Honeywell Humidifier HCM305T Manual

The Honeywell HCM305T is a 1.5-gallon ultrasonic cool mist humidifier designed for medium to large rooms up to 500 sq ft. It features a 1.5-gallon transparent tank, ultrasonic technology for quiet operation, a 360-degree mist nozzle, adjustable humidity control, an auto shut-off function when empty, a night light, and an easy-to-clean design. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 1.5-gallon transparent water tank, ultrasonic mist generator, 360-degree adjustable mist nozzle, control panel with dial, night light, and filter-free design.

Installation & Setup

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

1. Remove all packaging materials from the humidifier and water tank.
2. Place the humidifier base on a flat, level surface at least 12 inches away from walls and furniture.
3. Ensure the unit is placed on a water-resistant surface to prevent moisture damage.
4. Plug the power cord into a standard 120V AC electrical outlet.

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

First-Time Use

Before first use, clean the water tank and base according to cleaning instructions.

1. Fill the water tank with clean, cool tap water. Do not use hot water.
2. Place the filled tank onto the base, ensuring it is seated properly.
3. Turn the mist control dial to the desired setting (Low, Medium, High).
4. The night light can be turned on/off using the night light button.
5. The humidifier will begin producing mist immediately.

CAUTION! Use only clean, cool water. Do not add essential oils or other additives.

Specifications

• Model: HCM305T
• Tank Capacity: 1.5 gallons (5.7 liters)
• Room Coverage: Up to 500 sq ft
• Mist Output: Adjustable up to 24 hours of continuous operation on low setting
• Technology: Ultrasonic cool mist
• Power Consumption: 30W
• Power Requirements: 120V AC, 60Hz
• Dimensions (LxWxH): 11.8 x 7.9 x 13.4 inches
• Weight (Empty): 4.2 lbs
• Warranty: 1-year limited warranty

Controls and Operation

Control Panel: Mist Control Dial, Night Light Button, Power Indicator Light.

Mist Control Dial: Rotate clockwise to increase mist output (Low → Medium → High). Rotate counterclockwise to decrease output or turn off.

Night Light: Press the night light button to turn the soft blue illumination on or off.

360-Degree Nozzle: Manually rotate the nozzle to direct mist where needed.

Auto Shut-Off: The unit will automatically power off when the water tank is empty. The power indicator light will turn off.

Filling the Water Tank

Always turn off and unplug the humidifier before filling.

1. Lift the water tank off the base by the handle.
2. Carry the tank to a sink and remove the tank cap.
3. Fill with clean, cool tap water up to the maximum fill line. Do not overfill.
4. Replace the tank cap securely and wipe any excess water from the exterior.
5. Place the tank back onto the base, ensuring it is properly seated.
6. Plug in the unit and adjust the mist control as desired.

Tip: Use distilled or demineralized water to minimize white dust if you have hard water.

Cleaning & Maintenance

Regular cleaning prevents mold, bacteria, and mineral buildup.

Daily: Empty and rinse the tank if not in use for more than 24 hours.

Weekly Cleaning:

1. Unplug the humidifier. Remove the water tank and empty any remaining water.
2. Clean the tank with a mixture of mild dish soap and warm water. Use a soft brush if needed.
3. Rinse thoroughly with clean water to remove all soap residue.
4. Wipe the base and mist nozzle with a soft, damp cloth. Do not immerse the base in water.
5. Allow all parts to air dry completely before reassembling.

Descaling (Monthly or as needed): Use a mixture of 1 cup white vinegar and 1 gallon water. Let solution sit in tank for 20 minutes, then scrub and rinse thoroughly.

Safety Features

Auto Shut-Off: Activates when water tank is empty to prevent damage. Tip-Over Protection: Unit is designed to minimize leakage if tipped. Overheat Protection: Built-in thermal protection.

Care & Storage

When not in use for extended periods:

1. Unplug the unit and empty all water from the tank and base.
2. Clean thoroughly as described in the cleaning section.
3. Allow all parts to dry completely.
4. Store in original packaging or a clean, dry place.

CAUTION! Never store with water in the tank. Always clean before storage to prevent mold.

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. For support, visit www.honeywellhumidifiers.com or contact 1-800-332-1110.

Troubleshooting

Reset: Unplug for 30 seconds, then plug back in.

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