Introduction
Thank you for purchasing the Honeywell Kaz Health Mist Quiet Operation Cool Mist Humidifier, Model 4100. This humidifier is designed to provide a comfortable and healthy indoor environment by adding essential moisture to the air. It features new technology to create a superfine mist and includes an exclusive Kaz dyna filter for air cleaning, removing dust, pollen, odors, and tobacco smoke. Its quiet operation ensures minimal disturbance. Please read this manual thoroughly before operating your humidifier to ensure safe and optimal performance.
Important Safety Instructions
When using electrical appliances, basic precautions should always be followed to reduce the risk of fire, electric shock, and injury to persons, including the following:
- Read all instructions before using the humidifier.
- Always place the humidifier on a firm, flat, level surface. A waterproof mat or pad is recommended under the humidifier.
- Do not place the humidifier directly on carpet, finished floors, or near furniture that can be damaged by water or moisture.
- Do not operate the humidifier without water in the tank.
- Do not immerse the humidifier in water or other liquids.
- Do not use attachments not recommended by the manufacturer.
- Unplug the humidifier from the power outlet when not in use, when filling, emptying, or cleaning.
- Keep the humidifier out of reach of children and pets.
- Do not block air openings or place the humidifier on a soft surface, such as a bed or sofa, where the air openings may be blocked.
- Do not operate if the cord or plug is damaged, or if the unit malfunctions or has been dropped or damaged in any manner.
- Use only clean, cool tap water. If you have extremely hard water, use distilled water.
Parts Identification

Figure 1: Honeywell Kaz Health Mist Cool Mist Humidifier, Model 4100. This image shows the humidifier from an elevated perspective, highlighting its compact design with a light grey top section featuring a mist outlet and a wider, translucent white base.
The Honeywell Kaz Health Mist Humidifier Model 4100 consists of several key components:
- Mist Outlet: Located on the top grey section, where the cool mist is dispersed into the room.
- Water Tank/Base: The translucent white lower section that holds the water. Features a water fill channel for easy filling.
- Kaz Dyna Filter: An internal component responsible for air cleaning, removing dust, pollen, odors, and tobacco smoke. (Not visible externally in the provided image, but included as per product features).
- Power Cord: For connecting the unit to an electrical outlet.
Setup
- Unpack: Carefully remove the humidifier from its packaging. Retain packaging for future storage.
- Placement: Place the humidifier on a firm, level, water-resistant surface at least 6 inches (15 cm) away from walls and furniture. Ensure the mist outlet is not directed at walls or furniture.
- Fill Water Tank: The humidifier features a water fill channel for easy filling without removing the cover. Fill the water tank with cool, clean tap water. Do not overfill. If you have hard water, using distilled water is recommended to prevent mineral buildup.
- Insert Filter: Ensure the Kaz dyna filter is properly installed according to the instructions provided with the filter.
- Connect Power: Plug the power cord into a standard electrical outlet.
Operating Instructions
- Power On: Once filled and plugged in, the humidifier is ready for operation. Refer to the unit's control knob or button for activation.
- Adjust Mist Output: If applicable, adjust the mist output level to your desired comfort. The humidifier operates quietly, making it suitable for bedrooms and living rooms.
- Monitor Water Level: The unit will stop producing mist when the water tank is empty. Refill as needed.
- Power Off: To turn off the humidifier, use the control knob or button. Unplug the unit from the wall outlet when not in use for extended periods.
Maintenance
Regular cleaning and maintenance are essential for the efficient operation and longevity of your humidifier.
Daily Maintenance:
- Empty the water tank and base.
- Rinse the tank and base thoroughly with cool water.
- Wipe all surfaces dry.
Weekly Maintenance (Mineral Deposit Removal):
- Unplug the unit.
- Remove the water tank and any filters.
- Pour 2 cups of undiluted white vinegar into the water tank and base. Let stand for 20 minutes.
- Clean all interior surfaces with a soft brush or cloth to remove mineral deposits.
- Rinse the tank and base thoroughly with clean water until the smell of vinegar is gone.
Filter Replacement:
The Kaz dyna filter should be replaced regularly, typically every 1-3 months, depending on water hardness and usage. Refer to the filter packaging for specific replacement intervals. A clogged filter can reduce mist output and air cleaning efficiency.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist output |
|
|
| White dust around humidifier | Hard water mineral deposits. | Use distilled water. Clean unit regularly to remove mineral buildup. |
| Unusual odor | Stagnant water or dirty tank. | Clean the humidifier thoroughly. Change water daily. |
| Leaking or excessive condensation |
|
|
Specifications
| Brand | Honeywell |
| Model Name | Honeywell Kaz Health Mist Quiet Operation Cool Mist Humidifier, 4100 |
| Model Number | 4100 |
| Special Feature | Quiet |
| Filter Type | Carbon (Kaz dyna filter) |
| Operation Mode | Manual |
| Item Weight | 3.1 Pounds |
| Product Dimensions | 7.2 x 13 x 11.2 inches |
| Wattage | 60 watts |
| Included Components | Kaz dyna filter |
| UPC | 028785201054 |
Warranty and Support
This Honeywell humidifier comes with a 1 year limited warranty. For detailed warranty information and terms, please refer to the warranty card included with your product or visit the official Honeywell website.
For customer support, replacement parts, or further assistance, please contact Honeywell customer service. You can also visit the official Honeywell store online for more product information and resources: Honeywell Store.







