Electric heating cabel Hornisse 5,5mm (140m)

Product detailed description

Electric floor heating cables installed beneath screed layers are commonly used in residential and commercial buildings to provide efficient and even heat distribution. These systems are particularly suited for rooms with tile, panel, or carpet flooring, where a concealed heating solution is required. The cables are embedded in the screed, ensuring the heating elements are protected and out of sight. This method allows for long-term thermal stability and minimises cold spots. Installers typically work with concrete or anhydrite screed, ensuring the cable is evenly spaced and correctly connected to the electrical system. The system is ideal for both new builds and renovations, especially in well-insulated spaces where supplementary or primary heating is needed.

During installation, the cable is laid in a zig-zag pattern beneath the screed, ensuring even coverage. The system requires a thermostat for temperature control and must be connected to a 230V supply. The cable is designed for long-term use and requires minimal maintenance, making it a reliable option for installers working on modern heating systems.

Technical parameters

The cable has a power output of 15 W/m and is available in various lengths, with this model being 140m. The total power output for this length is 2100 W. The operating voltage is 230V, and the maximum wire temperature is 45°C. These parameters are essential for sizing the system correctly, ensuring the electrical supply can handle the load and that the thermostat is appropriately selected. The minimum installation temperature is 5°C, which must be considered when planning the installation schedule.

Installation and connection

Installation involves laying the cable in a zig-zag pattern beneath the screed layer. The cable must be spaced evenly to ensure uniform heat distribution. The minimum bending radius is 50 mm, and the cable must not be bent beyond this to avoid damage. The power cable is a two-core cable with an earth braid and is 2.5 m in length. It must be connected to a 230V supply using a suitable junction box. The installation should be carried out in a room with a minimum temperature of 5°C to prevent cold starts. Common mistakes include incorrect spacing, which can lead to uneven heating, and failure to secure the cable properly, which can result in movement during screed pouring.

Compatibility and accessories

This cable is compatible with a range of floor coverings, including tiles, panels, and carpets. It requires a thermostat for temperature control and must be connected to a 230V supply. Additional components such as junction boxes, cable glands, and insulation materials may be required depending on the installation. Related products include the Hornisse 5.5mm cables in lengths of 15m, 25m, 40m, 60m, 80m, 100m, and other variants. These can be used in different rooms or combined to create a larger heating system.

Technical background for designers

The cable operates by converting electrical energy into heat through resistance in the conductors. The core is insulated with LSZH (Low Smoke Zero Halogen) material, which reduces the risk of toxic fumes in case of fire. The outer insulation is made of XLPE and PVC, providing durability and flexibility. The cable is designed to work with screed layers, which act as a thermal mass, storing heat and releasing it gradually. The system's efficiency is influenced by the screed thickness, insulation quality, and room size. Proper design ensures even heat distribution and minimises energy consumption.

Service and operation

The system requires minimal maintenance due to its concealed installation. Regular checks should include verifying the thermostat settings and ensuring the electrical connections are secure. There are no specified service intervals, but any issues with the heating performance should be investigated promptly. The cable is designed for long-term use and is resistant to mechanical damage when installed correctly. If the system is not functioning as expected, the first step is to check the thermostat and electrical supply.

Frequently asked questions

Can the cable be used with anhydrite screed?
Yes, the cable is suitable for use with both concrete and anhydrite screed. The screed acts as a thermal mass, enhancing the system's efficiency.

What is the maximum operating temperature of the cable?
The maximum wire temperature is 45°C. This ensures the cable remains within safe operating limits and prevents overheating.

Is the cable compatible with underfloor heating thermostats?
Yes, the cable must be connected to a thermostat for temperature control. The thermostat ensures the system operates efficiently and maintains the desired room temperature.

Can the cable be cut to a shorter length?
No, the cable is pre-manufactured in specific lengths and cannot be cut. If a different length is required, a different model should be selected.

Documents for download

• Hornisse Products (PDF)
• Manual EN (PDF)