Costs of Running an Electric Boiler

Summary of electric boiler running costs
Price range = £1,600 to £1,890
Average cost = £1,745 per year
Best/cheapest price = £1,600

Related Guides: Boiler Replacement Cost

An electric boiler can be a good choice if you need to replace an old gas or oil fuel boiler. They are cleaner and you don’t need to worry about putting a tank for oil storage somewhere in the yard or underground. Electric boilers come in a range of different sizes that are small enough to fit in a kitchen or laundry cupboard. Electric central heating will save you kilograms of carbon each year and if you have a water storage tank with your boiler you can take advantage of lower electricity prices at off-peak rates.  At just 9pence per kW compared top standard rates of over 15 pence per kW. (EST)

Boiler prices

Do you need a new boiler for your electric central heating? You can get one as cheap as £1000 if you are just swapping your old boiler for a new boiler. If you need it moved and it involves extra plumbing and new wiring it will cost you more money. If you want a top of the range boiler for around £2000 it can cost up to another £2000.

The average price of an electric Combi boiler is £1500 for a 9kW model. Larger models can cost up to £2500. Usually only people with no access to oil or gas would opt for electric central heating. But nowadays many other people are recognising the environmental and cost benefits of installing an electric central heating boiler.

What types of electric boilers are available?

There are several manufacturers of electric central heating boilers in the UK that make models ranging from 4kW to 14.4kW. The smaller kW boilers are cheaper to buy and run but may not be as efficient as larger model.

  1. Heatrae Sadia makes the ElectriMax Electric Combi Boiler that is small and compact and easily fits into a standard sized laundry cupboard. Comes in different sizes. A 9kw boiler is around £1580 including VAT whereas a 2.5kW boiler is £692 including VAT

  2. Electric Heating Company offers a range of electric boilers for central heating from 6kW to 14.4kW that do not need to have a flue installed. These can also be adapted to produce hot water.

  3. Thermaflow Electric Boilers range from a small and compact kitchen cupboard sized electric combi boilers to larger and heavier stainless steel electric combi boilers.

  4. Trianco Electric Boilers are available in five output sizes ranging from a small 2kW to a larger 12kW. These boilers can also be linked to create a larger output if it is required.

Electric combi boiler running costs

  • According to Which? It will cost you an average of £1800 a year to use an electric combi boiler to supply hot water and heating for your home depending on the size of the boiler

  • with the average prices of electricity per kW hour say the boiler running costs for a 210 litre Thermaflow electric combi boiler is £2025. This is based on a total of 13500kW at 15 pence each kW.*

* This is based on the electric boiler being used on maximum for heating and hot water in autumn and winter and only for hot water in spring and summer.

*Sources: Energy Saving Trust, Heatrae Sadia, Electric Heating Company, Thermaflow, Trianco. All information is accurate as of January 2012

Rod says:

A lot of information, but double dutch to the layman. what does 210 litre flow mean.
Most people want to know how much it would cost to heat a certain amount of radiators plus hot water for different size families. What size boiler would one need. I couldn’t tell whether it stored hot water off peak for distribution high peak, or if it worked the same as a gas boiler via a thermostat / timer.
Regards Rod

ablyth says:

Hi Rod,
You might be interested to know that Which? found that running an electric boiler in a three-bed semi-detached, well-insulated home cost on average £870 a year in comparison to gas; which cost £490.
This info is included elsewhere on this site but I’ve now included it in this article too in response to your feedback.

Rod says:

Hi Ablith
Yes it does, but it is for a combi storage and not just a straight forward instant hot water and heat to radiators,which is the type I was investigating.

Susan says:

Am looking for electric boiler and cylinder replacement in two bed bungalow with very easy access to pipework ect.Apreciate any help advice re most energy and cost efficient .Thank You. Sue.X

ablyth says:

Hi Sue, to get specific quotes for your boiler replacement, simply fill in this form and a boiler engineer will contact you to provide advice and a no-obligation quote.

Martine Webb-jenkins says:

We have an lpg boiler at the moment and were considering installing solar panels and switching to an electric combo boiler to save money.
Thanks, Martine

ablyth says:

Hi Martine, installing solar panels can be a great way to save money, if you’d like more info on how much this could cost, check out our solar panel cost guide. You can get free quotes specific to your project by filling out this form.

Christine says:

Hi..husband and I live on s coast near portsmouth. House is 12 yr old terrace….have gas central heating and water boiler..and gas hob..but husband hates gassy smell…even though system is safe..and flu discharge. Can we have gas sealed..and change gloworm gas boiler for electric one…we would go electric with cooker too.
If we exchanged boiler are we correct in thinking there would be no dis ruption with central heating piping as it is?

ablyth says:

Hi Chris, sounds like a detailed project – to get specific quotes and advice from a Gas Safe registered boiler engineer in Portsmouth, simply fill in this form and an engineer will be in touch.

Miten Patel says:


We are considering replacing a Powermax gas combi. This stems from the new flue access panel requirements and ongoing issues with the Powermax. The option is to fit another like gas combi or an electric boiler. The boiler will feed the existing radiator based central heating and direct fed showers in two bathrooms. Aside from heating costs, what are the pros and cons of replacing with an electric boiler. One concern is having to wait for water to heat up if the heated store runs out as opposed to a gas combi which will heat as the water flows ?

ablyth says:


Yes, the main disadvantage of heating with electric is that is costs substantially more than gas does; in terms of maintenance, you’ll need to regularly service both a gas and electric combi-boiler. If you choose a good quality electric boiler that is powerful enough to meet your household hot water needs than it should perform as well as a gas combi boiler. For more specific advice from a boiler professional, fill in this form and someone will give you a call to discuss your project.

shaun mcguire says:


Currently have floor standing Range Powermax 155x boiler (16.4kw nominal output) 11-12 years) old in 2bed flat well iinsulated, 1 shower/1 bath. No major problems. Due to the new legislation etc we are aware that we should probably think about alternative solutions nspeci what with i)inspection hatches, gas replacement and other annual maintenance costs and ever changing legislation.

It currently gives mains-pressure hot water showers and rapid bath filling. Not sure if we need a thermalstore as i hear an electric combi can achieve same without store.

Central heating demand are minimal, the thermal store tends to throw off heat and it cant escape anywhere except the flat! Not so good in summer.

We are looking for a reliable, maintenance free (as possible),efficient replacement or solution to get round this flue/gas burning issue.

Are there any other solution maybe involving fuel cells which are in the market? Which utilize the gas safely without the hazardous products?

If you could give say 3 solutions with an estimate that would help us decide whether to bite the bullet or spend to meet the new regs on gas/flues.

ablyth says:

Hi Shaun,

Sounds like you need some advice from a qualified Gas Safe engineer – if you fill in this form a professional in your local area will give you a call to discuss your needs and provide a no-obligation quote.

Bernard says:

I live in a bedsit with bathroom and kitchen. At present I have hot water for my bath/shower, basin and sink provided by an immersion heater in the water tank. I want to get rid of the water tank and airing cupboard and wonder if there is a suitable electric combi boiler for me.

ablyth says:


Sounds like you’d be fine with an electric combi boiler – there are many brands and sizes to choose from. For specialist advice, fill in this form and a boiler engineer in your local area will contact you.

Andrea says:

Hi, I have a Johnson and Starley warm air unit that has two functions. One to heat the water and separately for warm air heating. After recent issue, we now have a emersion heater for the hot water. I would like radiators but due to concrete floors, would need pipes run up the walls.
I understand an option would be to have an electric boiler (is this different to an elec boiler combi?) and electric radiators, so no pipework needed? Any
I live in a split level maisonette that includes an 18ft living room and two double bedrooms.
Thank you

ablyth says:

Hi Andrea,

There are a few options – to discuss this further with a qualified boiler engineer in your local area, please fill in this form and an engineer will contact you for advice and to provide a free, no-obligation quote.

Ollie says:

We have recently had solar panels fitted and they are performing well. This has caused me to think about my Central Heating. We have a 20 year old Ideal Mexico super RS80 gas boiler which has given us no trouble but I feel that we need to update and was wondering about an electric boiler instead. What are my options?

ablyth says:

Hi Ollie, there are many different types of electric boiler to choose from; to get advice catered specifically to your property, please fill in this form and a qualified boiler engineer from your area will contact you to provide free advice/quotes.

gerard says:

Our LPG boiler just broke down and so researching options. We dont have mains gas in the area, so we are looking at Elecrtic. Everyone seems to be against it. But we live in old stately home with 16 radiators and pay a staggerring £270 a month for LPG. Surely it wouldnt cost more…or would it? Some advice please!

ablyth says:

Hi Gerard,

Latest figure from Which? show that the average annual fuel cost for LPG central heating and hot water is £1,300, while the average annual price of electric heating and hot water is £1,700. However, as I’m sure you’re aware, you will need to take into account the cost of getting oil delivered as well as the cost of the boiler and professional installation. I would advise talking to a boiler professional in your area; since you live off the gas mains in what sounds like a hard to heat property, you could be eligible for a grant towards the cost of installing a new boiler/central heating system. Please fill in this form and a boiler engineer in your local area will be in touch to provide advice and a free quote.

Cath says:

I currently have storage heaters in my two bed roomed flat and would like to install a central heating system, there is gas running into the building so this is an optional thought would have to also install a pump to give my shower better water pressure, although my engineer also said to look into an electric combi boiler, these are obviously a lot more expensive to buy so is it worth it??

ablyth says:

Hi Cath, an electric combi boiler might be cheaper to install than a gas central heating system; but in the long-run it costs a lot more to heat your home and domestic hot water supply with electric than it does to use gas. To get more specific advice from boiler engineers in your local area and free no-obligation quotes to help you decide what to go for, please fill in this form.

Baz says:

Cath, it would probably be best to go for simple panel heaters that cost around £25 each – they come with thermostatic and timed control. As you would have a very simple ‘system’ your extra running costs (electric over gas) will almost certainly be levelled out. Little account is taken of the costs of repair and replacement of gas CH, let alone the installation cost! For your HW I’d go for a simple immersion heater (on a timer). You could have a pump, though you could also go for a mains-pressure unit. This would give you masses of HW at mains pressure for about 60p a day.

craig says:

Hi Ablyth,

Like gerard, I am off the mains gas, can you provide me with more details of the grants available to install a central heating system?


ablyth says:

Hi Craig, since you live off the gas mains it’s likely that you’ll be eligible for a grant towards the cost of a new heating system. To get specific advice, please call the Energy Saving Trust on 0300 123 1234, they will be able to tell you what you’re eligible for and help you apply.

cass says:

We currently have a large wood burning stove that heats our hot water tank and 5 rad’s in an open vented, gravity fed system. But i am now looking to supplement it with an additional boiler system but I’m unsure about what products are out there that can do this. As a layman looking into it, it seems like it could be a very costly and complicated task. Is it possible to simply add a basic electric or gas boiler to such a system simply to top up the water temp and supply the rad’s when the stove is out? and if so which would be the most cost effective and efficient?

ablyth says:

Hi, to get free advice from a qualified boiler engineer in your area please fill in this form and someone will contact you as soon as possible.

Mike says:

I am currently on oil.
We have gas in the village, which would need to be connected to the property.
I am in a small bedroom cottage 3 beds. I don’t want a gas flue onto the road if I can help it.
Can you please advise on the costs of gas versus electric combi boilers and the pros and cons of each system.
Many thanks,

sdeshmukh says:

Hi Mike,
Sounds like you need some advice from a qualified Gas Safe engineer – if you fill in this form a professional in your local area will give you a call to discuss your needs and provide a no-obligation quote.

Carlo Ziccarelli says:


We have an old gas combi boiler in the bedroom and we’re thinking of replacing it with a new one to be put in the kitchen. Quotes for installation seem really high, so I’m thinking about alternatives. Are electric boilers easier and less expensive to install?

Thanks, Carlo

sdeshmukh says:

Hello Carlo,
The think you have been quoted high because you want to shift it from your bedroom to the kitchen. For long run I suggest gas boiler because the running cost for electrical boiler is higher than the gas boiler even if the installation is cheap.
Hope it helps.

jan harrison says:

hi we are currently on lpg but due to the costs and difficulty getting gas if it snows we are looking to change to a log burner in the lounge and a electric combi boiler for the radiators, we have an emersion heater for water. We live in a small 2 bed cottage, ( at present we have 4 radiators we use and 2 more we dont) can you give me any idea about what this would cost to install please


sdeshmukh says:

Hi Jan,
Sounds like you need a professional advice. Just fill in this form explaining your issue and a boiler engineer will contact you to provide advice and a no-obligation quote.

Kevin White says:

we are buying a 2 bed bungalow and there is no gas in the village we are looking at installing an electric boiler and a wet radiator system , we would like some advise on this


sdeshmukh says:

Hi Kevin,
We can try to help you out. To get specific advice and UP TO 4 free no-obligation quotes from boiler engineers, please fill out this form. We aim to provide free quotes to all our consumers but sometimes it depends on the availability of the boiler engineers and the location of the consumer. If we are unable to match you with a local engineer, you may find our cost guide useful.

Margaret says:

I need an Electric Combi Boiler that will do my central heating and hot water without a storage tank or header tank. I am being told there is no such thing, is this true?

samrat says:

Hi Margaret,
We are aware that they do exist but there is a very small demand in the market. You will have to research a bit on the internet to find an local engineer who can install it for you.

Samantha says:

I’m currently looking into which is the best system for my dad, he lives remotely so no gas, due to access issues, he can’t have oil delivered. At present he has no heating except an electric oil filled radiator, and an emersion heater for hot water. The house is very cold, I would like a central heating system fitted, but need to consider my options carefully, whether it be multi fuel or do I consider an electric boiler? He is 79 years old and doesn’t want to move, are there any grants to help? Which system would be the least expensive, as he only has his state pension and pension credit.
Any advise would be good, would solar panels actually run a electric boiler system with radiators? How much would they cost to install, run etc.
Anyone help??

mjackson says:

Thanks for posting. we suggest speaking to the local council for your father area as they are the best to advise in regards to grants. You can also try the Energy saving trust website which also has useful information when thinking about heating grants.
Should you discover that a grant isn’t available please feel free to complete our online form and we will try and match you with up to 4 local contractor who will contact you to give you a free no obligation quote on the work you need doing.
We do hope that this information helps.


Lesley says:

We have purchased a run down house in a semi rural position. No mains gas. Previous owners had oil central heating but the tank is ancient and in an illegal position so we have to move it. We want a clean system and so are investigating an electric combi boiler but the heating engineers who have quoted for an oil system have never heard of electric combi boilers. We were also thinking of having solar thermal panels fitted. Can anyone give advice and are there any grants available?

mjackson says:

Hi Lesley,
Thanks for your post.
We cannot guarantee that our service professionals will be able to advise on grants therefore we suggest taking a look at the Energy saving trust website where you can find further information on any grants you may be considered for.
Should you find that you aren’t , please feel free to fill in our boiler form and we will be aim to match you with up to 4 local companies who will contact you to arrange free, no obligation quotes on any work you need doing.

We hope that this information helps.

Mark @ ServiceMagic

gibbon says:

Given that the power of the boiler in kW determines how fast the water can come out of the tap and still be hot, and that gas boilers for instant hot water are in the 20kW region (which would be more than many home electric supplies will take) be prepared to be very disappointed when trying to run a bath with a low end electric boiler. Maybe try these for central heating and use an immersion heater and/or electric shower (for use when the boiler isn’t on…) if you are stuck with electricity only.

Bernard says:

Hi I have a gas combination boiler in a three bedroom house my current heating bill is £1300 per year dual fuel what would my bill be using an electric combination boiler using approx same use in a year ?

mjackson says:

Hi Bernard,

Thanks for your post.

According to Which? It will cost you an average of £1800 a year to use an electric combination boiler to supply hot water and heating for your home depending on the size of the boiler.

Should you wish to obtain free quotes to have an electric boiler installed feel free to fill in our online form and we will aim to match your request with up to 4 local companies who will each contact you in order to arrange an appointment to quote.

Thanks again for your post and we hope to be of further assistance in the future.

Mark @ ServiceMagic

Bernie says:

Hi Mark
According to the extra it will cost me going on Which Electric is a NO NO I will with Gas it sounds so silly Electricity on the Fuel charts cost far less than gas and I can,t see anyone buying Electric Boilers so seems a waste of space manufacturing them

Regards Bernie

mjackson says:


Thanks for your post.

We would recommend searching for your local environmental health office (the council will be able to point you in the right direction) in order to report the noise you are experiencing.

They will then advise on the options you have available.

We hope this helps.

Mark @ Servicemagic

charlie says:

hi can you tell me in laymans terms how much a 12kw heatrea sadia amptec will cost to run per year and also how much it costs per hour and how many units of electric it takes per hour thank you – p.s the heater we have got is a 12kw heatae sadia amptec and only heats the house this doesnot heat the water

mjackson says:

Hi Charlie,

Thanks for your post.

Please feel free to fill in our online request form and we will aim to match you with up to 4 local contractors who will call you in order to arrange a convenient time for them to visit you and provide you with a free quote.

We also have a cost guide should you wish to get an idea of price without having to speak to a contractor.

We hope this helps.


rosemary says:

We are going to have to install a new boiler. Gas is not available which is cheaper oil or electric. Thanks

mjackson says:

Hi Rosemary,

Please feel free to fill in our online request form and we will aim to match you with up to 4 local contractors who will call you in order to arrange a convenient time for them to visit you and provide you with a free quote.

Cheryl says:

Hi, we have just brought a property that is very rural and has no access to gas. It currently has a very large oil tank that is quite unsightly in the garden. We are building a two storey extension on the house and trying to weigh up whether its a good time to change the oil to Electric. Are you able to tell me if Electric is going to be cheaper than oil? what are the benefits of converting to all electric?

Many Thanks

mjackson says:

Hi Cheryl,

Thanks for your post.

It would be hard for us to advise as we aren’t specialists however we would recommend contacting a company directly who would be able to advise better.


Hi after some info just bought a house which has no heating system no gas on street
only calor for hob and electric cooker
There are no raiders in house but has a back boiler looking to my be get a electric combi ?

mjackson says:


Thanks for your post.

Please feel free to fill in our online request form and we will aim to match you with up to 4 local contractors who will call you in order to arrange a convenient time for them to visit you and provide you with a free quote.

Steve Denton says:


Recently moved into a large bungalow in the country. Everything is electric. We have under floor heating using a wires. Any hot water we have is via an immersion heater in the cylinder. Would it be sensible to get an electric boiler installed purely to heat the water?

Iain w mountain says:

Hi,just bought a cottage in a village where no mains gas available.the night storeage system has been removed and only other option is oil. We have decided to install a solar system 1.92 kW and would like your advice on water heating system to use please. We are also installing a multi fuel burner into the kitchen for heating.

Kev says:

Hi We have a 3 bed semi with solar panels fitted. We currently have gas central heating/water boiler and cylinder and a storage tank in the attic. We were considering changing our current gas boiler to electric because of the solar panels… are the savings good enough to warrant this do you think? and if we went for an electric boiler can we then get rid of the damn cylinder to save space? We would also want to re-site it so does it require a flue? or can it be fitted without?

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