---
product_id: 597596845
title: "DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black"
brand: "dreo"
price: "€ 137.58"
currency: EUR
in_stock: true
reviews_count: 13
category: "Dreo"
url: https://www.desertcart.sk/products/597596845-dreo-4l-humidifiers-for-bedroom-36h-runtime-28-db-quiet
store_origin: SK
region: Slovakia
---

# 36-hour continuous runtime 4L large tank capacity Ultra-quiet 28dB operation DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black

**Brand:** dreo
**Price:** € 137.58
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your air game—breathe better, live better, sleep smarter.

## Quick Answers

- **What is this?** DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black by dreo
- **How much does it cost?** € 137.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/597596845-dreo-4l-humidifiers-for-bedroom-36h-runtime-28-db-quiet)

## Best For

- dreo enthusiasts

## Why This Product

- Trusted dreo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Supersized Mist Power:** Dual-intake and 4-inch outlet create a 40-inch tall mist plume that rapidly refreshes air in rooms up to 300 sq ft.
- • **Whisper-Quiet Wellness:** Operates at a barely-there 28dB, perfect for bedrooms, nurseries, and focused workspaces.
- • **3-in-1 Lifestyle Enhancer:** Humidify, diffuse your favorite aromas, and set the mood with ambient lighting—all in one sleek, BPA-free device.
- • **Effortless Top-Fill Design:** No spills, no flips—just quick, clean refills and easy maintenance to keep your space fresh.
- • **Endless Comfort, Zero Interruptions:** 4L tank delivers up to 36 hours of soothing moisture without refills, so your sleep stays undisturbed.

## Overview

The DREO HM311 is a sleek, black ultrasonic humidifier featuring a large 4-liter tank that provides up to 36 hours of continuous, ultra-quiet (28dB) operation. Designed for rooms up to 300 sq ft, it uses dual-intake and a 4-inch mist outlet to deliver a powerful 40-inch mist plume with ultrafine 5μm particles for even humidity distribution without wet surfaces. Its easy top-fill design and BPA-free materials make refilling and cleaning hassle-free. Additional features include adjustable humidity control, an aroma diffuser, and ambient nightlight, making it ideal for bedrooms, nurseries, and offices.

## Description

desertcart.com: DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black | Easy to Refill & Clean, BPA-Free, Nightlight, Supersized Air Humidifiers for Large Room, Baby Nurseries, Plants, Indoor : Home & Kitchen

Review: It’s worth every penny - Bought this for my sick 2 year old and I absolutely love it, it’s easy to use and super easy to clean (huge plus). It has multiple settings and even a night light that my kids love because it looks like a water lava lamp and the sound is peaceful and not obnoxiously loud.
Review: Cozy, Quiet & Adds the Perfect Moisture on Cold, Dry Days 🍎🍂 - I really love this humidifier! It puts out a steady, noticeable mist and helps the room feel much more comfortable, especially when the air is dry. The large water tank is one of my favorite features because I don’t have to constantly refill it, and it can run for a long time on a single fill. It’s also surprisingly quiet, so I can use it in the bedroom without it being distracting at night. The display is easy to read, the design looks sleek and modern, and the mist output is simple to adjust. Another feature I absolutely love is the reservoir for essential oils. I added an apple cinnamon essential oil blend, and it made the whole room smell warm, cozy, and just like fall. 🍎🍂 The fragrance gently fills the space while the humidifier runs, so I get the added moisture along with a beautiful seasonal scent. It’s easy to use, looks great in the room, and makes the space feel so much more comfortable and inviting. I would definitely recommend it for bedrooms, living spaces, or anywhere you want extra moisture with the bonus of a cozy fragrance.

## Features

- 𝟰𝗟 𝗟𝗮𝗿𝗴𝗲 𝗧𝗮𝗻𝗸 𝗳𝗼𝗿 𝗖𝗼𝗻𝘁𝗶𝗻𝘂𝗼𝘂𝘀 𝗖𝗼𝗺𝗳𝗼𝗿𝘁: Enjoy quiet sleep without congestion, coughing, or dry mouth, DREO's ultrasonic atomization brings noise down to 28dB, while its 4L tank provides up to 36 hours of moisture without the need to refill.
- 𝗡𝗲𝘅𝘁-𝗚𝗲𝗻 𝗛𝘂𝗺𝗶𝗱𝗶𝗳?𝗰𝗮𝘁𝗶𝗼𝗻 𝗣𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲: Powered by DREO's Dual-intake and 4-inch mist outlet design, this humidifier creates a supersized mist of up to 40 inches tall for humidifying bedrooms, while bringing faster dry air relief to help you breathe easy and healthy.
- 𝗕𝗿𝗶𝗻𝗴 𝗙𝗿𝗲𝘀𝗵𝗻𝗲𝘀𝘀 𝗔𝗹𝗹-𝗮𝗿𝗼𝘂𝗻𝗱: Thanks to its high-frequency atomization process, this humidifier for large room releases 5μm Ultrafine mist and lighter mist particles, allowing humidity to spread evenly across the room without wetting surfaces.
- 𝗘𝗮𝘀𝘆 𝗧𝗼𝗽 𝗙𝗶𝗹𝗹 𝗗𝗲𝘀𝗶𝗴𝗻: This baby humidifier allows you to fill up without having to flip the tank or spill water on the floor. Its modular design is easy to remove and install, giving you a hassle-free cleaning experience.
- 𝟯-𝗶𝗻-𝟭 𝗛𝘂𝗺𝗶𝗱𝗶𝗳𝗶𝗲𝗿: DREO cool mist humidifiers are perfect companions for a healthier life, from helping you breathe easier, to making your own aromatherapy sessions, to changing the mood of your room with its ambient light (essential oils not included).

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CNRC4G2C |
| Best Sellers Rank | #840 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #3 in Humidifiers |
| Brand | DREO |
| Brand Name | DREO |
| Capacity | 4 liters |
| Color | Black |
| Control Method | Touch |
| Customer Reviews | 4.4 out of 5 stars 17,807 Reviews |
| Filter Type | Pre Filter |
| Floor Area | 300 square_feet |
| Included Components | Aroma Pad, Cleaning Brush, Cleaning Guide*1, Humidifier*1, User Manual |
| Item Dimensions D x W x H | 5.51"D x 11.02"W x 10.16"H |
| Item Highlight | Easy to Refill & Clean, BPA-Free, Nightlight, Supersized Air Humidifiers for Large Room, Baby Nurseries, Plants, Indoor |
| Item Shape | Oval |
| Item Type Name | Humidifier |
| Item Weight | 3.1 pounds |
| Manufacturer | DREO |
| Material | BPA-Free, suitable for baby, Plastic |
| Model Name | HM311 |
| Model Number | DR-HHM001 |
| Number of Packs | 1 |
| Operation Mode | Ultrasonic |
| Other Special Features of the Product | 28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light |
| Part Number | DR-HHM001 |
| Power Source | Corded Electric |
| Room Type | Bedroom, Kids Room, Living Room, Nursery, Office |
| Runtime | 36 hours |
| Special Feature | 28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light |
| UPC | 810142854382 |
| Unit Count | 1 Count |
| Voltage | 120 volts |
| Wattage | 26 watt-hours |

## Product Details

- **Brand:** DREO
- **Capacity:** 4 liters
- **Color:** Black
- **Floor Area:** 300 square_feet
- **Special Feature:** 28dB Ultra-Quiet Operation, Adjustable Humidity Control, Aroma Diffuser, Easy Top-Fill, Night Light

## Images

![DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black - Image 1](https://m.media-amazon.com/images/I/71gC1uUpOeL.jpg)
![DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black - Image 2](https://m.media-amazon.com/images/I/71DY3UW3tFL.jpg)
![DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black - Image 3](https://m.media-amazon.com/images/I/71rGOm2lHsL.jpg)
![DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black - Image 4](https://m.media-amazon.com/images/I/81oINfPSHiL.jpg)
![DREO 4L Humidifiers for Bedroom, 36H Runtime, 28 dB Quiet, HM311, Black - Image 5](https://m.media-amazon.com/images/I/81YIkDQcSML.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ It’s worth every penny
*by A***. on October 3, 2026*

Bought this for my sick 2 year old and I absolutely love it, it’s easy to use and super easy to clean (huge plus). It has multiple settings and even a night light that my kids love because it looks like a water lava lamp and the sound is peaceful and not obnoxiously loud.

### ⭐⭐⭐⭐⭐ Cozy, Quiet & Adds the Perfect Moisture on Cold, Dry Days 🍎🍂
*by T***L on September 24, 2026*

I really love this humidifier! It puts out a steady, noticeable mist and helps the room feel much more comfortable, especially when the air is dry. The large water tank is one of my favorite features because I don’t have to constantly refill it, and it can run for a long time on a single fill. It’s also surprisingly quiet, so I can use it in the bedroom without it being distracting at night. The display is easy to read, the design looks sleek and modern, and the mist output is simple to adjust. Another feature I absolutely love is the reservoir for essential oils. I added an apple cinnamon essential oil blend, and it made the whole room smell warm, cozy, and just like fall. 🍎🍂 The fragrance gently fills the space while the humidifier runs, so I get the added moisture along with a beautiful seasonal scent. It’s easy to use, looks great in the room, and makes the space feel so much more comfortable and inviting. I would definitely recommend it for bedrooms, living spaces, or anywhere you want extra moisture with the bonus of a cozy fragrance.

### ⭐⭐⭐⭐⭐ Outstanding Humidifier - Along with Some Suggestions
*by L***K on January 27, 2025*

Some helpful hints I found have helped to keep this humidifier working. First, make sure the tape and Styrofoam block are removed from the product. Second, when filling the tank, make sure that room temp water is added, especially the for the first time. Hot water may damage the seal. Third, do not fill water above the MAX level. The extra weight may cause leaks in the seal. Fourth, all small humidifiers like this will get bacteria/mold if not cleaned every 2-3 days. It is the nature of having water heating up for days without cleaning. If you don't like cleaning it every three days, understand that there will be mold/bacteria inside the base's small tank. It's just that simple. Cleaning is easy, but it takes some time to thoroughly clean the unit. ... and fifth, make sure NO water gets in the part that looks like a tower on the base's smaller tank. A small amount will flood the air intake and the electronics' board. This will mess up the controls. If it does happen, use a blow dryer on low to try and dry the board at the base of the unit. Otherwise, a couple of days should dry it out. If it isn't severely flooded, it may still work. Also, NEVER put anything but water in the tank when in use. Vicks, scented oils, or anything else will wreck this humidifier. The only thing I use in the tank is white vinegar to clean and descale it, but after that kind of cleaning, I rinse it out thoroughly and then dry it completely. Keep in mind, tap water is not the best water to use (lots of minerals) which is why white dust from this humidifier can go everywhere in the home and stick to the inside areas of the humidifier. Best to use distilled water or at least buy a demineralizing cartridge if using tap water (they last 4-6 months). Hope these helpful hint work for your humidifier. Took a lot of trial and error beforehand, but once I used this information, there hasn't been an issue yet with my Dreo humidifier or any of my previous humidifiers. Best of luck UPDATE: I started to have some issues with dust just like what others have be experiencing. I contacted Dreo by email and customer rep, Carol Hesung, was able to help resolve the problem. While suggesting that distilled water is the best way to combat the dust, I mentioned it wouldn't work out for me due to the high cost of distilled water per month. Carol understood and offered a complete refund for this unit and for the larger unit I purchased. Not only that, the demineralizing cartridge filter (3-pack) I bought was also refunded. Carol said there was no need to return any of these products. Not only was I pleasantly surprised with this outcome, it proved to me that Dreo is all about making it right for the customer if problems arise. With the actions Dreo has made, I will definitely recommend them and make future purchases from this company. Their customer service has been stellar and I wish other businesses would follow their lead. The Dreo team puts customers first and that is one of their best services offered. Thank you Dreo and thank you Carol. I was able to set the Dreo up quickly and finally get some moister back into my room. So far, this is product is working very well. It is super quiet, compact and easy to take apart, clean and put back together. There are many easily operated controls for such a small unit. 4L is quite small for my living room, but for a small bedroom, this will do the trick. I am pleased with the looks, the style, the easy operation, the light system, but most of all the steam output and the way you can direct the steam is an added bonus. If this can last as long as my old humidifier of 9 years, then I will be that loyal customer only to Dreo for sure. It really is a good humidifier even for its smaller footprint. Definitely recommend.

## Frequently Bought Together

- Dreo Humidifiers for Bedroom, Top Fill 4L Supersized Cool Mist Humidifier with Oil Diffuser and Nightlight, 32H Runtime, Quiet Ultrasonic Humidifiers for Home, Large Room, Baby Nursery and Plants
- Dreo Clean Mist Cartridge 3-Pack for Humidifiers, Compatible with Dreo Humidifiers HM311/311S/524/524S/306, Reduce Contaminants Build-up, Healthier Mist, Easier Cleaning

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-10-07*