1. Introduction
Thank you for choosing the Nexva 13L/3.43Gal Large Room Humidifier, Model H2418. This ultrasonic cool mist humidifier is designed to provide optimal humidity levels for large spaces up to 800 sq ft, ensuring a comfortable and healthy environment. With its generous 13-liter capacity, it offers up to 100 hours of continuous operation on a low setting, minimizing the need for frequent refills. This manual provides essential information for the safe and efficient use of your new humidifier.

Image: The Nexva 13L/3.43Gal Large Room Humidifier (Model H2418) in black, showcasing its sleek design and accompanying remote control.
2. Important Safety Instructions
To reduce the risk of fire, electric shock, or injury, please read and follow all instructions and warnings before using this appliance.
- Always place the humidifier on a firm, flat, water-resistant surface at least 6 inches (15 cm) away from walls and appliances.
- Do not immerse the base in water.
- Unplug the humidifier before filling, cleaning, or moving it.
- Do not operate the humidifier with a damaged cord or plug.
- Keep the humidifier out of reach of children and pets.
- Use only clean, cool tap water or distilled water. Do not add essential oils directly into the water tank; use the designated aroma pad tray.
- Do not block air vents.
- If the humidifier emits unusual sounds, smells, or smoke, unplug it immediately and contact customer support.
3. Product Overview
3.1 Components
- Main Unit: Houses the control panel, mist outlet, and water tank.
- Water Tank: 13L (3.43Gal) capacity with a visible water window and carry handle.
- Control Panel: Digital display and touch buttons for various functions.
- Mist Nozzle: 360° rotatable for directional mist output.
- Aroma Pad Tray: For adding essential oils.
- Scale-inhibitor Cartridge: Helps reduce mineral buildup.
- Remote Control: For convenient operation.
- Cleaning Brush: For maintenance.

Image: Close-up of the humidifier's water level indicator (13L Max, 10L, 7L) and the digital control panel.
3.2 Control Panel & Remote Functions
- ON/OFF/SLEEP: Power on/off the unit, activate sleep mode.
- TIMER: Set operation timer (1-24 hours).
- MIST: Adjust mist output level (Low, Medium, High).
- HUMIDITY: Set desired humidity level (Auto Humidity Control).
- UV LAMP: Activate UV sterilization.
- COLOR LIGHT: Turn on/off the decorative night light.
4. Setup Guide
- Unpack: Carefully remove all components from the packaging. Ensure all protective materials are removed.
- Placement: Place the humidifier on a flat, stable surface. Ensure it is away from direct sunlight, heat sources, and electronic devices.
- Fill Water Tank:
- Open the top cover of the humidifier.
- Pour clean, cool tap water or distilled water directly into the water tank. Do not exceed the "MAX" line (13L).
- Close the top cover securely.
- Add Essential Oils (Optional):
- Locate the aroma pad tray on the side/back of the unit.
- Pull out the tray and add 3-5 drops of your preferred essential oil onto the pad.
- Slide the tray back into place.
- Power On: Plug the power cord into a standard electrical outlet. The unit will beep once, and the display will show the current room temperature and humidity.

Image: Demonstrates the easy top-fill design of the humidifier, with a hand pouring water directly into the tank.
Video: A user unboxes and sets up the Nexva Humidifier, demonstrating the ease of assembly and top-fill water addition. This video is provided by a seller-affiliated creator.
5. Operating Instructions
5.1 Power On/Off & Sleep Mode
- Press the ON/OFF/SLEEP button on the control panel or remote to turn the unit on/off.
- Press and hold the ON/OFF/SLEEP button for 3 seconds to activate Sleep Mode. In this mode, the display lights will dim, and the humidifier will operate quietly. Press any button to exit Sleep Mode.
5.2 Mist Output Adjustment
- Press the MIST button repeatedly to cycle through Low, Medium, and High mist output levels.
5.3 Auto Humidity Control
- Press the HUMIDITY button to set your desired humidity level (e.g., 40% - 60%). The humidifier will automatically adjust mist output to maintain this level within ±5% accuracy.

Image: The humidifier's digital display showing auto humidity control in action, with a target range of 40% to 90% and a precision of ±5%.
5.4 Timer Function
- Press the TIMER button to set the operating time from 1 to 24 hours. The humidifier will automatically turn off once the set time expires.
5.5 UV Lamp & Color Light
- Press the UV LAMP button to activate the UV sterilization function.
- Press the COLOR LIGHT button to turn on/off the decorative night light.
Video: A user demonstrates the assembly and various operational features of the Nexva Humidifier, including mist output and controls. This video is provided by a seller-affiliated creator.
6. Maintenance
Regular cleaning is essential for optimal performance and hygiene.
6.1 Daily Maintenance
- Empty and rinse the water tank and base daily.
- Wipe down any wet surfaces with a clean, dry cloth.
6.2 Weekly Cleaning
- Descaling: Mix 1 teaspoon of white vinegar with 1 cup of water. Pour the solution into the water tank and let it sit for 30 minutes. Gently scrub the tank and base with the provided cleaning brush to remove mineral buildup. Rinse thoroughly with clean water.
- Aroma Pad Tray: Clean the aroma pad tray with warm water and mild soap. Rinse and dry completely before reinserting.
- Scale-inhibitor Cartridge: Rinse the cartridge under running water. Replace every 3-6 months depending on water hardness and usage.
Caution: Do not use harsh chemicals or abrasive cleaners. Do not immerse the main unit in water.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output | Low water level; mineral buildup; mist nozzle blocked. | Refill water tank; clean the transducer and water tank; ensure mist nozzle is clear. |
| Unusual odor | Stagnant water; dirty water tank. | Empty and clean the water tank and base thoroughly. Use fresh water. |
| Water leakage | Water tank not properly seated; damaged tank. | Ensure the water tank is correctly placed on the base; check for cracks or damage. |
| Unit not turning on | Not plugged in; power outage; water shortage protection activated. | Check power connection; ensure power supply; refill water tank. |
8. Product Specifications
| Feature | Detail |
|---|---|
| Brand | Nexva |
| Model Name | H2418 |
| Capacity | 13L (3.43Gal) |
| Coverage Area | Up to 800 sq ft |
| Max Mist Output | 350mL/h |
| Max Runtime | 100 hours (on low setting) |
| Noise Level | <35dB |
| Operation Mode | Ultrasonic Cool Mist |
| Special Features | Auto Humidity Control, Top Fill, Aroma Diffuser, Sleep Mode, 24H Timer, Auto Shut-off, Remote Control, UV Lamp, 360° Rotation Nozzle, Decorative Night Light |
| Product Dimensions | 6.69"D x 8.27"W x 24.8"H |
| Item Weight | 6.6 Pounds |
| Wattage | 30 watts |
9. Warranty & Customer Support
Nexva offers a hassle-free 12-month warranty for this product. If you have any questions, require support, or encounter any issues, please do not hesitate to contact our friendly customer service team. Your satisfaction is our greatest motivation.
For assistance, please refer to the contact information provided in your product packaging or visit the official Nexva website.
Note: Keep your purchase receipt for warranty claims.
