Levoit Humidifier LV455CH Manual

The Levoit LV455CH 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 humidity sensor with auto mode, a night light with dimming options, a timer, essential oil diffuser tray, and a top-fill design for easy refilling. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 4.5L Water Tank, 360° Rotating Nozzle, Control Panel, Built-in Humidity Sensor, Essential Oil Tray, Night Light, and Power Adapter.

Installation & Setup

Unpack and inspect all contents. Place on a stable, flat, and level surface away from direct sunlight and electronics.

1. Remove all packaging materials from the humidifier and base.
2. Separate the water tank from the base by lifting the tank straight up.
3. Fill the tank with clean, cool tap water or distilled water (recommended to minimize white dust). Do not overfill.
4. Place the filled tank back onto the base, ensuring it is seated properly.
5. Plug the power adapter into the humidifier's DC input port, then into a standard 120V AC wall outlet.

WARNING! Do not use the humidifier on carpet or a wet surface. Keep out of reach of children.

First-Time Use

Power on the humidifier; the control panel will illuminate.

1. Press the POWER button to turn on the unit. It will start in the last used mode or Auto mode by default.
2. Select Mist Level: Press the MIST button to cycle through Low, Medium, High, and Auto settings. The corresponding LED will light up.
3. Set Target Humidity (Auto Mode): In Auto mode, press the HUMIDITY button to set your desired humidity level (40%-80% RH). The sensor will maintain this level.
4. Set the Timer: Press the TIMER button to set a shut-off duration (1-12 hours). The timer LED will indicate the set time.
5. Adjust Night Light: Press the LIGHT button to cycle through High, Low, and Off settings.

CAUTION! Always use clean water. Never add essential oils directly into the water tank.

Specifications

• Model: LV455CH
• Tank Capacity: 4.5 Liters (1.2 Gallons)
• Room Coverage: Up to 505 sq. ft.
• Run Time: Up to 60 hours on low setting
• Mist Output: Up to 300 mL/hr
• Noise Level: ≤ 30 dB
• Power Consumption: 25W
• Power Input: 120V AC, 60Hz
• Dimensions (L x W x H): 10.6" x 7.1" x 13.4"
• Weight: 4.6 lbs
• Water Type: Tap or Distilled (Distilled recommended)

Controls and Settings

Access all functions via the touch control panel on the front of the unit.

Control Panel Buttons: POWER, MIST (Level/Auto), HUMIDITY (Target Set), TIMER, LIGHT.

Mist Settings: Low (quiet, long runtime), Medium (balanced), High (maximum output), Auto (sensor-controlled). Humidity Setting: Adjust target from 40% to 80% RH in 5% increments. Timer: 1-12 hours in 1-hour increments. Night Light: High, Low, Off. Indicator Lights: Power On, Mist Level, Target Humidity, Timer, Low Water (flashes when tank is empty).

Operation Modes

Manual Mode: Select Low, Medium, or High mist level for constant output. Auto Mode: The built-in sensor monitors room humidity and adjusts mist output to maintain your set target. Sleep Mode: Press and hold the LIGHT button for 3 seconds to activate. All panel lights except the power indicator turn off, and the unit runs at the lowest settings.

1. For general use, select Auto mode for optimal comfort.
2. For nighttime, use Sleep mode or set a timer for automatic shut-off.
3. Rotate the 360° nozzle to direct mist away from walls, furniture, and electronics.

Tip: Place the humidifier at least 12 inches away from walls and on a waterproof surface.

Maintenance & Cleaning

Regular cleaning prevents mold, bacteria, and mineral buildup.

1. Daily: Empty and rinse the water tank if not in use for more than 24 hours.
2. Weekly Cleaning:
   • Unplug the unit and remove the water tank.
   • Clean the tank with a soft brush and a mixture of white vinegar and water (1:1 ratio). Swirl and rinse thoroughly.
   • Wipe the base and ultrasonic plate with a damp cloth. Do not submerge the base in water.
   • Dry all parts completely before reassembly.
3. Descaling (Monthly or as needed): For areas with hard water, use undiluted white vinegar in the tank, let sit for 15-20 minutes, then scrub and rinse.

WARNING! Never use abrasive cleaners, bleach, or detergents. Always unplug before cleaning.

Using Essential Oils

The LV455CH has a dedicated essential oil tray located near the nozzle.

1. Ensure the humidifier is off and unplugged.
2. Pull out the small rectangular essential oil tray.
3. Add 3-5 drops of your preferred 100% pure essential oil onto the absorbent cotton pad inside the tray.
4. Slide the tray back into its slot.
5. Operate the humidifier as normal. The mist will carry the aroma.

CAUTION! NEVER add oils, water, or any liquid directly into the water tank, base, or mist nozzle. This can damage the unit and void the warranty. Clean the oil tray weekly with rubbing alcohol.

Safety Information

• Use only the provided power adapter.
• Do not operate the humidifier without water.
• Place on a stable, level, and moisture-resistant surface.
• Keep out of reach of children and pets.
• Do not cover the mist outlet or air inlet/outlet vents.
• Do not move the unit while it is in operation or filled with water.
• If the power cord is damaged, it must be replaced by the manufacturer or a qualified service agent.
• This appliance is not intended for use by persons with reduced physical, sensory, or mental capabilities.

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 rights reserved. Levoit is a registered trademark of Vesync Co., Ltd. For support, visit www.levoit.com or contact customer service at 1-866-376-0314.

Troubleshooting

Reset: Unplug the unit for 5 minutes to reset the electronic controls.

Service: For warranty service or further assistance, contact Levoit Customer Support at 1-866-376-0314 or visit support.levoit.com.