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Dreo Humidifier HM311 4L Review | 43 Data compared

Avg. price:~£45Humidification rate:250 ml/hMaximum room area:27.87 m²Water tank capacity:4 LMaximum operating time:36 hoursMaximum noise level:32 dB

Dreo Humidifier HM311 4L Review: Compare 43 technical specifications and user reviews to see how this product ranks in the Humidifiers category and whether it is worth buying.

Dreo Humidifier HM311 4L
6.9/10

Overall score

Score
6.9/ 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–² Better than 51% of models
Score components

80%

6.4

Technical score

20%

9.1

User score

â–²Better than 51% of humidifiers
7.7

Value for money

Value for money
7.7/ 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 54% of models
Score components

70%

6.9

Overall score

30%

9.4

Price

â–²Better than 54%
6.4

Technical score

Technical score
6.4/ 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 61% of models
Score components

45%

6.4

Performance

40%

6.5

Features

15%

6.2

Design

â–¼Worse than 61%
9.1

User score

User score
9.1/ 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
★ Better than 93% of models
Score components

70%

8.8

User ratings

30%

9.7

Number of reviews

Based on ratings from across the web.
★Better than 93%
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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 Dreo Humidifier HM311 4L

Technical score
Technical score
6.4/ 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 61% of models
Score components:

45%

6.4

Performance

40%

6.5

Features

15%

6.2

Design

6.4
User score
User score
9.1/ 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
★ Better than 93% of models
Score components

70%

8.8

User ratings

30%

9.7

Number of reviews

Based on ratings from across the web.
9.1
Popularity
Popularity
9.7/ 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 89% of models
Popularity:
Dreo Humidifier HM311 4L has a popularity score of 9.7 points, which is higher than 88.6% of products in this category.
9.7
Value for money
Value for money
7.7/ 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 54% of models
Score components:

70%

6.9

Overall score

30%

9.4

Price

7.7
Technology
ultrasonic
Humidification rate
250 ml/h
Market range: <50 ml/h – >500 ml/h
This humidifier delivers a humidification rate of 250 ml/h, which is lower than that of 52.9% of humidifiers and equal to that of 4.3% of humidifiers.
Maximum room area
27.87 m²
Market range: <20 m² – >60 m²
This humidifier covers rooms up to 27.87 m², which is smaller than that of 68.3% of humidifiers and equal to that of 2.1% of humidifiers.
Water tank capacity
4 L
Market range: <0.4 L – >6.5 L
This humidifier has a water tank capacity of 4 L, which is larger than that of 57.7% of humidifiers and equal to that of 7.4% of humidifiers.
Maximum operating time
36 hours
Market range: <8 hours – >60 hours
This humidifier runs for up to 36 hours on a single fill, which is longer than 69.8% of humidifiers and equal to that of 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
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
black
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

Dreo Humidifier HM311 4L vs the average humidifier

246810TotalPerformanceFeaturesDesign
  • 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.
  • 12 hours longer runtime
    This humidifier runs longer on a single fill than the average humidifier (36 hours vs 24 hours).
    36 hours vs 24 hours
  • 4.25 cm shallower body
    This humidifier has a shallower depth than the average humidifier (14 cm vs 18.25 cm).
    14 cm vs 18.25 cm
  • 0.65 L larger water tank
    This humidifier has a larger water tank than the average humidifier (4 L vs 3.35 L).
    4 L vs 3.35 L
  • 3.18 cm shorter body
    This humidifier has a lower profile than the average humidifier (25.8 cm vs 28.98 cm).
    25.8 cm vs 28.98 cm
  • 13.5% higher user score
    User score
    9.1/ 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
    Dreo Humidifier HM311 4L
    the average humidifier
    Dreo Humidifier HM311 4L has a higher user score than the average humidifier (9.08 vs 8.000).
    9.08 vs 8
  • 52.1% more popular
    Dreo Humidifier HM311 4L is more popular than the average humidifier (9.73 vs 6.4).
    9.73 vs 6.4
  • 1.1 dB lower maximum noise
    This humidifier is quieter at maximum output than the average humidifier (32 dB vs 33.1 dB).
    32 dB vs 33.1 dB
  • 13.5% higher user score
    User score
    9.1/ 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
    Dreo Humidifier HM311 4L
    the average humidifier
    Dreo Humidifier HM311 4L has a higher user score than the average humidifier (9.08 vs 8.000).
    9.08 vs 8
  • 52.1% more popular
    Dreo Humidifier HM311 4L is more popular than the average humidifier (9.73 vs 6.4).
    9.73 vs 6.4
  • 1.5% better value for money
    Dreo Humidifier HM311 4L offers better value for money than the average humidifier (7.67 vs 7.6).
    7.67 vs 7.56
  • 12 hours longer runtime
    This humidifier runs longer on a single fill than the average humidifier (36 hours vs 24 hours).
    36 hours vs 24 hours
  • 0.65 L larger water tank
    This humidifier has a larger water tank than the average humidifier (4 L vs 3.35 L).
    4 L vs 3.35 L
  • 1.1 dB lower maximum noise
    This humidifier is quieter at maximum output than the average humidifier (32 dB vs 33.1 dB).
    32 dB vs 33.1 dB
  • 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.
  • 4.25 cm shallower body
    This humidifier has a shallower depth than the average humidifier (14 cm vs 18.25 cm).
    14 cm vs 18.25 cm
  • 3.18 cm shorter body
    This humidifier has a lower profile than the average humidifier (25.8 cm vs 28.98 cm).
    25.8 cm vs 28.98 cm
  • 4.7% lighter
    This humidifier is lighter than the average humidifier (1.4 kg vs 1.48 kg).
    1.41 kg vs 1.48 kg
  • No timer
    This humidifier does not include a programmable timer; the average humidifier includes a programmable timer.
  • 8.45 cm wider body
    This humidifier has a wider body than the average humidifier (28 cm vs 19.6 cm).
    28 cm vs 19.555 cm
  • No 360° nozzle
    This humidifier does not have a 360° nozzle; the average humidifier has a 360° nozzle.
  • 3.13 m² less room coverage
    This humidifier covers smaller rooms than the average humidifier (27.9 m² vs 31 m²).
    27.87 m² vs 31 m²
  • 2 W higher power draw
    This humidifier draws more power than the average humidifier (26 W vs 24 W).
    26 W vs 24 W
  • 0.01 m shorter power cable
    This humidifier has a shorter power cable than the average humidifier (1.5 m vs 1.51 m).
    1.5 m vs 1.51 m
  • 3.8% lower humidification rate
    This humidifier delivers a lower humidification rate than the average humidifier (250 ml/h vs 260 ml/h).
    250 ml/h vs 260 ml/h
  • 28.6% more expensive
    Dreo Humidifier HM311 4L is more expensive than the average humidifier (£45 vs £35).
    £45 vs £35
  • 28.6% more expensive
    Dreo Humidifier HM311 4L is more expensive than the average humidifier (£45 vs £35).
    £45 vs £35
  • 3.13 m² less room coverage
    This humidifier covers smaller rooms than the average humidifier (27.9 m² vs 31 m²).
    27.87 m² vs 31 m²
  • 2 W higher power draw
    This humidifier draws more power than the average humidifier (26 W vs 24 W).
    26 W vs 24 W
  • 3.8% lower humidification rate
    This humidifier delivers a lower humidification rate than the average humidifier (250 ml/h vs 260 ml/h).
    250 ml/h vs 260 ml/h
  • No timer
    This humidifier does not include a programmable timer; the average humidifier includes a programmable timer.
  • 8.45 cm wider body
    This humidifier has a wider body than the average humidifier (28 cm vs 19.6 cm).
    28 cm vs 19.555 cm
  • No 360° nozzle
    This humidifier does not have a 360° nozzle; the average humidifier has a 360° nozzle.
  • 0.01 m shorter power cable
    This humidifier has a shorter power cable than the average humidifier (1.5 m vs 1.51 m).
    1.5 m vs 1.51 m

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
Dreo HM311 Review | Tested & Rated - TechGearLab
H
haus-garten-test.de
04/12/2025
Summary of the review
DREO Humidifier 311S Review – Smart with App Control
(Translated)Show original
H
homeandsmart.de
06/12/2024
Summary of the review
Dreo Humidifier Review – Top Ultrasonic Humidifiers for Your Smart Home
(Translated)Show original
E
electroworldlyon.fr
19/08/2025
Summary of the review
Dreo HM311 Humidifier at Electro World
(Translated)Show original
T
techgearlab.com
19/08/2025
Summary of the review
The Best Humidifiers | Lab Tested and Ranked
(Translated)Show original

Third-party reviews

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

What we like about Dreo Humidifier HM311 4L

  • Generates a powerful, fine mist that spreads evenly without wetting surrounding furniture.
  • Operates very quietly at around 28dB, making it excellent for bedrooms and nurseries.
  • Large 4-liter capacity provides an impressive runtime of up to 32 to 36 hours on low settings.
  • Convenient top-fill design simplifies water refills and eliminates messy spills.
  • Modular parts and wide opening make the water tank easy to detach and clean.
  • Features a built-in aroma pad for essential oils and a dual-purpose soothing ambient nightlight.

What we don't like about Dreo Humidifier HM311 4L

  • The top lid sits loosely on the unit and does not lock, making it prone to being knocked off easily.
  • Lacks a dedicated water level indicator light on the base model to view remaining water in the dark.
  • Prone to pink mold and mineral residue if not cleaned frequently every few days.
  • Can leave white dust on surfaces if operated using hard tap water instead of distilled water.
  • The base model (HM311) lacks a built-in automatic humidity sensor and Wi-Fi smart app integration.

Verdict

The Dreo Humidifier HM311 is a 26-watt ultrasonic cool mist humidifier featuring a 4-liter water tank, a 28 dB ultra-quiet noise rating, and an effective coverage range of up to 300 square feet. Key characteristics and pros include its 3-in-1 design combining a humidifier, an essential oil aroma diffuser pad, and an integrated nightlight, alongside a 4-inch wide mist outlet that shoots a 5μm ultrafine mist up to 40 inches high for a continuous runtime of 32 to 36 hours. Its convenient touch-controlled, top-fill modular design makes it remarkably easy to clean and refill without spilling water; however, notable cons include its loose, non-locking lid that can easily be knocked off, a lack of an included demineralization cartridge which can cause white dust when using hard water, and a power output that can feel slightly underpowered for larger spaces.

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