1. Product Overview
The Sanitas SWB 20 Heated Underblanket is designed to provide comfortable warmth and a healthy sleep environment. Made from high-quality non-woven material, this underblanket measures 150 x 80 cm and is suitable for standard mattresses. It features an easy-to-use control with three illuminated temperature settings and an automatic shut-off system for safety.
Key Features:
- 3 illuminated temperature settings for personalized warmth.
- Integrated safety system with automatic shut-off to prevent overheating.
- Easy attachment to the mattress with elastic straps.
- Soft non-woven material for enhanced comfort.
- Removable control switch allows for machine washing up to 30°C.
- Product dimensions: 150 x 80 cm.
- Power: 60 watts.
2. Important Safety Instructions
Please read these safety instructions carefully before using the heated underblanket and keep them for future reference. Incorrect use can lead to hazards.
- This heated underblanket is intended for domestic/private use only.
- Do not use the underblanket if it is folded, creased, or bunched up.
- Always ensure the underblanket is spread flat on the mattress before use.
- The integrated safety system automatically switches off the underblanket in case of overheating. If this occurs, the underblanket cannot be used again.
- Do not insert pins or other sharp objects into the underblanket.
- Do not use the underblanket on very young children, incapacitated persons, or persons insensitive to heat.
- Always disconnect the underblanket from the mains supply when not in use or before cleaning.
- Do not use the underblanket if it is wet.
- Keep the control switch dry and do not immerse it in water.
3. Setup
Follow these steps to properly set up your Sanitas SWB 20 Heated Underblanket:
- Unpack the heated underblanket and ensure all components are present and undamaged.
- Place the underblanket directly on your mattress. Ensure it is spread out smoothly and not folded or creased.
- Secure the underblanket to the mattress using the elastic straps located at each corner. These straps help prevent the underblanket from slipping during use.
- Once secured, place your fitted sheet over the heated underblanket as usual.

Image: Elastic straps are used to securely attach the Sanitas SWB 20 Heated Underblanket to the mattress, ensuring it stays flat and in place.
4. Operating Instructions
To operate your heated underblanket, follow these steps:
- Connect the control switch to the underblanket by plugging the connector firmly into the socket on the underblanket.
- Plug the power cord into a suitable mains socket.
- Turn on the underblanket and select your desired temperature setting using the control switch. The switch has three illuminated temperature levels: 1 (low), 2 (medium), and 3 (high).
- Allow approximately 30 minutes for the underblanket to preheat and reach the selected temperature.
- For continuous use, you can adjust the temperature to a lower setting once the bed is warm.
- To switch off the underblanket, set the control switch to the '0' position. Unplug the power cord from the mains socket when not in use.

Image: The Sanitas SWB 20 Heated Underblanket features a soft non-woven material and an easy-to-use control switch for adjusting temperature settings.
5. Maintenance and Cleaning
Proper maintenance ensures the longevity and hygiene of your heated underblanket:
- Before cleaning, always unplug the underblanket from the mains and detach the control switch from the underblanket.
- The heated underblanket is machine washable. Wash it gently at a maximum temperature of 30°C. Use a mild detergent.
- Do not bleach, tumble dry, iron, or dry clean the underblanket.
- After washing, reshape the underblanket to its original size and allow it to air dry completely before re-using or storing. Do not use clothes pegs or similar items to hang it, as this may damage the heating elements.
- Store the underblanket in a dry, clean place, preferably in its original packaging, when not in use. Ensure it is not folded tightly or heavy objects are placed on it.

Image: The Sanitas SWB 20 Heated Underblanket is machine washable at temperatures up to 30°C, ensuring hygienic use.
6. Troubleshooting
If you encounter issues with your Sanitas SWB 20 Heated Underblanket, please refer to the following common problems and solutions:
- Underblanket does not heat up:
- Ensure the power cord is securely plugged into a working mains socket.
- Check that the control switch is firmly connected to the underblanket.
- Verify that the control switch is set to a temperature level (1, 2, or 3) and not '0'.
- If the safety system has activated due to overheating, the underblanket will no longer function.
- Underblanket heats unevenly:
- Ensure the underblanket is spread completely flat on the mattress without any folds or creases.
- Control switch indicator light is off:
- Check the power connection and ensure the switch is turned on.
- If the safety system has activated, the indicator light may not illuminate.
If the problem persists after attempting these solutions, please contact customer support.
7. Technical Specifications
| Model: | SWB 20 |
| Dimensions (L x W): | 150 x 80 cm |
| Power: | 60 Watts |
| Material: | Non-woven fabric |
| Temperature Levels: | 3 (illuminated) |
| Safety Features: | Automatic shut-off, Overheat protection |
| Washable: | Machine washable up to 30°C (with removable switch) |
| Country of Origin: | China |
8. Warranty and Support
This Sanitas SWB 20 Heated Underblanket comes with a manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions, including the warranty period and coverage details.
For technical support, troubleshooting assistance, or warranty claims, please contact Sanitas customer service. Contact information can typically be found on the product packaging, the official Sanitas website, or the warranty documentation.
When contacting support, please have your product model number (SWB 20) and proof of purchase readily available.





