DREO 755S Review: A 16L Smart Humidifier for 1000 sq ft
DREO's 755S is a 16L smart humidifier for up to 1000 sq ft, with up to 130 hours of runtime, a 5 percent accuracy sensor and app, voice and remote control.
By Daniel Brooks
Updated October 31, 2026
The DREO 755S 16L Smart Humidifier is a 16L smart cool mist humidifier for rooms up to 1000 sq ft, with up to 130 hours of runtime and a sensor rated for 5 percent accuracy. For more models, see our Humidifiers page.
Our Verdict
The 755S is the large room humidifier for people who never want to think about refilling. A full tank runs close to a week, and the sensor and app keep humidity right without attention.
It is cool mist only and heavy when full, so fill it in place with a pitcher.
DREO 755S 16L Smart Humidifier
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Key Specifications
| Feature | Specification |
|---|---|
| Brand | DREO |
| Model | 755S |
| Tank | 16L |
| Coverage | Up to 1000 sq ft |
| Output | 400 ml per hour |
| Runtime | Up to 130 hours |
| Noise | 30 dB |
| Controls | Touch, remote, app and voice |
| Size | 9.45 x 9.45 x 25.04 inches |
Design
The tank fills from the top, and DREO’s Clean Tank design is meant to simplify maintenance. At about 25 inches tall, it stands on the floor.
A 6 foot mist column and a 400 ml per hour output spread moisture through large rooms.
Controls
A 3 color light shows the humidity status at a glance, and auto mode holds your target level.
Control it from the touch panel, the remote, the app or by voice, with timers and schedules. DREO rates the noise at 30 dB, and the display dims for sleep.
Placement Tips
Set the humidifier on a flat, water-safe surface at least a couple of feet off the floor if you can, and aim the mist into open air rather than at walls, wood furniture, curtains or electronics. Keep it a few feet from the bed or crib so moisture spreads through the room before it reaches you.
Check the room with a hygrometer for the first few days. Most homes feel best between 40 and 60 percent relative humidity, and if windows start to fog or the room smells musty, turn the output down or let the auto mode hold a lower target.
Running Costs and Care
Running costs are low: a humidifier uses far less electricity than a space heater or air conditioner, and the main extras are water, any filters or wicks, and cleaning supplies. Warm mist models use more power than cool mist or evaporative units because they heat the water.
Empty and dry the tank when you can, and clean it at least once a week so bacteria and mold do not build up. Distilled or filtered water reduces white dust from ultrasonic units and slows scale in every type. Before storing it for summer, clean and dry every part.
How It Compares
Against the Lacidoll 16L, the DREO adds app and voice control and longer runtime, while the Lacidoll has larger listed coverage.
Against the DREO 747S, the 755S has a bigger tank and coverage, while the 747S is quieter.
Pros and Cons
| Pros | Cons |
|---|---|
| 16L tank, up to 130 hours | Heavy when full |
| Up to 1000 sq ft | Cool mist only |
| Sensor with auto mode | Needs floor space |
| Touch, remote, app and voice | Louder than bedroom units |
| Dimmable display | White dust possible with hard water |
Who Should Buy It
| Who Should Buy It? | Who Should Look Elsewhere? |
|---|---|
| Living rooms | Small rooms |
| Open floors | Warm mist fans |
| Large bedrooms | Tight spaces |
| People who refill rarely | Hard water without filtration |
For more options, see our picks for the best humidifiers for large rooms and the best DREO humidifiers.
To see how it ranks against similar models, read our best humidifiers for large rooms, best large capacity humidifiers and best dreo humidifiers.
Final Verdict
The DREO 755S 16L Smart Humidifier is a huge-tank smart humidifier that keeps a large room comfortable for days at a time. You can check the current price and details for the DREO 755S 16L Smart Humidifier.
Frequently Asked Questions
How much space does the DREO 755S cover?
Up to 1000 sq ft.
How long does it run?
Up to 130 hours on its 16L tank.
How loud is it?
DREO lists 30 dB.
Does it have warm mist?
No, it is cool mist only.
Can I control it by voice?
Yes, along with the app, remote and touch panel.
About the author
Daniel Brooks is a home cooling editor at WikiCooling, covering window, portable, through-the-wall and mini-split air conditioners, fans, and dehumidifiers. He researches cooling capacity, energy efficiency, noise levels, installation requirements, and buyer feedback to help homeowners choose the right unit for their room size, climate, and budget.