Kermi x-net C15 thin layer system

x-net C15 thin layer system A "good centimetre" of underfloor heating especially for renovations.

Floor heating for renovation. Super slim and lightweight and quick - these are the special strengths of the x-net C15 thin layer system. Compared to the conventional systems, the knob element in the x-net C15 thin layer system is constructed such that the casting compound permanently bonds with the substrate and thus enables an extremely low floor structure. This makes the system ideal for efficient renovation solutions, with the option for heating and cooling. Laid directly on a variety of existing floor coverings, without costly chiselling or demolition.

Kermi x-net C15: a "strong" centimetre of underfloor heating especially for renovation

System benefits

  • Heating and cooling
  • Low drying times
  • Quick reaction time
  • Optimal for renovations
  • Low static weight
  • Standardised installation spacing due to the system
  • Extremely low flow temperature through low pipe covering
  • Can be laid without chiselling or demolishing works
  • Application after appropriate pre-treatment on almost all subsurface

Kermi-Plus benefits

  • Low element height of 14 mm, complete floor mounting 17 - 22 mm (without floor covering)
  • Two pipe dimensions - one knob element:
    1. x-net 5-layer pipe 10 x 1.3
    2. x-net 5-layer pipe 12 x 1.4
  • Diagonal installation of the pipe without additional pipe fasteners
  • High impact resistance
  • High pipe retention force
  • Quick installation
  • Heating technology tested according to DIN EN 1264 and DIN Certco-certified

Pipe dimensions

Kermi x-net C15: larger pipe dimension offers larger flow cross-section
x-net PE-Xc pipe 10 x 1.3
Kermi x-net C15: larger pipe dimension offers larger flow cross-section
x-net PE-Xc pipe 12 x 1.4

In one and the same knob element, the pipe dimensions 10 x 1.3 mm as well as 12 x 1.4 mm can be laid. In contrast to the pipe dimensions 10 x 1.3 mm, the x-net 5-layer pipe 12 x 1.4 mm has about 35 % more cross section of flow and thus enables:

  • Greater pipe lengths in the heating circuit
  • less heating circuits for the same area, thus more compact manifolds and distribution cabinets
  • Reduced material and installation effort


x-net C15 thin layer knob element

Kermi x-net C15: fixed in position during installation due to self-adhesive backing of the knob elements.
Fixed by the self-adhesive backing on the knob elements. Simply remove the protective foil and lay on an appropriately pre-treated surface.
Kermi x-net C15: optimum bonding of knob elements due to linking technology
Optimal placing of the knob elements using a linking technique which ensures that pipes are always laid in a straight line through the grid.
Kermi x-net C15: Rohrfixierung in alle Verlegerichtungen ohne zusätzliche Rohrbefestigungsmittel
The pipe can be fixed in any direction without additional pipe fasteners.
Kermi x-net C15: load-bearing knob elements
Even in harsh building site environments, the knob elements have high impact resistance despite their hollow spaces.
Kermi x-net C15: knob elements on pretreated tile covering
The knob elements are ideal for the renovation sector as, with the appropriate surface preparation, they can be applied directly on the existing floor and/or tiling without any chiselling or demolition work.
Kermi x-net C15: special construction of knob element lends enduring stability
The special structure of the knob element creates a very large contact surface between the sealing compound and the supporting surface. This creates a composite layer with statics which are supported by the substructure and therefore only needs a very thin layer. When composite structures are used, in addition to the largest possible surface contact, support surface preparation is also hugely important for lasting stability.

x-net 5-layer-PE-Xc pipe

Kermi x-net C15: pipe inscription indicates remaining length and pipe length already used
Printed marks on the pipe indicate the remaining length and pipe length already used, allowing optimal utilisation of pipe coils.
Kermi x-net C15: high flexibility permits tight bending radii
High flexibility allows tight bending radii and reduces the restoring forces in pipe elbows.
Kermi x-net C15: pipe and pipe connection tested according to DIN 4726 and DIN EN ISO 15875
Pipes and pipe connectors as defined in DIN 4726 and DIN EN ISO 15875 are tested and monitored regularly by an accredited independent testing institute.
Kermi x-net C15: straightforward unrolling with x-net unrolling equipment right out of the packaging
Practical pipe coil lengths up to 240 m packed in special cardboard boxes and ready to unwind straight from the packaging using the x-net pipe unwinder.
Kermi x-net C15: remaining pipe stays protected in the packaging and ready for transportation at any time.
Whether in cardboard or stretch-film packaging, the remaining pipe stays in the packaging, where it is protected from dirt and damage, and ready to be transported at any time.
Kermi x-net C15: larger pipe dimension offers larger flow cross-section
The 12 x 1.4 pipe dimension, with a 35 % larger flow cross-section compared with the 10 x 1.3 pipe dimension, has many benefits, such as longer pipe lengths per heating circuit, which means fewer heating circuits in the room, smaller distribution cabinets, lower material requirement and less work.

x-net edge insulating strips H 80 mm

Kermi x-net C15: adhesive strips for fixing the x-net edge insulation strip (H 80 mm) to the wall
Adhesive strip for wall fixing of x-net edge insulation strip H 80 mm. Height adjusted to the floor structure so that there is no adhesive residue visible in the wall area afterwards.
Kermi x-net C15: straightforward fixing of protective film with adhesive strips
The protective film can be easily and quickly fixed to the floor with the adhesive strip.
Kermi x-net C15: multiple tear-off perforations for fast tool-free shortening of edge insulation strip
Multiple tear-off slits for fast tool-free cutting of the edge insulation strip without leaving marks on the wall plaster.

x-net controls

Heating comfort at the press of a button.

Clever control for panel heating and cooling. This means the desired heating comfort can be set individually for every room. Clever control also means: Save cleverly. x-net control is available in two product lines, to precisely suit the particular requirements.

x-link® plus

The perfect connection between design radiator and underfloor heating.

The connection fitting with a white or chrome cover perfectly fits the 50 mm connection to the compact bathroom radiator.

Further information about x-link plus

Product film


A "good centimetre" of underfloor heating especially for renovations

- Low element height of 14 mm, complete floor mounting 17 - 22 mm (without floor covering)
- Two pipe dimensions - one knob element:
- Diagonal installation of the pipe without additional pipe fasteners
- High impact resistance
- High pipe retention force
- Quick installation

Kermi: Clear advantages. Complete service.

Comprehensive Kermi system x-optimised

  • Energy savings up to 34 %
  • Optimally matched components
  • Everything from a single source, from planning to commissioning

This means "Kermi system x-optimised"

12 good reasons for Kermi system x-optimised

Kermi - Zertifizierte Qualität

Certified quality

  • Kermi is certified according to DIN EN ISO 9001;2008, 14001:2004 and 50001:2011
  • Components comply with current standards and directives
  • Regular monitoring of core components by independent testing institutes
Kermi download technical data sets

Support with order process and planning

  • Support with order preparation
  • Support with a wide range of services during system planning
  • Dimensioning data set for liNear software
  • Comprehensive software for dimensioning rooms
  • Comprehensive information material
  • Extensive technical Internet portal
Kermi x-net C11: with outstanding customer service

Complete customer service

  • Nationwide service team as well as field service teams for fast on-site assistance
  • Competent in-house service team for fast telephone assistance
  • Professional, unbureaucratic processing of complaints
  • Detailed initial training on-site
  • Detailed planning and design consultation
Kermi system knowledge down to the last detail

System knowledge in great detail

  • Carefully engineered system technology developed in-house for easier, fast, safe work
  • Many Kermi innovations
  • Kermi special solutions for practical application by tradespeople

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