Your cookie preferences

We use cookies and similar technologies. You can use the settings below to accept all cookies (which we recommend to give you the best experience) or to enable specific categories of cookies as explained below. Find out more by reading our Cookie Policy.

Select cookie preferences

Skip to main content

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.


Uswitch only works with trusted suppliers

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


UK’s No.1 online boiler installer
Over 27,000 5-star TrustPilot reviews ‡
Buy now and pay nothing until next year
Next day installation
Boilers fitted from £11 a month
£0 deposit options available
Manage your install with the BOXT customer app
Up to 10 years‡
Installation included
Finance option
0% APR over 2 years‡
Beat any like-for-like quote with the BOXT price promise‡
£50 off for Uswitch customers‡


Fitted in 24 hours³
9,300 5-star TrustPilot reviews⁴
Which Trusted Traders 2nd Year Running
Boilers fitted from £4.99 per week⁵
Up to 12 Years¹
Installation included
Finance option
0% APR over 4 years²
£50 off for Uswitch customers with USAVE50⁶
Get £50 off with Uswitch, plus – Buy Now and Pay in 2025⁷


Uswitch exclusive
Reserve boiler free at checkout, pay later
Next day installation³
Over 7,200 5-star TrustPilot reviews⁴
Save up to £840 per year
Which? approved Trusted Trader
Up to 12 years¹
Installation included
Finance option
0% APR over 2 years²
For Uswitch customers with code HIVEMINI⁵
Free Hive Mini installed and 0% APR on selected deals

British Gas

UK's No. 1 new boiler installer
Only A-rated boilers
Multiple payment options
£0 deposit options
Up to 12 years³
Installation included
Finance option
0% APR over 3 years²
Get up to three years’ interest-free credit²
You could cut your energy bills by up to 22% with an A-rated new boiler from British Gas¹

Glow Green

Lowest Price Guarantee¹
Free Expert Advice
Rated Excellent on TrustPilot²
Fast Installation
Buy now, pay nothing for 12 months³
Uswitch Exclusive
Up to 12 years⁴
Installation included
Finance option
0% APR over 2 years⁵
Free boiler service worth (£95.88)⁶
£100 off the cost of select Worcester Bosch & Vaillant boilers⁷

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.







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

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 heating method, 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 boiler 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 the 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 guides

British Gas Logo
10 May 2024

British Gas HomeCare boiler cover

Boiler cover is a popular way to ensure your boiler system stays in check. We take a look at the HomeCare range from British Gas.

Learn more
Feature image of someone adjusting boiler settings alongside the title UK Boiler statistics 2023.
04 January 2024

UK Boiler Statistics 2023

We’ve collated the latest boiler statistics for 2023, covering the UK boiler market, boiler breakdown statistics, the future of home heating, and more.

Learn more
06 October 2022

Boiler cover: questions and answers

If you have queries or reservations about getting boiler or central heating cover, we’ve put together this guide to provide you with all the answers you need.

Learn more
06 October 2022

Boiler cover and boiler maintenance contracts

Which boiler cover provider is right for you? Find out about your heating cover options - make an informed choice and save on boiler cover today.

Learn more
06 October 2022

Top tips for choosing your heating cover

Heating cover is important. Make sure you make the right choice with our top tips for choosing boiler or heating cover and compare prices to find a great deal.

Learn more
26 September 2022

Which type of boiler is best for your home?

Read our boiler guide to find out everything you need to know about boilers. A comprehensive guide to combi, condensing and conventional boilers.

Learn more

View all boiler guides


* 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:

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

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

⁴ TrustPilot rating accurate as of 27/02/2023.

Boilers fitted from £4.99 per week representative example breakdown: £21.61 for 120 months, 11.9% APR, Deposit £360.00, Monthly payment: £21.61, Interest: £1,043.20, Annual rate: 11.9% APR, Loan amount: £1,550.00, Total payable: £2,593.20.

⁶ £50 Uswitch (USAVE50) code is applicable to all orders when code is used prior to booking. Cashback promotions are specific to particular and clearly labelled installation packages and bundles. For Uswitch customers, the £50 code can be used in conjunction with cashback promotions. The £50 code whilst applicable to all products, is taken off of the total sale amount of the chosen installation package and cannot be added to the cashback amount. All cashback payments will be made via BACS transfer only and cleared within 30 woring days of a completed installation. Bookings cancelled prior to installation do not qualify for discounts or cashback.

⁷ Buy Now Pay Later products are an interest-bearing finance product, subject to a standard credit check with 16.9%APR applicable at the end of the ‘pay later’ term should the amount not be cleared. Balance clearing subject to a fixed £29 fee.

BOXT Terms and Conditions

‡ Click to see BOXT Terms and ConditionsFinancing informationWarranty informationTrustpilot reviews and the BOXT Price promise.

iHeat Terms and Conditions

¹ All boilers come with a manufacturer-backed warranty ranging from 6 to 12 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. For further information on our installation terms please see

⁴ TrustPilot rating is accurate as of 31/01/2024. You can find more information on TrustPilot.

⁵ Free Hive offer is valid for all orders and must be redeemed by using the code "HIVEMINI" during the booking process. This code cannot be used together with any other codes or promotions. Please note that the code cannot be claimed after the installation has been completed.

British Gas Terms and Conditions

¹ Saving up to 22% based on the average energy bill of a semi-detached home when upgrading from a D-rated to an A-rated boiler. Source:

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.

³ Annual boiler service required from year 2

Glow Green Terms and Conditions

¹ Click to see a full list of the “Lowest Price Guarantee” Terms and Conditions - terms-and-conditions/lowest- price-guarantee-boiler-and- air-conditioning

² TrustPilot rating accurate as of 05/03/2024 -

³ BNPL ("Buy Now Pay Later") offers the ability for customers to pay the balance of their boiler installation over a 12 month period without paying any interest on the amount they borrow. Without paying a deposit, we can submit an application for you that, if approved, means that you could have the boiler installed and pay nothing for up to a 12 month period. provided that the full loan balance is repaid within that period, there are no interest or exit fees for the you to pay and no restrictions on how much or how often you make payments Only if the full balance is not repaid during the BNPL period will the remaining amounts become due under a 60 month interest bearing finance plan at 19.9% APR (representative), with the equal payments being taken by the lender using Direct Debit. Any credit is subject to application, financial circumstances and borrowing history.

⁴ The 12 year warranty is only available for customers who have Worcester Bosch or Vaillant boiler supplied and fitted by Glow Green Ltd and is subject to a Glow Care 100 service contract being taken out at point of sale for the full 12 year period. USwitch customers will pay nothing for the first 12 months of the service contract and be charged from month 13 onwards.

⁵ Glow Green Limited is authorized and regulated in the UK by the Financial Conduct Authority RN: 692433 for credit broking activities. Finance options are provided by a panel of lenders and may be dependent on the product you are purchasing. Terms and conditions apply. Glow Green Limited acts as a credit broker and is not a lender. Any credit is subject to application, financial circumstances and borrowing history. (0% APR Offer) Representative Example: Cash Price £2,500. Deposit Payable £0. Total Amount of Credit £2,500. Total Interest £0. Total Amount Repayable £2,500 Repayable by 24 monthly installments of £104.16 Representative 0.00% APR (fixed). Rate of Interest 0.00% a year (fixed). Duration of Agreement 24 months. The approval of your application depends on your financial circumstances and borrowing history.

⁶ All Uswitch customers are eligible for an exclusive free 1st Year boiler service and heating health check upon installing a new boiler with Glow Green. To claim your free Boiler service and Heating Health check you must sign up to Glow Care 100 or 300 when you place your order. You will not be charged for the first 12 months, and payments will start from month 13 onwards. T&C’s

⁷ All Uswitch customers are eligible for a further £100 Discount which is applicable for all boiler installations featuring the Vaillant EcoTEC Plus or Worcester Bosch 4000 series product ranges. The discount will be applied when you place your order and will be taken off the Total Sale amount. This will be displayed as a discount on your invoice.

Author: Ben Gallizzi | Last updated: 20 March 2024