Honeywell Humidifier MISTMATE HUL520BC Manual

The Honeywell Humidifier MISTMATE HUL520BC is a compact, cool mist humidifier designed for small to medium-sized rooms. It features a 0.5-gallon tank capacity, adjustable mist output control, a quiet fan, an auto-shutoff function when empty, and an easy-to-clean design. Ideal for improving air quality and relieving dryness. 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 Operation 6. Maintenance & Cleaning 7. Safety Features 8. Care Instructions 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Water Tank, Base Unit, Mist Nozzle, Control Knob, Power Cord.

Feature	Description
Water Tank Capacity	0.5 gallons (1.9 liters)
Mist Output Control	Adjustable knob for low to high mist settings
Run Time	Up to 12 hours on low setting
Auto Shut-Off	Turns off automatically when tank is empty
Quiet Operation	Designed for minimal noise during use
Easy-Fill Tank	Wide opening for convenient refilling
Compact Design	Fits easily on desks, nightstands, or tables
360° Mist Nozzle	Adjustable direction for optimal mist distribution
Filter-Free	No replacement filters required
Power Indicator Light	LED light shows when unit is powered on

Installation & Setup

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

Remove the water tank from the base unit.
Fill the tank with cool, clean tap water. Do not overfill.
Securely reattach the tank to the base, ensuring it is properly seated.
Place the humidifier at least 12 inches away from walls and furniture for proper air circulation.
Plug the power cord into a standard 120V AC outlet.

WARNING! Always place the humidifier on a water-resistant surface. Do not place on carpets or delicate surfaces where moisture could cause damage.

First-Time Use

Before first use, clean the tank as described in the Maintenance section.

Ensure the unit is unplugged and the tank is filled with clean, cool water.
Place the tank on the base and plug the power cord into the outlet.
Turn the control knob to the desired mist setting (Low, Medium, High).
The power indicator light will illuminate, and mist should begin to emit from the nozzle within a few minutes.
Adjust the 360° nozzle to direct mist away from walls, electronics, and furniture.

CAUTION! Use only clean, cool tap water. Do not use hot water, distilled water with additives, or essential oils, as this can damage the unit and void the warranty.

Specifications

Model: HUL520BC (MISTMATE)
Tank Capacity: 0.5 gallons (1.9 liters)
Coverage Area: Up to 250 square feet
Run Time: Up to 12 hours (Low setting)
Mist Output: Adjustable, up to 1.2 gallons per day
Power Consumption: 25W
Power Source: 120V AC, 60Hz
Unit Dimensions (HxWxD): 10.2" x 7.1" x 7.1"
Weight (Empty): 2.2 lbs
Noise Level: < 30 dB on low setting
Warranty: 1-Year Limited Warranty

Controls and Operation

Primary control is a single knob on the front of the base unit.

Control Knob Positions:
OFF: Unit is powered off.
LOW (I): Minimum mist output for quiet, overnight use.
MEDIUM (II): Moderate mist output for average room conditions.
HIGH (III): Maximum mist output for quickly raising humidity levels.

Power Indicator Light: A blue LED illuminates when the unit is plugged in and the control knob is turned to any setting other than OFF.

Auto Shut-Off: The unit will automatically power off when the water tank is empty. The indicator light will remain on until the unit is unplugged or turned to OFF.

Maintenance & Cleaning

Regular cleaning prevents mineral buildup and microbial growth. Clean at least once a week during use, or more often in hard water areas.

Unplug the unit and remove the water tank.
Empty any remaining water from the tank and base.
Fill the tank with a mixture of 1 cup white vinegar and 1 gallon of clean water. Let it sit for 20 minutes.
Gently scrub the inside of the tank with a soft brush or cloth. Do not use abrasive cleaners.
Rinse the tank thoroughly with clean water several times to remove all vinegar residue.
Wipe the exterior of the unit and the base with a damp cloth. Do not immerse the base in water.
Allow all parts to air dry completely before reassembling and using.

Tip: For daily maintenance, empty and refill the tank with fresh water every day to keep water clean.

Safety Features

Auto Shut-Off: Protects the unit from running dry and overheating.

Tip-Over Protection: The unit is designed to minimize leakage if tipped over, but should always be kept upright.

Low Water Indicator: Mist output will gradually decrease as the tank nears empty, signaling it is time to refill.

Care Instructions

Unplug before any cleaning or maintenance. Store in a cool, dry place when not in use for extended periods.

CAUTION!
- Never operate the unit without water in the tank.
- Do not block the mist outlet or air intakes.
- Do not move the unit while it is operating or full of water.
- Keep out of reach of children and pets.
- Use only as directed in this manual.

Regulatory Information

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 © Honeywell International Inc. Honeywell and MISTMATE are trademarks of Honeywell International Inc. For support, visit www.honeywellpluggedin.com or contact customer service at 1-800-332-1110.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Unit not plugged in / Tank empty / Knob on OFF	Plug in unit. Fill tank with water. Turn knob to desired setting.
Low mist output	Mineral buildup / Low setting selected / High humidity in room	Clean unit per instructions. Turn knob to higher setting. Mist output decreases naturally when target humidity is reached.
Water leaking	Tank not seated properly / Overfilled tank / Damaged seal	Remove and re-seat tank firmly. Do not overfill. Inspect tank and base seals for damage.
Unusual noise	Mineral buildup on transducer / Unit on uneven surface	Clean unit thoroughly. Place on a flat, level surface.
Indicator light not on	No power / Faulty outlet / Internal issue	Check power cord connection. Try a different outlet. If problem persists, contact customer service.
White dust around unit	Minerals in water being dispersed into air	Use demineralization cartridge (if compatible) or distilled water. Clean room surfaces regularly.

Reset: Unplug the unit for 5 minutes, then plug back in to reset the electronics.

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