Product Overview
The WELOV Cool Mist Humidifier, model H500D, is designed to enhance air quality in your living spaces. Featuring BoostMist technology for rapid humidification, smart humidity monitoring, and a large 6L tank, it provides up to 90 hours of continuous operation. This humidifier is ideal for bedrooms, living rooms, offices, and nurseries, offering quiet operation and an eye-protecting night light.

Image: Front view of the WELOV Cool Mist Humidifier H500D in white, with water droplets and leaves indicating mist output.
Setup Guide
Follow these steps to set up your WELOV Cool Mist Humidifier for first-time use:
- Unpack: Carefully remove the humidifier from its packaging. Ensure all components, including the main unit, water tank, and power adapter, are present and undamaged.
- Placement: Place the humidifier on a flat, stable, and water-resistant surface at least 6 inches (15 cm) away from walls and furniture. Avoid placing it directly on carpet or near heat sources.
- Fill Water Tank:
- Remove the water tank from the base.
- Unscrew the tank cap at the bottom of the tank.
- Fill the tank with clean, cool tap water. Distilled or demineralized water is recommended to prevent mineral buildup and white dust.
- Securely replace the tank cap.
- Carefully place the filled water tank back onto the humidifier base.
- Connect Power: Plug the power adapter into the humidifier's power port, then plug the adapter into a standard electrical outlet. The unit will enter standby mode.

Image: A person refilling the water tank of the WELOV humidifier, demonstrating the large capacity that lasts for days.
Operating Instructions
The WELOV H500D Humidifier offers various modes and settings for optimal comfort.
Control Panel Overview

Image: Diagram illustrating the control panel buttons and their functions, including mist level, humidity setting, timers, BoostMist, night light, sleep mode, and power.
- Power On/Off: Press the power button to turn the humidifier on or off.
- Mist Level Adjustment: Cycle through 5 mist levels (60ml/h, 120ml/h, 180ml/h, 240ml/h, 300ml/h) to achieve desired output.
- Humidity Setting (Auto Mode): Set your desired humidity level between 30% RH and 95% RH. The humidifier will automatically adjust mist output and turn on/off to maintain this level. Each press increases the setting by 5%.
- BoostMist Technology: Activate BoostMist for a rapid increase in humidity, providing up to 550ml/h mist output. This mode runs for 30 minutes automatically.
- Timer Function: Set a timer for 1-12 hours for automatic turn-on (On Timer) or turn-off (Off Timer). Note that the on and off timers are controlled separately and cannot be used in combination.
- Night Light: Long press the night light button to adjust the brightness of the eye-protecting night light.
- Sleep Mode: Activate sleep mode to turn off all display lights within 3 seconds for undisturbed rest.
Key Features in Operation
- Smart Humidity Monitoring: The humidifier continuously monitors room humidity and adjusts its operation to maintain your set level, preventing over-humidification.
- Long Runtime: With a 6L (1.6 gallon) tank, the humidifier can operate for up to 90 hours, providing up to 10 nights of continuous mist without frequent refills.
- Wide Coverage: Designed for large rooms up to 753 sq. ft., ensuring effective humidification across significant areas.
- Quiet Operation: The ultrasonic technology ensures low noise levels, making it suitable for bedrooms and nurseries.
Video: An official product video demonstrating the WELOV H500D BoostMist Cool Mist Humidifier in operation, highlighting its features and mist output.
Maintenance
Regular cleaning and maintenance are crucial for the optimal performance and longevity of your humidifier.
- Daily Maintenance:
- Empty and rinse the water tank and base daily.
- Wipe down any surfaces with a clean, dry cloth.
- Weekly Cleaning:
- Unplug the humidifier and disassemble the water tank from the base.
- Pour out any remaining water from both the tank and the base.
- Cleaning the Water Tank: Fill the tank halfway with water and add 2 tablespoons of white vinegar. Shake gently and let it sit for 30 minutes. Rinse thoroughly with clean water.
- Cleaning the Base: Pour a small amount of white vinegar into the water basin and let it sit for 30 minutes. Use a soft brush or cloth to clean the ultrasonic atomizer and other components. Rinse the base thoroughly.
- Dustproof Sponge: Regularly check and clean the dustproof sponge located near the fan. This prevents dust or hair from being attracted to the heat dissipation part of the fan.
- Allow all parts to air dry completely before reassembling.
- Storage: If storing the humidifier for an extended period, ensure all parts are clean and dry. Store in a cool, dry place.
Video: An official product video demonstrating the proper steps to clean the WELOV H500D Humidifier, including tank and base cleaning.
Troubleshooting
If you encounter issues with your WELOV Humidifier, refer to the following common problems and solutions. For more detailed guidance, please consult the official Troubleshooting Guide PDF available online.
| Problem | Possible Cause | Solution |
|---|---|---|
| No Mist Output |
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| White Dust Around Humidifier |
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| Unusual Noise |
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For comprehensive troubleshooting, refer to the official Troubleshooting Guide (PDF).
Specifications
| Feature | Detail |
|---|---|
| Brand | WELOV |
| Model Name | H500D-W |
| Color | White |
| Special Features | Adjustable Humidity Control, Digital Display, Adjustable Night Light, 1-12hrs Timer |
| Filter Type | Filter Free |
| Operation Mode | Ultrasonic |
| Product Dimensions | 9.84"D x 5.12"W x 15.98"H |
| Item Weight | 2.35 Kilograms (5.17 pounds) |
| Room Type | Kids Room, Office, Bedroom, Living Room, Nursery |
| Included Components | Dustproof Sponge |
| Voltage | 32 Volts (DC) |
| Wattage | 35.2 watts |
| Control Method | Touch |
| Country of Origin | China |
| First Available Date | November 3, 2022 |
Warranty and Support
WELOV is committed to providing excellent customer service and product support.
- Warranty: The WELOV H500D Humidifier comes with a 24-month extended warranty (12+12 months).
- Money-Back Guarantee: Enjoy a 30-day money-back guarantee from the date of purchase.
- Customer Support:
- Quick Reply: Expect a quick reply to your inquiries within 24 hours.
- Lifetime Customer Support: WELOV offers lifetime customer support for your product.
- Contact Hotline: For direct assistance, please call +1 (866) 779 3866.
- Operating Hours: Monday - Friday, 9:00 AM - 5:00 PM PST.

Image: The WELOV brand logo, representing quality and customer care.