Combi Boiler Installation – Supply & Fit
Get a new combi boiler supplied and professionally fitted by Gas Safe-registered installers. Compare suitable boilers and receive a clear installation quote for your home.
Supply and installation
A-rated combi boilers
Leading manufacturers
Gas Safe registered installers
How does a combi installation work?
It’s not what we do but how we do it that makes us better than the rest...
Step 1
We ask a few simple questions about your home to help us to work out which size and type of boilers are best suited for you.
Step 2
We’ll provide you a range of suitable boiler options. Everything you'll need is included in your price.
Step 3
A gas safe engineer local to you will arrive on your requested install day with your selected boiler and begin the installation.
Once installation is complete, we'll get it registered with Gas Safe for you, & we'll even register your new boiler with the manufacturer too to begin your warranty cover.
Choose From Leading Boiler Brands
How Much Does Combi Boiler Installation 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.
Can You Convert My Boiler to a Combi?
Yes, it may be possible to replace a conventional or system boiler with a combi boiler. This will depend on your property, existing heating system, water pressure and hot-water requirements.
A conversion may include removing the existing hot-water cylinder or storage tanks and making changes to the pipework. BeSure will assess your requirements and provide a clear quote covering the boiler, installation and any additional work required.
Switch to an A-Rated boiler and save over £400 a year on your annual heating bills*
What's included in a combi boiler installation?
Your personalised quote can include everything required for a safe, professional installation:
New A-rated combi boiler
A suitable boiler selected for your home, heating and hot-water requirements.
Professional fitting
Installation by a qualified Gas Safe registered engineer.
Essential parts and pipework
The required flue components, fittings, pipework, controls and thermostat for your installation.
Testing and commissioning
Your new boiler will be tested and commissioned to ensure it operates safely and correctly.
Old boiler removal
Your existing boiler will be removed and responsibly disposed of where included.
Extended manufacturer warranty
Eligible boilers include an extended warranty, depending on the manufacturer and model selected.
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.
Ready for Your New Combi Boiler?
Get a free, no-obligation combi boiler installation quote.
Trusted by Thousands of UK Homeowners
We’re rated Excellent on Trustpilot because we make upgrading simple, fast, and hassle-free
