# DREO 4L Smart Cool-Mist Humidifier

The DREO 4L Smart Humidifier is a top-fill ultrasonic cool-mist model with app and voice controls. Its 4-litre capacity and listed 32-hour runtime suit buyers seeking a bedroom humidifier with remote adjustment, though the listing gives conflicting runtime claims.

- [Original product page](https://bargainpostbox.co.uk/product/dreo-4l-smart-cool-mist-humidifier)
- [View offer](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: DREO
- Model: '4L Smart Humidifier'
- Category: Home & Kitchen > Heating, Cooling & Air Quality > Humidifiers & Dehumidifiers
- Price: 49.99 GBP
- Previous price: 59.99 GBP
- Discount: 17%
- Price checked: 2026-11-13T05:59:13.150Z
- Rating: 4.3 / 5
- Reviews: 28212

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Top-fill design is intended to make refilling easier without turning the tank over.
- The listing describes app and voice control, a timer, digital display, humidistat and automatic mode.
- An aroma tray is listed for use with essential oils.
- A demineralisation cartridge is compatible, but the listing says it is not included.

## Pros

- The 4-litre tank and top-fill design offer a practical combination for routine bedroom use.
- App and voice controls allow adjustments without relying only on onboard controls.
- A pre-filter, removable modular design and included cleaning brush support upkeep.

## Specifications

### Identity
- Brand: DREO
- Model: '4L Smart Humidifier'
### Humidification
- Capacity: 4 litres
- Operation mode: Ultrasonic
- Coverage listed: 300 Square Feet
- Filter type: Pre Filter
- Runtime listed: 32 hours
### Connectivity and controls
- Control methods listed: App, Voice
### Power and battery
- Power configuration: ac
- Voltage: 120 Volts
- Wattage: 25 watts
### Dimensions and installation
- Dimensions: 28D x 14W x 25.8H centimetres
- Weight listed: 3.13 Pounds
### Materials and appearance
- Colour: Black
- Material listed: Acrylonitrile Butadiene Styrene
- Shape: Rectangular

## Before you buy

- Listing details are inconsistent: the technical details give a 32-hour runtime, while the product highlights and feature text claim 36 hours. The listing also describes coverage as 300 Square Feet and calls it suitable for a large room without establishing the conditions behind that claim. Check the runtime and room suitability for the selected version. The listed 120 Volts is a point to confirm for UK use before purchase. A compatible demineralisation cartridge is stated to be not included.

## In the box

- Aroma pad (Included)
- Cleaning brush (Included)
- Humidifier (Included)
- Humidifier body (Included)
- User manual (Included)

## A good fit for

- Bedroom users looking for an ultrasonic cool-mist humidifier with a 4-litre tank and top filling.
- Buyers who want app or voice control and an aroma tray.

## Less suited to

- Buyers who need an unambiguous runtime or independently confirmed room coverage before choosing a model.
- Buyers who cannot confirm that the listed 120 Volts suits their UK power supply.

## Customer feedback

Customer feedback reports effective mist output, quiet operation, ease of use and cleaning, alongside positive comments about value. Leakage experiences are mixed, so buyers should keep placement and routine checks in mind. These are reported impressions, not a guarantee of performance or leak-free operation. The feedback makes the quiet-use and maintenance experience relevant to bedroom buyers, while the listing's runtime and coverage claims remain separate manufacturer specifications.
- Positive themes: Customers report effective mist output and quiet operation.
- Positive themes: Feedback describes the unit as easy to use and clean, with positive value comments.
- Mixed feedback: Customer feedback includes mixed experiences with water leakage.

## Frequently asked questions

### How long is the listed runtime?
The technical details list 32 hours, but feature copy claims 36 hours. Treat runtime as unclear and check the selected listing.
### Can it be controlled remotely?
The listing specifies app and voice control. It also claims compatibility with Alexa and Google Assistant.
### Is a demineralisation cartridge included?
No. The listing says the compatible DREO demineralisation cartridge is not included.
### Is the listed voltage suitable for UK mains?
The technical details state 120 Volts. Confirm compatibility for your supply before buying.

## Alternative options

- [Homvana Cool Mist Humidifier for Bedroom, Baby, Room, Home \(3.6L, Grey\) \| 23dB Quiet, 360° Rotatable, 36H Runtime, BPA Free, Top Fill, Easy Clean, 7 Color Night Light, Oil Diffuser for Aromatherapy](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [DREO Humidifier for Bedroom with Sensor, 26dB Quiet Cool Mist Ultrasonic Humidifiers for Home, 360° Nozzle, 30H Runtime, Ambient Light Indicator, Essential Oil Diffuser, Room, Plants, Nursery, White](https://bargainpostbox.co.uk/visit/dreo-dr-hhm006-white-3l-ultrasonic-humidifier)
- [Carepod One Plus Air Humidifier for Bedroom & Nursery - Quiet Ultrasonic Cool Mist Humidifier with Mood Light & Dark Mode, Easy to Clean, Only 3 Washable Parts, Sterilisable Stainless Steel Tank, 4L](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [Levoit Smart Humidifier for Bedroom, 4.2L Top Fill, 21dB Ultra Quiet \| Detachable Tray for Easy Cleaning, 42H Runtime, Auto Mode, App & Voice Control, Up to 40m² Coverage](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [DREO 4L Cool Mist Humidifier, Smart Humidity Sensor & LED Real-Time Humidity Display, 21dB Silent Bedroom Diffuser, Top Refill Oil Diffuser, 40 Hours Runtime, Soft Night Light, Easy Clean, Black](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [Levoit Smart Warm & Cool Mist Humidifier, 6L Top Fill, Timer \| Up to 50H Runtime, Intelligent Humidity Monitor, Essential Oil Diffuser, Ideal for Large Rooms](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [DREO 6L Smart Humidifier for Bedroom, Warm & Cool Mist, 28dB Quiet for Baby \| 60H Runtime, Top Fill, Auto Humidity Control, 360° Rotating Nozzle, Essential Oil Tray, App, Alexa & Google, for Large Rooms](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [DREO 4L Cool Mist Humidifier, Smart Humidity Sensor & LED Real-Time Humidity Display, 21dB Silent Bedroom Diffuser, Top Refill Oil Diffuser, 40 Hours Runtime, Soft Night Light, Easy Clean, White](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [Carepod One Plus Air Humidifier for Bedroom & Nursery - Quiet Ultrasonic Cool Mist Humidifier with Stand, Mood Light & Dark Mode, Easy to Clean, 3 Washable Parts, Sterilisable Stainless Steel Tank, 4L](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [Carepod Cube Plus Air Humidifier for Bedroom & Living Room, Warm & Cool Mist Humidifier, Easy to Clean, Built-In Heat Sanitisation, Auto-Humidity & Night Mode, Filter-Free, Up to 32 Hours, 4.2L](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [Puromatic - The "Pure Water Machine" makes the Purest Distilled Water and turns off Automatically. Stainless Steel with Glass Collection Carafe for Home and Office.](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)
- [Pro Breeze 4-in-1 Smart Portable Air Conditioner 5000 BTU with Wifi, Remote Control, 24 Hour Timer & Dual Window Venting Kit Included - Powerful Air Conditioning Unit for Home](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)

## Add-ons

- [DREO Smart Humidifier for Bedroom Baby, 4L Cool Mist Humidifiers for Home \| Top Fill, Quiet Sleep 28 dB, 36H Runtime for larg](https://bargainpostbox.co.uk/visit/dreo-4l-smart-cool-mist-humidifier)

## Images

![DREO 4L Smart Cool-Mist Humidifier — 1](https://bargainpostbox.co.uk/i/ZeNuf8FK_io_SVN39Lclu9HsfAa7O4Tcior9caCQgs1Mc6od1vyMHOCTGSjzphGHcFhH4MHPOI0aYJQ--S7FFAd2pkJwZY-fH_LWu8yZFCofOqIr6lrdYnHe.jpg)

![DREO 4L Smart Cool-Mist Humidifier — 2](https://bargainpostbox.co.uk/i/iRp_BYtqDc8QXewstyngt-CgJ4ZM-Pw5yat_CuK02eGOK4bIe-tp1uzycNRMiFYtobYxUKmxOz6iPi9eRw6Abk3bvfRU3iDAHeDsbp87AflXi1qpTRh-A4Ad.jpg)

![DREO 4L Smart Cool-Mist Humidifier — 3](https://bargainpostbox.co.uk/i/qEWxaJ6hH_yQMY7eluOno5uiRsnWeoCigohejzEzdLNNaC4t2qwNuNKS1ni4QGy91IuwhpNPkx29LYFG-MgX5nmQUhxLeyrLCKWPiSAiYBSVvBfIKlH-wM13.jpg)

![DREO 4L Smart Cool-Mist Humidifier — 4](https://bargainpostbox.co.uk/i/-QbzX7yju47FluxPdxph03ZDhCahS6u6oavXwC8MTxaCDENJTCu6IaXO3hizpfJ272omTjaTlIwaDj6zYxTbEWJ8pDbgdgeUEtC7Foc9__-Z3jWBsuQDXX2v.jpg)

![DREO 4L Smart Cool-Mist Humidifier — 5](https://bargainpostbox.co.uk/i/LwRSIU-_6R31MvdAyfGZAeq7Ugw8lEG_GGUzY-p1Vi77Fm0JRrE9LPaQ-HHy6Q2PIbFNb3b1NhF0SxeY_x27H2WzQKJl6q_45U7WbLU6f_waxyshsGezbOqu.jpg)

![DREO 4L Smart Cool-Mist Humidifier — 6](https://bargainpostbox.co.uk/i/zlqu2Sp9c7d7nPKNFnfDBvecJj5qFjVHw1GaVd87sA_glGjZ7Lk-GWoELzZheFw8vt9TUn2rXN9SIPXxwkK3juyqWaVvClw-5lx3dMfQiaSxqy_7kZlwlFJd.jpg)

![DREO 4L Smart Cool-Mist Humidifier — 7](https://bargainpostbox.co.uk/i/F7LUa9BI8d3UxHzi_-1KptgOvOxQX2Bu8WeWc_JSnCHkpDX91TX-CRJ_dl5s2BTJ4F0zgrVU8b-ol4JFDAHg-VR5Ng_yo76S2AxhHGK70Lh12nMdX_jLQPWD.jpg)