Honeywell Humidifier MINI MIST HUL545 Series Manual

The Honeywell Humidifier MINI MIST HUL545 Series is a compact, ultrasonic cool mist humidifier designed for small to medium rooms. It features a 0.5-gallon tank capacity, adjustable mist output control, 360-degree mist nozzle, auto shut-off when empty, optional night light, and quiet operation. Ideal for improving air quality and relieving dryness. Below are key sections for safety, features, installation, setup, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: Water tank, base unit with ultrasonic nebulizer, mist nozzle, control knob, power adapter, and optional night light.

Feature	Description
Ultrasonic Technology	Produces a fine, cool mist using high-frequency vibrations
Adjustable Mist Control	Knob to adjust mist output from low to high
360-Degree Mist Nozzle	Direct mist in any direction for optimal coverage
Auto Shut-Off	Automatically turns off when water tank is empty
0.5-Gallon Tank Capacity	Suitable for up to 24 hours of operation on low setting
Quiet Operation	Designed for bedroom, office, or nursery use
Optional Night Light	Soft blue light that can be turned on/off
Compact Design	Lightweight and portable for easy placement
Removable Tank	Easy to fill and clean
Power Indicator Light	LED shows when unit is powered on

Installation & Setup

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

Remove tank: Lift water tank from base unit.
Fill tank: Turn tank upside down, remove cap, and fill with cool, distilled or demineralized water (recommended). Replace cap securely.
Reassemble: Place tank back onto base, ensuring it sits firmly.
Position nozzle: Adjust 360-degree mist nozzle to desired direction.
Plug in: Connect power adapter to base unit and then to a standard 120V AC outlet.

WARNING! Use only distilled or demineralized water to minimize white dust. Do not use hot water or add fragrances/oils unless specified.

First-Time Use

After setup, follow these steps to begin operation.

Power on: Plug in unit; power indicator light will illuminate.
Adjust mist: Turn control knob clockwise to increase mist output, counterclockwise to decrease.
Night light: If equipped, press the light button to turn night light on/off.
Monitor operation: Ensure mist is emitting from nozzle. Unit will run until tank is empty or turned off.

CAUTION! Place humidifier on a water-resistant surface. Keep out of reach of children and pets.

Specifications

Model Series: HUL545 (MINI MIST Series)
Tank Capacity: 0.5 gallons (1.9 liters)
Coverage Area: Up to 250 square feet
Run Time: Up to 24 hours on low setting
Mist Output: Adjustable, up to 1.5 gallons per day
Technology: Ultrasonic cool mist
Power Supply: 120V AC, 60Hz, adapter included
Power Consumption: Low energy use
Dimensions: Compact design (approx. 10" H x 7" W)
Weight: Lightweight (approx. 2.5 lbs empty)
Warranty: Limited 1-year warranty

Controls and Operation

Simple controls located on the base unit.

Control Knob: Rotate to adjust mist output. Turn fully counterclockwise to OFF position.

Night Light Button (if equipped): Press to toggle soft blue light on/off.

Power Indicator: LED glows when unit is plugged in and powered.

Operation Tips: For best results, use in a closed room. Adjust mist level based on room humidity. Refill tank when empty (auto shut-off will activate).

Maintenance & Cleaning

Regular cleaning prevents mold, bacteria, and mineral buildup.

Unplug unit and remove water tank.
Empty any remaining water from tank and base.
Clean tank: Fill with a mixture of white vinegar and water (1:1 ratio). Let sit for 20 minutes, then scrub with soft brush. Rinse thoroughly.
Clean base: Wipe nebulizer and interior with a soft, damp cloth. Do not submerge base in water.
Dry completely: Allow all parts to air dry before reassembly.
Frequency: Clean every 1-2 weeks with regular use; more often if using hard water.

Tip: Using distilled water reduces cleaning frequency and minimizes white dust.

Safety Features

Auto Shut-Off: Turns off unit when water level is too low, protecting the nebulizer.

Tip-Over Protection: Unit is designed to minimize leakage if tipped, but always use on a flat surface.

Low Voltage Adapter: Included power adapter is safety certified.

WARNING! Never operate without water. Do not block mist nozzle. Unplug before cleaning or when not in use for extended periods.

Care & Storage

When not in use for extended periods:

Unplug unit and empty all water from tank and base.
Clean thoroughly as per maintenance instructions.
Allow all parts to dry completely.
Reassemble and store in original box or protective cover in a cool, dry place.

CAUTION! Do not store with water inside to prevent mold or damage.

Regulatory Information

FCC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that it does not cause harmful interference. UL Listed: Meets safety standards. For support, visit www.honeywellhumidifiers.com or contact Honeywell Customer Service at 1-800-332-1110.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Empty tank, low water, knob at OFF	Refill tank with water; adjust knob to higher setting.
Low mist output	Mineral buildup, low setting	Clean nebulizer and tank; increase mist control.
White dust on surfaces	Hard water minerals	Use distilled or demineralized water; clean unit regularly.
Unit not powering on	Not plugged in, faulty outlet	Check power connection; try different outlet.
Water leakage	Tank not seated properly, cracked tank	Ensure tank is firmly placed; inspect for damage.
Unusual noise	Debris in water, low water level	Clean tank and base; refill with fresh water.
Night light not working	Button not pressed, LED issue	Press button firmly; if persists, contact support.

Reset: Unplug unit for 5 minutes, then restart.

Service: 1-800-332-1110; www.honeywellhumidifiers.com