Recently, many of my friends have been asking about the underground heating cost (underfloor heating cost) , so let’s share the details with you today ~ whether it’s electric underfloor heating or water underfloor heating, the cost will be different due to different factors oh! Here is an example of the cost of installing underfloor heating in the UK.
Materials: £3 to £6 per square foot
Installation: £1 to £2 per square foot
Total cost: £4 to £8 per square foot
Materials: £4 to £8 per square foot
Installation: £1 to £2 per square foot
Total cost: £5 to £10 per square foot
Materials: £4 to £8 per square foot
Installation: £2 to £4 per square foot
Total cost: £6 to £12 per square foot
To summarize， the price per square foot for installing underground heating： Cable underfloor heating < Graphene underfloor heating < Water underfloor heating
Size of area: the larger the area, the higher the cost of materials and labor naturally~
Type of flooring: different floors have different compatibility with underfloor heating and some may require additional preparation or special materials.
Existing heating system: If integration with the existing system is required or a new boiler (for water underfloor heating) is needed, the cost will increase.
Insulation: good insulation is a must for improved performance, which can also add to the upfront costs.
Labor costs: these will vary depending on your area and the complexity of the job.
Control systems: advanced temperature control systems can increase efficiency, but will also add to the initial cost.
Materials: £1,500 to £3,000
Installation: £500 to £1,000
Total Cost: £2,000 to £4,000
Materials: £2,000 to £4,000
Installation: £500 to £1000
Total Cost: £2,500 to £5,000
Materials: £2,000 to £4,000
Installation: £1,000 to £2,000
Total Cost: £3,000 to £6,000
In summary，Typical underground heating costs for a 500 square foot area：Cable floor heating < graphene floor heating < water floor heating
Thermostats and control systems: £80 to £400 each
Insulation: £0.8 to £4 per square foot
Boiler (for water underfloor heating): £1,200 to £4,000 if a new boiler is required
To summarize， additional cost of 500 square feet of area floor heating： Cable floor heating = graphene floor heating < water floor heating
Cable Electric floor heating: Cable floor heating is more energy intensive and generally costs more to run at £1 to £3 per square foot per year.
Graphene underfloor heating: graphene heating film is more energy efficient at £0.3 to £1 per square foot per year.
Water Underfloor Heating: Operating costs are typically lower, £0.50 to £1.50 per square foot per year, especially if combined with a high-efficiency boiler.
To summarize, running costs for a 500 square foot area: Graphene floor heating < Water floor heating < Cable floor heating
1. U-value (coefficient of thermal conductivity)
The U-value indicates the ability of a building element (e.g. wall, roof, floor, etc.) to transfer heat, with lower values indicating better insulation. The unit is W/m²-K and indicates the heat transfer per square meter per kilogram of temperature difference.
Below is a range of U-values common to different types of houses in the UK:
New build homes (modern buildings):
External walls U-value: approx. 0.18 – 0.3 W/m²-K (in line with modern building standards, usually with insulation)
Roof U-value: approx. 0.1 – 0.2 W/m²-K
Windows U-value: approx. 1.0 – 1.5 W/m²-K (modern double or triple glazed windows)
Older dwellings (built in the mid-20th century and before):
Facade U-value: usually higher, approx. 1.0 – 1.5 W/m²-K, especially for those houses without additional insulation.
Roof U-value: approx. 0.5 – 1.0 W/m²-K (if not upgraded)
Windows U-value: usually higher, approx. 2.0 – 3.0 W/m²-K (single glazed windows)
2. Minimum insulation requirements (modern standards)
According to the UK Building Regulations (Part L), new houses must meet certain standards of insulation:
External walls U-value: not more than 0.3 W/m²-K
Roof U-value: not more than 0.2 W/m²-K
Windows U-value: not more than 1.6 W/m²-K
Standard tariff: approximately £0.30/kWh (capped at approximately £0.31/kWh for the period October 2023 – March 2024 based on Ofgem’s energy price cap).
Night-time tariffs (e.g. time-slotted pricing plans): if you choose a time-slotted tariff plan (e.g. Economy 7 or Economy 10), you may be entitled to lower tariffs for electricity used at night (usually between 11pm and 7am), at around £0.10 – £0.15/kWh.
Current price range: around £0.08 – £0.12/kWh (depending on market conditions and supplier). This means that if you use 100 kWh of gas it will cost around £8 to £12.
Energy price cap October 2023 – March 2024: gas prices are capped at around £0.10/kWh according to the latest figures from Ofgem, the UK’s energy regulator.
This article mentions graphene underfloor heating as a relatively new type of underfloor heating that has not become popular in the UK and globally, but is gradually becoming more applicable in China, and is therefore put into the article for a fuller comparison. If you have any questions, please feel free to have a friendly chat in the comments section.
We produce and develop graphene raw materials and graphene applications, with 50 researchers, and are open to working with you to develop customized products.
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