1. Introduction
Thank you for choosing the EVO WMH440 Self Sanitizing Pure Mist Humidifier. This device is designed to provide a continuous supply of clean, humidified air using a patented wicking vapor system. It features a digital monitoring system for humidity levels, a 6-liter water tank for extended operation, and a user-friendly design for ease of use. Please read this manual thoroughly before operating your humidifier to ensure safe and optimal performance.

Image 1.1: EVO WMH440 Humidifier Front View
2. Important Safety Information
To reduce the risk of fire, electric shock, or injury, always follow basic safety precautions when using electrical appliances. This includes, but is not limited to, the following:
- Read all instructions before using the humidifier.
- Keep the humidifier out of reach of children and pets.
- Always place the humidifier on a firm, flat, water-resistant surface at least 6 inches (15 cm) away from walls and appliances.
- Unplug the humidifier from the power outlet before filling, cleaning, or performing any maintenance.
- Do not immerse the humidifier base in water or other liquids.
- Use only clean, cool tap water or distilled water. Distilled water is recommended to minimize mineral buildup.
- Do not block air vents or mist outlet.
- If the humidifier is damaged, do not operate it. Contact customer support.
- The humidifier features an automatic shut-off function to prevent overheating and ensure safety when the water tank is empty.
3. Product Components
The EVO WMH440 Humidifier consists of the following main parts:
- Mist Outlet: Where humidified air is released.
- Digital Display Panel: Shows humidity levels and settings.
- Control Buttons: For power, mist level, and sanitization.
- Water Tank: 6-liter capacity for water storage.
- Base Unit: Contains the heating element and electronic components.
- Wicking Filter: Fabric filter that wraps around the heating element.

Image 3.1: Internal Components and Sanitization Process Diagram
4. Setup Instructions
4.1 Unpacking
- Carefully remove the humidifier from its packaging.
- Remove all packing materials and ensure all components are present.
4.2 Placement
- Place the humidifier on a flat, stable, and water-resistant surface.
- Ensure there is at least 6 inches (15 cm) of space around the humidifier for proper airflow.
- Avoid placing the humidifier directly on carpet or near heat sources, direct sunlight, or electronic devices.
4.3 Filling the Water Tank
- Ensure the humidifier is unplugged from the power outlet.
- Remove the top cover to access the water tank opening.
- Fill the water tank directly from the top with clean, cool tap water or distilled water. Do not exceed the maximum fill line.
- Replace the top cover securely.

Image 4.1: Top-Fill Water Tank for Easy Refilling
4.4 Power Connection
- Plug the power cord into a standard 120V AC electrical outlet.
5. Operating Instructions
5.1 Power On/Off
- Press the Power Button (
) to turn the humidifier on or off. The digital display will illuminate.
5.2 Digital Display and Humidity Monitoring
- The digital display shows the current humidity level in your room.
- Use the + and - buttons to adjust the desired humidity level. The humidifier will automatically work to maintain this level.

Image 5.1: Digital Display for Humidity Monitoring
5.3 Mist Output Settings
- Press the Mist Level Button (
) to cycle through different mist output levels (e.g., Low, Medium, High). - The 6-liter tank capacity allows for up to 26 hours of continuous operation on the low setting.

Image 5.2: Extended Run Time Operation
5.4 Self-Sanitizing Function
- The humidifier features a unique self-sanitizing technology that automatically sterilizes the tank with bursts of high heat steam.
- To activate, press the Sanitize Button (
). A red light on the display will indicate the sanitization process is active. - This process typically takes approximately 20 minutes.

Image 5.3: Self-Sanitizing Technology in Action
5.5 Auto Shut-Off
- The humidifier will automatically turn off when the water tank is empty to prevent damage and ensure safety.
6. Maintenance
Regular cleaning and maintenance are essential for the efficient operation and longevity of your humidifier.
6.1 Daily Maintenance
- Empty and rinse the water tank daily.
- Wipe down the mist outlet and exterior surfaces with a clean, damp cloth.
6.2 Weekly Cleaning
- Base Unit: The humidifier base is dishwasher safe for convenient cleaning. Ensure it is completely dry before reassembly.
- Water Tank: Clean the inside of the water tank with a soft brush or sponge. For mineral buildup, use a solution of white vinegar and water (1:1 ratio), let it soak for 30 minutes, then rinse thoroughly.
- Wicking Filter: Inspect the wicking filter. If it shows significant mineral buildup or wear, it may need replacement.
6.3 Filter Replacement
- The wicking filter is a fabric wrap with hook and loop (Velcro) that surrounds the heating element.
- A 'Change Filter' light on the display will indicate when the filter needs replacement. Filter life can vary based on water hardness and usage.
- To replace, unplug the unit, remove the old filter, and carefully wrap a new EVO filter around the heating element, securing it with the hook and loop fasteners.
- Using distilled or soft water can extend filter life and prevent mineral buildup.
6.4 Storage
- Before storing, ensure the humidifier is clean and completely dry.
- Store in a cool, dry place away from direct sunlight.
7. Troubleshooting
If you experience issues with your EVO WMH440 Humidifier, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No mist or low mist output |
|
|
| Humidifier not turning on |
|
|
| "CF" error code displayed |
|
|
| Ceramic heating element cracked/crumbled |
|
|
| Filter welded to heating element |
|
|
If the problem persists after attempting these solutions, please contact EVO customer support for further assistance.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | EVO |
| Model Name | EVO Self Sanitizing Pure Mist Humidifier |
| Model Number | WMH440 |
| Operation Mode | Evaporative |
| Water Tank Capacity | 6 Liters |
| Continuous Run Time | Up to 26 hours (on low setting) |
| Product Dimensions | 11.3"D x 11.3"W x 15.4"H |
| Item Weight | 6.61 Pounds |
| Color | White |
| Special Feature | Digital Display, Self-Sanitizing Technology, Dishwasher Safe Base, Auto Shut-Off |
| Room Type | Bedroom, Living Room, Office |
| Voltage | 120 Volts |
| Wattage | 3.1 Watts |
| UPC | 860011378167 |
9. Warranty and Customer Support
For warranty information, product support, or to purchase replacement parts and filters, please contact EVO customer service. Refer to the product packaging or the official EVO website for the most current contact details.
When contacting support, please have your model number (WMH440) and purchase date available.





