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Thermogroup Thermonet Underfloor Heating 150W/m² - Full Kit

Special Offer Available
SKU 111502T
Original price $424
Current price $373

4 payments of $93.25 with or

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An electric underfloor heating system provides an energy efficient, on demand heating system as well as interior design flexibility and improves comfort and space for everyone.

  • Thermonet underfloor heating full kit ready for installation
  • Kit items include Thermonet 150W/m² Mat, Programmable Thermostat, Floor Temperature Sensor, Sensor Conduit, Cable Monitor and Installation Guide
  • Choose from 1 square metre through to 10 square metre kits
  • Thermonet features 3.5mm TwistedTwin cable, the unique stress free cable construction creates a longer lasting heating cable with zero electromagnetic field (Zero EMF)
  • Thermonet is installed wire-side-down which means the heating cable is protected from damage during installation by the hard wearing mesh layer
  • Suitable for installation above the screed, directly under tiled floors. For installation under the screed we recommend selecting the 200W kit
  • Max temperature 28 degrees
  • Protection rating IP68
  • 5m cold tail length
  • The system comes with a lifetime warranty plus a 3 year warranty on thermostats
  • Made in Germany
  • View product specifications here

Running Costs

One of the biggest misconceptions about electric underfloor heating is that it is expensive to run. However, electric underfloor heating in a medium sized bathroom costs less to run that an average takeaway coffee a week!

Due to the fact that hot air rises, underfloor heating is a very efficient way of heating your home. Underfloor heating provides a gently, comfortable radiant heat rather than circulation hot therefore the room is comfortable at a lower temperature than other heating methods.

Greater efficiency can also be achieved by including by:

  • Including a layer of insulation
  • Splitting the heating into different zones
  • Using a programmable thermostat to only have the heating on when you need it

So how much will it actually cost me?

Unfortunately there is no straight answer for this. There is a number of factors that will influence the efficiency and the running costs of your underfloor heating. This includes:

  • The set temperature
  • The size and design of the room/home
  • Level of insulation
  • External temperatures
  • Flooring products used
  • Your electricity tariff
  • Length of time the floor heating is on
  • If there is any other heat sources in the room

To get an estimated running cost use Thermogroup's running costs calculator.


What is the difference between Thermonet 150W and Thermonet 200W, and which system should I choose?
The difference between Thermonet 150W and Thermonet 200W is simply the wattage per square metre, and the application for which they are used. The Thermonet 150W is designed to be installed directly under tile, just in the tile adhesive, whilst the Thermonet 200W is designed for installation beneath a screed as the higher wattage makes it more effective in heating through this screed.

Can Thermonet 150W be installed below a screed?
Thermonet 150W is designed to be installed above the screed, just in the tile adhesive. It is suitable to be installed in screed up to 20mm thick but for screed more that 20mm thick (most instances) an In Screed Heating system such as our Thermonet 200W is required.

Is Underfloor Heating safe to be installed in the shower?
Providing that the shower floor is tiled (not a shower base) like the rest of the bathroom floor, all of Thermogroup’s underfloor heating systems are suitable for installation in the shower area.

The cable has an IP (Ingress Protection) rating of IP68 and a continuous earth braid the full length of the cable. This ensures it is safe should the cable come in contact with water and gives you the assurance of safety in the unlikely event of install damage. For further protection we recommend that you do not end the heating system in the shower area.

Can Underfloor Heating be installed up the side and on top of a shower seat?
All Underfloor Heating cable must be covered by a cement-based product and cannot operate in a void. Therefore, provided that the shower seat is tiled like the rest of the bathroom and all cable is covered by a cement-based flexible tile adhesive, then it is perfectly safe to install the heating on a shower seat.

Should Underfloor Heating be installed below or above the waterproofing?
To ensure a fully waterproof substrate it is recommended to lay the floor heating over the waterproofing. In a screed application, where the waterproofing is on top of the screed, an in screed system can be laid before the waterproofing.

What are the rough in or first fix requirements for Underfloor Heating and a Controller?
When roughing in for our Underfloor Heating and the controller, the electrician will first need to bring mains power to the Thermostat location. The electrician will then also need to run two 20mm conduits from the Thermostat position down to the floor, for the Underfloor Heating Cold Tail and for the Floor Sensor

What's In The Box

Thermonet 150W/m² Mat
Programmable Thermostat
Floor Temperature Sensor
Sensor Conduit
Cable Monitor
Installation Guide & Warranty Form