Honeywell Humidifier HDH-125 Manual

The Honeywell Humidifier HDH-125 is a cool mist humidifier designed to add moisture to dry indoor air, helping to relieve dry skin, nasal congestion, and static electricity. It features a 1-gallon tank capacity, adjustable humidity control, a wicking filter, an auto-shutoff function, and a quiet operation mode. Below are key sections for safety, features, installation, 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. Filter Replacement 8. Safety Features 9. Care & Storage 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Water tank, base unit with motor and fan, wicking filter, control panel, and adjustable mist output nozzle.

Feature	Description
1-Gallon Tank Capacity	Provides up to 24 hours of operation on low setting
Adjustable Humidity Control	Dial to set desired humidity level
Wicking Filter	Traps minerals and impurities from water
Auto Shut-Off	Turns off when tank is empty or removed
Quiet Operation	Designed for bedroom or office use
Adjustable Mist Output	Control knob to adjust mist intensity
Easy-Fill Tank	Wide opening for convenient refilling
Filter Change Indicator	Light alerts when filter needs replacement
Carry Handle	Integrated handle for easy transport
Power Cord Storage	Compartment to wrap excess cord

Installation & Setup

Unpack and inspect all components. Place on a flat, stable, water-resistant surface.

Remove tank: Lift tank from base unit.
Install filter: Insert wicking filter into base, ensuring proper alignment.
Fill tank: Turn tank upside down, remove cap, fill with cool tap water (do not use hot water).
Reassemble: Place tank back on base, ensuring it seats firmly.
Plug in: Connect power cord to outlet.

WARNING! Place humidifier on a level surface away from direct sunlight and heat sources. Keep out of reach of children.

First-Time Use

Power on humidifier; set desired humidity level.

Initial setup: Ensure filter is installed and tank is filled.
Power on: Turn control knob to desired mist setting (Low/Med/High).
Set humidity: Adjust humidity control dial to comfort level (30-60% RH recommended).
Monitor operation: Check that mist is emitting from nozzle.
Auto mode: Unit will maintain set humidity level automatically.

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

Specifications

Model: HDH-125
Tank Capacity: 1 gallon (3.8 liters)
Coverage Area: Up to 250 square feet
Run Time: Up to 24 hours (low setting)
Humidity Output: Adjustable up to 0.5 gallons per day
Noise Level: Less than 35 dB on low setting
Power Consumption: 25W maximum
Power Source: 120V AC, 60Hz
Dimensions: 12.5" H x 10.5" W x 8.5" D
Weight: 5.5 lbs (empty)

Controls and Operation

Control Panel: Power/Mist Control Knob, Humidity Control Dial, Filter Indicator Light.

Operation: Turn knob clockwise to increase mist output (Low → Med → High). Adjust humidity dial to set target relative humidity. Filter light illuminates when replacement is needed.

Settings: Mist output (3 levels), Humidity control (dial adjustable), Auto shut-off (activates when empty), Quiet mode (low setting).

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup.

Unplug unit before cleaning.
Empty tank daily and rinse with clean water.
Clean base weekly: Remove tank, wipe interior with soft cloth and mild detergent.
Disinfect monthly: Use white vinegar solution (1 cup vinegar to 1 gallon water).
Rinse thoroughly and air dry completely before reassembly.

Tip: Always use clean, cool tap water. Distilled water reduces mineral deposits.

Filter Replacement

Replace wicking filter every 1-3 months depending on water hardness and usage.

Turn off and unplug humidifier.
Remove water tank from base.
Remove old filter from base compartment.
Insert new filter, ensuring proper orientation.
Reset filter indicator by pressing and holding the filter button for 3 seconds (if equipped).
Reassemble and refill tank.

WARNING! Do not operate without filter. Using unfiltered water may cause white dust and reduce performance.

Safety Features

Auto Shut-Off: Activates when tank is empty or improperly seated. Tip-Over Protection: Unit shuts off if knocked over. Overheat Protection: Thermal cutoff prevents motor damage.

Care & Storage

When not in use for extended periods:

Unplug and empty all water from tank and base.
Clean and disinfect thoroughly.
Allow all parts to dry completely.
Remove and discard old filter.
Store in original box in cool, dry place.

CAUTION! Never store with water in tank. Always dry completely to prevent mold growth.

Regulatory Information

UL Listed: Meets safety standards for household humidifiers. FCC Part 15: Class B digital device compliant. Copyright © Honeywell International Inc. For support, visit www.honeywellhumidifiers.com or contact 1-800-332-1110.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No mist output	Empty tank/incorrect assembly	Refill tank; ensure tank is properly seated on base.
Low mist output	Clogged filter/mineral buildup	Replace filter; clean nozzle and base.
White dust in room	Hard water/mineral deposits	Use distilled water; replace filter regularly.
Unit not turning on	No power/auto shut-off active	Check power outlet; ensure tank has water and is properly seated.
Unusual noise	Mineral buildup/fan obstruction	Clean base and fan; ensure unit is on level surface.
Water leakage	Overfilled/cracked tank	Do not exceed fill line; inspect tank for damage.
Filter light on	Filter needs replacement	Replace wicking filter.

Reset: Unplug for 30 seconds, then restart.

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