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SMARTDEVIL H2O Humidifier 2.02.01.0017 Review | 43 Data compared

Avg. price in UK: ~£20
Avg. price in US: ~$20
Humidification rate: 50 ml/h
Maximum room area: 10 m²
Water tank capacity: 0.5 L
Maximum operating time: 18 hours
Maximum noise level: 30 dB

SMARTDEVIL H2O Humidifier 2.02.01.0017 review. Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

5.6

Good

4.9

Poor

8.5

Excellent

6.6
Bedroom use
Score components:
35.0%
8.5
Maximum noise level
25.0%
3.4
Maximum operating time
20.0%
4.0
Timer
20.0%
10
Automatic low-water shut-off
1.4
Large rooms
Score components:
35.0%
1.0
Humidification rate
30.0%
1.0
Maximum room area
25.0%
1.3
Water tank capacity
10.0%
4.0
Hygrostat
2.6
Plant care
Score components:
30.0%
4.0
Hygrostat
25.0%
1.0
Humidification rate
25.0%
1.3
Water tank capacity
20.0%
4.0
360° nozzle

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Verdict

The SMARTDEVIL H2O Humidifier is a compact, ultrasonic cool-mist device featuring a 500ml water tank, a 2W maximum working power, and a DC 5V USB-powered connection that pushes a spray volume of 30mL to 60mL per hour. Main characteristics and pros include a whisper-quiet operation below 28dB, a built-in low-water safety probe for automatic shut-off, a dual-mode night light (constant and breathing modes), and two adjustable mist settings providing up to 12 hours of continuous or 18 hours of intermittent runtime. However, prominent cons include its strict restriction against using pure or distilled water to avoid mist outlet clogging, the manufacturer's warning against adding essential oils directly into the water tank, and the continuous need to remain plugged into a power source due to the lack of an internal battery.

Technical Specifications of humidifier SMARTDEVIL H2O Humidifier 2.02.01.0017

Overall score

5.6

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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.

Performance

3.1

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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

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

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

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

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Features

5.8

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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

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

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

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

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

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Design

7.7

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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

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

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

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SMARTDEVIL H2O Humidifier 2.02.01.0017 vs the average humidifier

Why is SMARTDEVIL H2O Humidifier 2.02.01.0017 better than the average humidifier?

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84.5% lighter
SMARTDEVIL H2O Humidifier 2.02.01.0017 is lighter than the average humidifier (0.2 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a narrower body than the average humidifier (9.5 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a narrower body than the average humidifier (9.5 cm vs 19.555 cm).9.5 cm vs 19.555 cm
8.75 cm shallower body
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a shallower depth than the average humidifier (9.5 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a shallower depth than the average humidifier (9.5 cm vs 18.25 cm).9.5 cm vs 18.25 cm
22 W lower power draw
SMARTDEVIL H2O Humidifier 2.02.01.0017 draws less power than the average humidifier (2 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 draws less power than the average humidifier (2 W vs 24 W).2 W vs 24 W
16.08 cm shorter body
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a lower profile than the average humidifier (12.9 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 is quieter at maximum output than the average humidifier (30 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 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 2.02.01.0017 is cheaper than the average humidifier (£20 vs £35).
SMARTDEVIL H2O Humidifier 2.02.01.0017 is cheaper than the average humidifier (£20 vs £35).£20 vs £35
80.7% more popular
SMARTDEVIL H2O Humidifier 2.02.01.0017 is more popular than the average humidifier (10 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.
SMARTDEVIL H2O Humidifier 2.02.01.0017 is more popular than the average humidifier (10 vs 5.535).10 vs 5.54
22 W lower power draw
SMARTDEVIL H2O Humidifier 2.02.01.0017 draws less power than the average humidifier (2 W vs 24 W).
3.1 dB lower maximum noise
SMARTDEVIL H2O Humidifier 2.02.01.0017 is quieter at maximum output than the average humidifier (30 dB vs 33.1 dB).
84.5% lighter
SMARTDEVIL H2O Humidifier 2.02.01.0017 is lighter than the average humidifier (0.2 kg vs 1.48 kg).
10.06 cm narrower body
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a narrower body than the average humidifier (9.5 cm vs 19.555 cm).
8.75 cm shallower body
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a shallower depth than the average humidifier (9.5 cm vs 18.25 cm).
16.08 cm shorter body
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a lower profile than the average humidifier (12.9 cm vs 28.98 cm).

Why is SMARTDEVIL H2O Humidifier 2.02.01.0017 worse than the average humidifier?

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80.8% lower humidification rate
SMARTDEVIL H2O Humidifier 2.02.01.0017 delivers a lower humidification rate than the average humidifier (50 ml/h vs 260 ml/h).
21 m² less room coverage
SMARTDEVIL H2O Humidifier 2.02.01.0017 covers smaller rooms than the average humidifier (10 m² vs 31 m²).
2.85 L smaller water tank
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a smaller water tank than the average humidifier (0.5 L vs 3.35 L).
2 levels less mist control
SMARTDEVIL H2O Humidifier 2.02.01.0017 offers fewer mist adjustment levels than the average humidifier (1 levels vs 3 levels).
6 hours shorter runtime
SMARTDEVIL H2O Humidifier 2.02.01.0017 runs for a shorter time than the average humidifier (18 hours vs 24 hours).
No timer
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not include a programmable timer; the average humidifier includes a programmable timer.
No aromatherapy support
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not support aromatherapy; the average humidifier supports aromatherapy.
No 360° nozzle
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not have a 360° nozzle; the average humidifier has a 360° nozzle.
0.51 m shorter power cable
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a shorter power cable than the average humidifier (1 m vs 1.51 m).
80.8% lower humidification rate
SMARTDEVIL H2O Humidifier 2.02.01.0017 delivers a lower humidification rate than the average humidifier (50 ml/h vs 260 ml/h).
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
SMARTDEVIL H2O Humidifier 2.02.01.0017 delivers a lower humidification rate than the average humidifier (50 ml/h vs 260 ml/h).50 ml/h vs 260 ml/h
21 m² less room coverage
SMARTDEVIL H2O Humidifier 2.02.01.0017 covers smaller rooms than the average humidifier (10 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 covers smaller rooms than the average humidifier (10 m² vs 31 m²).10 m² vs 31 m²
No timer
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not include a programmable timer; the average humidifier includes a programmable timer.
What it is: Indicates whether the humidifier includes a timer for scheduled operation or shut-off.
When it matters: A timer helps you limit overnight runtime or arrange operation around your routine.
Importance: HIGH
Good value: yes
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not include a programmable timer; the average humidifier includes a programmable timer.
2.85 L smaller water tank
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a smaller water tank than the average humidifier (0.5 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not support aromatherapy; the average humidifier supports aromatherapy.
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
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not support aromatherapy; the average humidifier supports aromatherapy.
2 levels less mist control
SMARTDEVIL H2O Humidifier 2.02.01.0017 offers fewer mist adjustment levels than the average humidifier (1 levels vs 3 levels).
What it is: The number of manually selectable mist-output levels.
When it matters: More levels provide finer control over moisture output, noise, and water use.
Importance: MEDIUM
Good value: At least 3 levels
SMARTDEVIL H2O Humidifier 2.02.01.0017 offers fewer mist adjustment levels than the average humidifier (1 levels vs 3 levels).1 levels vs 3 levels
No 360° nozzle
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not have a 360° nozzle; the average humidifier has a 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
SMARTDEVIL H2O Humidifier 2.02.01.0017 does not have a 360° nozzle; the average humidifier has a 360° nozzle.
0.51 m shorter power cable
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a shorter power cable than the average humidifier (1 m vs 1.51 m).
What it is: The usable length of the humidifier’s power cable.
When it matters: A longer cable offers more freedom to place the humidifier away from a wall socket.
Importance: LOW
Good value: At least 1.5 m
SMARTDEVIL H2O Humidifier 2.02.01.0017 has a shorter power cable than the average humidifier (1 m vs 1.51 m).1 m vs 1.51 m

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Third-party reviews

United Kingdom

United States

(Reviews last updated: August 2026)

What customers like about SMARTDEVIL H2O Humidifier 2.02.01.0017?

Easy to set up, operate, and use with a simple one-button control
Whisper-quiet operation makes it ideal for bedrooms and office desks
Compact and lightweight design ensures great portability for travel
Built-in night light function offers useful constant or breathing light modes
Effective mist output directly helps relieve dry skin and sinus issues
Reliable waterless auto-shutoff mechanism prevents dry burning safety hazards
Impressive water efficiency with intermittent mode lasting up to 18 hours

What customers dislike about SMARTDEVIL H2O Humidifier 2.02.01.0017?

Strictly restricted from using essential oils as they clog the filter
Cannot be used with distilled or pure water due to leakage and buildup risks
Stiff unit construction makes taking it apart to refill water difficult
Lacks a clear window view making it hard to check remaining water levels
Does not include an AC wall adapter inside the packaging

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