
    Provides three on-device mist levels and up to nine levels in the app.
    9 levels vs 3 levels
  • 1.15 L larger water tank
    This humidifier has a larger water tank than the average humidifier (4.5 L vs 3.35 L).
    4.5 L vs 3.35 L
  • 8.95 m² more room coverage
    This humidifier covers larger rooms than the average humidifier (40 m² vs 31 m²).
    39.95 m² vs 31 m²
  • Warm-mist option
    This humidifier offers a warm-mist option; the average humidifier does not offer a warm-mist option.
    Supports both warm and cool mist.
  • Wi-Fi control
    This humidifier supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
  • Voice control supported
    This humidifier supports voice control; the average humidifier does not support voice control.
  • Dedicated aroma compartment
    This humidifier includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
    Includes dedicated aroma hardware such as a tray, pad, drawer, or compartment.
  • 4.36 cm narrower body
    This humidifier has a narrower body than the average humidifier (15.2 cm vs 19.6 cm).
    15.2 cm vs 19.555 cm
  • Display included
    This humidifier has a display; the average humidifier does not have a display.
  • 0.06 m longer power cable
    This humidifier has a longer power cable than the average humidifier (1.6 m vs 1.51 m).
    1.57 m vs 1.51 m
  • 7.9 dB higher maximum noise
    This humidifier is louder at maximum output than the average humidifier (41 dB vs 33.1 dB).
    41 dB vs 33.1 dB
  • 256 W higher power draw
    This humidifier draws more power than the average humidifier (280 W vs 24 W).
    280 W vs 24 W
  • 9.15 cm deeper body
    This humidifier has a deeper profile than the average humidifier (27.4 cm vs 18.25 cm).
    27.4 cm vs 18.25 cm
  • 62.2% heavier
    This humidifier is heavier than the average humidifier (2.4 kg vs 1.48 kg).
    2.4 kg vs 1.48 kg
  • 2.57x more expensive
    LEVOIT OasisMist 450S is more expensive than the average humidifier (£90 vs £35).
    £90 vs £35
  • 1.42 cm taller body
    This humidifier stands taller than the average humidifier (30.4 cm vs 28.98 cm).
    30.4 cm vs 28.98 cm
  • 2.57x more expensive
    LEVOIT OasisMist 450S is more expensive than the average humidifier (£90 vs £35).
    £90 vs £35
  • 7.9 dB higher maximum noise
    This humidifier is louder at maximum output than the average humidifier (41 dB vs 33.1 dB).
    41 dB vs 33.1 dB
  • 256 W higher power draw
    This humidifier draws more power than the average humidifier (280 W vs 24 W).
    280 W vs 24 W
  • 9.15 cm deeper body
    This humidifier has a deeper profile than the average humidifier (27.4 cm vs 18.25 cm).
    27.4 cm vs 18.25 cm
  • 62.2% heavier
    This humidifier is heavier than the average humidifier (2.4 kg vs 1.48 kg).
    2.4 kg vs 1.48 kg
  • 1.42 cm taller body
    This humidifier stands taller than the average humidifier (30.4 cm vs 28.98 cm).
    30.4 cm vs 28.98 cm

Video reviews

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

Expert reviews

In-depth analysis and verdict from leading tech publications

T
techgearlab.com
19/08/2025
Summary of the review
Levoit OasisMist 450S Smart Review | Tested & Rated
T
techgearlab.com
19/08/2025
Summary of the review
The Best Humidifiers | Lab Tested & Ranked
F
faz.net
07/04/2026
Summary of the review
The Best Humidifier | Test 08/2026 | F.A.Z. Kaufkompass
(Translated)Show original
J
je-suis-papa.ouest-france.fr
18/05/2026
Summary of the review
Levoit OasisMist 450S Humidifier: Full Review and Testing
(Translated)Show original
L
lavelab.com
17/11/2025
Summary of the review
The Best Air Humidifiers 2026 | Tested by Lavelab
(Translated)Show original
L
lavelab.com
17/11/2025
Summary of the review
The Best Air Humidifiers 2026 | Tested by Lavelab
(Translated)Show original

Third-party reviews

Based on 10,000+ ratings from across the web.
Reviews last updated: August 2026 · How we calculate this

What we like about LEVOIT OasisMist 450S

  • Dual mist functionality offering both warm and cool mist options.
  • Powerful and fast humidification capable of covering medium to large rooms quickly.
  • Convenient top-fill design that prevents messy spills and makes refilling easy.
  • Excellent smart integration via the VeSync app for scheduling and remote tracking.
  • Whisper-quiet operation especially while running on the low cool mist setting.
  • Dual 360-degree rotating nozzles that allow precise direction of the mist output.
  • Built-in aromatherapy tray for adding essential oils.

What we don't like about LEVOIT OasisMist 450S

  • High power consumption and energy use when running the warm mist setting continuously.
  • Shorter runtime and frequent refills required when both warm and cool modes blast together.
  • Risk of white mineral dust build-up unless distilled or reverse osmosis water is used.
  • Base unit cleaning can be tedious due to several tight nooks, crannies, and components.
  • Warm mist mode slightly increases the operational noise level with a boiling or clicking sound.
  • Built-in humidistat sensor can sometimes read slightly higher or different from actual room levels.

Verdict

The LEVOIT OasisMist 450S is a smart ultrasonic hybrid humidifier featuring a 4.5-liter (1.19-gallon) top-fill water tank, a powerful 550 mL/h mist output, and a rated power of 280W, designed to effectively cover rooms between 215 to 430 square feet. Its main characteristics and advantages include dual warm and cool mist settings, dual 360-degree rotating nozzles, an automatic mode governed by built-in humidity sensors, a dedicated aromatherapy box, smart control via the VeSync app with voice assistant compatibility, and ultra-quiet operation starting at under 26 decibels with a maximum runtime of up to 45 hours on low cool mist. However, notable drawbacks include high power consumption during warm mist operation, a significantly reduced runtime of under 20 hours when using both mist modes simultaneously, a risk of white mineral dust buildup if distilled water is not used, and a few tight internal spots within the base chamber that complicate manual descaling and deep cleaning.

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