1. Important Safety Instructions
Please read all instructions carefully before operating the dehumidifier and retain this manual for future reference. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure the dehumidifier is placed on a stable, level surface.
- Allow the unit to stand upright for at least 24 hours after transport before plugging it in to ensure optimal performance and prevent compressor damage.
- Do not operate the unit with a damaged cord or plug. If the power cord is damaged, it must be replaced by the manufacturer, its service agent, or similarly qualified persons to avoid a hazard.
- Do not block the air inlet or outlet. Maintain at least 20 cm (8 inches) clearance around the unit for proper airflow.
- Do not insert fingers or foreign objects into the air inlets or outlets.
- Unplug the dehumidifier before cleaning, performing maintenance, or when not in use for extended periods.
- This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Do not use the appliance in areas where flammable liquids or gases are stored.
2. Product Overview
The STUBDL 12L/Day Dehumidifier is designed to efficiently remove excess moisture from your indoor environment, improving air quality and comfort. It features an automatic humidity sensor, 24-hour timer, and options for continuous drainage.

Figure 1: Front view of the STUBDL 12L/Day Dehumidifier, showing its sleek design and a continuous drainage hose.

Figure 2: The dehumidifier operating in a room, illustrating its 12L/day moisture removal capacity and the importance of a 24-hour settling period before first use.
Key Features:
- High Efficiency: Removes up to 12 liters of water per day (at 86°F, 80%RH).
- Smart Humidity Control: Features CO (Continuous Operation) and AU (Automatic) modes with a target humidity range of 30% to 90%.
- 24-Hour Timer: Customize operation time to save energy.
- Automatic Defrost: Activates when temperatures drop below 0°C to prevent ice buildup.
- Dual Drainage Options: Removable 2.5L water tank with auto shut-off, or continuous drainage via hose.
- Digital Display & Indicators: Real-time ambient humidity display with color-coded lights (Red >70%, Green 50%~70%, Blue <50%).
- Ultra-Quiet Operation: Operates at less than 35 dB, suitable for bedrooms and offices.
- Portable Design: Equipped with 360° rotating wheels and a built-in handle for easy movement.
- Washable Filter: Detachable and washable air filter for easy maintenance.
3. Setup
Unpacking and Placement:
- Carefully remove the dehumidifier from its packaging.
- Place the unit upright on a firm, level surface in the desired location.
- Important: Allow the dehumidifier to stand upright for at least 24 hours before plugging it into a power outlet. This allows the refrigerant to settle, ensuring proper operation and longevity of the compressor.
- Ensure there is at least 20 cm (8 inches) of clear space around all sides of the unit for adequate airflow. Do not place it against walls or furniture that could obstruct the air inlets or outlets.
Power Connection:
- After the 24-hour settling period, insert the power plug firmly into a grounded electrical outlet.
- Ensure the voltage matches the rating label on the back of the unit.
4. Operating Instructions
Control Panel Overview:

Figure 3: Detailed view of the intelligent control panel, showing buttons for humidity setting, timer, speed, and power, along with the digital display and humidity indicator lights.
- Power Button (⏻): Turns the unit on or off.
- Humidity Setting Button (⚙): Adjusts the target humidity level in CO mode.
- Timer Button (⏱): Sets the 24-hour on/off timer.
- Speed Button (⚡): Selects between two fan speeds (Low/High).
- Digital Display: Shows current ambient humidity or timer settings.
- Humidity Indicator Lights:
- Red: Humidity > 70%
- Green: Humidity 50% ~ 70%
- Blue: Humidity < 50%
- Defrost Indicator: Illuminates when the automatic defrost function is active.
- Tank Full Indicator: Illuminates when the water tank is full, and the unit automatically shuts off.
Operating Modes:
- Power On/Off: Press the Power button (⏻) to turn the dehumidifier on or off.
- CO Mode (Continuous Operation/Target Humidity):
- Press the Humidity Setting button (⚙) to enter CO mode.
- Use the Humidity Setting button to adjust the desired humidity level between 30% and 90% in 5% increments. The unit will operate until the set humidity is reached, then cycle on/off to maintain it.
- AU Mode (Automatic Operation):
- The unit can automatically sense ambient temperature and humidity to adjust its operation, aiming to maintain an ideal humidity range. This mode is typically engaged by default or by cycling through the humidity settings.
- Timer Function:
- Press the Timer button (⏱) to set a 24-hour timer for automatic power on or off.
- While the unit is running, set a timer for it to turn off. While the unit is off, set a timer for it to turn on.
- Fan Speed:
- Press the Speed button (⚡) to toggle between Low and High fan speeds, depending on your dehumidification needs.
Defrost Function:
The dehumidifier is equipped with an automatic defrost function. If the ambient temperature drops below 0°C (32°F), the defrost indicator light will illuminate, and the unit will automatically enter defrost mode to melt any ice buildup on the coils. This is a normal operation and ensures efficient performance in colder conditions.
5. Drainage Options
The STUBDL dehumidifier offers two convenient methods for water removal:

Figure 4: Illustration of the two drainage methods: manual emptying of the 2.5L water tank and continuous drainage using the provided hose.
A. Manual Drainage (Water Tank):
- The dehumidifier is equipped with a removable 2.5-liter water tank.
- When the water tank is full, the 'Tank Full' indicator light will illuminate, and the dehumidifier will automatically shut off to prevent overflow.
- Carefully pull out the water tank from the front of the unit.
- Empty the collected water into a sink or drain.
- Slide the empty water tank back into the unit until it clicks into place. The unit will resume operation.
B. Continuous Drainage:
For continuous operation without needing to empty the water tank, you can use the continuous drainage option.
- Locate the continuous drainage outlet on the back or side of the unit.
- Connect the provided drainage hose (or a standard garden hose) to the drainage outlet. Ensure the connection is secure to prevent leaks.
- Route the other end of the hose to a suitable drain (e.g., floor drain, large bucket, sink). Ensure the hose is sloped downwards to allow gravity to drain the water effectively. Do not allow the hose to kink or be elevated above the drainage outlet.
- Once connected, the water will continuously drain, and the water tank will not fill up.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your dehumidifier.
A. Cleaning the Air Filter:
The dehumidifier features a detachable and washable air filter. A dirty filter can reduce efficiency and airflow.
- Unplug the dehumidifier from the power outlet.
- Locate the air filter, typically on the back or side of the unit. Gently pull it out.
- Wash the filter with warm, soapy water. Rinse thoroughly under running water.
- Allow the filter to air dry completely before reinstalling it. Do not use a dryer or direct heat.
- Slide the dry filter back into its slot.
- Recommendation: Clean the air filter every two weeks or more frequently if used in dusty environments.
B. Cleaning the Exterior:
- Unplug the dehumidifier.
- Wipe the exterior casing with a soft, damp cloth.
- Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the surface.
C. Storage:
- If storing the unit for an extended period, unplug it and empty the water tank completely.
- Clean the air filter and the exterior.
- Coil the power cord neatly.
- Store the dehumidifier in an upright position in a cool, dry place, away from direct sunlight and extreme temperatures.
7. Troubleshooting
Before contacting customer support, please refer to the following troubleshooting guide for common issues.
| Problem | Possible Cause | Solution |
|---|---|---|
| Dehumidifier does not turn on. | No power supply. Water tank is full. Unit not settled for 24 hours. | Ensure the power cord is securely plugged into a working outlet. Empty the water tank and ensure it is correctly reinserted. If newly unboxed, allow 24 hours for refrigerant to settle before plugging in. |
| Unit is running but not collecting water. | Ambient humidity is too low. Air filter is clogged. Room temperature is too low. Unit is in defrost mode. | Check the ambient humidity level on the display. If it's below your target, the unit may not operate. Clean the air filter as described in the Maintenance section. The unit operates optimally between 5°C - 32°C (41°F - 90°F). Performance decreases outside this range. If the defrost indicator is on, this is normal operation. Wait for it to complete. |
| Unit is noisy. | Unit is not on a level surface. Air filter is clogged. Obstruction in fan. | Ensure the unit is placed on a flat, stable surface. Clean the air filter. Check for any foreign objects near the fan or air vents. |
| Water leaks from the unit. | Water tank not properly inserted. Continuous drainage hose is loose or kinked. | Remove and reinsert the water tank, ensuring it is seated correctly. Check the continuous drainage hose connection and ensure it is not kinked or blocked, and that it slopes downwards. |
| Humidity indicator light is always red/green/blue. | Reflects current ambient humidity. | This is normal. The light indicates the current humidity range: Red (>70%), Green (50%~70%), Blue (<50%). |
8. Specifications
Technical specifications for the STUBDL 12L/Day Dehumidifier, Model PD12R-03EE.
| Feature | Specification |
|---|---|
| Model Number | PD12R-03EE |
| Dehumidification Capacity | 12 Liters/Day (at 86°F, 80%RH) |
| Power Consumption | 250W (maximum efficiency) |
| Water Tank Capacity | 2.5 Liters |
| Humidity Setting Range | 30% - 90% RH |
| Operating Temperature Range | 5°C - 32°C (41°F - 90°F) |
| Noise Level | < 35 dB |
| Product Dimensions (D x W x H) | 11.42" x 6.69" x 16.34" (29cm x 17cm x 41.5cm) |
| Item Weight | 18.77 pounds |
| Manufacturer | STUBDL |
9. Warranty and Support
Information regarding warranty coverage and customer support for the STUBDL 12L/Day Dehumidifier (Model PD12R-03EE) is not available in the provided product data. Please refer to the product packaging or contact the retailer where the product was purchased for specific warranty terms and support contact details.