Combi Boilers

The most popular boiler
choice for modern homes

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Trust & Experience
that matters:

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Questions

Answer a few simple questions about your home and existing boiler.

Pick your boiler

We will suggest a new energy efficient boiler suitable to your homes needs.

Receive your quote

You will receive a free no
obligation fixed price quote.

Next day Installation

A qualified engineer will install your boiler the next day. T&Cs apply

Get Your Fixed Quote

Questions

Answer a few simple questions about your home and existing boiler.

Pick your boiler

We will suggest a new energy efficient boiler suitable to your homes needs.

Receive your quote

You will receive a free no
obligation fixed price quote.

Next day Installation

A qualified engineer will install your boiler the next day. T&Cs apply

What is a combi boiler?

Combi boilers, short for combination boilers, are one of the most popular types of boiler in the UK. They provide both heating and hot water from a single compact unit, without the need for a separate hot water cylinder or cold water tank.
By heating water directly from the mains whenever you turn on a tap, combi boilers offer an efficient and convenient solution for many households.

See what makes Heatwise the smart choice to replace your boiler

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Why choose a combi boiler?

Efficient, compact heating
designed for modern homes.

Combi boilers are one of the most popular heating systems in the UK, providing both heating and hot water from a single compact unit.

They’re designed to save space, improve efficiency, and deliver hot water on demand — making them ideal for many modern households.
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We install a wide range of

high quality boilers from the best manufacturers

Trusted boiler brands,

replaced by expert Heatwise engineers.

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Find the perfect boiler to replace your old one

Get to know the different boiler types you can get

Combi boilers

The most popular type of boiler

Combi boilers are the most popular and cost-effective choice for many homes. They provide heating and hot water from one compact unit, heating water directly from the mains whenever a tap is turned on.

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Regular boilers

For busier family sized homes

Regular boilers work with both
a hot water cylinder and a cold-water tank in the loft. They’re ideal for older homes with existing vented heating systems, especially where the pipework or radiators may not handle the higher pressure of a modern combi or system boiler.

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System boilers

Common in larger newer homes

System boilers store hot water in a cylinder but store most other components within the boiler itself. They’re perfect for homes with multiple bathrooms where hot water may be needed in several places at once.
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We are
Gas Safe
registered 

Heatwise takes gas safety seriously.  
All of our engineers are on the Gas Safe Register.
Our Gas Safe number is 979562

If you would like to find out more about Gas Safe Register you can call 0800 408 5500 or visit the Gas Safe Register website.

Our frequently asked questions

Your installation includes fitting the new boiler, system checks and making sure everything is working safely and efficiently before we leave.
Yes, we can upgrade or change your system, for example from a regular boiler to a combi, depending on your home and requirements.
Yes, we recommend someone is home so our engineer can access the property and keep you updated throughout the installation.
Not always. In many cases, your existing system can be used, but we’ll let you know if any upgrades are recommended.
There may be some temporary disruption to heating and water, but we aim to keep this to a minimum and complete the job as quickly as possible.
We’ll safely remove and dispose of your old boiler as part of the installation process.

We provide boiler
replacements from
leading manufacturers

Find the right brand to suit
your home and budget.

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