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Xiaomi Mi Smart Humidifier 2 Review | 43 Data compared

Avg. price: ~£45
Humidification rate: 350 ml/h
Maximum room area: 25 m²
Water tank capacity: 4.5 L
Maximum operating time: 32 hours
Maximum noise level: 38 dB

Xiaomi Mi Smart Humidifier 2 review. Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

7.5

Very good

7.6

Very good

7.0

Very good

7.2
Bedroom use
Score components:
35.0%
4.5
Maximum noise level
25.0%
6.5
Maximum operating time
20.0%
10
Timer
20.0%
10
Automatic low-water shut-off
7.1
Large rooms
Score components:
35.0%
8.7
Humidification rate
30.0%
3.8
Maximum room area
25.0%
7.6
Water tank capacity
10.0%
10
Hygrostat
9.1
Plant care
Score components:
30.0%
10
Hygrostat
25.0%
8.7
Humidification rate
25.0%
7.6
Water tank capacity
20.0%
10
360° nozzle

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Verdict

The Xiaomi Smart Humidifier 2 is an ultrasonic air humidifier featuring a 4.5L water tank, a 350 mL/h humidification rate, and a 28W rated power input. Main characteristics and pros include integrated UV-C ultraviolet technology that eliminates up to 99.9% of bacteria in the water, a 360-degree adjustable dual rotating mist dispenser, a dedicated hidden aromatherapy box, a continuous runtime of up to 32 hours, a convenient top-fill design, and smart Wi-Fi control via the Mi Home app. It operates quietly at a noise level of 32 to 38 dB, though a key con is its lack of a built-in display to show the room's current ambient humidity percentage directly on the unit, forcing users to rely on the smartphone app or external Xiaomi sensors to track specific humidity metrics.

Technical Specifications of humidifier Xiaomi Mi Smart Humidifier 2

Overall score

7.5

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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

7.0

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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

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

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

8.5

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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

7.0

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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

ABS

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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Xiaomi Mi Smart Humidifier 2 vs the average humidifier

Why is Xiaomi Mi Smart Humidifier 2 better than the average humidifier?

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Wi-Fi control
Xiaomi Mi Smart Humidifier 2 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
Xiaomi Mi Smart Humidifier 2 supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
Voice control supported
Xiaomi Mi Smart Humidifier 2 supports voice control; the average humidifier does not support voice control.
Supports Amazon Alexa and Google Assistant.
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
Xiaomi Mi Smart Humidifier 2 supports voice control; the average humidifier does not support voice control.
Hygrostat included
Xiaomi Mi Smart Humidifier 2 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
Xiaomi Mi Smart Humidifier 2 has a hygrostat; the average humidifier has no hygrostat.
34.6% higher humidification rate
Xiaomi Mi Smart Humidifier 2 delivers a higher humidification rate than the average humidifier (350 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
Xiaomi Mi Smart Humidifier 2 delivers a higher humidification rate than the average humidifier (350 ml/h vs 260 ml/h).350 ml/h vs 260 ml/h
Washable filter
Xiaomi Mi Smart Humidifier 2 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
Xiaomi Mi Smart Humidifier 2 includes a washable filter; the average humidifier does not include a washable filter.
Dedicated aroma compartment
Xiaomi Mi Smart Humidifier 2 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.
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
Xiaomi Mi Smart Humidifier 2 includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
1.15 L larger water tank
Xiaomi Mi Smart Humidifier 2 has a larger water tank than the average humidifier (4.5 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
Xiaomi Mi Smart Humidifier 2 has a larger water tank than the average humidifier (4.5 L vs 3.35 L).4.5 L vs 3.35 L
8 hours longer runtime
Xiaomi Mi Smart Humidifier 2 runs longer on a single fill than the average humidifier (32 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
Xiaomi Mi Smart Humidifier 2 runs longer on a single fill than the average humidifier (32 hours vs 24 hours).32 hours vs 24 hours
Hygrostat included
Xiaomi Mi Smart Humidifier 2 has a hygrostat; the average humidifier has no hygrostat.
34.6% higher humidification rate
Xiaomi Mi Smart Humidifier 2 delivers a higher humidification rate than the average humidifier (350 ml/h vs 260 ml/h).
1.15 L larger water tank
Xiaomi Mi Smart Humidifier 2 has a larger water tank than the average humidifier (4.5 L vs 3.35 L).
8 hours longer runtime
Xiaomi Mi Smart Humidifier 2 runs longer on a single fill than the average humidifier (32 hours vs 24 hours).
Wi-Fi control
Xiaomi Mi Smart Humidifier 2 supports Wi-Fi control; the average humidifier does not support Wi-Fi control.
Voice control supported
Xiaomi Mi Smart Humidifier 2 supports voice control; the average humidifier does not support voice control.
Washable filter
Xiaomi Mi Smart Humidifier 2 includes a washable filter; the average humidifier does not include a washable filter.
Dedicated aroma compartment
Xiaomi Mi Smart Humidifier 2 includes a dedicated aroma compartment; the average humidifier does not include a dedicated aroma compartment.
12 hours longer timer
Xiaomi Mi Smart Humidifier 2 provides a longer timer setting than the average humidifier (24 hours vs 12 hours).
0.56 cm narrower body
Xiaomi Mi Smart Humidifier 2 has a narrower body than the average humidifier (19 cm vs 19.555 cm).

Why is Xiaomi Mi Smart Humidifier 2 worse than the average humidifier?

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4.9 dB higher maximum noise
Xiaomi Mi Smart Humidifier 2 is louder at maximum output than the average humidifier (38 dB vs 33.1 dB).
6 m² less room coverage
Xiaomi Mi Smart Humidifier 2 covers smaller rooms than the average humidifier (25 m² vs 31 m²).
4 W higher power draw
Xiaomi Mi Smart Humidifier 2 draws more power than the average humidifier (28 W vs 24 W).
10 % RH lower target humidity
Xiaomi Mi Smart Humidifier 2 supports a lower maximum target humidity than the average humidifier (70% RH vs 80% RH).
No LED lighting
Xiaomi Mi Smart Humidifier 2 does not feature LED lighting; the average humidifier features LED lighting.
4.52 cm taller body
Xiaomi Mi Smart Humidifier 2 stands taller than the average humidifier (33.5 cm vs 28.98 cm).
0.01 m shorter power cable
Xiaomi Mi Smart Humidifier 2 has a shorter power cable than the average humidifier (1.5 m vs 1.51 m).
0.75 cm deeper body
Xiaomi Mi Smart Humidifier 2 has a deeper profile than the average humidifier (19 cm vs 18.25 cm).
6.1% heavier
Xiaomi Mi Smart Humidifier 2 is heavier than the average humidifier (1.6 kg vs 1.48 kg).
4.9 dB higher maximum noise
Xiaomi Mi Smart Humidifier 2 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
Xiaomi Mi Smart Humidifier 2 is louder at maximum output than the average humidifier (38 dB vs 33.1 dB).38 dB vs 33.1 dB
6 m² less room coverage
Xiaomi Mi Smart Humidifier 2 covers smaller rooms than the average humidifier (25 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
Xiaomi Mi Smart Humidifier 2 covers smaller rooms than the average humidifier (25 m² vs 31 m²).25 m² vs 31 m²
No LED lighting
Xiaomi Mi Smart Humidifier 2 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
Xiaomi Mi Smart Humidifier 2 does not feature LED lighting; the average humidifier features LED lighting.
4 W higher power draw
Xiaomi Mi Smart Humidifier 2 draws more power than the average humidifier (28 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
Xiaomi Mi Smart Humidifier 2 draws more power than the average humidifier (28 W vs 24 W).28 W vs 24 W
4.52 cm taller body
Xiaomi Mi Smart Humidifier 2 stands taller than the average humidifier (33.5 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
Xiaomi Mi Smart Humidifier 2 stands taller than the average humidifier (33.5 cm vs 28.98 cm).33.5 cm vs 28.98 cm
10 % RH lower target humidity
Xiaomi Mi Smart Humidifier 2 supports a lower maximum target humidity than the average humidifier (70% RH vs 80% RH).
What it is: The highest relative-humidity target the user can select.
When it matters: A higher maximum target offers more range for very dry conditions, plant rooms, or specific humidity needs.
Importance: LOW
Good value: At least 80% RH
Xiaomi Mi Smart Humidifier 2 supports a lower maximum target humidity than the average humidifier (70% RH vs 80% RH).70 % RH vs 80 % RH
0.01 m shorter power cable
Xiaomi Mi Smart Humidifier 2 has a shorter power cable than the average humidifier (1.5 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
Xiaomi Mi Smart Humidifier 2 has a shorter power cable than the average humidifier (1.5 m vs 1.51 m).1.5 m vs 1.51 m
0.75 cm deeper body
Xiaomi Mi Smart Humidifier 2 has a deeper profile than the average humidifier (19 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
Xiaomi Mi Smart Humidifier 2 has a deeper profile than the average humidifier (19 cm vs 18.25 cm).19 cm vs 18.25 cm

Graphic comparison of Xiaomi Mi Smart Humidifier 2 and other products in the Humidifiers category

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Third-party reviews

United Kingdom

United States

(Reviews last updated: August 2026)

What customers like about Xiaomi Mi Smart Humidifier 2?

Large 4.5L water tank capacity allows for long continuous runtime without frequent refills.
Very quiet operation (around 32dB), making it highly suitable for use in bedrooms at night.
Convenient top-filling design allows water to be added easily without removing the lid.
Seamless integration with the Xiaomi Home app and voice assistants like Alexa for remote control and automation.
Powerful mist output (up to 350 ml/h) that quickly relieves dryness in medium-to-large rooms.
Built-in UV-C sterilization system effectively eliminates bacteria for a cleaner mist.
Features a 360-degree adjustable dual rotating mist nozzle for efficient distribution.
Includes a dedicated aromatherapy compartment for adding essential oils.

What customers dislike about Xiaomi Mi Smart Humidifier 2?

The power cord is permanently attached and criticized by some users for being too short.
The 'keep constant humidity' algorithm doesn't turn off completely; it only drops to the minimum level, which can over-humidify small rooms.
The Xiaomi Home smartphone app requires an extensive number of device permissions during the initial setup.
Smart scheduling features fail to trigger if the local Wi-Fi network disconnects or turns off at night.
The internal compartments have tight areas that can make thorough deep cleaning somewhat demanding.
The built-in temperature sensor readings can occasionally be slightly inaccurate.
Occasional user complaints regarding localized leaking or condensation if not placed properly.

Expert reviews

stern.de

03/02/2026

Summary of the review

Humidifier Review: Five Top Models Compared by stern

In a Stern review of five humidifiers, the Xiaomi Smart Evaporative Humidifier emerged as the winner for its efficient performance and design, with the lineup praised for reliable humidity regulation and consistent room climate enhancement. While offering effective, smooth operation, the units require regular cleaning to prevent bacterial growth or mold, and users must account for frequent water tank refills based on usage.

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