ThermoSphere Thermonet Underfloor Heating Mesh

ThermoSphere Mesh – Key Features

  • Self-adhesive mesh for quick and secure setup, backed by a lifetime guarantee.
  • TwistedTwin Cable: Durable, stress-minimized, and fully earthed heating cable exclusive to ThermoSphere.
  • Low Profile: LayFlat technology with a 4mm thick cold tail for easy concealment.
  • Enhanced Protection: Wire-side-down installation protects the heating cable.
  • Versatile Use: Suitable for both floors and walls, ideal for wet rooms and shower cubicles.
  • Floor Compatibility: Recommended for tile and stone, adaptable for carpet, vinyl, and other specifications with accessories.
  • Variable Output: Choose from 200W/m² for high-demand rooms, 150W/m² for primary heat, and 100W/m² for floor warming.
  • Efficient Control: Pair with a compatible thermostat for optimal efficiency and cost control.

Available in sizes ranging from 1m2 to 24m2, with outputs of 100w/m2, 150w/m2 and 200w/m2.

All sizes are 0.5m wide.

  • * The 100w/m2 and 200w/m2 outputs are available by special order only.

Product Codes: 5100.02, 5100.03, 5100.04, 5100.05, 5100.06, 5100.07, 5100.08, 5100.09, 5100.1, 5100.12, 5100.14, 5100.16, 5100.18, 5100.2, 5100.24, 5100.28, 5100.32, 5100.4, 5100.48, 5101.1, 5101.2, 5102.2, 5102.24



Experience the extraordinary

Designed with ease of installation in mind, ThermoSphere Mesh oozes all of the exceptional quality you would expect from a British made underfloor heating system. The self-adhesive mesh sticks to the substrate wire-side-down which protects the fully earthed TwistedTwin heating cable and speeds up the installation process. All backed by a lifetime guarantee!


The heating mat of preference

With so many unique features, the ThermoSphere Mesh is the electric underfloor heating system of preference for many installers and homeowners alike.

1. Fully self-adhesive

The self-adhesive backing speeds up installation by holding the mesh to the substrate for easy self-levelling and tile fixing.

2. TwistedTwin cable

Exclusive to ThermoSphere, the TwistedTwin heating cable is the most robust and long lasting cable in the market. The twisted construction minimises cable stress and comes with full earth protection to make it one of the safest heating cables available.

3. Low profile

LayFlat technology makes installation easy. The cold tail is only 4mm thick so it can be concealed within the tile adhesive layer

4. Cable protection

It’s installed wire-side-down which means the heating cable is protected by the mesh from damage during installation.

5. Use for walls and floors

ThermoSphere Mesh is so versatile, you can even add that little bit of extra comfort by installing it under wall tiles in wet rooms and shower cubicles.


Floor finishes

ThermoSphere Mesh is recommended for tile and stone floors, but with the right accessories it can be used in almost any type of floor specification including carpet and vinyl, as well as wet rooms.

A choice of output

The higher the wattage, the faster the heat-up time. For example 200W/m2 is perfect for high demand rooms like conservatories. 150W/m2 is a great primary heat source for well insulated rooms and is the standard option for most installations. It is recommended that 100W/m2 is for floor warming only.

Control with ease

Choosing the right thermostat to match your lifestyle will help your electric underfloor heating system run more efficiently and keep your heating bills under control.

Additional information


1.5m2, 10m2, 12m2, 14m2, 16m2, 1m2, 2.5m2, 20m2, 24m2, 2m2, 3.5m2, 3m2, 4.5m2, 4m2, 5m2, 6m2, 7m2, 8m2, 9m2


100w, 150w, 200w