Introduction
The BONECO U300 Ultrasonic Humidifier is designed to provide efficient and user-friendly humidification for your living space. Utilizing high-frequency technology, it transforms water into a fine mist, circulating it to maintain optimal indoor humidity levels. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your BONECO U300 humidifier.
Figure 1: Front view of the BONECO U300 Ultrasonic Humidifier, showcasing its sleek white design and water level window.
Safety Instructions
Please read all safety instructions carefully before operating the appliance. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always place the humidifier on a stable, flat, and water-resistant surface. Avoid placing directly on wooden furniture without protection, as prolonged mist exposure may cause damage.
- Do not immerse the appliance, power cord, or plug in water or other liquids.
- Unplug the humidifier from the power outlet before filling, cleaning, or performing any maintenance.
- Keep out of reach of children and pets.
- Use only clean, cool tap water. Distilled or demineralized water is recommended to minimize white dust residue.
- Do not add essential oils directly into the water tank. Use the designated fragrance tray for essential oils.
- Ensure the mist outlet is not obstructed.
- Do not operate the humidifier if the cord or plug is damaged, or if the appliance malfunctions or has been dropped.
Setup
- Unpack: Carefully remove all packaging materials and ensure all components are present: Humidifier unit, A250 AQUA PRO filter, EZCal Cleaner, Cleaning brush, and Quick Setup Guide.
- Placement: Place the humidifier on a firm, level surface at least 6 inches (15 cm) away from walls and furniture. For optimal mist distribution, consider placing it on an elevated surface.
- Filter Installation: The A250 AQUA PRO filter should be pre-installed. If not, follow the instructions in the Quick Setup Guide to install it in the water tank.
- Fill Water Tank: Open the top lid of the humidifier. Fill the water tank directly from the top with clean, cool tap water. Do not exceed the "MAX" fill line. The unit has a capacity of 1.8 gallons.
- Connect Power: Plug the power cord into a suitable electrical outlet (1.1E+2 Volts).
Figure 2: Demonstrates the top-fill feature of the BONECO U300, allowing for easy water replenishment.
Operating Instructions
- Power On/Off: Turn the control dial clockwise from the "OFF" position to power on the unit. The blue light around the dial will illuminate. Turn the dial counter-clockwise to the "OFF" position to power off.
- Adjust Mist Output: Continue turning the control dial clockwise to increase the mist output. Turn it counter-clockwise to decrease the mist output. The U300 offers adjustable mist levels to suit your preference.
- Essential Oil Use: The humidifier features a fragrance tray for essential oils. Pull out the small tray located at the base of the unit. Add a few drops of your preferred essential oil onto the felt pad in the tray. Slide the tray back into place. Do not add essential oils directly into the water tank.
- Low Water Indicator & Auto Shut-off: The unit is equipped with a low-level indicator light. When the water level is low, the light will change, and the unit will automatically shut off to prevent damage. Refill the water tank to resume operation.
Figure 3: The BONECO U300 emitting a visible cool mist, indicating active humidification.
Figure 4: A hand adding essential oil drops to the fragrance tray of the BONECO U300.
Maintenance
Regular cleaning and maintenance are crucial for optimal performance and longevity of your BONECO U300 humidifier.
Daily Maintenance:
- Empty and rinse the water tank daily.
- Wipe down the mist outlet and the inside of the lid to remove any condensation.
Weekly Maintenance:
- Cleaning the Water Tank: Unplug the unit. Remove the water tank. Use the provided cleaning brush to scrub the inside of the tank and remove any mineral deposits or slime. Rinse thoroughly.
- Descaling: Use the EZCal Cleaner (or a descaling solution like white vinegar) to remove stubborn mineral deposits. Follow the instructions on the EZCal Cleaner packaging. For vinegar, mix equal parts white vinegar and water, pour into the base, let it sit for 30 minutes, then scrub and rinse.
- Transducer Cleaning: Gently clean the transducer (the small metal disc at the bottom of the water tank) with the cleaning brush. Do not use abrasive materials.
Filter Replacement:
The A250 AQUA PRO filter should be replaced regularly, typically every 2-3 months, depending on water hardness and usage. A low mist output or increased white dust may indicate the need for filter replacement.
- Unplug the humidifier and empty the water tank.
- Remove the old A250 AQUA PRO filter.
- Insert a new A250 AQUA PRO filter, ensuring it is securely seated.
- Refill the water tank and resume operation.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist output | Water tank empty; Unit not plugged in; Transducer dirty. | Refill water tank; Check power connection; Clean transducer. |
| White dust around unit | Hard water used; Filter needs replacement. | Use distilled/demineralized water; Replace A250 AQUA PRO filter. |
| Unpleasant odor | Stagnant water; Dirty water tank/base. | Empty and clean water tank and base thoroughly; Use fresh water daily. |
| Unit is noisy | Unit not on a flat surface; Internal components vibrating. | Ensure unit is on a stable, flat surface. A continuous soft motor noise is normal. |
Specifications
- Brand: BONECO
- Model Name: U300
- Special Feature: Manual control
- Color: White
- Filter Type: A250 AQUA PRO
- Floor Area: Up to 540 Square Feet
- Operation Mode: Ultrasonic
- Product Dimensions (L x W x H): 12.12" x 6.49" x 12.79"
- Item Weight: 7.7 Pounds
- Room Type: Bedroom, Living Room, Office
- Included Components: Ultrasonic Humidifier, Aqua Pro Filter, EZCal Cleaner, Cleaning brush, Quick Setup Guide
- Voltage: 110 Volts
- Wattage: 27 watts
- Control Method: Touch (dial)
- UPC: 834546000947
Figure 5: Diagram showing the dimensions of the BONECO U300 Humidifier.
Warranty and Support
The BONECO U300 Ultrasonic Humidifier comes with a 3-year warranty. For warranty claims, technical support, or any inquiries regarding your product, please contact BONECO North America Corp. customer service. Refer to the Quick Setup Guide or visit the official BONECO website for contact information.
For additional resources, you may visit the BONECO Store on Amazon.





