Honeywell Humidifier HM750 Manual

The Honeywell Humidifier HM750 is a high-capacity cool mist humidifier designed for large rooms up to 750 sq. ft. It features a 1.5-gallon tank, adjustable humidity control, three speed settings, a refill indicator, an easy-to-clean design, an antimicrobial filter, 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, Control Panel with Digital Display, Adjustable Humidistat, Three Fan Speeds (Low, Medium, High), Refill Indicator Light, Antimicrobial Filter, Easy-Fill Opening, and Carry Handle.

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 filter.
2. Install the filter: Remove filter from packaging and insert into the filter compartment as directed.
3. Fill the tank: Carry tank to water source, remove cap, fill with cool tap water, replace cap securely.
4. Place tank: Position tank onto base, ensuring it is seated properly.
5. Plug into a 120V AC electrical outlet.

WARNING! Use only cool tap water. Do not use hot water or additives. Ensure unit is on a level surface to prevent leakage.

First-Time Use

Power on the humidifier; the digital display will illuminate.

1. Set desired humidity: Press the HUMIDITY button to select a target level (30%-60% RH is recommended).
2. Select fan speed: Press the SPEED button to cycle through Low, Medium, and High settings.
3. Monitor display: The digital readout shows current room humidity.
4. Auto mode: The unit will run until target humidity is reached, then cycle on/off to maintain it.

CAUTION! Do not block air inlet or outlet. Keep unit at least 6 inches from walls and furniture.

Specifications

• Model: Honeywell HM750
• Coverage Area: Up to 750 sq. ft.
• Tank Capacity: 1.5 gallons (5.7 liters)
• Output: Up to 1.8 gallons per day (24 hours)
• Humidistat: Adjustable, 30% to 60% relative humidity
• Fan Speeds: 3 settings (Low, Medium, High)
• Filter: Antimicrobial wicking filter (Model HF-750)
• Power Source: 120V AC, 60Hz
• Power Consumption: 40W (max)
• Dimensions (HxWxD): 18.5" x 13.2" x 10.6"
• Weight (empty): 7.5 lbs

Controls and Settings

Control Panel located on top of unit. Buttons: POWER, SPEED, HUMIDITY, LIGHT (for display).

Display Icons: Current Humidity %, Target Humidity %, Fan Speed Indicator, Refill Alert, Filter Replacement Alert.

Humidity Control: Set target humidity between 30% and 60% in 5% increments. Fan Speed: Low for quiet operation, Medium for balanced output, High for maximum mist output. Display Light: Press LIGHT to dim or turn off display for nighttime use.

Operation Guide

Daily operation for optimal humidity.

1. Power On: Press POWER button; display lights up.
2. Set Target Humidity: Use HUMIDITY button to select desired level (40-50% is typical for comfort).
3. Select Speed: Choose fan speed based on room size and desired mist output.
4. Auto Operation: Unit runs until target humidity is met, then maintains it.
5. Refilling: When Refill Indicator lights, turn unit off, remove tank, refill with cool water, replace.
6. Night Mode: Press LIGHT to dim display for undisturbed sleep.

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

Maintenance & Cleaning

Regular cleaning prevents mold and mineral buildup.

1. Unplug the unit before any cleaning.
2. Empty and rinse the water tank daily.
3. Weekly cleaning: Use a soft cloth and mild detergent (if needed) to clean tank interior. Rinse thoroughly.
4. Base cleaning: Wipe base with damp cloth; do not immerse in water.
5. Disinfecting (monthly): Mix 1 teaspoon of white vinegar with 1 gallon of water, rinse tank, then rinse with clean water.
6. Dry all parts completely before reassembly.

WARNING! Never use harsh chemicals, abrasives, or submerge electrical parts. Always unplug before cleaning.

Filter Replacement

Replace filter every 1-2 months or as indicated by Filter Replacement Alert.

1. Turn off and unplug humidifier.
2. Remove water tank.
3. Open filter compartment door.
4. Remove old filter and dispose.
5. Insert new Honeywell HF-750 filter, ensuring proper orientation.
6. Close compartment door, replace tank, and plug in.
7. Reset filter indicator (if applicable) per manual instructions.

Note: Using non-Honeywell filters may affect performance and void warranty.

Care & Storage

When not in use for extended periods:

1. Unplug unit.
2. Empty and thoroughly clean tank and base (see Cleaning section).
3. Remove and discard old filter.
4. Allow all parts to air dry completely.
5. Reassemble without filter.
6. Store in original box or cover in a cool, dry place.

CAUTION! Never store with water in tank. Ensure unit is completely dry to prevent mold growth.

Regulatory Information

FCC Compliance: This device complies with Part 15 of the FCC Rules. Copyright © Honeywell International Inc. Honeywell and HM750 are trademarks of Honeywell. For support, visit www.honeywellhumidifiers.com or contact 1-800-332-1110.

Troubleshooting

Reset: Unplug for 60 seconds, then plug back in to reset electronic controls.

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