New boilers

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.

Get what you need with these reliable boiler brands

Whether you want reliability, affordability or efficiency, you can choose exactly what you need with our wide range of boiler options.

Alpha Heating Innovation logo
Alpha
Glow-worm logo
Glow-worm
Ideal logo
Ideal
Vaillant logo
Vaillant
Viessmann logo
Viessmann
Worcester Bosch Group logo
Worcester

Uswitch only works with trusted suppliers

Find great deals on the purchase and installation of leading boilers from our partners here.

Uswitch exclusive
Heatable logo

Warranty

Up to 12 Years¹

Warranty

Up to 12 Years¹

Installation included

Yes

Installation included

Yes

Finance option

0% APR over 4 years²

Finance option

0% APR over 4 years²

Next day installation³
Instant fixed quotes
5,300 5-star Trustpilot reviews⁴
£75 Amazon Gift Voucherwith every completed new boiler installation⁵
Up to 2 Years Free Manufacturer Servicing⁶
BOXT logo

Warranty

Up to 10 years‡

Warranty

Up to 10 years‡

Installation included

Yes

Installation included

Yes

Finance option

0% APR over 2 years‡

Finance option

0% APR over 2 years‡

15,000 5-star Trustpilot reviews ‡
Next day installation
Fitted boilers from £1,675
£50 off‡for Uswitch customers Google Smart Home Bundles available
BOXT Price promise ‡
Uswitch exclusive
iHeat logo

Warranty

Up to 10 years¹

Warranty

Up to 10 years¹

Installation included

Yes

Installation included

Yes

Finance option

0% APR over 2 years²

Finance option

0% APR over 2 years²

5,400 5-star Trustpilot Reviews⁵
Nationwide Engineer Network
Save Up To £840 Per Year
Free Smart Hive Mini Bundle⁴with every new boiler installation.
Next Day Installation Available (Order Before 3pm)³
British Gas logo

Warranty

5 years

Warranty

5 years

Installation included

Yes

Installation included

Yes

Finance option

0% APR over 4 years²

Finance option

0% APR over 4 years²

Only A-rated boilers
Multiple payment options
£0 deposit options
Free Hive Mini¹with every completed new boiler installation
UK's No. 1 new boiler installer
Uswitch services are provided at no cost to you, but we may receive a commission from the companies we refer you to. Products in this table are ranked based on deals that are proving to be popular with our customers, that are competitive in the market and have a smooth buying process.

Save up to £840* when upgrading from G to A

It pays to have a more efficient boiler.

  • Waste less energy
  • Save more money
  • Manage your bills more easily

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.

SEDBUK is basically the same rating system but it adds exact percentage scores to each boiler for extra detail.

Technician installing a boiler

What factors are most important to consider when buying a new boiler?

When buying a new boiler, think about the following:

Boiler type

15% of homes are not connected to the UK's gas network and will need to use an alternative method of heating, such as a wood-burning stove, but the rest of the country will be looking at a gas boiler. There are three main types of gas boiler: combi (best for smaller homes), heat-only (best for homes that use a lot of water in different rooms at the same time) or system (best for bigger homes with poor water pressure). Our boilers statistics page breaks down the average cost per type of boiler installed in the UK.

Boiler size

This is important in terms of the physical size of the boiler and the space it needs to fit into, but also in terms of its power in kW. The general rule of thumb for boilers is that the more heat you need (including to heat water), the higher kW boiler you'll need.

Boiler reliability

While buying a new boiler is expensive, any repairs that need to be carried out on it are also typically expensive, so it's important to try and pick a boiler with solid reliability.

Boiler type

15% of homes are not connected to the UK's gas network and will need to use an alternative method of heating, such as a wood-burning stove, but the rest of the country will be looking at a gas boiler. There are three main types of gas boiler: combi (best for smaller homes), heat-only (best for homes that use a lot of water in different rooms at the same time) or system (best for bigger homes with poor water pressure). Our boilers statistics page breaks down the average cost per type of boiler installed in the UK.

Boiler size

This is important in terms of the physical size of the boiler and the space it needs to fit into, but also in terms of its power in kW. The general rule of thumb for boilers is that the more heat you need (including to heat water), the higher kW boiler you'll need.

Boiler reliability

While buying a new boiler is expensive, any repairs that need to be carried out on it are also typically expensive, so it's important to try and pick a boiler with solid reliability.

Boiler FAQs

* 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/

Heatable Terms and Conditions

¹ Exclusive 12 year manufacturer backed warranty available across all Viessmann 100-W boilers. Warranty is registered by Heatable Ltd and upheld by Viessmann UK.

² 0% APR is available on selected boiler packages. Heatable are a credit broker and not a lender – offering lending services through a panel of lenders. Finance terms under Ordering point 6 at https://heatable.co.uk/terms

³ Next day installations are subject to engineer availability in a customer’s location within the UK and the type of installation being undertaken.

TrustPilot rating accurate as of 17/11/2022. https://uk.trustpilot.com/review/heatable.co.uk

£75 Amazon voucher is applicable to Uswitch customers having completed their Heatable installation purchase through the above link, enabling cookies and third party tracking that allows for confirmation of affiliate purchase. Amazon vouchers will be processed no later than 14 days after an installation has been completed. Voucher cannot be exchanged or substituted for products, discounts or cash value.

2 Years free manufacturer servicing is exclusively available to all Viessmann 100-W products.

BOXT Terms and Conditions

‡ Click to see BOXT Terms and Conditions, Financing information, Warranty information, Trustpilot reviews and the BOXT Price promise.

iHeat Terms and Conditions

¹ All boilers come with a manufacturer-backed warranty ranging from 6 to 10 years.

² 0% APR available on select boiler packages. iHeat are a credit broker and not a lender.

³ Next-day installation availability depends on your location and the type of installation. Orders must be placed before 3pm, Monday - Thursday, excluding bank holidays.

Free hive offer is subject to availability and system compatibility, this cannot be used in conjunction with any other offers or price matching service.

TrustPilot rating is accurate as of 26/01/2023. You can find more information on TrustPilot. https://uk.trustpilot.com/review/iheat.co.uk

British Gas Terms and Conditions

¹ Free Hive Mini including installation is only available on boiler installs when you get a quote online or book an appointment between the 30th January and 27th February 2023. This offer is available to homeowners and landlords with a total system output of up to 50kW. Geographical restrictions apply. Cannot be used in conjunction with other offers. Terms and Exclusions apply. Offers are subject to change without notice.

² British Gas acts as a credit broker, not the lender and offers products from a panel of lenders. Payment options are subject to change without notice. British Gas is a trading name of British Gas New Heating Limited (No. 06723244), an appointed representative of British Gas Services Limited (No. 03141243) which is authorised and regulated by the Financial Conduct Authority (Financial Services Register No. 490568). Both companies registered in England and Wales. Registered office: Millstream, Maidenhead Road, Windsor, Berkshire SL4 5GD. Availability of credit depends on status and credit checks. Terms and Exclusions apply.