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Electric heating systems

Electricity is currently the most expensive and carbon-intensive heating fuel available in the UK.

Electricity is currently the most expensive and carbon-intensive heating fuel available in the UK. The preferred option for anyone with storage heaters is to replace them with a boiler or heat pump, with radiators or underfloor heating. This can cost a considerable amount to install but can save money in the long term.

It might be worth considering a form of low carbon heating such as a heat pump or biomass boiler. Whilst these can be expensive to install, they can bring large savings on your energy bills and you can also get payments from the government from the Renewable Heat Incentive (RHI). This means a renewable system these may be a cheaper overall, as well as reducing your carbon emissions.

Alternatively you may want to get a gas connection to your home. The company that owns and operates the gas network in your area may be able to help with the cost of getting a new connection, and it may even be fully funded. Contact them for further information.

A new gas boiler will typically cost around £2,300 plus the cost of the radiators, but you could cut the cost of your heating bill by nearly half and save by around £560 a year.

If you don’t have a gas supply to your house but it is available nearby, you may be eligible for a grant towards the cost of having a connection put in. 

If you decide to keep your electric heating then it could be beneficial for you to upgrade your heaters. 



How can I upgrade my electric storage heaters?

If you cannot install a whole new central heating system, then you could install new heaters with better heat retention and improved controls. New storage heaters can be quite pricey, but can be cheaper to install than central heating, and you don’t have to replace them all at once.

Fan-assisted storage heaters

Modern slim line fan-assisted storage heaters are better insulated, so are more able to store heat - that can be used when you need it, rather than leaking heat constantly throughout the day. Their heat output is more controllable, so you can heat a room up faster or keep it cool if you’re not using it. They vary considerably in price, but expect to pay around £700 each. 

Automatic charge controls

Modern controls on storage heaters allow you to set a thermostat so that the heater switches off when it has reached a certain temperature. A heater with automatic charge controls will automatically control how much heat it stores overnight, depending on the heater's internal thermostat as well as changes in daily weather patterns. 

Celect-type controls

A system with Celect-type controller will monitor heaters in all rooms and automatically control how much heat is stored or released in different rooms.

High heat rentention storage heaters

These are storage heaters that are able to retain more heat than other models. This means that less heat is wasted throughout the day and more heat should be available when it is needed, for example in the evening. 

These storage heaters will come with Celect-type controls. 

Finding an installer

You should always use a qualified electrician to fit or replace storage heaters. 

In England and Wales you can use the Competent Persons Register to find an electrician who is registered with a Government-approved accreditation scheme. 

In Scotland you can use the trade association for the electrical industry, SELECT, has a 'find a contractor' search engine so that you can find a SELECT electrician in your area. SELECT members follow the associaton's code of practice to ensure high quality customer service. 

Is replacing storage heaters a DIY job?

Replacing storage heaters is never a DIY activity as the heaters need to be wired into their own electricity circuit in your home. 

How should I use the controls for storage heaters? 

If you cannot replace your storage heaters right now, then you need to use the controls effectively to keep warm without wasting energy and money.

Electric storage heaters use off-peak electricity to ‘charge up’ overnight and then release heat during the day. 

A standard electric storage heater has two controls - an ‘output’ setting and an ‘input’ setting. The output setting will control how much heat is given out (as long as there is stored heat available). The input control determines how much electricity the heater will take from the grid during the coming night, and hence how much stored heat will be available the following day. 

So you need to set the output dial according to how much heat you want now, and the input dial according to how much heat you think you will need tomorrow. If a heater runs out of heat in the evening while you still need it, or if the weather gets colder, you may need to turn the input dial up. If the weather gets warmer, or the heater never runs out of heat in the evening, you can probably save money without getting cold by turning the input dial down.

Turn the output dial to zero before you go to bed or go out, so you’re not wasting energy overheating empty rooms. You can do this about an hour before you go to bed, as it will take a while for the heater and room to cool down.

When summer comes and you don’t need the heaters any more, turn them off at the wall, not just by turning the dials to zero. You will need to turn them on again the day before you need the heating to come back on.

Room thermostats

Similar to a central heating room thermostat, a room thermostat helps keep rooms at a comfortable temperature. When the air around the thermostat dips below a set temperature, the storage heaters will release heat until that temperature is reached.

Room thermostats need a free flow of air to sense the temperature, so they must not be blocked by curtains or furniture, or put near heat sources. 

Your room thermostat should be set to the lowest comfortable temperature - typically between 18 and 21 degrees.

How should I use the controls for an electric water heater?

Cylinder thermostat

Your hot water is stored in a cylinder, and the thermostat prevents it becoming hotter than necessary. Once the water has reached the temperature you have set, the immersion heater will switch off. 

Cylinder thermostats are usually fitted between one quarter and one third of the way up the cylinder. They have temperature scales marked; you should set it at between 60 and 65 degrees.

Time switch

A separate hot water time switch will let you heat the right amount of water at the right time, and take advantage of off-peak Economy 7/10 tariffs. By signing up to one of these tariffs, and setting the timer to heat water at a cheaper, off-peak rate, you will use less electricity and save money.  

Set your water to heat up only when you need it. The better insulated your tank, the longer your water will stay hot.

Boost switch 

Most systems have a second, smaller heating element at the top of the immersion cylinder, activated by a boost switch. Use this to heat a small amount of water at expensive peak times during the day.

Need advice?

If you're based in England or Wales please contact the Energy Saving Advice Service on 0300 123 1234.

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