Last Updated on October 15, 2026 by daxom

Are Electric Boilers Better for the Environment?

As the UK moves towards cleaner energy and lower-carbon heating, more homeowners are looking at alternatives to traditional gas and oil boilers. Electric boilers are one option, but are electric boilers better for the environment? You can also explore our Daxom electric boiler range.

The short answer is: they can be, but it depends on how the electricity used to power the boiler is generated and how the heating system is designed and operated.

Electric boilers produce heat without burning gas or oil in your home. This means there are no combustion gases or direct carbon emissions at the point of use. However, an electric boiler uses electricity directly to produce heat, so its overall environmental impact is closely linked to the electricity grid.

The good news is that the UK’s electricity supply is becoming progressively cleaner. In 2025, renewables accounted for a record 52% of UK electricity generation, while coal generation fell to zero following the closure of the UK’s last coal-fired power station in 2024. (GOV.UK)

So, how environmentally friendly is an electric boiler compared with other heating options? Let’s take a closer look.

How environmentally friendly is an electric boiler?

An electric boiler works by passing electricity through an electrical heating element to produce heat. That heat can then be used to provide hot water and central heating, depending on the type of system installed.

Unlike a gas or oil boiler, an electric boiler does not burn fuel inside the property. As a result, there are:

• No combustion gases produced inside the home
• No flue gases from burning gas or oil
• No on-site carbon emissions from fuel combustion
• No need for a gas supply
• No oil storage tank

However, it is important to distinguish between zero emissions at the point of use and zero emissions overall.

An electric boiler still consumes electricity. If that electricity comes from fossil-fuel generation, emissions are associated with producing it. If the electricity comes from renewable sources such as wind or solar, the associated carbon impact can be significantly lower.

The UK’s electricity mix has become substantially cleaner over recent decades. Government figures show that electricity-supply emissions fell by 82% between 1990 and 2025, while nuclear and renewables accounted for 65% of the fuel used for electricity generation in 2025. (GOV.UK)

This means electric heating can become increasingly attractive as the electricity grid continues to decarbonise.

Are electric boilers better for the environment than gas boilers?

For many homeowners, the comparison between an electric boiler and a gas boiler is an important one.

A gas boiler burns natural gas to produce heat. This creates carbon dioxide emissions and other combustion products. An electric boiler does not burn fuel at the property, so it has no direct combustion emissions.

However, comparing the two systems purely on the basis of “electric = green” would be misleading.

The environmental impact of an electric boiler depends heavily on the electricity used to operate it. Electricity generation can still involve fossil fuels, although the UK’s generation mix is increasingly dominated by low-carbon sources. (GOV.UK)

There is another important consideration: energy efficiency and electricity demand.

A direct electric boiler converts electrical energy into heat very efficiently at the point of use. However, this does not mean that it is necessarily the lowest-carbon heating technology available.

For example, a heat pump does not simply convert electricity directly into heat. It uses electricity to move heat from the air or ground into a property. This allows a heat pump to provide several units of heat for each unit of electricity consumed.

The UK Government describes heat pumps as ultra-efficient, while Energy Saving Trust says heat pumps are more than three times as efficient as gas boilers. (GOV.UK)

Electric boilers vs heat pumps

If your primary objective is to reduce the environmental impact of home heating, it is worth comparing an electric boiler with a heat pump.

The technologies work in very different ways.

Electric boiler

An electric boiler uses electricity to heat water directly.

Heat pump

A heat pump uses electricity to transfer heat from an external source, such as the air or ground, into your home.

Because heat pumps move existing heat rather than generating all of it directly, they can produce significantly more heat from each unit of electricity.

This is one reason the UK Government considers heat pumps an important technology for decarbonising heating. (GOV.UK)

However, that does not mean a heat pump is automatically the right choice for every property.

Heat pumps can require suitable space, appropriate heat emitters and good building insulation. Installation can also be more involved than replacing an existing boiler with another compact heating appliance.

The right solution therefore depends on the property, its heating requirements, insulation, available space and the homeowner’s priorities.

Are electric boilers low carbon?

An electric boiler can be considered a lower-carbon heating option than a fossil-fuel boiler in certain circumstances, but the answer depends on the electricity source and the wider system.

Electricity from renewable generation has a much lower carbon impact than electricity generated using fossil fuels.

This is particularly relevant for homeowners who have, or are considering installing, solar photovoltaic (PV) panels.

An electric boiler can use electricity generated by renewable sources, reducing reliance on electricity generated elsewhere on the grid.

However, solar generation and heating demand do not always occur at the same time.

Solar panels generally generate the most electricity during daylight hours, particularly around the middle of the day, while household heating and hot-water demand can occur in the morning and evening.

This is where hot-water cylinders, thermal storage, batteries and smart controls can potentially make a difference.

Can solar panels power an electric boiler?

Yes, solar panels can generate electricity that is used by an electric boiler.

However, installing solar panels does not necessarily mean that an electric boiler will run entirely from solar energy.

Solar PV output varies according to the time of day, season and weather conditions. During periods of low solar generation, electricity will normally need to come from the grid or another energy source.

One way of making better use of renewable electricity is to combine solar PV with appropriate energy storage and controls.

For example, excess solar electricity generated during the day could potentially be used to heat stored hot water, depending on the heating system and controls installed.

This can increase the amount of renewable electricity used within the property rather than exporting it to the grid.

Energy Saving Trust’s current assessment of electric boilers also highlights the potential role of thermal energy storage, solar panels and batteries in making electric boilers more flexible and cost-effective. (Energy Saving Trust)

Do electric boilers use a lot of electricity?

An electric boiler’s electricity consumption depends on several factors, including:

• The size of the property
• The level of insulation
• The amount of hot water required
• The desired indoor temperature
• How long the heating operates
• The efficiency of the wider heating system
• The electricity tariff
• The weather

A poorly insulated home will generally require more energy to maintain a comfortable temperature, regardless of the heating technology being used.

This is why improving insulation and reducing unnecessary heat loss can be an important part of making any heating system more efficient.

It’s also important to distinguish between efficiency at the appliance and overall energy efficiency.

A direct electric boiler can convert electricity into heat very effectively, but it still requires one unit of electrical energy for roughly one unit of heat output. A heat pump can deliver substantially more heat from each unit of electricity because it transfers heat from the surrounding environment.

Energy Saving Trust therefore cautions that electric boilers without storage are unlikely to play a significant role in decarbonising heat because of their electricity demand and limited flexibility. (Energy Saving Trust)

Are electric boilers more environmentally friendly than oil boilers?

Electric boilers can offer environmental advantages over oil-fired heating because they do not burn heating oil at the property.

Oil boilers produce carbon emissions through combustion and require the delivery and storage of heating oil.

Electric boilers remove the need for on-site oil storage and combustion.

As with gas, however, the full environmental comparison depends on the electricity source and the amount of energy required to heat the property.

For households looking to move away from fossil fuels, electric heating can therefore be part of a lower-carbon strategy, particularly when supplied by increasingly renewable electricity.

What are the environmental benefits of an electric boiler?

Electric boilers can offer several environmental benefits.

1. No combustion at home

Electric boilers do not burn gas or oil to generate heat. This means there are no combustion emissions from the appliance itself.

2. No fossil-fuel supply required

An electric boiler does not require a gas connection or oil delivery. This can be particularly useful for properties where extending or maintaining a gas supply is undesirable.

3. Works with renewable electricity

Electric boilers can use electricity generated from renewable sources, either through the grid or potentially through on-site solar PV.

4. The electricity grid is getting cleaner

As the UK generates a greater proportion of electricity from renewable and other low-carbon sources, the carbon intensity associated with electricity use can fall.

In 2025, renewable generation reached a record 52% of UK electricity generation. (GOV.UK)

5. Can work with smart controls and storage

When appropriately designed, electric heating can potentially be combined with storage, smart controls, batteries and renewable generation to shift electricity use away from expensive or high-demand periods.

What are the disadvantages of electric boilers?

Electric boilers also have limitations.

The most important is their electricity consumption.

Direct electric heating requires electricity whenever heat is needed. For a property with high heating demand, this can result in substantial electricity use.

This is one reason Energy Saving Trust currently considers electric boilers without storage unlikely to play a major role in the UK’s transition to low-carbon heating. (Energy Saving Trust)

Other considerations include:

• Electricity prices can be higher than gas prices per unit of energy.
• Large properties may have significant heating demand.
• The electrical supply may need to be assessed before installation.
• Renewable generation does not necessarily match heating demand.
• A heat pump may provide more heat per unit of electricity.

These factors should be considered alongside the benefits of electric heating rather than looking at the boiler in isolation.

How can you make an electric boiler more environmentally friendly?

If you already have an electric boiler, or are considering installing one, there are several ways to reduce its environmental impact.

Improve insulation

Better insulation can reduce heat loss and lower the amount of energy required to heat your home.

Consider the condition of:

• Loft insulation
• Cavity wall or solid wall insulation
• Floors
• Windows and doors
• Draught-proofing

A more thermally efficient property needs less energy to maintain a comfortable temperature.

Use renewable electricity

Choosing a renewable electricity tariff can reduce the carbon impact associated with the electricity you purchase.

The electricity market is changing rapidly, so it is worth checking the current details of any tariff rather than assuming that all green tariffs are identical.

Consider solar PV

Solar panels can generate renewable electricity on-site.

While solar generation varies throughout the year, it can be particularly useful when combined with appropriate controls and energy storage.

Consider battery storage

A battery can store electricity generated by solar panels for use later.

This can help increase the proportion of self-generated renewable electricity used within the property.

Whether a battery makes financial sense depends on the individual property, electricity usage, solar generation and tariff.

Use smart controls

Smart thermostats, timers and heating controls can help avoid heating rooms unnecessarily and allow heating and hot-water demand to be managed more effectively.

Consider thermal storage

Thermal storage can allow electricity to be used to produce hot water or heat at one time and used later.

This can be particularly useful where electricity is cheaper at certain times or when renewable generation is available.

Are electric boilers a good choice for UK homes?

There is no single heating system that is ideal for every UK property.

An electric boiler may be worth considering where:

• A gas connection is unavailable or undesirable
• There is limited space for a larger heating system
• The property has relatively modest heating requirements
• A homeowner wants to move away from on-site fossil-fuel combustion
• The system can be integrated effectively with renewable electricity
• Hot-water storage and smart controls are suitable
• The property’s electrical supply can support the required load

For other homes, a heat pump may be a more appropriate low-carbon solution.

The best option should be assessed based on the property rather than simply choosing the technology with the most attractive headline claim.

Electric boilers and the future of UK heating

The UK’s heating system is changing.

Government policy is focused on reducing the use of fossil fuels for heating and increasing the deployment of low-carbon technologies. The Boiler Upgrade Scheme, for example, provides grants towards eligible heat-pump installations in England and Wales. (Ofgem)

At the same time, electricity is becoming increasingly important in the UK’s energy system.

Government data shows that domestic electricity consumption associated with heat pumps more than doubled between 2020 and 2025, demonstrating the growing role of electricity in home heating. (GOV.UK)

This does not mean that every home needs a heat pump or that electric boilers have no role to play.

Instead, it means homeowners should consider the entire heating system: the building’s energy efficiency, the heat source, electricity supply, renewable generation, storage and how the system is controlled.

So, are electric boilers better for the environment?

Electric boilers can be better for the environment than fossil-fuel heating in some circumstances, particularly as the UK’s electricity supply becomes increasingly low carbon.

They produce no combustion emissions at the point of use and can be powered by renewable electricity.

However, a direct electric boiler is not necessarily the most energy-efficient low-carbon heating technology.

Heat pumps can produce several units of heat from each unit of electricity and are therefore generally more energy-efficient. (GOV.UK)

For electric boilers, the strongest environmental case can be made when they are part of a well-designed system that incorporates good insulation, efficient controls, renewable electricity and, where appropriate, thermal or battery storage.

Ultimately, the right heating system depends on your property and individual requirements.

Frequently asked questions

Are electric boilers eco-friendly?

Electric boilers can be a lower-carbon heating option because they do not burn fossil fuels at the point of use. Their overall environmental impact depends on the source of the electricity they consume and how much electricity the property requires.

Do electric boilers produce CO2?

Electric boilers do not produce combustion-related CO2 emissions at the point of use because they do not burn gas or oil. However, emissions can be associated with generating the electricity used to operate them.

Are electric boilers better than gas boilers?

An electric boiler can reduce reliance on fossil-fuel combustion, but the environmental comparison depends on the electricity source and the energy required. The UK’s electricity supply is increasingly powered by renewable and other low-carbon generation. (GOV.UK)

Are electric boilers better than heat pumps?

Not necessarily. Heat pumps are generally much more energy-efficient because they transfer heat from the air or ground rather than generating all the heat directly from electricity. (GOV.UK)

Can solar panels power an electric boiler?

Yes. Solar PV can generate electricity that can be used by an electric boiler. However, solar generation varies, so the boiler may also need electricity from the grid. Batteries, hot-water cylinders and smart controls can help make better use of renewable electricity.

Are electric boilers suitable for every home?

No. The most suitable heating system depends on the size and construction of the property, insulation, heating requirements, hot-water demand, available electrical capacity and the homeowner’s objectives.

Are electric boilers expensive to run?

Running costs depend on electricity prices, the home’s heat demand, insulation, heating controls and how the system is used. Direct electric heating can have higher running costs than some alternatives, so it is important to assess the whole property rather than the boiler alone.

Can an electric boiler help reduce my carbon footprint?

Potentially. Using an electric boiler instead of a fossil-fuel boiler can remove on-site combustion emissions, while using renewable electricity can further reduce the associated carbon impact. Improving insulation and controlling heating demand can reduce energy consumption further.

Choose the right electric heating solution

Electric heating is becoming increasingly relevant as the UK moves towards a lower-carbon energy system.

If you’re considering an electric boiler, it’s important to look beyond the boiler itself and consider the complete heating system. Insulation, heating controls, electricity tariffs, renewable generation and energy storage can all affect both environmental performance and running costs.

At Daxom, we specialise in electric heating solutions designed for modern homes and lifestyles.

Explore Daxom’s electric boiler range to find out more about electric heating and discover whether an electric boiler could be suitable for your home.