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Best Combi Boilers 2024

(6 Items)

Save up to £840* per year and increase your home's energy efficiency by installing a new boiler

With energy prices still high, installing a new boiler can help waste less energy so you can save money on your heating.

* Estimated saving for a gas-heated detached house in England, Scotland and Wales, when replacing an old G-rated gas boiler, programmer and room thermostat with a new A-rated condensing boiler, programmer, room thermostat and thermostatic radiator controls (TRVs). Savings will vary depending on the size and thermal performance of your home. Source: https://energysavingtrust.org.uk/advice/boilers/

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Why does boiler efficiency matter?

A boiler's efficiency relates to the amount of energy it uses when it comes to heating water.

For example, if 95% of the energy used heats the water, this means that 5% is lost, which would represent an energy-efficient boiler. However, a boiler that loses 40% of its energy would not be very energy efficient.

Considering that you pay for 100% of the energy used regardless of how much is wasted, it's wise to ensure your boiler is as energy efficient as possible.

What do boiler efficiency ratings mean?

Boilers are either rated according to the ErP or SEDBUK systems.

ErP is the European rating system for boilers, rating their efficiency from A to G. All UK modern gas boilers are legally obligated to be A-rated - i.e. as efficient as it's possible to be.