Combi Boiler Prices With Installation
Find out how much a new combi boiler could cost for your home. Compare leading combi boiler options and get a FREE, no-obligation installation quote from BeSure.
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What Affects Combi Boiler Prices?
How Much Does a Combi Boiler Cost?
The cost of replacing a boiler depends on the type, brand and output required, as well as your existing heating system. The boiler’s location, any pipework changes, installation requirements and removal of the old unit can also affect the final price.
BeSure will assess your requirements and provide a clear, personalised quote covering the boiler and professional installation.
The price of a combi boiler depends on the output and manufacturer selected, as well as your property size, number of bathrooms and hot-water demand. Your existing boiler type, any required pipework changes and the complexity of the installation can also affect the final cost.
Switch to an A-Rated boiler and save over £400 a year on your annual heating bills*
Which Combi Boiler Size Do I Need?
The right combi boiler size depends on your property, number of radiators, bathrooms and hot-water usage—not simply choosing the largest model available.
24–27kW
Typically suitable for smaller homes with up to 10 radiators and one bathroom.
28–34kW
Typically suitable for medium-sized homes with around 10–15 radiators and one or two bathrooms.
35–42kW
Typically suitable for larger homes with up to 20 radiators and greater hot-water demand.
These are general guidelines. BeSure will help you choose an appropriate boiler based on your home and heating requirements.
Get a clear, personalised combi boiler price including installation requirements, with no obligation to proceed.
Local, vetted, and trusted gas safe installers – no cold calls, no hassle.
Trusted by Thousands of UK Homeowners
We’re rated Excellent on Trustpilot because we make upgrading simple, fast, and hassle-free
Why choose BeSure for your combi boiler installation?
Upgrading your boiler doesn’t have to be stressful. With BeSure, you can:
Save over £400* a year on your energy bills
Gas Safe registered installers only
Free, no obligation quotes within hours
Join thousands of happy UK homeowners
Local, vetted, and trusted gas safe installers – no cold calls, no hassle.
FAQs
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A combi (combination) boiler provides both central heating and hot water from one compact unit. It heats water directly from the mains when you turn on a tap, so there’s no need for a separate hot water cylinder or cold water storage tank.
Heats water directly from the mains – Hot water is delivered on demand, so you don’t have to wait for a tank to refill or reheat.
No hot water cylinder required – Frees up cupboard or loft space, making it ideal for homes where space is limited.
Compact and space-saving – Most combi boilers fit neatly into a kitchen cupboard.
Energy efficient – Because water is heated only when needed, combi boilers can help reduce energy waste and lower bills.
Ideal for small to medium homes – Best suited to properties with 1–2 bathrooms and good mains water pressure.
Combi boilers are one of the most popular choices in UK homes due to their efficiency, convenience and space-saving design.
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Only BeSure staff will contact you. You won’t receive unexpected calls from any one else, and your details are never shared with other companies.
You stay in control at every step.
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Yes – in most cases you can replace a conventional (regular) or system boiler with a combi boiler. This is known as a boiler conversion.
The installer will remove the hot water cylinder and, if applicable, the cold water tank, then reconfigure the pipework so the combi heats water directly from the mains.
This will typically free up valuable space in your airing cupboard and loft.
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Yes – your installer will remove the old boiler and safely dispose of it. The whole process is managed for you, start to finish.
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Average combi boiler supply & fit in the UK:
Small property – £1,600–£2,200
3-bed semi – £2,200–£3,000
Larger home – £2,800–£3,500+
The exact cost depends on output size (kW), brand, and pipework changes.
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It depends – if you’re switching boiler type or moving its location, you may need new pipework. Your installer will assess everything upfront and give you a clear quote.
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Yes – every price covers the full package: supplying the new boiler, fitting it professionally, certification, warranty and ensuring your system is up and running smoothly. No hidden extras.
Who is BeSure?
BeSure is a family run business built by Gas Enginners with over 40 years experience. We install energy efficient, cost effective boilers.
We like to think of ourselves as the perfect blend between a big national company and a man-in-a-van. We can offer you the advice and support of the big players whilst being as competitive as your local installer.
Get Your Combi Boiler Price
Get a personalised quote based on your home and installation requirements.
Trusted by Thousands of UK Homeowners
We’re rated Excellent on Trustpilot because we make upgrading simple, fast, and hassle-free
