Underfloor Heating Plus – Specialists in the Supply, design and installation of Raychem Electric Underfloor Heating systems

Electric underfloor heating Vs Water underfloor heating

Electric underfloor heating vs water underfloor heating

 There are several differences between electric underfloor heating vs water underfloor heating. The main differences are:- 

1. Installation cost.

  • Electric Underfloor Heating is cheaper to install than water underfloor heating.
  • It is suitable for use directly under virtually any floor covering, assuming the correct system is installed, (for example Raychem T2 Red and T2 Reflecta is suitable for wooden floor coverings). This  makes it ideal for both renovation projects and new builds.
  • Water underfloor heating has a higher initial cost as it requires specialist tools and is much more labour and material intensive. Insulations, pipes, concrete screeds, manifolds, electrics and a boiler all need to be considered.
  • When using water underfloor heating, the depth and weight of screed must be considered. Electric underfloor heating is ideal for renovations, especially Raychem T2 Quicknet which has an ultra-thin 3mm mat and can be laid directly in the filler or tile adhesive.
electric underfloor heating vs water underfloor heating

Raychem T2 Quicknet

electric underfloor heating vs water underfloor heating

Click to enlarge










  1. Response Rate.
  • Electric Underfloor Heating, with suitable insulation installed, can provide a rapid response heating system.
  •  Water underfloor heating can take several hours to reach the desired temperature and is designed to be left on at a set temperature. Electric underfloor heating temperatures can be adjusted to suit your requirements.


  1. Running cost.
  • Electric and Water Underfloor Heating comes in several different forms and systems, so a direct comparison is virtually impossible. However both can be run very economical when installed with suitable insulation. Raychem T2 Red combined with T2 Reflecta can provide 20% extra energy savings through integrated insulation.
  • If you are using a gas boiler then the water underfloor heating system should cost roughly the same to run as a radiator system.
  • Raychem T2 Red and T2 Reflecta systems are difficult to provide an accurate running cost for as the intelligent design of the system means that power output will decrease when alternative heat sources are detected (e.g. sun shining onto the floor through a window, rugs laid on top, other electrical sources of heat).

However as a rough guide:- T2 Red and Reflecta uses 10W/m x room size (m2) x 10 (metres of cable used) = KW Number of hours underfloor heating is set on the thermostat x 30 = average monthly useage. KWh


Electricity price (KWh)

= KWh x pence

Divide by 100 = cost to run per month.


So to put some figures to this…

10(W/m) x 10(m2) x 10 (metres of cable) = 1000 Watts or 1 KW.

6 hours per day x 30 = 180

180 x 1 = 180kWh

x 9.87 (example electricity price in pence per KWh)

= 1776.6

÷ 100

= £17.77 per month.

  1. Maintenance.
  • Electric Underfloor Heating requires no maintenance once fitted. There is no yearly servicing and Raychem systems are backed up with a warranty of up to 10 years, or up to 20 years if installed by a ‘Certified Pro’, such as Underfloor Heating Plus Ltd. Water underfloor heating, depending upon the boiler and power source, would typically require yearly servicing / maintenance. 


  1. Cost for electric underfloor heating vs water underfloor heating.
  • Electric Underfloor Heating is cheaper to purchase, cheaper to fit and comparable in running cost to water underfloor heating.


  1. Room Design
  • Complex room shapes can pose quite a problem for wet underfloor heating systems.
  • Raychem electric underfloor heating cables can be cut to length to suit any design of room.
  • Raychem electric underfloor heating mats are designed so that cables can be easily separated from their net to cover all heating areas.