How much does it cost to run electric underfloor heating?

Electric underfloor heating can be one of the most efficient and cost effective methods to heat your home.
In-fact it costs less than 30p to heat an average sized bathroom in the UK (4.4m2) for 3 hours.

Calculate the cost for running electric underfloor heating in your property, below.

Electric underfloor heating running cost calculator

How much does electric underfloor heating cost to run?

Use our running cost calculator below to find out the potential cost of running a ThermoSphere electric underfloor heating system in your home.

Please note, running cost estimations may vary depending on the property, whether you choose to include insulation, your heating management and also the cost of your local energy tariff.

Enter the area of floor space you wish to heat
Regional electricity rates apply
How many hours you will use your underfloor heating
Your estimated running cost per day£

Popular electric underfloor heating systems




How can I lower my running costs?

Adding insulation boards to your floor heating installation

You can cut your running costs by half and improve efficiency by 50% simply by adding insulation boards to your electric underfloor heating installation.

Manage how you use your floor heating

It goes without saying that, the more you use your heating, the more it will cost. It therefore makes sense to only use it when you are using the room. - This technique works great with electric underfloor heating because of its fast warm up times. You can also create your own heating schedule using an electric underfloor heating thermostat so its only active at periods you know you need it or want it most, (for example first thing in the morning, or perhaps just before bed).

Representative example for ThermoSphere 150W Mesh underfloor heating

Representative running costs for a ThermoSphere 150W/m2 mesh system used as a primary heat source in a well-insulated environment.

1 Hour2.1p4.2p8.4p10.5p21.1p31.6p52.7p
2 Hours4.2p8.4p17p21p42.2p63.2p105.4p
3 Hours6.3p12.6p25.3p31.6p63.2p94.8p158.1p
4 Hours8.4p17p33.7p42.2p84.3p126.5p210.8p
5 Hours10.5p21p42.2p52.7p105.4p158.1p263.4p
6 Hours12.6p25.3p50.6p63.2p126.5p189.7p316.1p
7 Hours14.8p29.5p59p73.8p147.5p221.3p367p
8 Hours16.9p33.7p67.4p84.3p168.6p253p421p

This approximation does not imply any warranty or guarantee of energy consumption and/or electricity costs.

The following reasonable assumptions have been made to calculate these approximate daily running costs:

  • System is installed as a primary heat source in a well-insulated dwelling, built to current Part L regulations.

  • 150W/m2 system under a 10mm ceramic tile on 10mm Insulation Board

  • Energy price of 14.05p/kWh (average UK price at time of printing)

  • The system is controlled by an intelligent programmable thermostat with floor sensor

  • Floor temperatures set at 24 degrees Celsius.

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