Electric heating cabel Hornisse 3,6mm (44,4m)

Product detailed description

This electric heating cable is designed for integration into screed-based underfloor heating systems. It is commonly used in residential and commercial applications such as living rooms, kitchens, bathrooms, offices and service areas. The cable is laid directly onto the screed surface, allowing for discreet installation beneath tiles, panels or stone flooring. It provides uniform thermal comfort by eliminating cold spots and offers fast response times for efficient temperature control.

The system is particularly suitable for spaces requiring supplementary heating near windows, balcony doors or in areas with high heat loss. The cable’s flexibility allows for easy installation in hard-to-reach areas and complex room geometries. The installation process involves laying the cable on a minimum 5 °C screed surface and connecting it to a standard 230 V supply using a 2-core plus earth cable with a 2.5 m lead. Careful planning of spacing and coverage is essential to ensure even heat distribution and avoid overloading the circuit.

Technical parameters

Code	HO CABLE/18-800

The cable has a fixed power rating of 18 W/m and is available in various lengths to suit different room sizes. The maximum operating temperature of the conductor is 45 °C, and the minimum installation temperature is 5 °C. The cable construction includes a fluoropolymer-insulated core, a dual-core design and PVC outer insulation. The maximum bending radius is 50 mm, and the cable diameter ranges between 3.1 mm and 3.6 mm. These parameters are critical for determining the correct length and layout to achieve the desired heat output per square meter.

Installation and connection

Begin by ensuring the screed surface is dry and at a minimum temperature of 5 °C. Lay the cable evenly across the surface, maintaining consistent spacing according to the required wattage per square meter. Avoid overlapping the cable and keep it away from metal objects or sharp edges that could damage the insulation. Secure the cable using clips or mesh to prevent shifting during screed pouring. Connect the cable using a 2-core plus earth supply cable with a 2.5 m lead. Ensure the grounding is properly connected and that the circuit is protected with a suitable fuse or circuit breaker. Check the resistance and continuity of the cable before covering it with screed to confirm there are no breaks or faults.

Common installation mistakes include incorrect spacing, overlapping cables and failure to check resistance before covering the cable. These can lead to uneven heating or electrical faults. Always follow the manufacturer’s guidelines for spacing and wattage calculations based on room size and insulation levels.

Compatibility and accessories

This heating cable is compatible with standard 230 V electrical systems and requires a thermostat for temperature regulation. For larger installations, multiple cables can be connected in parallel, provided the total wattage does not exceed the circuit capacity. Additional accessories such as thermostats, temperature sensors and control units should be selected based on the system size and user requirements. Related products include the Hornisse 3.6mm heating cables with lengths of 15 m, 22.2 m, 37.8 m, 61.1 m, 67.8 m and 83.3 m, which can be combined to customise the system for different room dimensions.

Technical background for designers

The cable operates on resistive heating principles, converting electrical energy into heat through controlled resistance in the conductive core. The fluoropolymer insulation provides high thermal and chemical resistance, while the PVC outer sheath protects against mechanical damage and moisture. This makes the cable suitable for long-term use in wet areas such as bathrooms and kitchens. The dual-core design ensures balanced current flow and minimises electromagnetic interference. The cable is embedded in the screed layer, which acts as a thermal mass to store and gradually release heat. The system’s efficiency depends on proper spacing, insulation quality and the type of flooring material used, as these affect heat transfer and energy consumption.

Designers should consider the room’s heat loss, insulation levels and occupancy patterns when calculating the required wattage per square meter. The cable’s maximum operating temperature and minimum installation temperature must also be taken into account to ensure safe and effective operation.

Service and operation

Once installed, the system requires minimal maintenance. Regular checks should include verifying the thermostat settings, inspecting the connections for signs of wear or overheating, and monitoring the system for any unusual noise or performance changes. There are no scheduled service intervals specified, but any faults should be addressed immediately by disconnecting the power and inspecting the cable for damage. The cable is designed for long-term durability and should remain functional for many years with proper installation and use.

Frequently asked questions

Can the Hornisse 3.6mm cable be used in bathrooms?
Yes, the cable is suitable for use in bathrooms due to its moisture-resistant PVC outer insulation and fluoropolymer core insulation.

What is the minimum spacing between cables during installation?
The spacing should be determined based on the desired wattage per square meter and the cable’s 18 W/m rating. Overlapping the cable is not recommended.

Is the cable compatible with thermostats?
Yes, the system requires a thermostat for temperature control. Select a model suitable for the system’s wattage and installation type.

Can multiple Hornisse 3.6mm cables be connected together?
Multiple cables can be connected in parallel, provided the total wattage does not exceed the circuit capacity and the connections are made correctly.