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Products in this category are scored under Frontum Humidifiers Methodology v1.0: technical specifications plus authentic consumer ratings, with 0% commercial bias.
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SMARTDEVIL H2O Humidifier 2.02.01.0019 Review | 43 Data compared

Avg. price:~£20Humidification rate:50 ml/hMaximum room area:?Water tank capacity:0.5 LMaximum operating time:18 hoursMaximum noise level:30 dB

SMARTDEVIL H2O Humidifier 2.02.01.0019 Review: Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

SMARTDEVIL H2O Humidifier 2.02.01.0019
6.0/10

Overall score

Score
6.0/ 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 89% of models
Score components

80%

5.4

Technical score

20%

8.1

User score

â–¼Worse than 89% of humidifiers
7.2

Value for money

Value for money
7.2/ 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 75% of models
Score components

70%

6.0

Overall score

30%

10

Price

â–¼Worse than 75%
5.4

Technical score

Technical score
5.4/ 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 93% of models
Score components

45%

4.3

Performance

40%

5.8

Features

15%

7.7

Design

â–¼Worse than 93%
8.1

User score

User score
8.1/ 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–² Better than 64% of models
Score components

70%

8.0

User ratings

30%

8.2

Number of reviews

Based on ratings from across the web.
â–²Better than 64%
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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 SMARTDEVIL H2O Humidifier 2.02.01.0019

Technical score
Technical score
5.4/ 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 93% of models
Score components:

45%

4.3

Performance

40%

5.8

Features

15%

7.7

Design

5.4
User score
User score
8.1/ 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–² Better than 64% of models
Score components

70%

8.0

User ratings

30%

8.2

Number of reviews

Based on ratings from across the web.
8.1
Popularity
Popularity
8.2/ 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–² Better than 77% of models
Popularity:
SMARTDEVIL H2O Humidifier 2.02.01.0019 has a popularity score of 8.2 points, which is higher than 77.2% of products in this category.
8.2
Value for money
Value for money
7.2/ 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 75% of models
Score components:

70%

6.0

Overall score

30%

10

Price

7.2
Technology
evaporative
Humidification rate
50 ml/h
Market range: <50 ml/h – >500 ml/h
This humidifier delivers a humidification rate of 50 ml/h, which is lower than that of 82.9% of humidifiers and equal to that of 12.1% of humidifiers.
Maximum room area
?
Water tank capacity
0.5 L
Market range: <0.4 L – >6.5 L
This humidifier has a water tank capacity of 0.5 L, which is smaller than that of 81.2% of humidifiers and equal to that of 6.7% of humidifiers.
Maximum operating time
18 hours
Market range: <8 hours – >60 hours
This humidifier runs for up to 18 hours on a single fill, which is shorter than 61.7% of humidifiers and equal to that of 3.4% 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
no
This humidifier does not support aromatherapy. Aromatherapy support is available in 74.5% of humidifiers.
Dedicated aroma compartment
no
This humidifier does not include a dedicated aroma compartment. A dedicated aroma compartment is present in 49% 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
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
grey
Material
plastic
360° nozzle
no
This humidifier does not have a 360° nozzle. A 360° nozzle is included in 58.4% of humidifiers.
Display
no
This humidifier does not have a display. A display is included in 44.3% of humidifiers.
Show more

SMARTDEVIL H2O Humidifier 2.02.01.0019 vs the average humidifier

246810TotalPerformanceFeaturesDesign
  • 84.5% lighter
    This humidifier is lighter than the average humidifier (0.2 kg vs 1.48 kg).
    0.23 kg vs 1.48 kg
  • 10.06 cm narrower body
    This humidifier has a narrower body than the average humidifier (9.5 cm vs 19.6 cm).
    9.5 cm vs 19.555 cm
  • 8.75 cm shallower body
    This humidifier has a shallower depth than the average humidifier (9.5 cm vs 18.25 cm).
    9.5 cm vs 18.25 cm
  • 19 W lower power draw
    This humidifier draws less power than the average humidifier (5 W vs 24 W).
    5 W vs 24 W
  • 16.08 cm shorter body
    This humidifier has a lower profile than the average humidifier (12.9 cm vs 28.98 cm).
    12.9 cm vs 28.98 cm
  • 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
  • 75% cheaper
    SMARTDEVIL H2O Humidifier 2.02.01.0019 is cheaper than the average humidifier (£20 vs £35).
    £20 vs £35
  • 28.1% more popular
    SMARTDEVIL H2O Humidifier 2.02.01.0019 is more popular than the average humidifier (8.19 vs 6.4).
    8.19 vs 6.4
  • 75% cheaper
    SMARTDEVIL H2O Humidifier 2.02.01.0019 is cheaper than the average humidifier (£20 vs £35).
    £20 vs £35
  • 28.1% more popular
    SMARTDEVIL H2O Humidifier 2.02.01.0019 is more popular than the average humidifier (8.19 vs 6.4).
    8.19 vs 6.4
  • 0.9% higher user score
    User score
    8.1/ 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
    SMARTDEVIL H2O Humidifier 2.02.01.0019
    the average humidifier
    SMARTDEVIL H2O Humidifier 2.02.01.0019 has a higher user score than the average humidifier (8.07 vs 8.000).
    8.07 vs 8
  • 19 W lower power draw
    This humidifier draws less power than the average humidifier (5 W vs 24 W).
    5 W vs 24 W
  • 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
  • 84.5% lighter
    This humidifier is lighter than the average humidifier (0.2 kg vs 1.48 kg).
    0.23 kg vs 1.48 kg
  • 10.06 cm narrower body
    This humidifier has a narrower body than the average humidifier (9.5 cm vs 19.6 cm).
    9.5 cm vs 19.555 cm
  • 8.75 cm shallower body
    This humidifier has a shallower depth than the average humidifier (9.5 cm vs 18.25 cm).
    9.5 cm vs 18.25 cm
  • 16.08 cm shorter body
    This humidifier has a lower profile than the average humidifier (12.9 cm vs 28.98 cm).
    12.9 cm vs 28.98 cm
  • 80.8% lower humidification rate
    This humidifier delivers a lower humidification rate than the average humidifier (50 ml/h vs 260 ml/h).
    50 ml/h vs 260 ml/h
  • No timer
    This humidifier does not include a programmable timer; the average humidifier includes a programmable timer.
  • 2.85 L smaller water tank
    This humidifier has a smaller water tank than the average humidifier (0.5 L vs 3.35 L).
    0.5 L vs 3.35 L
  • No aromatherapy support
    This humidifier does not support aromatherapy; the average humidifier supports aromatherapy.
  • 2 levels less mist control
    This humidifier offers fewer mist adjustment levels than the average humidifier (1 levels vs 3 levels).
    1 levels vs 3 levels
  • No 360° nozzle
    This humidifier does not have a 360° nozzle; the average humidifier has a 360° nozzle.
  • 0.51 m shorter power cable
    This humidifier has a shorter power cable than the average humidifier (1 m vs 1.51 m).
    1 m vs 1.51 m
  • 6 hours shorter runtime
    This humidifier runs for a shorter time than the average humidifier (18 hours vs 24 hours).
    18 hours vs 24 hours
  • 5.5% worse value for money
    SMARTDEVIL H2O Humidifier 2.02.01.0019 offers worse value for money than the average humidifier (7.17 vs 7.6).
    7.17 vs 7.56
  • 80.8% lower humidification rate
    This humidifier delivers a lower humidification rate than the average humidifier (50 ml/h vs 260 ml/h).
    50 ml/h vs 260 ml/h
  • 2.85 L smaller water tank
    This humidifier has a smaller water tank than the average humidifier (0.5 L vs 3.35 L).
    0.5 L vs 3.35 L
  • 2 levels less mist control
    This humidifier offers fewer mist adjustment levels than the average humidifier (1 levels vs 3 levels).
    1 levels vs 3 levels
  • 6 hours shorter runtime
    This humidifier runs for a shorter time than the average humidifier (18 hours vs 24 hours).
    18 hours vs 24 hours
  • No timer
    This humidifier does not include a programmable timer; the average humidifier includes a programmable timer.
  • No aromatherapy support
    This humidifier does not support aromatherapy; the average humidifier supports aromatherapy.
  • No 360° nozzle
    This humidifier does not have a 360° nozzle; the average humidifier has a 360° nozzle.
  • 0.51 m shorter power cable
    This humidifier has a shorter power cable than the average humidifier (1 m vs 1.51 m).
    1 m vs 1.51 m

Third-party reviews

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

What we like about SMARTDEVIL H2O Humidifier 2.02.01.0019

  • Whisper-quiet operation under 30 decibels makes it ideal for sleep or workspace use
  • Compact and highly portable desktop layout suitable for travel, bedrooms, and offices
  • Effective at relieving dry sinus passages, dry skin, and chapped lips
  • Features a built-in soft nightlight with constant and breathing illumination settings
  • Automatic safety shut-off activates reliably when the water tank level runs low
  • Offers two distinct misting profiles including continuous and intermittent spray modes

What we don't like about SMARTDEVIL H2O Humidifier 2.02.01.0019

  • Strictly bans the usage of distilled or pure water as it causes buildup at the mist outlet
  • The tight, water-resistant casing can make twisting it open to refill quite difficult and stiff
  • Manufacturer advises against adding essential oils as they can clog the replaceable filters
  • Lacks an exterior viewing window or clear water level gauge to easily check remaining volume
  • Does not include an AC wall power adapter in the package, shipping only with a USB cable

Verdict

The SMARTDEVIL H2O Humidifier is a portable, ultrasonic cool-mist desktop unit featuring a 500ml water tank capacity, a 5V DC micro-USB power input, and a power consumption of 2W max. Operating via a one-touch button control, it provides a spray volume of 30-60mL/H across two distinct modes, delivering up to 12 hours of runtime on continuous mist and 18 hours on intermittent mist. Key pros include a whisper-quiet noise level of under 26-28dB, an integrated warm LED nightlight with both constant and breathing modes, a built-in safety probe for waterless automatic shut-off, and an automatic 8-hour operation timer. However, notable cons include its strict requirement for corded power since it does not contain a built-in battery, the restriction against using distilled or pure water to prevent outlet clogging, and a manufacturing warning against adding essential oils directly into the water tank to avoid damaging the internal filter cotton swab.

Compare SMARTDEVIL H2O Humidifier 2.02.01.0019 with other products in the Humidifiers category

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