1. Introduction
Thank you for choosing the TROTEC B 4 E Ultrasonic Humidifier. This device is designed to improve indoor air quality by converting tap water into a fine, refreshing mist, effectively humidifying rooms up to 24 m² or 60 m³. With its 4.2-liter water tank, it can operate for up to 16 hours continuously. The B 4 E features three adjustable mist levels, a programmable timer, and an integrated aroma diffuser for enhanced comfort. Please read this manual carefully before initial operation to ensure safe and efficient use.
2. Safety Instructions
- Always place the humidifier on a stable, flat, and water-resistant surface.
- Do not place the unit near heat sources or in direct sunlight.
- Keep out of reach of children and pets.
- Use only clean tap water. Do not add essential oils directly into the water tank; use the designated aroma diffuser compartment.
- Unplug the device before filling, cleaning, or moving it.
- Do not immerse the main unit in water or other liquids.
- Ensure the mist outlet is not blocked.
- If the power cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons to avoid a hazard.
3. Product Overview
The TROTEC B 4 E humidifier is designed for ease of use and effective humidification. Familiarize yourself with its components and controls.

Figure 1: Overall view of the TROTEC B 4 E Humidifier with its dimensions.

Figure 2: Key features of the TROTEC B 4 E Humidifier.
Control Panel

Figure 3: Detailed view of the control panel.
- Power Button: Turns the device on/off.
- Mist Level Button: Cycles through 3 mist output levels (1, 2, 3).
- Timer Button: Sets the operating time (2h, 4h, 6h, 12h).
- UV Light Button: Activates/deactivates the UV sterilization function.
- LED Illumination Button: Controls the internal LED light.
4. Setup
- Unpack: Carefully remove the humidifier from its packaging. Retain packaging for future storage or transport.
- Placement: Place the unit on a firm, level, and water-resistant surface at least 15 cm away from walls and furniture.
- Fill Water Tank:
- Remove the top cover of the humidifier.
- Fill the 4.2-liter water tank with clean tap water. Do not exceed the maximum fill line.

Figure 4: Filling the water tank.
- Replace Cover: Securely place the top cover back onto the unit.
- Connect Power: Plug the power adapter into a suitable electrical outlet. The unit is now ready for operation.
5. Operating Instructions
Once set up, operate the humidifier using the touch control panel.

Figure 5: Humidifier in a typical room setting.
- Power On/Off: Press the Power Button to turn the humidifier on. Press again to turn it off.
- Adjust Mist Level: Press the Mist Level Button repeatedly to select your desired mist output: Level 1 (low), Level 2 (medium), or Level 3 (high).
- Set Timer: Press the Timer Button to set the operating duration. Options include 2, 4, 6, or 12 hours. The unit will automatically shut off after the selected time.
- UV Sterilization: Press the UV Light Button to activate the internal UV lamp, which helps sterilize the water and mist. Press again to deactivate.
- LED Illumination: Press the LED Illumination Button to turn the internal light on or off.
- Aroma Diffuser: Locate the aroma compartment (usually a small tray) on the side or back of the unit. Add a few drops of essential oil to the aroma pad. Do not add oils directly into the water tank.
The humidifier will automatically shut off when the water tank is empty.
6. Maintenance
Regular cleaning and maintenance ensure optimal performance and longevity of your humidifier.

Figure 6: UV light function for water purification.
- Daily Maintenance:
- Empty and rinse the water tank daily.
- Wipe the base and mist outlet with a clean, damp cloth.
- Weekly Cleaning:
- Unplug the unit. Remove the water tank.
- Fill the tank with a mixture of water and white vinegar (1:1 ratio) and let it sit for 30 minutes to descale.
- Clean the ultrasonic nebulizer and other internal components with a soft brush or cloth.
- Rinse all parts thoroughly with clean water until the vinegar smell is gone.
- Clean the aroma pad in the aroma compartment or replace it if necessary.
- Storage: If not in use for an extended period, clean and dry the unit thoroughly before storing it in a cool, dry place.
7. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output | Low water level; clogged nebulizer; fan malfunction. | Refill water tank; clean nebulizer; contact support if fan is faulty. |
| Unusual odor | Dirty water or tank; new unit smell. | Clean tank and replace water; the smell should dissipate after initial use. |
| Water leakage | Tank not properly seated; damaged tank. | Ensure tank is correctly placed; check for cracks and replace if damaged. |
| Unit not turning on | No power; water tank empty; power button not pressed. | Check power connection; refill water tank; press power button firmly. |
8. Specifications
| Brand | TROTEC |
| Model Name | B 4 E |
| Model Number | 1160000053 |
| Product Dimensions | 18.5 x 18.5 x 30.5 cm |
| Weight | 2 kg |
| Water Tank Capacity | 4.2 Liters |
| Voltage | 24 V |
| Operation Duration | Up to 16 hours |
| Coverage Area | Up to 24 m² |
| Operating Mode | Ultrasonic |
| Control Method | Touch |
| Special Features | Aroma Diffuser, Timer, UV Sterilization |
| First Available Date | January 26, 2022 |
| GTIN | 04052138113981 |
9. Warranty and Support
This product comes with a standard manufacturer's warranty. Please refer to the warranty card included in your product packaging for specific terms and conditions. For technical support, troubleshooting assistance, or warranty claims, please contact TROTEC customer service through their official website or the contact information provided with your purchase.





