Introduction
This manual provides essential instructions for the safe and effective use of your KETOTEK 21W Seedling Heat Mat. Please read this manual thoroughly before operation and retain it for future reference.
Important Safety Instructions
- Do not immerse in water. The mat is IP67 waterproof, but immersion is not recommended for the electrical connection.
- Do not place the heat mat on any heating or insulating device.
- Do not pierce the PVC surface of the heat mat.
- Always unroll the heat mat flat during use. Do not roll or fold it in half when powered on.
- Ensure the power cord is not damaged before use.
- Use only with a standard 220V power outlet.
- Keep out of reach of children and pets.
- For indoor use only.
Warning: Failure to follow these safety instructions may result in electric shock, fire, or damage to the product.
Product Features
- Stable Heating System: Automatically warms the rooting area 5-11°C (10-20°F) above ambient air temperature. Provides stable, even heat distribution without overheating.
- Durable and Reliable: Multi-layer structure with integrated insulated heating wire and PET film design. Meets strict CE standards.
- Waterproof Design: IP67 rated surface for easy and safe cleaning.
- Energy Efficient: Operates at only 21 watts, saving electricity.
- Optimal Size: Measures 25.2 cm x 52.6 cm (approximately 10" x 20.75"), suitable for standard 1020 seedling trays.

Image: The KETOTEK 21W Seedling Heat Mat, showing its rectangular shape and power cord.

Image: Diagram illustrating the 5-layer structure of the heat mat, including durable PVC, insulated PET, and Nikrothal heating wire. Also shows the sealed edge and power cable.
Setup Instructions
- Unpack: Carefully remove the heat mat from its packaging.
- Placement: Lay the heat mat flat on a dry, stable, and level surface. Ensure there are no wrinkles or folds.
- Position Seedlings: Place your seedling tray or propagation container directly on top of the heat mat. For best results, cover the tray with a humidity dome.
- Power Connection: Plug the power cord into a standard 220V electrical outlet.
- Initial Warm-up: Allow at least 20 minutes for the mat to reach its optimal operating temperature, which will be 5-11°C (10-20°F) above the ambient air temperature.

Image: The KETOTEK heat mat displaying printed instructions and a germination guide for various plants.

Image: The KETOTEK heat mat placed under seedling trays with young plants, illustrating the upward heat distribution.
Operating Instructions
The KETOTEK Seedling Heat Mat is designed for continuous operation to maintain a consistent temperature for germination and rooting. It does not feature adjustable temperature controls. For precise temperature management, an external thermostat (sold separately) can be used.
- Once plugged in, the mat will begin to heat.
- Monitor the temperature of your rooting medium using a soil thermometer for optimal results.
- Ensure adequate ventilation to prevent excessive humidity, especially when using a humidity dome.

Image: Examples of the heat mat's versatile applications, including plant propagation, reptile terrarium heating, and home brewing fermentation.
Maintenance
- Cleaning: Disconnect the mat from the power outlet before cleaning. Wipe the surface with a damp cloth. Do not use abrasive cleaners or immerse the mat in water.
- Storage: When not in use, ensure the mat is clean and dry. Roll it loosely or store it flat in a cool, dry place, away from direct sunlight.
- Inspection: Periodically inspect the mat and power cord for any signs of damage, such as cuts, fraying, or discoloration. If damage is found, discontinue use immediately.

Image: The KETOTEK heat mat with water droplets on its surface, demonstrating its IP67 waterproof capability for easy cleaning.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Mat is not heating |
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| Mat is not warm enough |
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| Mat is too hot |
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Specifications
| Model Number | YQ103 |
| Power Output | 21 Watts |
| Voltage | 230V |
| Dimensions (L x W) | 52.6 cm x 25.2 cm (approx. 10" x 20.75") |
| IP Rating | IP67 (Waterproof) |
| Temperature Increase | 5-11°C (10-20°F) above ambient |
| Certifications | CE |
| Country of Origin | China |
Warranty and Support
For warranty information or technical support, please contact KETOTEK customer service. Refer to your purchase documentation for specific warranty terms and contact details.
Email: info@ketotek.com
Please have your model number (YQ103) and purchase date available when contacting support.





