How Much Does an Electric Boiler Cost in the London? A Complete Guide for 2025

Why Choose an Electric Boiler in London for 2025?

Electric boilers are becoming very popular in London by 2025. Many homeowners are choosing them over gas boilers because they are cleaner, quieter and easier to install. With energy prices rising and environmental concerns increasing, electric boilers offer a great solution for those looking to save money and reduce their carbon footprint.

How Much Does an Electric Boiler Cost in London?

The cost of an electric boiler in London can range from £500 to £2,500, depending on the size and brand. Installation costs can add another £500 to £1,500. Even though the upfront cost might seem high, electric boilers have lower maintenance costs compared to gas boilers. This can save you money in the long run. For more details on pricing, you can visit The Eco Experts.

Benefits of Electric Boilers

Electric boilers are 100% efficient, meaning all the energy they use turns into heat. They do not need a flue or gas pipe, making them perfect for flats and homes without gas supply. They are also safer since there is no risk of carbon monoxide leaks.

Electric vs Gas Boilers: Which Is Better?

Gas boilers can be cheaper to run if gas prices are low, but they produce carbon emissions. Electric boilers use electricity, which can be more expensive per unit but is cleaner. With more green energy sources being used in the UK, electric boilers are becoming more eco-friendly.

In this guide, we will explore the costs, installation process, and tips for choosing the right electric boiler for your home in London. Whether you are replacing an old boiler or installing one for the first time, this guide will help you make the right choice.

How Much Does an Electric Boiler Cost in London? [Updated for 2025]

If you are planning to buy an electric boiler in London for 2025, it is important to know how much it will cost. Electric boilers have become popular because they are easy to install, clean, and safer than gas boilers. In this guide, we will look at the average costs of different types of electric boilers and compare them with gas and oil boilers.

How Much Does a Combi Electric Boiler Cost?

A combi (or combination) electric boiler is popular because it provides heating and hot water without the need for a separate tank. The price of a combi electric boiler in London ranges from £900 to £2,500. Installation can add another £500 to £1,500. Combi boilers are great for small to medium-sized homes with limited space.

Cost of a System Electric Boiler

A system electric boiler needs a hot water tank to store water. It is a good choice for homes with higher hot water needs. The cost of a system electric boiler is usually between £800 and £2,000, plus installation costs of £600 to £1,800. They offer a balance between efficiency and power for medium-sized homes.

Price of Heat-Only Electric Boilers

Heat-only electric boilers, also known as conventional boilers, need a separate hot water tank and a cold water tank. They are ideal for large homes with multiple bathrooms. The cost ranges from £700 to £1,800, with installation costs adding another £600 to £1,500. While they take more space, they are efficient for large households.

Comparing Electric, Gas, and Oil Boilers

Electric boilers are more expensive to run than gas or oil boilers because electricity costs more per unit than gas or oil. However, electric boilers have lower maintenance costs and are more eco-friendly since they do not produce carbon emissions. Gas boilers can cost between £500 and £2,000, while oil boilers range from £800 to £2,500. For a detailed comparison, you can check The Eco Experts.

Installation Costs for Electric Boilers in London: What to Expect?

If you are planning to get an electric boiler in London, it is important to know the installation costs. The cost to install an electric boiler depends on several factors, such as the type of boiler, your home’s location, and any extra components needed. In this guide, we will help you understand these costs better.

Type of Electric Boiler

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The type of boiler you choose affects the installation cost. For example:

• Combi electric boilers are easier to install because they do not need a separate water tank. Installation costs for combi boilers can range from £500 to £1,000.
• System electric boilers need a hot water tank, which can increase the installation cost to £600 to £1,500.
• Heat-only electric boilers require both hot and cold water tanks, making them the most expensive to install, with costs between £700 and £1,500.

Location and Existing Setup

If your home already has the right pipes and electrical setup, installation costs will be lower. Homes without proper wiring might need electrical upgrades, which can add £300 to £500 to the cost.

Additional Components

Adding smart controls, radiators, or water tanks will increase the cost. For example:

• Smart thermostats can cost around £100 to £250.
• Extra radiators might add £150 to £300 each.

For more details, you can visit The Heating Hub.

Running Costs of Electric Boilers: Are They Expensive in 2025?

Electric boilers are known for being efficient, but their running costs can be higher compared to gas boilers. This is mainly because electricity is more expensive per unit than gas in the London. In this guide, we will look at how much it costs to run an electric boiler in 2025 and share some tips to help you save money.

How Much Does It Cost to Run an Electric Boiler in the London?

The cost to run an electric boiler depends on your home size and how much you use it. On average, electricity costs 34p per kWh in the UK, while gas costs about 10p per kWh.

Example Calculation:
If you have a 12kW electric boiler and use it for 6 hours a day, the daily cost would be:
12 kW x 6 hours x 34p = £24.48 per day
For a month, this adds up to about £734.

In comparison, a gas boiler of similar size would cost about £216 per month to run. This shows that electric boilers can cost up to three times more than gas boilers for daily use. For more details on energy costs, visit Energy Saving Trust.

Tips to Reduce Electric Boiler Running Costs

a. Use Smart Thermostats
Smart thermostats can help you control heating more efficiently. They learn your schedule and adjust the temperature to save energy. Installing a smart thermostat can reduce your energy bills by 10-15%.

b. Take Advantage of Off-Peak Energy Usage
Many energy suppliers in the UK offer off-peak tariffs during night hours. Using your electric boiler during these times can save you up to 50% on running costs. Consider switching to an Economy 7 or Economy 10 tariff for cheaper rates during off-peak hours.

c. Insulate Your Home Properly
Good insulation helps keep heat in, meaning your boiler has to work less. This can save you around £200 per year on heating costs.

Government Grants and Schemes for Electric Boilers in the Uk (2025)

If you are thinking about installing an electric boiler in 2025, you might be able to get help from the UK government. There are grants and schemes that can help reduce the cost of buying and installing an electric boiler. In this guide, we will look at the available grants, who can apply, and how to get them.

Overview of Available Grants for Electric Boilers

The UK government has several schemes to encourage homeowners to switch to cleaner heating systems, including electric boilers. Here are some of the main ones:

a. Boiler Upgrade Scheme (BUS)

This scheme offers grants of up to £5,000 for homeowners who want to replace their old gas or oil boiler with a cleaner option, like an electric boiler or heat pump. It is available for homes in England and Wales.

b. Energy Company Obligation (ECO4)

The ECO4 scheme requires big energy companies to help low-income households improve their energy efficiency. If you qualify, you might get a free electric boiler or financial help for installation.

c. Renewable Heat Incentive (RHI) – Ended in 2022

The RHI scheme ended, but it is worth checking if any replacement schemes offer similar benefits for electric boilers in 2025.

For the latest information on grants, visit the UK Government’s Energy Grants page.

Who Can Get These Grants?

To qualify for these grants, you usually need to:

• Own your home or have permission from your landlord.
• Have an old or inefficient boiler.
• Receive certain benefits for ECO4, like Universal Credit or Pension Credit

How to Apply for Boiler Grants in 2025

Here are simple steps to apply:

1. Check Eligibility: Visit the Energy Saving Trust to see if you qualify.
2. Contact an Approved Installer: Only registered installers can claim the grants. They will assess your home and help you apply.
3. Submit Documents: Provide proof of income, energy bills, and details about your current boiler.
4. Approval and Installation: If approved, you will get a grant voucher or direct funding to the installer.

Best Electric Boiler Brands in London for 2025

Choosing the right electric boiler brand can save you money and ensure your home stays warm and efficient. In London, some brands are known for their quality, efficiency, and reliability. In this guide, we will review the best electric boiler brands for 2025, focusing on Heatrae Sadia, Thermaflow, and Elnur, and explore the pros and cons of each.

Heatrae Sadia: Trusted and Efficient

Heatrae Sadia is a well-known brand in the UK, offering a range of electric boilers known for efficiency and reliability. Their electric boilers are designed for both small flats and larger homes.

Pros:

• High Efficiency: Up to 99% efficient, reducing energy waste.
• Compact Design: Ideal for small London flats with limited space.
• Smart Controls: Compatible with smart thermostats for better energy management.

Cons:

• Higher Price: Costs range from £800 to £2,500, which is higher than some other brands.
• Limited Options: Smaller range compared to other brands.

For more information, visit Heatrae Sadia.

Thermaflow: High Performance and Eco-Friendly

Thermaflow boilers are designed for larger homes and are known for their powerful heating and eco-friendly features.

Pros:

• Energy Efficiency: Uses off-peak electricity to reduce costs.
• Large Capacity: Ideal for homes with high hot water demands.
• Low Running Costs: Efficient use of electricity can lower monthly bills.

Cons:

• Installation Cost: More expensive to install due to larger size and complexity.
• Space Requirements: Needs more space for installation, not ideal for small flats.

Elnur: Budget-Friendly and Reliable

Elnur offers a range of affordable electric boilers that do not compromise on quality.

Pros:

• Cost-Effective: Prices start at £500, making them budget-friendly.
• Easy Installation: Simple setup with existing systems.
• Reliable Performance: Known for durability and steady heat output.

Cons:

• Fewer Features: Lacks advanced smart controls and energy management.
• Basic Design: Simple appearance, less appealing for modern homes.

For details, visit Elnur.

Electric Boiler Sizes and Power Output: How to Choose the Right One?

Choosing the right size of an electric boiler is important for keeping your home warm without wasting energy or money. The size of an electric boiler is measured in kilowatts (kW), which shows how much power it can produce. In this guide, we will explain kW ratings, how they impact efficiency and cost, and share tips to help you pick the best size for your London home in 2025.

Understanding kW Ratings for Electric Boilers

The kW rating of an electric boiler tells you how powerful it is. A higher kW means the boiler can heat more water quickly, making it suitable for larger homes. However, a higher kW also means higher running costs.

Common kW Ratings:

• 6-9 kW: Suitable for small flats or homes with 1 bathroom.
• 9-12 kW: Good for medium-sized homes with 1-2 bathrooms.
• 12-15 kW: Ideal for larger homes with 2+ bathrooms.

How kW Affects Costs:

• Higher kW boilers use more electricity per hour. For example, a 12kW boiler running for 5 hours at 34p per kWh would cost about £20.40 per day.
• Choosing a boiler that is too powerful for your home can waste energy and increase bills.

Tips to Choose the Right Electric Boiler Size

a. Calculate Your Heating Needs

• Measure the size of your home in square meters. A simple rule is to allow 1.5kW per radiator.
• For example, if you have 8 radiators, you will need a boiler of about 12kW.

b. Consider Insulation and Energy Efficiency

• Homes with good insulation need less power. Poorly insulated homes may need a higher kW boiler.
• Installing smart thermostats can help manage energy use more efficiently.

c. Check Your Water Usage

• If you have multiple bathrooms, you will need a higher kW boiler to provide enough hot water.
• Combi boilers with 9-12 kW are good for homes with 1 bathroom, while 12-15 kW models suit homes with 2+ bathrooms.

Choosing Between Combi, System, and Heat-Only Boilers

• Combi Boilers: Best for small homes due to no need for a separate tank.
• System Boilers: Good for medium homes needing constant hot water.
• Heat-Only Boilers: Ideal for large homes with multiple bathrooms.

For more help, visit Energy Saving Trust.

Electric Boilers vs Gas Boilers: Which is Cheaper in 2025?

Choosing between an electric boiler and a gas boiler can be confusing, especially with energy prices rising. In 2025, the cost of buying, installing, and running these boilers can vary a lot in London. In this guide, we will compare the costs of electric and gas boilers, their environmental impact, and which one might be cheaper for you.

Purchase Costs: Electric vs Gas Boilers

Electric Boilers: Cost between £500 and £2,500, depending on the type and power (kW). They are usually cheaper to buy than gas boilers. Gas Boilers: Range from £600 to £3,000. High-efficiency models and combi gas boilers are more expensive.

Installation Costs: Which One Costs More?

Electric Boilers: Easier to install, especially in homes without a gas supply. Installation costs range from £500 to £1,500. No need for a flue or gas pipe. Gas Boilers: Installation is more complex and requires gas-safe engineers. Costs range from £600 to £2,500, including flue and gas pipe fitting.

Running Costs: Which is Cheaper to Operate?

Electric Boilers: Run on electricity, which costs about 34p per kWh in the UK.

• Example: A 12kW electric boiler running for 5 hours would cost around £20.40 per day.

Gas Boilers: Gas is cheaper, at about 10p per kWh.

• Example: A similar gas boiler would cost about £6 per day for the same usage.

Environmental Impact: Which is Greener?

Electric Boilers: Do not produce carbon emissions directly and can be very green if powered by renewable energy sources.

Gas Boilers: Produce carbon emissions, making them less eco-friendly. Newer models are more efficient but still contribute to CO2 levels.

Pros and Cons of Electric Boilers in London

Electric boilers are becoming more popular in London due to their clean and efficient nature. However, they also have some drawbacks, especially when it comes to running costs and power outages. In this guide, we will look at the main advantages and disadvantages of electric boilers to help you decide if they are the right choice for your home in 2025.

Pros of Electric Boilers in London

1. High Efficiency

• Electric boilers are over 99% efficient because all the electricity they use is converted into heat.
• No heat loss through flues, which makes them more efficient than gas boilers.

2. No Carbon Emissions

• Electric boilers do not produce carbon dioxide or harmful gases, making them eco-friendly.
• They are a good choice if you want to reduce your carbon footprint.

3. Easier and Cheaper Installation

• Do not need gas pipes, flues, or chimneys, making installation simpler and cheaper.
• Suitable for homes in London without access to the gas grid.

4. Quiet Operation

• Electric boilers do not have moving parts like gas boilers, so they run quietly.
• Ideal for flats and small homes in busy London areas.

5. Low Maintenance

• Do not require annual gas safety checks.
• Fewer parts mean less chance of things breaking down.

Cons of Electric Boilers in London

1. Higher Running Costs

• Electricity is more expensive than gas, costing about 34p per kWh compared to 10p per kWh for gas.
• Running an electric boiler can be up to three times more expensive than a gas boiler.

2. Limited Power for Large Homes

• Electric boilers have lower power output, making them less suitable for large homes with high hot water demands.
• Typically, they work best for small to medium-sized homes.

3. Power Outage Issues

• Fully depend on electricity, so they will not work during power cuts.
• Gas boilers can still run during power cuts if you have a generator.

4. Carbon Intensity of Electricity

• While electric boilers do not produce emissions directly, the electricity they use might come from non-renewable sources.
• The carbon footprint depends on how green the electricity supply is.

5. Upfront Cost

• High-quality electric boilers can cost between £500 and £2,500, which is comparable to gas boilers.
• Installation costs are lower, but running costs can offset the savings.

Frequently Asked Questions (FAQs) About Electric Boiler Costs in London

If you are thinking about getting an electric boiler in London, you probably have some questions about the costs, efficiency, and how easy it is to switch from a gas boiler. In this FAQ guide, we will answer the most common questions about electric boiler costs in 2025.

1. How Much Do Electric Boilers Cost in London?

• Cost: Electric boilers cost between £500 and £2,500 depending on the type and power (kW).
• Installation: Installing an electric boiler costs £500 to £1,500.
• Running Costs: Electricity costs about 34p per kWh in the UK, making electric boilers more expensive to run than gas boilers.

For more information on costs, visit Energy Saving Trust.

2. How Long Do Electric Boilers Last?

Lifespan: Electric boilers can last 10 to 15 years if maintained properly. Maintenance: They need less maintenance than gas boilers because they have fewer parts. Tips: Regularly check for limescale buildup and clean the system to extend its life.

3. Are Electric Boilers Eco-Friendly?

• Yes, they are eco-friendly!
• No Carbon Emissions: Electric boilers do not produce CO2 or other harmful gases during operation.
• Green Energy: If powered by renewable electricity (like wind or solar), electric boilers can be almost 100% green.
• Consideration: The eco-friendliness depends on the source of electricity. Choosing a green energy supplier makes them better for the environment.

4. Can I Replace a Gas Boiler with an Electric Boiler Easily?

• Yes, you can!
• Easy Installation: Electric boilers are easier to install because they do not need gas pipes, flues, or chimneys.
• Cost: Replacing a gas boiler with an electric one can cost between £1,000 and £3,000, including the boiler and installation.
• Tip: Make sure your home’s electrical system can support the power demand of an electric boiler.

6. Do Electric Boilers Need Servicing?

• Less Maintenance Required: Unlike gas boilers, electric boilers do not need annual gas safety checks.
• Recommended Service: A simple check-up every 2-3 years is usually enough to keep them running efficiently.

Are Electric Boilers Suitable for Large Homes?

• Not Ideal for Large Homes: Electric boilers are best for small to medium-sized homes due to their lower power output.
• Power Limit: Most electric boilers are available up to 15 kW, which may not be enough for large homes with multiple bathrooms.

Can Electric Boilers Work During Power Cuts?

• No, they cannot.
• Reason: Electric boilers depend entirely on electricity, so they will not work during power outages.
• Solution: Consider a backup generator if power cuts are common in your area.

How Efficient Are Electric Boilers?

• Efficiency: Electric boilers are over 99% efficient because all the electricity they use is converted into heat.
• Comparison: Gas boilers are usually 90-94% efficient due to heat loss through flues.