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Keeping a large bedroom or living area comfortable can be difficult when a small humidifier needs constant refilling or cannot maintain your target humidity. The DREO Smart Humidifier HM713S 6L addresses that problem with a 6-liter tank, warm and cool mist, smart humidity control, and app, touch, and voice operation. Its strongest advantages are the high warm-mist output and convenient automation, while its main tradeoffs are the extra power used in warm mode and the fact that advertised room coverage can vary greatly with room conditions. This review explains those differences so you can decide whether the HM713S fits your space and daily routine.
Quick Verdict
Rating: 8.5/10, Recommended with caveats
Best For: Bedrooms, offices, and medium-to-large rooms where you want smart humidity control plus both warm and cool mist.
Bottom Line: The HM713S combines a 6L tank, up to 500 mL/h mist output, ±5% humidity control, and useful smart controls in one unit. It is less compelling if you only need basic cool mist or want the lowest possible power use.
Key Takeaways
- 6L water tank: Designed for longer operation between refills, with an advertised maximum runtime of up to 60 hours under suitable settings and conditions.
- Warm and cool mist: Cool mist reaches up to 300 mL/h, while warm mist can reach up to 500 mL/h.
- Smart humidity control: Auto Mode lets you choose a target between 30% and 90% relative humidity with ±5% control accuracy.
- Multiple controls: You can operate the humidifier from its touch controls, the DREO app, or compatible voice assistants.
- 28 dB rated noise: Sleep Mode and dimmed lighting make it better suited to nighttime use than many high-output appliances.
- Coverage needs context: Amazon advertises coverage up to 550 square feet, but actual effectiveness depends on room size, ventilation, temperature, and starting humidity.
Key Specifications
| Specification | Detail |
|---|---|
| Brand | DREO |
| Model | HM713S / DR-HHM003S |
| Product type | Smart ultrasonic warm and cool mist humidifier |
| Tank capacity | 6 liters |
| Advertised runtime | Up to 60 hours |
| Maximum cool-mist output | 300 mL/h |
| Maximum warm-mist output | 500 mL/h |
| Humidity control | Target range 30% to 90%, ±5% precision |
| Noise rating | 28 dB |
| Rated power | 26W cool mist, 280W warm mist |
| Controls | App, touch, and voice |
| Operating modes | Manual, Auto, and Sleep |
| Dimensions | 11.41″D × 6.14″W × 13.93″H |
| Weight | 5.95 lb |
| Aromatherapy | Dual-aroma pad tray |
| Included accessories | User manual, quick-start guide, cleaning guide, cleaning brush, and 3 aroma pads with 2 pre-installed |
What Is the DREO HM713S 6L Humidifier?
The DREO HM713S is a smart ultrasonic humidifier designed to give you more control than a basic single-setting cool-mist model. Its 6L tank feeds both cool and heated mist modes, while an onboard humidity sensor supports automatic adjustment.
You can use Manual Mode when you want direct control over one of three mist levels, Auto Mode when you want the unit to respond to your humidity target, or Sleep Mode when you want quieter operation with reduced lighting. The DREO app also lets you monitor humidity trends and manage settings without standing beside the unit.
The main reason to choose this model over a simpler humidifier is flexibility. You are paying for a combination of higher warm-mist output, automatic humidity management, smart-home controls, and a relatively large tank rather than for a basic on-and-off humidifier.
Who Should Buy It?
Best For
- You want both warm and cool mist from one humidifier.
- You prefer automatic humidity control instead of manually changing mist levels throughout the day.
- You want app or voice control for a bedroom, office, or shared living area.
Skip If
- You only need a basic cool-mist humidifier and do not care about app or voice controls.
- You need guaranteed whole-room performance in a very large or highly ventilated space.
- You want the lowest possible power draw, since warm-mist mode uses considerably more power than cool mist.
Before You Buy: Do not treat the 550-square-foot figure as a guarantee. Room layout, open doors, ventilation, ceiling height, temperature, and starting humidity all affect how quickly one humidifier can change the humidity across a space.
6L Tank and Mist Performance
The 6-liter tank is one of the HM713S’s most useful features because it reduces how often you need to stop and refill the unit. DREO and the Amazon listing advertise up to 60 hours of runtime, although actual runtime falls when you use higher output settings or warm mist.
Cool mist reaches up to 300 mL per hour, while warm mist can reach 500 mL per hour. That higher warm-mist output can help the machine raise humidity faster when the room starts very dry, but it also increases water consumption.
Amazon advertises coverage up to 550 square feet. For practical use, treat that as an upper marketing figure rather than a promise that every 550-square-foot room will humidify evenly. A smaller enclosed room is generally easier for one machine to manage than an equally sized open room connected to hallways or other spaces.
Warm and Cool Mist Control
The HM713S gives you the option to use cool mist for ordinary humidification or activate its heating system for warm mist. DREO lists a maximum rated power of 26W in cool mode and 280W in warm mode, so there is a meaningful energy-use difference between the two.
DREO’s support guidance states that the warm-mist temperature can be adjusted from about 113°F to 130°F and may need roughly 5 to 10 minutes to reach the selected temperature. This makes warm mist a feature you can choose when wanted rather than something you need to run continuously.
Pro Tip: Use cool mist when you mainly want steady humidity with lower power consumption, then switch to warm mist when you specifically want the higher output or warmer mist experience.
Smart Humidity Control and App Features
The built-in humidity sensor is a stronger reason to buy the HM713S than simply having phone control. Auto Mode lets you set a target humidity from 30% to 90%, and DREO specifies control accuracy within approximately ±5%.
That means you can choose a target instead of leaving the unit at a fixed mist setting all day. As room conditions change, Auto Mode can reduce or increase operation rather than continuing to release the same amount of mist.
The DREO app adds remote control, humidity tracking for up to 30 days, and maintenance reminders. The unit also supports touch controls and compatible voice assistants, so you are not dependent on the app for basic use.
Noise Level and Nighttime Use
DREO rates the HM713S at 28 dB. Sleep Mode is designed to reduce disruption further by combining quieter operation with dimmed lighting, which is useful when the display would otherwise be distracting in a dark bedroom.
The 6L tank also matters at night because a larger reservoir reduces the chance that you will need to refill it during a normal sleep period. Runtime still depends on mist level, warm versus cool operation, and the humidity of the room.
If you hear unusual noise, DREO recommends lowering the mist level, trying Sleep Mode, and making sure the air inlet is not blocked. Avoid placing the machine directly on carpet where the inlet can become restricted.
Dual-Aroma Pad Tray
The HM713S includes a dual-aroma pad tray and three aroma pads, with two installed from the factory. The two-pad design gives you a dedicated place for fragrance instead of requiring you to mix oil into the main water tank.
If you use essential oils, follow the HM713S instructions for its designated aroma system and replace or clean aroma pads as directed. Avoid adding oils directly to the water tank unless the current product manual specifically tells you to do so.
Cleaning and Maintenance
Humidifiers work with standing water, so regular cleaning matters. DREO includes a cleaning guide and cleaning brush with the HM713S and recommends cleaning the tank and base regularly rather than allowing residue to accumulate.
DREO also recommends purified or distilled water to reduce white mineral dust. Water with higher mineral content can leave deposits inside the unit or create visible dust around an ultrasonic humidifier.
If the warm mist becomes less effective, mineral scale on the heating element can also be a factor. Follow the manufacturer’s descaling instructions instead of scraping the heating element with abrasive tools.
Placement and Safety Tips
- Place the humidifier on a stable, level, water-resistant surface.
- Keep the air inlet clear rather than pressing the unit against a wall, curtain, bedding, or carpet.
- Avoid directing the mist outlet straight toward the humidity sensor because this can affect the displayed reading.
- Reduce mist output if you notice condensation forming on nearby windows, walls, or furniture.
- Keep the warm-mist outlet and heated components away from children and pets, and follow the product manual for safe placement.
- Do not shake or move the unit while it is full and operating.
The goal is to raise room humidity without creating wet surfaces. More mist is not always better, especially after the room approaches your target level.
How It Performs in Real Use
For a Bedroom
The combination of a 28 dB noise rating, Sleep Mode, dimmable lighting, and a 6L reservoir makes the HM713S well suited to overnight bedroom use. Auto Mode is particularly useful because it can respond to humidity changes rather than running at maximum output until morning.
For a Larger Living Area
The 500 mL/h maximum warm-mist output gives the HM713S more humidification capacity than many compact personal units. However, large open spaces are harder to humidify evenly, so you may need a higher setting, more time, or a more central placement than you would in an enclosed bedroom.
For an Office or Workroom
App control is useful when the humidifier is across the room or positioned away from your desk. You can monitor conditions and change settings without repeatedly walking to the machine, while cool mode keeps rated power use far below the warm-mist setting.
For Daily Long-Term Use
The large tank reduces refill frequency, but it does not remove the need for routine cleaning. If you plan to run the HM713S every day, easy access to the tank, base, aroma tray, and included cleaning brush becomes just as important as tank capacity.
Pros and Cons
Pros
- 6L tank with up to 60 hours of advertised runtime.
- Both warm and cool mist in one machine.
- Warm-mist output reaches up to 500 mL/h.
- Auto humidity control with a 30% to 90% target range and ±5% precision.
- App, touch, and voice controls plus a quiet 28 dB rating.
Cons
- Warm mode uses substantially more rated power than cool mode.
- The 550-square-foot coverage claim should not be treated as guaranteed performance in every room.
- Like other ultrasonic humidifiers, it still requires regular cleaning and benefits from low-mineral water.
Is It Worth the Price?
The HM713S sits above DREO’s simpler cool-mist models because you are getting warm mist, higher maximum output, smart controls, automatic humidity management, and a large 6L tank in the same appliance. It offers the strongest value when you expect to use those extra features rather than leaving the machine on one basic cool-mist setting.
If you mainly need inexpensive humidity for a small bedroom, a simpler model can make more financial sense. If you want warm and cool modes, remote controls, humidity tracking, and enough capacity to avoid constant refilling, the HM713S is easier to justify.
How It Compares to Alternatives
Within DREO’s own range, the Smart Humidifier 524S 6L is worth comparing if you want a 6L smart unit but do not need the same warm-mist focus. The larger Smart Humidifier 717S 8L is more suitable to compare if tank capacity is your priority.
The HM713S occupies the middle ground for buyers who specifically want a 6L size plus warm and cool mist, smart controls, and strong output without moving to one of DREO’s larger-capacity models.
Frequently Asked Questions
What is the exact model of this DREO 6L humidifier?
The product linked in this review is the DREO Smart Humidifier HM713S. Amazon also identifies the Silver version with the model designation DR-HHM003S.
Can the DREO HM713S really cover 550 square feet?
Amazon advertises coverage up to 550 square feet, but real performance depends on ventilation, room layout, temperature, and starting humidity. DREO’s own troubleshooting guidance indicates that performance can decline in rooms larger than roughly 215 to 430 square feet, so consider 550 square feet an upper advertised figure.
Does the HM713S produce both warm and cool mist?
Yes. Its cool-mist output reaches up to 300 mL/h, while warm mist reaches up to 500 mL/h. Warm mode also uses more rated power, so cool mist is the lower-power option for routine operation.
What water should you use in the DREO HM713S?
DREO recommends purified or distilled water to reduce mineral buildup and white dust. If your tap water has high mineral content, switching water type can also reduce how quickly deposits form inside the unit.
Can you use essential oils with this humidifier?
The HM713S has a dual-aroma pad tray and includes three aroma pads. Use the designated aroma system according to the current manual rather than pouring oils into the main water tank.
How often should you clean the HM713S?
Clean the tank and base regularly and do not allow dirty water or mineral scale to accumulate. DREO supplies a cleaning guide and brush with the unit, so follow those current instructions for routine cleaning and descaling.
Does the DREO app replace the physical controls?
No. The HM713S supports app, touch, and voice controls, so you can still operate basic functions directly from the humidifier. The app mainly adds remote adjustment, humidity history, schedules, and maintenance reminders.
Who should skip the DREO HM713S?
Skip it if you only need an inexpensive basic cool-mist unit and have no use for warm mist, smart controls, or humidity tracking. It is also not the best choice when you need guaranteed coverage across a very large or highly open space.
The Bottom Line
The DREO HM713S is a strong choice when you want a 6L smart humidifier with both warm and cool mist, automatic humidity control, and up to 500 mL/h output. Its main limitations are the much higher power draw in warm mode and room coverage that varies with real conditions, so buyers needing only simple cool mist can spend less on a basic model.
For bedrooms, offices, and medium-to-large rooms where you will actually use the smart controls and dual-mist capability, the HM713S earns our 8.5/10, Recommended with caveats verdict.
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