How much does Heat Mat electric underfloor heating cost to run?

It costs less than 10p to run 1m² of standard underfloor heating at full power for six hours. Although some people still expect underfloor heating to be expensive to run, the reality is that both the initial installation cost and the ongoing running expenses can represent great value for money.

An often underestimated factor in calculating your running costs is how well insulated the floor base is. Insulation boards can reduce heat-up times and increase energy efficiency. The faster the heat-up time, the cheaper the system is to run.

High heat-loss areas like conservatories, or rooms with high ceilings, need a more powerful electric underfloor heating system to heat the room. Our 200W systems can provide robust solutions to these problems, when combined with a tiled or stone floor finish.

Our most cost effective system to install, our 6mm In-screed cable, starts from as little as £22 per square metre (incl. VAT) and a colour, touchscreen thermostat.

Our ultra-thin heating mats and cables enable underfloor heating to be installed without increasing floor height, and once fitted there are no ongoing maintenance costs; unlike gas boilers that need regular maintenance and replacing frequently. Our intelligent NGTouch programmable thermostat can learn the heat characteristics of your room to ensure your system runs as efficiently as possible through the changing seasons.

Example running costs:

Room TypeHeated Floor Area m²Heating Hours AMHeating Hours PM Monthly Cost





These figures are based on Heat Mat’s 160W/sqm heating mats laid directly onto 10mm Heat Mat Thermal insulation boards with porcelain tiles above in a property up to the latest Part L Building Regulations. The energy cost of 12.376p kWh is based on Scottish Power's Fix and Save Price August 2019 online deal. Prices are correct as of December 2019. Source –

Basic Assumptions:

  • All calculations are based on an average of 30.2 days per month
  • All calculations are based on a system being controlled by Heat Mat's NGTouch thermostat with the adaptive function set to ‘off’ (improved power consumption could be achieved using this function, but this is not possible to calculate without additional information on the installation)
  • The monthly cost is based on the temperatures in an average winter month
  • An additional heat loss factor of 1.3 has been included for conservatories
  • The target temperature during the 'on' period is assumed to be 21°C
  • The property temperature is maintained independently at 16°C during any 'off' periods
  • The upstairs floor of an average UK house is 45m² and an average 3 bed home is 88m² Source: RIBA Homewise Report