FlexHeat Cable Running Cost Information

FlexHeat Cable converts electricity into heat with almost 100% efficiency, so the running costs of a system depend largely on the room’s insulation and the target temperature.

The better insulated a room is the less expensive it will cost to operate the underfloor heating system, with the largest benefit being obtained in installing thermal insulation boards directly beneath the FlexHeat Cable itself.

When installing FlexHeat Cable at an output of 150W/sqm onto a well-insulated floor, we would expect the underfloor heating system to operate on average for less than 40% of the time to provide a total heating system. With electricity costs of 10 pence per kilowatt hour this would lead to running costs of around 0.6 pence per hour when the heating system is running.

Assumptions made for the above calculations:

The FlexHeat Cable has been installed at an output of 150W/sqm.
The cable is installed on top of 10mm thermal insulation board, beneath standard ceramic tiles.
100% of the floor is covered with underfloor heating.
The insulation in the property is up to the current Part L regulations.
The price for electricity is an average of 10p per kilowatt hour.
The system is run via Heat Mats Part L Compliant 4th Generation NGT thermostat, with the anticipatory setting enabled.
The system is operating while the average ambient temperature is 10oC, and the system is heating the room on average for ten hours a day.