The size of the property & and planned extensions

The current boiler type & pipework in your property

The number of showers & the number of bathrooms

The area’s water pressure

The type of property

If the boiler needs to be solar compatible

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A Combi boiler, also known as a combination boiler, is a type of condensing boiler. 

They are the UK's most popular type of boiler and can be an economical option, as combi boilers only heat the water you use. They are a compact solution perfect for smaller properties.

Since you only heat the water you need, when you need it, combi boilers are very economical and cost efficient to run.

As a combi boiler requires no tank, it is one of the more straightforward boiler types to install. 

With no water tank to heat up, combi boilers can provide an unlimited supply of hot water on demand

As there is no need for a separate water tank, combi boiler systems take up much less space than conventional heating systems.

A System boiler directly heats your central heating system and produces hot water for a storage cylinder. 

They work like a conventional (regular) boiler in that they need to store hot water, but unlike conventional boilers they take their water supply directly from the mains. They are a great solution for busy or large households with more than one bathroom.

System Boilers can supply a constant supply of hot water to any number of taps at the same time making them ideal for larger homes.

With a system boiler, there is no need for a cold water feed tank, freeing up space and eliminating any worries about leaks or frost damage.

System boilers are compatible with solar water heating systems which deliver environmental benefits as well as lower energy bills.

Most of the components needed for a heating system are already built into a system boiler. This makes installation quicker and neater.

Conventional boilers (also known as regular, standard or heat-only boilers) operate your central heating system through a separate water cylinder and boiler.

The benefits are similar to a system boiler however customers tend to opt for a conventional boiler if their property has an older radiator system, as it might not be able to cope with the higher water pressure that is delivered by system or combi boilers. They’re also a good option where water pressure is low, as other means can be utilised to increase the domestic water performance in the property e.g. a pump.

As the water comes from a water cylinder, you can use multiple sources such as taps and showers, without experiencing any effect on water pressure or temperature.

When it comes to replacing the heating system in an older property, a regular boiler can be a good option as it requires minimal changes to the pipework if any.

Conventional boilers are compatible with solar water heating systems for a lower carbon footprint and lower energy costs.

If you live in a low water pressure a conventional boiler may be the best solution as other means can be utilised to increase the domestic water performance in the property e.g. the use of a pump.