Electric Boiler Guide

While we don’t install electric boilers due to their high operational costs. We specialize in alternatives like air source heat pumps and direct unvented cylinders. Both offer 100% electric solutions & contribute to sustainability.

Electric boiler installation

Electric boilers: The complete guide

Welcome to Master Gas London’s thorough introduction to Electric Boilers. In this guide, we will give you all the important details regarding Electric Boilers. It covers their background, effectiveness, benefits and drawbacks, as well as factors to take into account when choosing one for your property.

Electric Boiler Options

Air source heat pump installation

Air Source Heat Pump

Experience energy-efficient heating with our Air Source Heat Pumps. Unleash comfort and sustainability. Installation included.

Direct Unvented cylinder prices all include installation

Direct Unvented Cylinder
From £1395

Luxury high-pressure 100% electric hot water with our Direct Unvented Cylinders. Installation included for seamless comfort.

About Electric Boilers

Electric boilers used to be ideal for heating water and providing central heating in locations without gas access or viable flue installation options. Electric boilers operate by heating water through an electric element.


Now Air Source Heat Pump installations or Direct Unvented Cylinders are more cost-effective alternatives for your home’s heating and hot water needs.


For information on modern heating solutions like Air Source Heat Pumps and New Boiler Installations, explore our pages for more details.

Get a New Fixed Boiler Quote In Seconds

Efficiency of Electric Boilers

Electric boilers are renowned for their exceptional efficiency, with up to 99% efficiency ratings. They accomplish this efficiency by efficiently turning almost all of the electricity they utilise into heat.


This distinguishes them from gas boilers, which have a lower efficiency rating because they can lose heat through the flue. The higher efficiency does not mean an electric boiler will save you money as electric is more expensive than gas. Electric combi boilers are known to be very expensive to use daily.


Considering your heating options? Explore our pages on New Boiler Cost and Boiler Types for more information on different heating systems.

Pros of Electric Boilers

  • Energy Efficiency – One of the biggest benefits of electric boilers is their energy efficiency.
  • Easy to Install – Easy to install and maintain, as they don’t require a gas supply or a flue.
  • Reduced Carbon Emissions – Electric boilers don’t rely on burning fuel to generate heat for water, resulting in zero emissions that would require a flue for ventilation. 

Cons of Electric Boilers

  • Expensive to Run – The main disadvantage of having an electric boiler is that they are expensive to run on a daily basis in comparison to a gas combi boiler.
  • Low Flow Rates – Electric boilers also have a lower flow rate than new gas boilers, which means that they may struggle to meet high demand for hot water.

The Future of Electric Boilers

air source heat pumps, everything you need to know

Air Source Heat Pumps

The Electric Boiler alternative
100% electric

Things to Consider

vaillant ecotec plus combi boiler

Boiler Size

Make sure you choose a boiler that's the right size for your home and your hot water needs

approved boiler repair visit


Electric boilers require professional installation

electric supply for electric boilers

Electric Supply

Upgrades will be required

cost of electric

Cost of Electric

Consider the cost of electricity in your area, as this will affect how much you pay to run your boiler.

Summary of Electric Boilers

Electric boilers present a practical and energy-efficient solution for homes and businesses that cannot access gas or do not have a viable flue option.


They are user-friendly and straightforward to maintain, making them an ideal choice for properties with restricted space.


Even though electric boilers have a higher efficiency rating, they do have a higher running cost compared to gas boilers. Nevertheless, electric boilers still present a viable option if you have no gas supply or an option for a flue.


Considering the best heating solution for your property? Explore our pages on Hydrogen Ready Boilers and Combi Boiler Conversions for more information on alternative heating options.

Unvented Cylinder Brands We Install...

At Master Gas London, we take pride in installing top quality direct unvented cylinders, including renowned brands such as Heatrae Sadia (Megaflo), Gledhill, Baxi, and Vaillant

Direct Unvented cylinder prices all include installation

Heatrae Sadia (Megaflo)

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Gledhill unvented cylinder installation


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unvented cylinder installations from £1395


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Vaillant uniSTOR direct unvented cylinder installation


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Heat Pump Brands We Install...

At Master Gas London, we excel in installing the very best air source heat pumps, featuring leading brands such as Vaillant, Grant, Worcester Bosch, and Baxi.

Air source heat pump installation


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Worcester air source heat pump installation


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grant aerona 3 air source heat pump installation


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baxi air source heat pump installation


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Master gas london are your trusted partner in all things gas, heating and hot water

A Family Run Business Since 2015

What Our Customers Say...


An electric boiler is a type of heating system that generates heat using electricity rather than fuel. It heats water or provides heating in a building without the use of a chimney to emit emissions.

Electric boilers use electricity to heat a heating element, which then heats water that is circulated throughout the property. The heat generated is in turn transferred to the water in either the heating system or to provide hot water.

Electric boilers have efficiency rates of up to 99% because they almost entirely convert the electricity they consume into heat, producing very little waste. It is important to note that while having a better efficiency rating than gas boilers it does not mean electric boilers are cheaper to run.

The cost of running an electric boiler will heavily depend on the type of tariff you are on. If you are on a high tariff an electric boiler will be very costly to run on a daily basis.

Yes, electric boilers are safe to use. Since they do not burn fuel to generate heat, they do not produce harmful emissions that need to be vented outside through a flue. They also have safety features that prevent overheating and other hazards. The main safety hazard is incorrect installation, the wiring and electrical supply must be done by a qualified electrician.

The lifespan of an electric boiler can vary depending on the model and how well it is maintained. However take note that electric boilers do tend to be sold with low warranty options.

yes, electric boilers can be used to provide both heating and hot water. Some models are specifically designed to provide both functions.