Honeywell Humidifier HUL535BC Manual

The Honeywell HUL535BC is a cool mist humidifier designed for medium to large rooms up to 500 sq. ft. It features a 1.5-gallon tank, adjustable humidity control, a wicking filter, a quiet fan, an easy-to-fill tank, an auto-shutoff function, and an essential oil tray. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 1.5-Gallon Water Tank, Humidistat Control Dial, Wicking Filter, Quiet Mist Fan, Essential Oil Tray, Tank Handle, Power Cord, and Base Unit.

Installation & Setup

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

1. Remove the water tank from the base unit.
2. Remove the wicking filter from its packaging and install it into the filter frame in the base.
3. Fill the tank with clean, cool tap water. Do not use hot water or additives unless specified.
4. Place the tank back onto the base, ensuring it is seated properly.
5. Plug the power cord into a standard 120V AC outlet.

WARNING! Place on a waterproof surface. Keep cord away from heated surfaces. Do not immerse unit in water.

First-Time Use

Power on the humidifier and set your desired humidity level.

1. Ensure the tank is filled and properly seated on the base.
2. Plug in the unit. The power indicator light will illuminate.
3. Turn the humidistat control dial to your desired setting (Low to High).
4. Adjust the 360° mist nozzle to direct mist away from walls and furniture.
5. For scented mist, add a few drops of essential oil to the dedicated tray.

CAUTION! Use only clean, cool water. Never operate without the filter installed. Ensure the unit is on a flat surface.

Specifications

• Model: HUL535BC
• Tank Capacity: 1.5 Gallons (5.7 Liters)
• Room Coverage: Up to 500 sq. ft.
• Run Time: Up to 24 hours on low setting
• Humidistat: Adjustable dial control
• Filter Type: Demineralization/Wicking Filter (Replace every 1-2 months)
• Mist Output: Adjustable, cool mist
• Noise Level: Quiet operation
• Power Source: 120V AC, 60Hz
• Dimensions (approx.): 13.8" H x 10.9" W x 10.9" D
• Weight: 7.5 lbs (empty)

Controls and Settings

Primary control is the Humidistat Dial on the front of the unit.

Humidistat Dial: Turn clockwise to increase mist output (HIGH) and counter-clockwise to decrease (LOW). Setting it to the minimum position turns the fan off.

360° Mist Nozzle: Manually rotate to direct mist flow.

Essential Oil Tray: Slide out, add a few drops of oil, and slide back in. Do not add oil directly to the water tank.

Power Indicator Light: Blue LED illuminates when unit is plugged in and operational.

Operation Guide

For daily operation, maintain proper water level and humidity settings.

1. Check water level daily. Refill when tank is empty or low.
2. Adjust the humidistat based on room conditions and comfort.
3. Use the essential oil tray sparingly; excessive oil can clog the unit.
4. If not using for extended periods, empty the tank and base, clean thoroughly, and store dry.

Tip: For best performance, use in a room with doors closed. Ideal humidity level is between 40% and 60%.

Maintenance & Cleaning

Regular cleaning prevents mold, mineral buildup, and ensures efficient operation.

1. Daily: Refill with fresh water. Wipe exterior with a damp cloth.
2. Weekly: Empty any remaining water. Clean the tank and base with a mixture of white vinegar and water (1:1 ratio) to descale. Rinse thoroughly.
3. Monthly: Replace the wicking filter (see Filter Replacement section).
4. Always unplug the unit before cleaning. Never immerse the base unit in water.

WARNING! Do not use harsh chemicals, abrasives, or detergents. Do not allow water to enter the motor or electrical parts.

Filter Replacement

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

1. Unplug the humidifier and remove the water tank.
2. Remove the old filter from the filter frame in the base.
3. Insert the new filter (Honeywell part #HRF-10 or equivalent). Ensure it is seated flat.
4. Reassemble the tank and base. Soak the new filter for 15-20 minutes before first use for optimal performance.

Note: Using the humidifier without a filter or with an old filter can reduce performance and promote microbial growth.

Safety Information

Read all instructions before use to prevent injury or damage.

• Use only with 120V AC outlet.
• Do not operate in an enclosed space where flammable gases or vapors are present.
• Keep out of reach of children and pets.
• Do not block mist outlet or air intakes.
• Always use the auto-shutoff feature as a backup; do not let the unit run dry.
• If the power cord is damaged, it must be replaced by the manufacturer or authorized service center.

CAUTION! To reduce the risk of fire or electric shock, do not disassemble or attempt to repair the unit yourself.

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 the Honeywell logo are registered trademarks of Honeywell International Inc. For support, visit www.honeywellhome.com or contact 1-800-332-1110.

Troubleshooting

Reset: Unplug unit for 5 minutes, then plug back in.

Service: For repairs, contact Honeywell Customer Service at 1-800-332-1110 or visit www.honeywellhome.com.