Electric radiators running costs

Date of meter reading 

 Meter reading Kw 




 Kw unit per day 


 Electricity price paid 

 9.24p Kwh


 Expense per day 6Kw+ 



Expense per hour 



Expense per

 Kw per hour

 (divided by 6Kw) 

21.01.15 Zero            
21.02.15 1165 31






21.03.15 672 28


£62.09 £2.21 £0.09


21.04.15 793 31 26 £73.28











21.06.15 341 31 11 £31.50 £1.01 £0.04 £0.007
21.07.15 300 30 10 £27.72



21.08.15 289 31 9 £25.77 £0.83 £0.03


21.09.15 527 31 17


£1.57 £0.07 £0.01
21.10.15 840 30 28 £77.61 £2.58 £0.11


21.11.15 1054 31 34 £97.38


£0.13 £0.02




31 £85.93 £2.86


Total 7511 334   693.05 £2.07 £0.09 £0.0136

The mean running costs between 1pence and 2pence per hour


Average monthly running cost per month = £62.25

As you can see above is a real life data chart following heating an entire 3 bedroom semi detached property with six of our latest SlimPro electric radiators. The set up consisted of a combined total of 6000w radiators, programmed to a temperature of 21 degrees, 24 hours a day, seven days a week. The results are impressive to say the least, however it’s important to remember that the running costs are expected to be significantly less, as you have to appreciate that the data above also includes the running costs of additional everyday household electrical appliances. These additional electrical devices consisted of: lights, one television, an electric cooker, electric fridge and a computer. Once the expenditure of these ancillary appliances have been extracted, the performance shown is incredibly economical. 


Confused? I was under the impression that if I run a 1000w Slimpro electric radiator surely it will consume 1kw per hour which is 10p per hour right?


Wrong. While this may be true of other electric heaters, our electric radiators are 100% efficient in transferring electric input to heat output. The calibre of our digital thermostat and timing technology is the most accurate available, capable of measuring temperatures to within a segment of a degree. 


For example: A 1000w Slimpro electric radiator powered by an electricity rate of 10p kWh would cost 10p per hour if it was heating at full power for the entire hour. The next component is interesting, if for example the thermostat is set to 21 degrees, upon the room reaching 21 degrees the thermostat sends a signal which briefly turns off the energy supply. Following this stage the thermostat makes sure that only the precise amount of heat is emitted in order to counterbalance the heat loss of the room. For instance if the room posses a heat loss of 100w per hour then as a result the 1000w electric radiator would consume just 100w of electricity for each hour of heating. If your property is poorly insulated, and posses large single glazed windows etc. then inevitably the heat loss would be greater requiring further electricity to maintain the heat in the room. 


Don’t forget to analyse the latest electricity tariffs and conclude the results for yourself.


Be sure to investigate precisely how much you are paying for your electricity supply, as we have carried out our own independent survey which found that up to 70% of UK properties are paying on average 30% above the most aggressive electricity rates available. We strongly suggest that you undertake a quick analysis yourself to see just how much you could save from your electricity bills. It takes only a couple of minutes online using an energy comparison website. Switching electricity supplier isn’t as complicated as you might think, with many energy suppliers more commonly carrying out the lions share of the leg work in order to obtain your business. All that is required is for you to choose you electricity plan, enter your details and the energy supplier takes care of the rest, it really is as simple as that.


Electric radiator running cost conclusion


Structured on a gradual increase in consumption throughout 2015 the mean expenditure per month equated to just £62.25. It’s fair to say that the running costs of low energy consumption electric radiators have evolved into a bracket of their own. No longer are they seen as costly to run, but reflect the green end of the spectrum, with exciting evidence pointing towards the potential for energy efficient electric radiators to prevail as an even more economic central heating system than traditional gas central heating. IMPORTANT NOTE: The initial energy required to heat up a room will always be greater than preserving a temperature. Consequently routinely switching the radiators on and off is likely to cost more than maintaining a consistent temperature. We recommend setting rooms which are not occupied as often to a lower temperature setting. Please bear in mind that our calculation undertaken in 2015 is intended purely as an example.