Honeywell Humidifier HH350E Manual

The Honeywell Humidifier HH350E is a cool mist humidifier designed for medium to large rooms up to 500 sq ft. It features a 1-gallon tank capacity, adjustable humidity control, a wicking filter system, a quiet operation mode, an auto-shutoff function when empty, a refill indicator light, and a demineralization cartridge option to reduce white dust. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 1-Gallon Water Tank, Wicking Filter, Humidistat Control Knob, Mist Output Nozzle, Quiet Operation Mode, Refill Indicator Light, Demineralization Cartridge Slot.

Installation & Setup

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

1. Remove the water tank: Lift by the handle and separate from base.
2. Install the wicking filter: Remove from packaging, soak in cool water for 15 minutes, then insert into filter frame in base.
3. Optional: Install demineralization cartridge into designated slot if using.
4. Fill the tank: Turn tank upside down, remove cap, fill with cool tap water up to MAX line. Replace cap securely.
5. Place tank back on base: Ensure it is seated properly and aligned.

WARNING! Use only cool tap water. Do not use hot water, additives, or essential oils. Place on a water-resistant surface.

First-Time Use

Power on the humidifier and configure initial settings.

1. Plug into a standard 120V AC outlet.
2. Turn the Humidistat Control Knob to the desired humidity level (e.g., 40-50% for comfort).
3. Adjust the Mist Output Nozzle to direct mist away from walls and furniture.
4. Select fan speed: Turn the knob to HIGH for maximum output or LOW for quiet operation.
5. Monitor the Refill Indicator Light; it will illuminate when the tank is empty.

CAUTION! Always unplug the unit before cleaning, refilling, or performing any maintenance.

Specifications

• Model: Honeywell HH350E Cool Mist Humidifier.
• Coverage: Up to 500 square feet (medium to large room).
• Tank Capacity: 1 gallon (3.8 liters).
• Run Time: Up to 24 hours on low setting.
• Output: Adjustable cool mist.
• Humidity Control: Manual humidistat dial.
• Filter Type: Replaceable wicking filter (Model HWF350).
• Noise Level: Quiet operation on low setting.
• Power Source: 120V AC, 60Hz.
• Dimensions: Approximately 13.8" H x 10.7" W x 10.2" D.
• Weight: 5.3 lbs (empty).

Controls and Operation

Main controls are located on the front of the unit.

Control Knob: Combined power and humidistat control. Turn clockwise to increase humidity setting and fan speed. The unit powers on when turned from OFF position.

Mist Output Nozzle: Rotate 360 degrees to direct mist flow.

Indicator Light: Blue light indicates unit is on. Red Refill Light illuminates when tank is empty.

Operation Modes: HIGH (maximum mist output), LOW (quiet, lower mist output).

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup. Clean every 1-2 weeks during use.

1. Unplug the unit.
2. Remove water tank and empty any remaining water.
3. Clean tank: Fill with a mixture of 1 teaspoon of white vinegar and 1 gallon of water. Swirl and let sit for 20 minutes. Scrub with a soft brush, rinse thoroughly.
4. Clean base: Wipe interior surfaces with a cloth dampened with the vinegar solution. Do not submerge the base in water.
5. Rinse all parts with clean water and air dry completely before reassembly.

Tip: Use distilled or demineralized water to significantly reduce cleaning frequency and white dust.

Filter Replacement

The wicking filter (Model HWF350) should be replaced every 1-2 months, or when discolored or clogged.

1. Unplug unit and remove water tank.
2. Lift out the old filter from the filter frame in the base.
3. Soak the new filter in cool water for 15 minutes before installation.
4. Insert the new filter into the frame, ensuring it is seated properly.
5. Reassemble the unit and run on high for a few minutes to prime the filter.

WARNING! Never operate the humidifier without a filter installed. This can cause over-humidification and damage the unit.

Demineralization Cartridge

Optional Demineralization Cartridge (Model HD100) reduces white dust caused by minerals in hard water.

1. Purchase the HD100 cartridge separately.
2. Insert cartridge into the dedicated slot inside the base, next to the filter.
3. Replace cartridge every 2-3 months, or as indicated by reduced performance or visible sediment.

Note: The cartridge is an accessory and may not be included with the base unit.

Safety Information

Read all instructions before use.

• Use only cool tap, distilled, or demineralized water.
• Do not block mist outlet or air intakes.
• Always place on a firm, flat, level surface.
• Keep out of reach of children.
• Do not operate in an enclosed space where moisture could create a slip/fall hazard.
• Unplug before moving, cleaning, or servicing.
• Do not attempt to repair the unit yourself; contact customer service.

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 trademarks of Honeywell International Inc. For support, visit www.honeywellpluggedin.com or contact 1-800-332-1110.

Troubleshooting

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

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