Quick Comparison of MENRED TT, GM and EV Heating Cables

The following table summarizes the main structural differences among the three series.

The table is intended as a general comparison, not a final engineering specification. Cable output, length, voltage, certification and installation suitability should always be confirmed against the datasheet and installation instructions for the exact model.

What Do All Three Heating Cable Series Have in Common?

Although the TT, GM and EV series serve different product requirements, they share several important design features.

Multi-Strand Heating-Wire Construction

All three series use a multi-strand heating-wire configuration. Compared with relying on a single heating strand, the multi-strand structure provides a larger conductive surface area and supports strong electrical conductivity. It also helps distribute heat more uniformly along the cable and provides the flexibility needed when laying a floor-heating circuit.

This construction reflects MENRED's consistent product approach:

• Large conductive surface area
• Strong electrical conductivity
• Uniform heat dissipation
• Stable heating performance
• Flexible cable structure for floor-heating installation

The cable must still be installed at the correct spacing and within the specified output range. Cable construction alone does not determine the final heat output of a room; floor insulation, covering material, installation spacing and control strategy also affect system performance.

PVC Outer Protective Sheath

The TT, GM and EV series all use a PVC outer protective sheath. This external layer surrounds the internal heating, insulation and shielding components and helps protect them from wear during installation and long-term use.

Although all three cables use PVC, this does not mean that their sheath construction is identical. The EV series uses a different manufacturing process for its outer sheath, which is one of the distinctions discussed below.

Difference 1: Outer-Sheath Manufacturing

The EV series uses German-imported manufacturing technology for its PVC outer protective sheath. The process is intended to create a refined surface texture while providing durable external protection for the internal cable structure.

For installers and buyers, the sheath is more than a colored outer layer. It is the cable's first line of protection against handling and installation-related wear. A consistent sheath also helps protect the insulation and heating components throughout the cable's operating life.

Difference 2: Electromagnetic Shielding Structure

Shielding is one of the clearest structural differences between the EV series and the TT and GM series.

Both designs are intended to support electrical safety and shielding, but their construction is different. The correct choice should be based on the project's electrical design, installation environment and applicable standards rather than on appearance alone.

Proper grounding remains essential. A shielding layer cannot compensate for incorrect wiring, missing earth connections or installation that does not follow the product instructions and local electrical regulations.

Difference 3: TT Implicit Joint Technology

The TT series uses implicit joint technology in its connector construction. Its integrated, monolithic connection requires a more complex manufacturing process and involves a higher production cost than a conventional connector structure.

The purpose of this integrated construction is to improve waterproofing and electrical insulation around the connection area. By reducing separate or exposed transition points, it also helps minimize potential weak points and supports long-term connection reliability.

This makes the TT series particularly relevant to projects and buyers that place greater emphasis on connector construction, insulation and protection at the joint.

The integrated design should not be interpreted as permission to install the connector in any location or condition. Installation boundaries, wet-area requirements and test procedures must still follow the relevant MENRED installation manual and local electrical code.

Difference 4: Silicone Rubber vs XLPE Insulation

Insulation material is another important difference among the three series.

TT and EV: Silicone-Rubber Insulation

Both the TT and EV series use silicone rubber around their internal components. Silicone rubber is well suited to electric heating applications because it combines electrical insulation with heat resistance and flexibility.

Its principal characteristics include:

• Strong electrical insulation
• High-temperature resistance
• Good coverage around internal components
• Resistance to aging
• Resistance to cracking and damage
• Reliable performance under repeated heating cycles

These characteristics make silicone-rubber insulation relevant where buyers prioritize thermal endurance and long-term insulation performance.

GM: XLPE Insulation

The GM series uses cross-linked polyethylene, commonly known as XLPE. XLPE is a widely used electrical insulation material that offers a practical balance between product performance and cost.

For distributors or projects that must control purchasing costs while maintaining a functional heating-cable structure, the GM series provides a cost-effective alternative. The use of XLPE should not be interpreted as inherently inferior quality; it represents a different material and product-positioning choice.

Which MENRED Heating Cable Should You Choose?

There is no single series that is automatically the best choice for every floor-heating project. Selection should start with the installation conditions and technical priorities.

Before making a final selection, confirm the required heating output, cable length, installation area, floor finish, insulation conditions, supply voltage and certification requirements. MENRED can then match these requirements with the appropriate product configuration.

Heating Cable Selection Checklist

Providing complete project information helps manufacturers and suppliers recommend the correct cable and prepare a more accurate quotation. Buyers should confirm the following points:

1. Project type: residential, commercial or another application
2. Heating purpose: primary room heating or supplementary comfort heating
3. Required output: cable output and target wattage per square meter
4. Available heated area: excluding fixed furniture and non-heated zones
5. Floor covering: tile, stone or another approved finish
6. Thermal insulation: floor build-up and insulation condition
7. Supply voltage: according to the destination market and project
8. Installation environment: wet area, dry area or another defined zone
9. Shielding preference: based on electrical design and market requirements
10. Insulation requirement: silicone rubber or XLPE
11. Certification: applicable national or regional compliance requirements
12. Commercial requirements: estimated quantity, OEM branding and packaging

Heating Cable vs Electric Underfloor Heating Mat

A loose heating cable gives the installer flexibility to plan the laying pattern and spacing for rooms with irregular shapes. However, it also requires careful layout calculations and consistent installation spacing.

An electric heating mat uses a heating cable pre-attached to a mesh. The predefined spacing can make product selection and on-site installation more convenient, especially in regular bathroom, bedroom and living-area layouts.

For projects that prefer predefined cable spacing, explore the MENRED electric underfloor heating mat. MENRED provides heating-mat options for residential and light-commercial electric floor-heating applications.

The choice between a loose cable and a heating mat depends on room geometry, available build-up height, installation method, required output and installer preference. Neither format removes the need for correct floor preparation, insulation, electrical testing and thermostat control.

Typical Applications and Buyers

The TT, GM and EV comparison is relevant to a wide range of floor-heating professionals and purchasing teams, including:

For distributors, understanding the differences among the three series can also help create a clearer product range. Instead of competing only on price, each series can be positioned according to connector design, shielding construction, insulation material and the expectations of the target market.

Frequently Asked Questions

Work with MENRED

Founded in 1995, MENRED manufactures electric floor-heating cables, heating mats, thermostats and related HVAC control products for international distributors, contractors and project partners.

MENRED supports product selection and OEM cooperation according to the target market and order requirements. When requesting a recommendation or quotation, provide the installation area, required wattage, cable or mat dimensions, supply voltage, estimated quantity and certification requirements.

Need Help Selecting the Right Electric Heating Cable?

Contact MENRED with your floor type, installation area, required heating output, supply voltage and estimated order quantity. Our team will help you compare TT, GM and EV heating cables and identify a suitable electric floor-heating solution for your market or project.