Levoit Humidifier LV450CH Manual

The Levoit LV450CH is a 4.5L Cool Mist Ultrasonic Humidifier designed for medium to large rooms. It features a 360° nozzle, adjustable mist levels, a built-in essential oil diffuser tray, a night light with auto-off function, a 12-hour timer, and a smart humidity sensor for automatic operation. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Installation & Setup 3. First-Time Use 4. Specifications 5. Controls and Settings 6. Operation Modes 7. Adding Essential Oils 8. Maintenance & Cleaning 9. Safety Information 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 4.5L Water Tank, Ultrasonic Mist Generator, 360° Adjustable Nozzle, Control Panel, Essential Oil Tray, Night Light, Humidistat Sensor.

Feature	Description
Water Tank Capacity	4.5 Liters (1.2 Gallons)
Mist Output	Up to 300 mL/h, 3 adjustable levels
Run Time	Up to 40 hours on low setting
Room Coverage	Up to 430 sq ft (40 sq m)
Essential Oil Diffuser	Built-in tray for aromatherapy
Night Light	7-color changing LED with on/off option
Timer	1-12 hours programmable
Auto Mode	Smart sensor maintains set humidity (40%-60% RH)
Noise Level	< 30 dB (Quiet operation)
Power	AC 120V, 60Hz, 24W

Installation & Setup

Unpack and inspect all parts. Place on a flat, stable, and waterproof surface away from electronics.

Remove the water tank from the base.
Fill the tank with clean, cool tap water (do not exceed MAX line).
Securely reattach the tank to the base, ensuring it sits level.
Plug the power adapter into the unit and then into a standard 120V AC outlet.
Ensure the unit is placed at least 12 inches away from walls and furniture for optimal mist dispersion.

WARNING! Do not use with damaged cord or plug. Do not place on carpets or uneven surfaces where it may tip over.

First-Time Use

Power on the humidifier; the control panel will illuminate.

Press the POWER button to turn on the unit.
Select your desired mist level (LOW, MED, HIGH) using the MIST button.
To use Auto Mode, press the AUTO button. The humidistat will maintain the preset humidity level.
To set the timer, press TIMER and use +/- buttons to set duration (1-12 hrs).
Press the LIGHT button to cycle through night light colors or turn it off.

CAUTION! Use only clean, cool water. Do not add essential oils directly into the water tank. Use the designated tray only.

Specifications

Model: LV450CH
Tank Capacity: 4.5L (1.2 gal)
Coverage Area: Up to 430 sq ft
Mist Output: 300 mL/h max
Operating Time: Up to 40 hours (Low)
Noise Level: < 30 dB
Power Consumption: 24W
Power Supply: 120V AC, 60Hz
Product Dimensions: 10.6" x 7.1" x 10.2"
Weight: 4.2 lbs (empty)
Water Filter: Optional (Model LV-FH01)

Controls and Settings

Control Panel: POWER, MIST (Level), AUTO, TIMER, LIGHT, +/- Buttons.

Remote Control (if included): POWER, MIST, AUTO, TIMER, LIGHT.

Mist Levels: LOW (quiet, long runtime), MED (balanced), HIGH (maximum output). Auto Mode: Sensor maintains 50% RH by default; adjust target with +/- buttons. Timer: Set 1-12 hours; unit will auto power off. Night Light: 7 colors (Blue, Green, Red, etc.) or OFF. Essential Oil Tray: Small removable tray on top of unit.

Operation Modes

Manual Mode: Select mist level (LOW/MED/HIGH). Mist output is constant. Auto Mode: Unit uses built-in sensor to detect room humidity and automatically adjusts mist output to maintain your set target (40%-60% RH). Sleep Mode: Press and hold LIGHT button for 3 seconds to enter. All panel lights turn off except power indicator, and mist runs on LOW.

Adding Essential Oils

Ensure the humidifier is off and unplugged.
Locate the small essential oil tray on the top of the unit.
Add 3-5 drops of 100% pure essential oil into the tray. DO NOT add oil directly to the water tank.
Replace the tray. The mist will carry the aroma as it operates.
Clean the tray regularly with water and a soft cloth to prevent clogging.

Tip: Use oils sparingly. Strong citrus or resinous oils may require more frequent tray cleaning.

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup. Clean every 3-7 days of use.

Daily: Empty and refill the tank with fresh water.
Weekly Cleaning: Unplug unit. Empty tank. Clean tank and base with a soft cloth and a mixture of white vinegar and water (1:1). Rinse thoroughly.
Descaling (Monthly): For hard water areas, use a descaling solution or vinegar soak for 15-20 minutes to remove mineral deposits from the ultrasonic plate.
Drying: Allow all parts to air dry completely before reassembly or storage.
Filter (Optional): If using the water filter, replace it every 2-3 months or as needed.

CAUTION! Never immerse the base unit in water. Do not use abrasive cleaners or brushes.

Safety Information

Use only with 120V AC outlet.
Always unplug before cleaning, filling, or moving.
Use clean, cool tap water only. Do not use hot water.
Keep out of reach of children and pets.
Do not operate without water in the tank.
Do not block the mist outlet or air intake.
Place on a waterproof, level surface.
If the unit is tipped over, unplug immediately, empty water, and let dry completely before reuse.

Regulatory Information

FCC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. Copyright © Levoit. All trademarks are the property of their respective owners. For customer support, visit www.levoit.com or contact 1-888-726-8520.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Empty tank / Low water	Fill tank with water above MIN line.
Weak mist	Mineral buildup / Low setting	Clean ultrasonic plate; Increase mist level.
Water leaking	Tank not seated properly / Crack	Check tank seal and placement; Inspect for damage.
Unit not powering on	No power / Faulty outlet	Check plug connection; Try a different outlet.
Unusual noise	Vibration / Debris in water	Place on level surface; Use filtered or distilled water.
White dust around unit	Hard water minerals	Use distilled or demineralized water; Clean more frequently.
Auto mode not working	Sensor blocked / High ambient humidity	Ensure sensor area is clean and unobstructed.

Reset: Unplug for 2 minutes, then restart. Service: For issues not resolved above, contact Levoit Customer Support at 1-888-726-8520 or www.levoit.com/support.