Product Overview
The Dreo UltraMist 3L Humidifier is designed to provide optimal humidity levels in your living space. Utilizing advanced ultrasonic technology, it disperses a fine, cool mist to cover areas up to 300 sq. ft. Its user-friendly design includes a convenient top-fill tank, a precise humidity sensor, and a soothing night light, ensuring a comfortable and balanced environment for your family, plants, and baby.
Key Features:
- Efficient Humidification: Releases cool mist at 250ml/hr, projecting up to 40 inches high with a 360° rotating nozzle for even distribution.
- Extended Runtime: 3L tank provides up to 30 hours of humidification in sleep mode, minimizing refills.
- Whisper-Quiet Operation: Operates at a low 26dB in Sleep Mode for undisturbed rest.
- Precision Humidity Control: Features a high-precision humidity sensor and auto mode for maintaining desired humidity levels.
- Aroma Pad Tray: Allows for the addition of essential oils to create a spa-like atmosphere.
- Easy Maintenance: Top-fill design simplifies refilling and cleaning. Compatible with demineralization and clean mist cartridges (sold separately).

Figure 1: The Dreo 3L Humidifier, showcasing its sleek design and digital display.

Figure 2: Perfect humidity control with auto mode and ambient light indicator.

Figure 3: All-night freshness and ultimate quietness with the humidifier operating at 26dB.

Figure 4: Check your room humidity in real-time with the high-precision humidistat.

Figure 5: Powerful mist for instant dryness relief, reaching up to 40 inches high.

Figure 6: All-day comfort with one tank, offering up to 30 hours of maximum runtime.

Figure 7: Simple to use, featuring an easy top-fill design, 360° adjustable nozzle, and built-in aroma pad tray.
Setup Guide
1. Unpacking and Placement
- Carefully remove the humidifier from its packaging.
- Place the humidifier on a flat, stable, and water-resistant surface at least 6 inches (15 cm) away from walls and furniture. Ensure the mist nozzle is not directed at walls or furniture.
- Avoid placing the humidifier on carpet or towels, as this may block the air inlet and cause malfunction.
2. Filling the Water Tank
- Remove the top cover of the humidifier.
- Fill the water tank directly from the top opening with clean, cool tap water. Do not exceed the "MAX" water level indicator. For best results and to prevent white dust, use distilled or demineralized water.
- Replace the top cover securely.

Figure 8: Easy top-fill design for convenient water refilling.
3. Power Connection
- Plug the power cord into a suitable electrical outlet. The display will light up briefly, indicating it is ready for operation.
Operating Instructions
1. Power On/Off
- Press the Power Button (power icon) to turn the humidifier on or off.
2. Adjusting Mist Level
- Press the Mist Level Button (mist icon) repeatedly to cycle through low, medium, and high mist output settings.
3. Auto Mode and Humidity Setting
- Press the Auto Mode Button (A icon) to activate Auto Mode. The humidifier will automatically adjust mist output to maintain a comfortable humidity level (default 50-60%).
- To set a target humidity, press the Humidity Setting Button (% icon) repeatedly to select your desired humidity level (e.g., 40% to 90% in 5% increments). The humidifier will operate until the target humidity is reached.

Figure 9: Control panel showing humidity display and various mode indicators.
4. Night Light Function
- Press the Light Button (light bulb icon) to turn the night light on or off. The light color changes based on the current humidity level (Dry: Orange, Comfort: Green, Wet: Blue).

Figure 10: The 3-color light feature provides a visual indication of the current humidity level.
5. Aroma Pad Tray
- Locate the aroma pad tray at the base of the humidifier.
- Add a few drops of your preferred essential oil onto the aroma pad. Do not add essential oils directly into the water tank.
- The humidifier will diffuse the aroma along with the mist.
Maintenance
Regular cleaning and maintenance are crucial for optimal performance and longevity of your humidifier. Always unplug the humidifier before cleaning.
1. Daily Maintenance
- Empty the water tank and base daily.
- Wipe down the tank and base with a clean, dry cloth.
2. Weekly Cleaning (Descaling)
- Unplug the humidifier and remove the top cover.
- Pour 1 cup (240ml) of white vinegar into the water tank and base.
- Let it soak for 20-30 minutes.
- Use a soft brush or cloth to clean the inside of the tank and the ultrasonic atomizer.
- Rinse thoroughly with clean water until the smell of vinegar is gone.
- Dry all parts completely before reassembling or storing.
3. Aroma Pad Cleaning
- Remove the aroma pad from its tray.
- Clean the pad with mild soap and water, then rinse thoroughly.
- Allow the pad to air dry completely before placing it back in the tray.
4. Filter Replacement (Optional)
- If using demineralization or clean mist cartridges, refer to the cartridge's instructions for replacement frequency.
- These cartridges help prevent limescale and white dust, and improve mist quality.
Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| Humidifier does not turn on. | No power supply; Unit malfunction. | Ensure the power cord is securely plugged into a working outlet. Try a different outlet. If the issue persists, contact customer support. |
| No mist or low mist output. | Low water level; Water tank not properly seated; Atomizer dirty; Air inlet blocked. | Refill the water tank. Ensure the water tank is correctly placed on the base. Clean the ultrasonic atomizer and water tank. Check if the air inlet at the bottom is clear. |
| White dust around the humidifier. | Hard water used. | Use distilled or demineralized water. Consider using a demineralization cartridge. Clean the humidifier regularly to remove mineral buildup. |
| Unusual noise. | Water level too low; Unit not on a flat surface; Foreign object in the water tank. | Refill the water tank. Place the humidifier on a flat, stable surface. Check for and remove any foreign objects. |
| Water leaking from the base. | Water tank not properly seated; Overfilled tank. | Ensure the water tank is correctly seated. Do not overfill the tank beyond the MAX line. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Dreo |
| Model Name | DR-HHM006 Snow White |
| Special Feature | Adjustable Humidity Control, Aroma Diffuser, Digital Display, Humidistat, Timer |
| Color | White |
| Filter Type | Demineralization |
| Floor Area Coverage | 300 Square Feet |
| Operation Mode | Ultrasonic |
| Product Dimensions | 7.6"D x 10.2"W x 7.6"H |
| Room Type | Bedroom, Kids Room, Nursery, Office, Study Room |
| Included Components | Humidifier Body, Power Cord, Water Tank |
| Voltage | 120 Volts (AC) |
| Wattage | 29 watts |
| Control Method | Touch |
| Item Weight | 3.94 pounds |
Warranty and Support
Dreo products are manufactured to the highest quality standards. For information regarding your product's warranty, please refer to the warranty card included in your product packaging or visit the official Dreo website.
If you encounter any issues or have questions about your Dreo Humidifier, please contact Dreo Customer Support for assistance. You can typically find contact information on the product packaging or the official Dreo website.
For additional protection, extended protection plans may be available for purchase. Please check with your retailer for details.





