Electric Boiler vs Gas Boiler: Efficiency, Pros & Cost

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Electric boilers and gas boilers are two types of heating systems that can provide warmth and hot water for residential and commercial buildings. Both have their own advantages and disadvantages, and the choice between them depends on various factors such as energy efficiency, cost, and availability of fuel.



Electric boilers vs gas boilers advantages.

Electric Boiler Pros:

  • Environmentally-friendly: Electric boilers do not produce greenhouse gas emissions directly, making them a greener option than gas boilers.
  • Efficient: Electric boilers are generally more efficient than gas boilers, as they do not lose heat through flues or pipes.
  • Low maintenance: Electric boilers require less maintenance than gas boilers, as they have fewer moving parts.
  • Easy installation: Electric boilers are generally easier to install than gas boilers, as they do not require a gas line or a flue.

Gas Boiler Pros:

  • Lower operating costs: Gas is generally cheaper than electricity, so gas boilers can be cheaper to operate than electric boilers in areas where gas is readily available.
  • High heat output: Gas boilers can produce high levels of heat quickly, making them a good option for large homes or buildings.
  • Good for cold climates: Gas boilers can perform well in cold climates, as they can maintain a consistent level of heat even in freezing temperatures.
  • Long lifespan: Gas boilers typically have a longer lifespan than electric boilers, with an average lifespan of 10-15 years.


Is an electric boiler more efficient than a gas boiler?

Electric boiler vs gas boiler efficiency

In terms of energy efficiency, electric boilers are generally considered to be more efficient than gas boilers. This is because electric boilers convert all of the energy they consume into heat, whereas gas boilers lose some energy in the combustion process and through heat escaping from the flue.

Electric boilers also tend to have higher efficiency ratings than gas boilers. A high-efficiency electric boiler can have an efficiency rating of up to 99%, whereas the most efficient gas boilers typically have efficiency ratings of around 90%.

However, the overall cost of heating with an electric boiler versus a gas boiler will depend on a number of factors, including the cost of electricity and gas in your area, the size and type of the boiler, and the insulation and energy efficiency of your home. In some cases, the higher cost of electricity may offset the higher efficiency of an electric boiler, making a gas boiler a more cost-effective option.

It’s important to note that electric boilers are not suitable for every home or heating system, and you should consult with a qualified heating engineer to determine which type of boiler is best for your needs.


electric boiler vs gas boiler


Electric boiler vs gas boiler cost

Boiler Size (kW) Electric Boiler Cost (Approx.) Gas Boiler Cost (Approx.)
40kW £1,500 – £2,500 £1,200 – £2,000
60kW £1,800 – £3,000 £1,400 – £2,400
80kW £2,000 – £3,500 £1,600 – £2,800
100kW £2,500 – £4,000 £1,800 – £3,200
120kW £2,800 – £4,500 £2,000 – £3,500
150kW £3,200 – £5,000 £2,500 – £4,000
180kW £3,500 – £5,500 £3,000 – £4,500
240kW £4,000 – £6,500 £3,500 – £5,000
300kW £4,500 – £7,500 £4,000 – £6,000
360kW £5,000 – £8,500 £4,500 – £7,000


Can an electric boiler replace a gas boiler?

In most cases, an electric boiler can replace a gas boiler for home heating purposes. However, there are a few things to consider before making the switch.

First, you will need to ensure that your home has an adequate electrical supply to power an electric boiler. Electric boilers typically require a high level of electrical power, so you may need to upgrade your electrical system or install a dedicated circuit to support the boiler.

Second, you will need to consider the cost of electricity versus the cost of gas in your area. In some areas, gas may be a more cost-effective fuel for heating than electricity, so it’s important to do a cost analysis before making the switch.

Finally, you will need to consider the specific heating needs of your home. Electric boilers tend to be most efficient in smaller homes with well-insulated walls and roofs, as they can quickly and easily heat the space without losing heat through ducts or flues. In larger homes or those with poor insulation, a gas boiler may be a better choice.


gas boiler vs electric boiler


Which is cheaper to install, an electric boiler or a gas boiler?

The cost of installing an electric versus gas boiler can vary, depending on a number of factors, including the size and type of boiler, the fuel, and the complexity of the installation, as well as labor costs in your area.

Factors Affecting Installation Electric Boiler Cost Range Gas Boiler Cost Range
Type of Boiler $2,000 – $5,000 $1,500 – $3,500
Size of Boiler $500 – $1,500 $1,000 – $3,000
Fuel Type $0.08 – $0.12/kWh $1.00 – $1.50/therm
Energy Efficiency 95% – 100% 80% – 85%
Ventilation Requirements $500 – $1,000 $500 – $1,000
Plumbing and Wiring $1,000 – $2,000 $1,000 – $2,000
Permits and Inspection $500 – $1,000 $500 – $1,000



In summary, choosing between an electric boiler or a gas boiler depends on a variety of factors, including merit, cost, and availability of fuel. It is important to carefully consider these factors when choosing a heating system for your building to ensure it is safe, efficient, and cost-effective.

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