How noisy is the humidifier when it is working? I am a light sleeper and need to be in a very quiet environment to fall asleep.

No worries at all. I am also a light sleeper, and this humidifier has never disturbed my sleep. It is much quieter than I expected, especially in sleep mode. In fact, I sleep much better with it on at night since it does a good job in relieving my itchy skin which caused by dryness.

Can you change the direction of mist output?

Hi, Yes you can. There is a straight wide piece that goes across 75% of its total length on the top of the humidifier that can be moved around in order to change the directional output. Hope this helps. Shalom… :O)

What warranty does it come with?

Dear Customer, This appliance is covered by Dreo warranty for 12 months from the date of its original purchase. You can also extend your warranty by registering your new appliance on our website: https://dreo.com/warranty. For any other issues, please don't hesitate to contact us. You can always find our contact information on the last page of the user manual. If you have any other questions, please feel free to contact us. We are always at your service! Dreo Customer Support Team

I've cleaned my humidifier 4 times since I opened the box 2 weeks ago. It continues to smell like mildew. Anyone else have this issue?

Did you add baking soda to the water when you clean it Soak for 1/2 hour. Then clean and rinse well. Hope this works for you.

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Dreo Humidifiers for Bedroom, 4L Top Fill for Large Room, 36H Runtime, 28 dB Quiet Supersized Cool Mist Air Humidifier for Baby Nursery, Plants, Indoor, Night Light, Easy to Clean & Fill, White

Dreo Humidifiers for Bedroom, 4L Top Fill for Large Room, 36H Runtime, 28 dB Quiet Supersized Cool Mist Air Humidifier for Baby Nursery, Plants, Indoor, Night Light, Easy to Clean & Fill, White

Product ID: 552692596

Details

Brand
DREO
Capacity
4 Liters
Color
White
Floor Area
300 Square
Special Feature
28dB Operation

⏳36-hour continuous runtime

💧4L large tank capacity

🔇28dB ultra-quiet operation

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Details

Brand
DREO
Capacity
4 Liters
Color
White

Description

💨 Elevate your air game—breathe better, sleep deeper, live fresher.

ALL NIGHT HYDRATION - 4L tank delivers up to 36 hours of uninterrupted moisture—sleep soundly without refills.
MOOD ENHANCING 3 IN 1 - Beyond humidifying—enjoy ambient night light and aroma diffusion for a healthier, cozier environment.
SUPERSIZED MIST POWER - Advanced dual-intake and 4-inch outlet create a 40-inch tall mist plume for rapid, even humidification.
WHISPER QUIET COMFORT - Operates at a barely-there 28dB, perfect for nurseries, bedrooms, and focused workspaces.
EFFORTLESS TOP FILL DESIGN - No spills, no hassle—easy to refill and clean with a modular tank that fits your busy lifestyle.

The Dreo 4L Cool Mist Humidifier combines a large-capacity tank with whisper-quiet ultrasonic technology to provide up to 36 hours of continuous, evenly distributed moisture. Its innovative dual-intake and tall mist outlet ensure rapid humidification for rooms up to 300 sq ft, while the easy top-fill design and modular components simplify maintenance. Ideal for nurseries, bedrooms, and offices, it also features adjustable ambient lighting and aroma diffusion to enhance your space’s atmosphere.

Specifications

ASIN	B0CCY6VG8Z
Best Sellers Rank	#1,882 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #6 in Humidifiers
Brand	DREO
Brand Name	DREO
Capacity	4 Liters
Color	White
Control Method	Touch
Customer Reviews	4.4 out of 5 stars 16,757 Reviews
Filter Type	Pre Filter
Floor Area	300 Square Feet
Included Components	Aroma Pad, Cleaning Brush, Cleaning Guide1, Humidifier1, User Manual
Item Dimensions D x W x H	5.51"D x 11.02"W x 10.16"H
Item Shape	Oval
Item Type Name	Humidifier
Item Weight	3.1 Pounds
Manufacturer	DREO
Material	Plastic
Model Name	HM311
Model Number	DR-HHM001
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	850049246026
Unit Count	1.0 Count
Voltage	120 Volts
Wattage	26 Watt-hours

Reviews

L**K

27.01.2025

E**N

24.04.2026

A**R

24.04.2026

A**A

19.02.2026

M**I

17.03.2026

M**R

31.03.2026

K**T

18.03.2026

S**N

20.04.2026

M**W

6.03.2026

A**O

21.04.2026

G**Y

5.08.2025

J**L

18.10.2025

E**N

26.03.2026

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