Honeywell Humidifier HUL535WC Manual

The Honeywell HUL535WC is a 1.5-gallon cool mist humidifier designed for medium to large rooms up to 400 sq. ft. It features a wicking filter system, adjustable humidity control, a refill indicator light, a quiet operation mode, an easy-to-clean tank, and an auto-shutoff function when empty. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 1.5-gallon water tank, wicking filter, adjustable humidity dial, refill indicator light, quiet operation mode, easy-fill tank design, and auto-shutoff.

Installation & Setup

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

1. Remove all packaging materials from the humidifier and tank.
2. Place the humidifier on a waterproof mat or towel to protect surfaces.
3. Ensure the unit is at least 6 inches away from walls and furniture for proper airflow.
4. Install the wicking filter as described in the filter section.
5. Fill the tank with clean, cool water and place it back on the base.
6. Plug the power cord into a standard 120V outlet.

WARNING! Do not place on carpets or uneven surfaces. Keep out of reach of children and pets.

First-Time Use

Before first use, clean the tank and base as described in the cleaning section.

1. Install a new wicking filter: Remove from package, soak in cool water for 15 minutes, then insert into filter frame.
2. Fill the tank with cool, clean water. Do not use hot water or additives.
3. Place the tank securely on the base, ensuring it is properly seated.
4. Plug in the unit. The refill light may illuminate if the tank is not full.
5. Turn the humidity control dial to the desired setting (Low to High).
6. Mist will begin to emit from the top grille within a few minutes.

CAUTION! Always use clean, cool water. Never operate without the filter installed.

Specifications

• Model: HUL535WC
• Tank Capacity: 1.5 gallons (5.7 liters)
• Coverage Area: Up to 400 sq. ft.
• Output: Up to 1.2 gallons per day (24-hour runtime on low)
• Humidistat: Adjustable dial control
• Filter Type: Demineralization wicking filter (replacement part #HUL535FILTER)
• Noise Level: Quiet operation, suitable for bedrooms
• Power: 120V AC, 60Hz, 26W
• Dimensions: 13.8" H x 10.4" W x 10.4" D
• Weight: 6.2 lbs (empty)

Controls and Settings

Front Panel: Power indicator light, Refill indicator light, Humidity control dial.

Humidity Control Dial: Turn clockwise to increase mist output (HIGH) and counterclockwise to decrease (LOW). Adjust based on room size and dryness.

Indicator Lights: Power light (blue) indicates unit is on. Refill light (red) illuminates when the water tank is low or empty.

Auto Shut-Off: The unit will automatically turn off when the tank is empty to protect the motor.

Operation Guide

For daily operation, ensure the tank is filled and the filter is properly installed.

1. Check the water level daily. Refill when the red indicator light turns on.
2. Adjust the humidity control dial to maintain a comfortable room humidity (typically 40-60%).
3. For quiet nighttime operation, set the dial to the LOW setting.
4. If the unit stops misting, check the water level and refill if necessary.
5. To turn off, simply unplug the unit from the electrical outlet.

Tip: Use distilled or demineralized water to reduce white dust and extend filter life.

Maintenance & Cleaning

Regular cleaning prevents mold, mineral buildup, and ensures optimal performance.

1. Daily: Refill with fresh, cool water.
2. Weekly: Clean the tank and base with a mixture of mild soap and water. Rinse thoroughly.
3. Bi-Weekly (or as needed): Deep clean with a solution of 1 teaspoon of white vinegar and 1 gallon of water. Let sit for 20 minutes, then scrub and rinse.
4. Dry all parts completely before reassembling and storing.

WARNING! Never use harsh chemicals, abrasives, or detergents. Always unplug before cleaning.

Filter Replacement

The wicking filter should be replaced every 1-2 months, or more often if using hard water.

1. Unplug the humidifier and remove the water tank.
2. Remove the old filter from the filter frame.
3. Soak the new filter (HUL535FILTER) in cool water for 15 minutes.
4. Insert the damp filter into the frame, ensuring it is fully seated.
5. Reassemble the unit, fill with water, and resume operation.

Note: A clogged or old filter reduces mist output and efficiency.

Safety Information

Read all instructions before use to prevent injury or damage.

• Use only 120V AC power source.
• Do not operate without water in the tank.
• Do not block mist outlet or air intakes.
• Keep cord away from heated surfaces.
• Do not immerse the base, cord, or plug in water.
• This appliance is not intended for use by persons with reduced capabilities.
• Always place on a stable, level, and waterproof surface.

CAUTION! To reduce the risk of fire or electric shock, do not disassemble the unit. Refer servicing to qualified personnel.

Regulatory Information

This humidifier complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. This product is ETL listed. Copyright © Honeywell International Inc. Honeywell and the Honeywell logo are registered trademarks. For support, visit www.honeywellpluggedin.com or contact 1-800-332-1110.

Troubleshooting

Reset: Unplug the unit for 10 minutes, then restart.

Service: For warranty or service, contact Honeywell Customer Support at 1-800-332-1110 or visit the website.