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MAKE ROOM FOR COMFORT.

A smaller tank.
Smart controls.
Your room, considered.

A four-litre top-fill cool-mist humidifier with a digital display, automatic control and DREO app / voice options. A lower-cost smart choice for a single-room routine.

4.412,252 Amazon ratings
4L top fillSmart humidistatApp / voice control
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Current price, availability and checkout on Amazon.

DREO / PRODUCT CLOSE-UPOriginal product photo · DREO / Amazon listing
4 LTank capacity
300 ft²Listing area field
28 dBLowest advertised noise
THE DETAILS THAT MATTER

A good find.
A closer look.

What it does, who it suits,
and what to check before you choose.

Black Dreo humidifier on a wooden coffee table emitting a tall mist column in a living room setting. Text reads 'Supersized mist hydrates your air instantly' with callouts for 40-inch High Mist and 4-inch Wide Mist.01

Controls that suit the routine

Use touch controls or the DREO app for mist, timer and light settings. Alexa and Google Assistant support are listed for compatible setups.

Promotional infographic for a Dreo humidifier showing a cutaway view of internal components. Text reads 'Supersized Mist. Natural Relief.' with three labeled features: 2.4MHz Atomizer (2X Finer mist), Smart humidistat (2X Higher precision), and Airflow booster (3X Higher efficiency).02

A smaller refill load

Four litres is less tank volume than the six- and eight-litre alternatives. Compare the amount you can comfortably carry and the space available for the tank.

Promotional banner for a black Dreo smart humidifier showing a smartphone app with scheduling controls. Text reads 'Tailor it to your lifestyle with smart schedules.' Works with Hey Google and Alexa badges shown.03

Treat runtime as conditional

Current text claims up to 36 hours, while the presentation references 32. Neither is a guaranteed overnight result at every output; check the current model instructions.

COULD THIS BE YOUR KIND OF FIND?

Made for
your everyday?

A single-room buyer who wants automatic and app controls at the lowest selected price in this humidifier shortlist.

Check the options
A LITTLE CONTEXT BEFORE YOU CHOOSE

Good to know.

  • Smaller tank than the six- and eight-litre options.
  • Optional cartridges add an ongoing purchase if used.
  • Listing and video runtime claims differ.
FROM THE AMAZON PRODUCT LISTING

Less guessing.
More seeing.

Watch the product demonstration.
Streamed directly from Amazon.

Amazon listing video · no locally hosted copyView product on Amazon ↗
THE PRACTICAL PART

The finer details.

Confirm the selected version, full specifications and included accessories on Amazon before ordering.

Model / finish
HM311S / Black
Technology
Ultrasonic cool mist
Tank
4 L, top fill
Optional extras
Model-compatible cartridges sold separately
Product reference
B0CCVX6FSD
AMAZON CUSTOMER PERSPECTIVES

What buyers say.

Snapshot checked October 25, 2026.
Ratings may include other variants.

The overall rating is a dated listing snapshot and may include other variants. Read the current buyer feedback for the selected version on Amazon.

BEFORE YOU CLICK

A few good
questions.

Clear information makes a better next step.

Are all DREO four-litre models smart?

No. This selection is HM311S; do not substitute the basic HM311.

Are cartridges a replacement for cleaning?

No. Follow the complete model-specific care instructions.

What runtime is listed?

Current text says up to 36 hours; the presentation uses a different maximum.

YOUR NEXT EVERYDAY UPGRADE

Found your fit?

Explore the DREO HM311S — 4L Smart Black on Amazon.

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DREO smart humidifier with transparent water tank glowing blue, black housing, and front touch panel displaying '62'. A smartphone showing the DREO app is positioned to the left.
DREO4L top fill
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Read the practical guide: Four litres or six? Choosing a smart humidifier around refills and controls ↗

Fit checks, everyday advice and what to consider before buying.

Compare the Top 5: Top 5 cool-mist humidifiers ↗

See where this model fits, with advantages, compromises and alternatives.