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Keeping a larger bedroom or living area comfortable can be frustrating when a small humidifier needs frequent refills or cannot hold a steady humidity level. The DREO Smart Humidifier HM713S 6L, sold as model DR-HHM003S in the Silver Amazon listing, combines a 6-liter tank, warm and cool mist, automatic humidity control, and app, touch, and voice operation. Its strongest points are the 500 mL/h maximum warm-mist output and flexible smart controls, while its biggest tradeoffs are the much higher power draw in warm mode and room coverage that depends heavily on layout and ventilation. This review breaks down the verified specs, practical setup, maintenance, and buying limits so you can decide if the HM713S fits your space.
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 gives you a 6L tank, up to 500 mL/h mist output, ±5% humidity control, and several control options in one unit. It is less compelling if you only need basic cool mist, want the lowest power use, or expect one humidifier to evenly cover a very open room.
Key Takeaways
- 6L tank: DREO advertises up to 60 hours of runtime under suitable settings, so refill frequency can be lower than with compact humidifiers.
- Warm and cool mist: Maximum output is rated at 300 mL/h for cool mist and 500 mL/h for warm mist.
- Automatic humidity control: Auto Mode lets you select a target from 30% to 90% relative humidity with a stated control tolerance of about ±5%.
- Smart operation: You can use the onboard touch controls, the DREO app, or compatible voice assistants.
- Nighttime-friendly design: DREO rates the unit at 28 dB and includes a Sleep Mode with dimmed lighting.
- Coverage needs context: Amazon advertises up to 550 square feet, while DREO support notes that effectiveness can drop in rooms larger than about 215 to 430 square feet.
Key Specifications
| Specification | Detail |
|---|---|
| Brand | DREO |
| Model | HM713S / DR-HHM003S |
| Linked variant | Silver |
| 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 | 30% to 90% target range, about ±5% control tolerance |
| Noise rating | 28 dB |
| Power input | 120V, 60Hz |
| 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 |
| Warranty note | DREO support lists 12-month product and labor coverage under its current policy; purchase-channel and registration terms apply |
What Is the DREO HM713S 6L Humidifier?
The DREO HM713S is a smart ultrasonic humidifier built for shoppers who want more control than a basic single-setting cool-mist model. Its 6L tank supports both cool and heated mist, while the built-in humidity sensor lets Auto Mode react to a target rather than running one fixed output all day.
You can choose Manual Mode with three mist levels, Auto Mode with a 30% to 90% target range, or Sleep Mode for quieter operation and dimmed lighting. The DREO app adds remote adjustment, humidity history for up to 30 days, and maintenance reminders, while the physical controls remain available for normal use.
The main reason to choose this model is flexibility. You are paying for a larger tank, higher warm-mist output, automatic humidity management, and smart controls rather than for a simple 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 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 inexpensive cool mist and do not care about smart controls.
- You need guaranteed even coverage across a very large, open, or highly ventilated space.
- You want the lowest possible power draw, because warm mode is rated at 280W versus 26W for cool mist.
Before You Buy: Treat the 550-square-foot Amazon figure as an advertised upper limit, not a guarantee. DREO support says effectiveness can drop when the room is larger than roughly 215 to 430 square feet, and open doors, high ceilings, ventilation, and starting humidity can reduce performance further.
6L Tank and Mist Performance
The 6-liter tank is one of the HM713S’s most practical features because it can reduce how often you refill the unit. DREO advertises up to 60 hours of runtime, but that figure depends on output level, room humidity, and whether you use warm mist.
Cool mist is rated at up to 300 mL/h, while warm mist reaches up to 500 mL/h. The higher warm-mist output can raise humidity faster in a dry room, but it also uses water more quickly and draws much more power.
The Amazon listing also advertises a mist height of about 40 inches. That can help move moisture away from the immediate area around the unit, but placement and room air movement still determine how evenly humidity spreads.
Warm and Cool Mist Control
The HM713S lets you use cool mist for routine humidification or turn on its heating system for warm mist. DREO rates the unit at 26W in cool mode and 280W in warm mode, so the energy difference is substantial if you run warm mist for long periods.
DREO support guidance says the warm-mist temperature setting can be adjusted from about 113°F to 130°F and may take about 5 to 10 minutes to reach the selected setting. Follow the current product manual and control settings when using the heated-mist function.
Pro Tip: Use cool mist for steady daily humidity with lower power use, then switch to warm mist when you specifically want the higher output. Auto Mode can help avoid running either mode harder than the room needs.
Smart Humidity Control and App Features
The built-in humidity sensor is a stronger reason to buy the HM713S than phone control alone. Auto Mode lets you choose a target from 30% to 90%, and DREO states a humidity-control tolerance of about ±5%.
The DREO app can show current humidity, track trends for up to 30 days, and provide cleaning reminders. Amazon also lists compatibility with Alexa and Google voice control. Because the unit still has touch controls, you are not dependent on the app for basic operation.
Noise Level and Nighttime Use
DREO rates the HM713S at 28 dB. Sleep Mode pairs the lower-disruption setting with dimmed lighting, which makes the design better suited to a dark bedroom than a model with a bright always-on display.
The 6L tank also helps at night because it gives you more water capacity before the next refill. Actual overnight runtime still depends on mist level, warm versus cool operation, and how dry the room is.
Dual-Aroma Pad Tray
The HM713S includes a dual-aroma pad tray and three aroma pads, with two pre-installed. The separate tray gives fragrance a designated place instead of requiring you to mix oil into the main water tank.
If you use essential oils, follow the current HM713S manual and use only the designated aroma system. Do not pour oil into the water tank unless the current product instructions specifically direct you to do so.
Cleaning and Maintenance
Regular cleaning matters because the HM713S stores and moves water through the tank and base. DREO includes a cleaning guide and brush, and its support guidance recommends cleaning the tank and base regularly rather than allowing standing dirty water or mineral scale to build up.
DREO recommends purified or distilled water to reduce white mineral dust. If your tap water is hard, low-mineral water can also slow deposits on the ultrasonic and heated parts.
If warm mist becomes weaker, mineral scale on the heating element may be part of the problem. Follow DREO’s descaling directions and avoid 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 of walls, curtains, bedding, and thick carpet.
- Do not aim the mist outlet directly at the humidity sensor, because this can distort the reading.
- Reduce output if you see condensation on windows, walls, or nearby furniture.
- Keep the warm-mist outlet and heated parts away from children and pets.
- Do not shake or move the unit while it is full and operating.
- Follow the current product manual for filling, cleaning, aroma use, and warm-mist safety.
The goal is to raise room humidity without creating wet surfaces. More mist is not always better once the room approaches your target.
How It Performs in Real Use
For a Bedroom
The 28 dB rating, Sleep Mode, dimmed lighting, and 6L reservoir make the HM713S a practical fit for overnight bedroom use. Auto Mode is especially useful because it can respond to the room’s humidity instead of running at maximum output until morning.
For a Larger Living Area
The 500 mL/h maximum warm-mist output gives the HM713S more capacity than many compact personal humidifiers. Large open spaces are still harder to humidify evenly, so you may need a central location, more time, or a higher setting than you would in a closed bedroom.
For an Office or Workroom
App control is useful when the humidifier sits across the room or away from your desk. You can check humidity and change settings from your phone, while cool mode keeps the rated power draw far below the warm-mist setting.
For Daily Long-Term Use
The large tank reduces refill frequency, but it does not reduce the need for cleaning. If you run the HM713S every day, easy access to the tank, base, aroma tray, and cleaning brush becomes as important as tank size.
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 about ±5% tolerance.
- App, touch, and voice controls plus a 28 dB manufacturer noise rating.
Cons
- Warm mode is rated at 280W, far above the 26W cool-mist setting.
- The 550-square-foot coverage claim should not be treated as guaranteed even performance.
- Like other ultrasonic humidifiers, it needs regular cleaning and benefits from low-mineral water.
Is It Worth the Price?
The HM713S sits above a basic cool-mist humidifier because you are paying for warm mist, stronger maximum output, automatic humidity control, app and voice features, and a 6L tank. It makes the most sense if you expect to use several of those features rather than leaving the unit on one basic cool-mist setting.
If your main goal is inexpensive humidity for a small bedroom, a simpler model can offer better value. If you want one machine that can switch between warm and cool mist, hold a humidity target, and reduce refill frequency, the HM713S is easier to justify.
How It Compares to Alternatives
The DREO Smart Humidifier 524S 6L is the clearer alternative if you want a 6L smart model with 28 dB operation and app control but do not need the HM713S’s warm-mist focus. The DREO Smart Humidifier 717S 8L is worth comparing if you want a larger 8L tank, longer advertised runtime, and higher maximum mist output.
The HM713S makes the most sense when you specifically want a 6L size, warm and cool mist, and smart humidity control without moving to a larger 8L unit.
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. The Silver Amazon listing identifies the model as DR-HHM003S Silver, and the ASIN is B0CB4CK3ZS.
Can the DREO HM713S really cover 550 square feet?
Amazon advertises coverage up to 550 square feet, but real performance depends on layout, ventilation, temperature, ceiling height, and starting humidity. DREO support says effectiveness can decline in rooms larger than roughly 215 to 430 square feet, so treat 550 square feet as an upper advertised figure.
Does the HM713S produce both warm and cool mist?
Yes. Cool mist is rated up to 300 mL/h and warm mist up to 500 mL/h. Warm mode also uses much more rated power, so cool mist is the lower-power option for routine use.
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 is hard, low-mineral water can also reduce deposits 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 instead of adding oil to the main water tank.
How often should you clean the HM713S?
Clean the tank and base regularly and do not let dirty water or mineral scale accumulate. DREO supplies a cleaning guide and brush, so follow the 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 normal functions directly from the humidifier. The app mainly adds remote adjustment, humidity history, 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 a weaker fit if you need guaranteed even humidification 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 shoppers who only need 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 an 8.5/10, Recommended with caveats verdict.
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