1. Introduction
This manual provides detailed instructions for the safe and effective use of your COSVALVE Portable Steam Sauna Box with Red Light. This product is designed for personal indoor use, offering a home spa experience with a hexagon sauna tent, a 3L 1200W steam generator, remote control, timer, and a folding chair.
Please read this manual thoroughly before initial use and retain it for future reference.
2. Safety Information
Your safety is paramount. Observe all warnings and precautions to prevent injury or damage to the product.
- Electrical Safety: Ensure the steam generator is connected to a grounded 110V power outlet. Do not operate with wet hands or in wet conditions. The steam generator includes protection against dry heating, earth leakage, and overheating.
- Hot Steam: Steam is extremely hot. Avoid direct contact with the steam outlet and the steam inside the tent. Allow the unit to cool before handling or cleaning.
- Water Level: Do not overfill or underfill the steam generator. Always use clean water.
- Ventilation: Ensure adequate ventilation in the room where the sauna is used. The sauna tent features a large visible window for observation and ventilation.
- Health Considerations: Consult a physician before using the sauna if you are pregnant, have a heart condition, high blood pressure, diabetes, or any other medical condition. Discontinue use immediately if you feel dizzy, nauseous, or unwell.
- Children and Pets: Keep children and pets away from the sauna and steam generator during operation and while cooling down.
- Assembly: Ensure all components are correctly assembled and stable before use.
3. Package Contents
Verify that all components are present and undamaged upon unpacking:
- Hexagon Sauna Tent
- Steam Generator (3L capacity)
- Remote Control (with 1 CR2 battery included)
- Folding Chair
- Connection Hose for Steam
- Support Frame Poles
- User Manual
4. Setup Instructions
The COSVALVE Portable Steam Sauna is designed for quick and easy assembly, typically within 10 minutes.
- Assemble the Frame: Connect the stainless steel support frame poles according to the diagram. Ensure all connections are secure and stable.
- Attach the Sauna Tent: Carefully drape the hexagon sauna tent over the assembled frame. Ensure the tent fabric is properly aligned and covers the frame completely. The tent is made of super thick ultrasonic pressed cotton fabric for insulation.
- Position the Steam Generator: Place the steam generator on a flat, stable surface outside the sauna tent. Connect the steam hose from the generator to the designated inlet on the tent.
- Place the Chair: Unfold the comfortable folding chair and place it inside the sauna tent.

5. Operating Instructions
Follow these steps to operate your portable steam sauna:
- Fill the Steam Generator: Open the lid of the 3L steam generator and fill it with clean water up to the maximum fill line. Do not add essential oils or other substances directly into the water tank; use a designated aromatherapy box if available.
- Connect Power: Plug the steam generator into a standard 110V electrical outlet.
- Power On and Set Preferences: Use the control panel on the steam generator or the remote control to power on the unit.
- Timer: Set your desired session duration using the timer function, up to 99 minutes.
- Temperature: Select your preferred temperature level. The unit offers 9 temperature adjustment levels, reaching approximately 130°F (54°C).
- Pre-heating: The steam generator will begin heating the water. It typically achieves rapid heating, producing steam within 8 minutes.
- Enter the Sauna: Once steam is adequately generated, carefully open the double zipper door of the sauna tent and enter. Sit comfortably on the folding chair. The tent's design includes a red light for an enhanced experience.
- During Use: You can adjust the timer or temperature using the remote control from inside the tent. The large clear window allows for visibility.
- After Use: When the session is complete or the timer runs out, the unit will automatically shut off. Carefully exit the sauna.


6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your sauna.
- After Each Use: After each sauna session, towel dry the inside of the sauna tent. Leave the door open with a fan to ensure complete drying and prevent moisture buildup.
- Steam Generator Cleaning: Periodically clean the steam generator to remove mineral deposits. Unplug the unit and allow it to cool completely. Drain any remaining water. Fill the tank with a descaling solution (e.g., vinegar and water mixture) and let it sit for a recommended time, then rinse thoroughly.
- Tent Cleaning: The tent fabric can be wiped clean with a damp cloth and mild detergent. Do not machine wash or tumble dry.
- Storage: When not in use, ensure the sauna tent and steam generator are completely dry. The tent is lightweight and compact for easy storage.
7. Troubleshooting
If you encounter issues with your COSVALVE Portable Steam Sauna, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No steam or very little steam | Insufficient water in generator; Generator not powered on; Hose kinked or blocked. | Fill water tank to appropriate level; Ensure power is connected and unit is on; Check and straighten steam hose. |
| Unit does not power on | Power cord not plugged in; Outlet malfunction; Remote control battery depleted. | Check power connection; Test outlet with another appliance; Replace CR2 battery in remote control. |
| Sauna tent not heating effectively | Tent door/window not fully closed; Low temperature setting; Insufficient pre-heating time. | Ensure all zippers are closed; Increase temperature setting; Allow sufficient time for steam generation (approx. 8 minutes). |
If the problem persists after attempting these solutions, please contact COSVALVE customer support.
8. Specifications
- Product Model: B0FCYH3X2H
- Sauna Tent Dimensions: Approximately 73.62 inches (height), 19.69 inches (single wide)
- Steam Generator Capacity: 3 Liters
- Steam Generator Power: 1200W (rated), 1000W (output)
- Voltage: 110V
- Maximum Temperature: Up to 130°F (54°C)
- Timer Range: 1-99 minutes
- Temperature Levels: 9 adjustable levels
- Material: Super thick ultrasonic pressed cotton fabric (tent), high-quality stainless steel pipe (frame), 304 stainless steel (steamer lining)
- Item Weight: 20 pounds
- Package Dimensions: 30 x 14.5 x 10 inches
- Remote Control Battery: 1 x CR2 (included)
9. Warranty and Support
For warranty information or technical support, please contact COSVALVE customer service through their official website or the retailer where the product was purchased. Please have your product model number (B0FCYH3X2H) and purchase date available when contacting support.