From the perspective of comfort and ease of use, electric underfloor heating is significantly superior to other heating methods, thus receiving widespread praise from users. However, the advantages of electric underfloor heating go far beyond these. For example, regarding energy conservation, a major concern for consumers, electric underfloor heating using heating cables also demonstrates a clear advantage. According to relevant statistics, using a heating cable radiant heating system can achieve an indoor temperature 2-3℃ lower than traditional heating while maintaining the same heating effect, resulting in energy savings of over 15%. Moreover, each room in a heating cable underfloor heating system can be independently controlled, further enhancing energy efficiency. Because of these advantages, heating cables are widely used. So, what issues should users consider when choosing heating cables? Below, underfloor heating experts will analyze this for you.
1. Distinguish between indoor and outdoor cables.
First, when choosing an electric heating system, it's important to know that heating cables are divided into outdoor and indoor cables. Outdoor cables are used for snow and ice removal, are inexpensive but emit high levels of electromagnetic radiation, making them unsuitable for areas where people stay for extended periods. Indoor cables have excellent radiation shielding, ensuring electromagnetic radiation remains within safe limits. Multi-strand twisted wire is preferred for heating cables. For safe cables, the cold and hot wire connections must be made at the original manufacturer and should not be cut or spliced on-site. Furthermore, heating cables come in single-conductor and double-conductor versions, and vary in length and price. For example, Daewoo underfloor heating in South Korea offers more than 10 types of heating cables, and their product center provides detailed information on non-magnetic heating cables with a warranty period of up to 10 years.
2. Pay attention to insulation materials
The insulation material for a heated cable underfloor heating system is also crucial. High-density, high-strength floor insulation not only minimizes downward heat loss but also prevents compression of the insulation material over long-term use. Extruded polystyrene (XPS) insulation boards with a thickness of at least 2 cm are the preferred choice. If polystyrene foam boards are chosen, the density should not be less than 20 kg/m³. It is particularly important that the insulation board be made of flame-retardant material. The insulation board must have a reflective layer; this layer not only reflects heat but also protects the heating wires from localized overheating.
3. Pay attention to auxiliary equipment such as thermostats.
Generally speaking, smart thermostats can improve the comfort of underfloor heating and effectively reduce energy consumption. There are numerous types, models, and specifications of thermostats, and the main quality issue lies in their sensitivity. The accuracy of the thermostat and indoor temperature setting is also crucial: a good thermostat can accurately adjust the temperature and accurately determine the indoor temperature, primarily through a probe. Furthermore, the origin, brand, and model of the thermostat result in significant price differences for electric underfloor heating systems. There are also various types of thermostats, including mechanical knob types and programmable digital LCD types; the usage of different thermostats varies greatly, so ease of use should be considered when choosing a thermostat.
4. Pay attention to heat sources
In electric underfloor heating systems using heating cables, the conductor core directly determines the stability of the heating system's power output over 50 years, i.e., the stability of the heating effect. The two main factors affecting resistivity are oxidation and changes in conductor diameter after stretching. Therefore, when selecting the conductor core, it is essential to choose an alloy material with good oxidation resistance and high tensile strength. The conductor core structure should utilize a multi-stranded design to reduce the thermal elongation coefficient and ensure thermal compatibility between the conductor core and the insulation and sheath materials. The insulation and sheath materials must have an aging lifespan of at least fifty years at temperatures between 60℃ and 80℃. The alloy shielding layer effectively blocks interference from the electric field and provides leakage protection. Therefore, the selection of the heating cable is crucial.
