1. Introduction
This manual provides essential information for the safe and efficient operation of your Sentiotec ThermoFLUX-Bbundle Electric Sauna Heater. Please read all instructions carefully before installation and use to ensure proper function and to prevent injury or damage.
The Sentiotec ThermoFLUX-Bbundle is an electric sauna heater designed for modern sauna environments, offering innovative technology and an integrated control unit. It is suitable for single-phase connection and features a timer and thermostat for precise control.
2. Safety Instructions
WARNING: Failure to follow these safety instructions may result in fire, electric shock, serious injury, or death.
- Installation and electrical connections must be performed by a qualified electrician in accordance with all local and national electrical codes.
- Do not operate the heater without sauna stones. Ensure stones are properly placed to allow for air circulation.
- Never cover the heater or place flammable materials near it. Maintain adequate safety distances as specified in the installation guide.
- Do not pour excessive amounts of water onto the hot stones. Use only water intended for sauna use.
- Keep children and pets away from the hot heater.
- Disconnect power before performing any maintenance or cleaning.
- Ensure proper ventilation in the sauna room.
3. Package Contents
Verify that all components are present before beginning installation:
- Sentiotec ThermoFLUX-Bbundle Electric Sauna Heater Unit
- Integrated Control Unit
- Mounting Hardware (screws, brackets, etc.)
- User Manual (this document)
Note: Sauna stones are typically sold separately and are not included with the heater.
4. Setup and Installation
The Sentiotec ThermoFLUX-Bbundle heater is designed for quick and easy installation. It can be mounted in an angular position and offers a free choice for the side on which the control knobs are positioned.

Figure 4.1: Sentiotec ThermoFLUX-Bbundle Electric Sauna Heater. This image displays the Sentiotec ThermoFLUX-Bbundle electric sauna heater. It features a sleek black casing with the 'sentiotec' logo visible on the front. At the bottom, two control knobs are present for adjusting settings. The top part shows the heating elements.
4.1 Electrical Connection
- The heater operates at 3.6 kW and is suitable for single-phase connection.
- Ensure the electrical supply matches the heater's requirements.
- All wiring must comply with local electrical codes and be performed by a certified professional.
4.2 Mounting
- Mount the heater securely to a wall in the sauna room, ensuring it is level and stable.
- Refer to the detailed installation instructions provided with the heater for specific mounting heights and clearances from walls and benches.
- The design allows for angular mounting, providing flexibility in sauna room layout.
4.3 Stone Placement
- Place sauna stones (not included) into the stone compartment of the heater.
- Arrange stones loosely to allow for optimal air circulation through the heating elements.
- Do not pack stones too tightly, as this can impede heating efficiency and potentially damage the elements.
5. Operating Instructions
The Sentiotec ThermoFLUX-Bbundle features an integrated control unit with two knobs for easy operation.
5.1 Powering On/Off
- Ensure the heater is properly installed and connected to the power supply.
- Turn the main power switch (if applicable, usually external to the heater) to the ON position.
5.2 Adjusting Temperature
- Use the thermostat knob (typically marked with temperature symbols or a range) to set the desired sauna temperature.
- The heater will automatically heat the sauna room to the set temperature and maintain it.
5.3 Setting the Timer
- Use the timer knob (typically marked with time intervals) to set the desired operating time for the heater.
- The timer allows you to pre-set the heater to turn on at a specific time or to operate for a set duration.
- Refer to the markings on the knob for specific time increments.
6. Maintenance
Regular maintenance ensures the longevity and safe operation of your sauna heater.
- Cleaning: Ensure the heater is completely cool and disconnected from power before cleaning. Wipe the exterior with a damp cloth. Do not use abrasive cleaners or solvents.
- Stone Inspection: Periodically inspect the sauna stones for signs of crumbling or degradation. Replace any broken or worn-out stones to maintain heating efficiency and prevent damage to the elements.
- Ventilation: Ensure that the sauna room's ventilation system is clear and unobstructed.
- Electrical Connections: Have a qualified electrician periodically check electrical connections for tightness and signs of wear.
7. Troubleshooting
If you encounter issues with your Sentiotec ThermoFLUX-Bbundle heater, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Heater does not turn on. | No power supply; tripped circuit breaker; faulty wiring. | Check power connection and circuit breaker. Consult a qualified electrician for wiring issues. |
| Heater not heating sufficiently. | Incorrect temperature setting; insufficient stones; poor air circulation; faulty heating element. | Adjust thermostat. Ensure proper stone placement. Check for obstructions. Contact service if elements are faulty. |
| Timer not functioning. | Incorrect setting; internal fault. | Review timer settings. If issue persists, contact customer support. |
For problems not listed here or if solutions do not resolve the issue, please contact Sentiotec customer support or a certified service technician.
8. Specifications
| Feature | Detail |
|---|---|
| Model Number | 1-053-600 (ST136400B) |
| Power Output | 3.6 kW |
| Dimensions (H x W x D) | 63.5 x 20 x 34 cm (approx. 25 x 7.9 x 13.4 inches) |
| Weight | 8 kg (approx. 17.6 lbs) |
| Color | Black |
| Control Unit | Integrated (Timer and Thermostat) |
| Connection Type | Single-phase |
9. Warranty and Support
For warranty information, please refer to the documentation provided at the time of purchase or contact your retailer. Sentiotec products typically come with a manufacturer's warranty covering defects in materials and workmanship.
For technical support, spare parts, or service inquiries, please contact Sentiotec customer service or the authorized dealer from whom you purchased the product. Keep your proof of purchase handy when contacting support.
You can often find contact information on the official Sentiotec website: www.sentiotec.com





