Which Boiler?

Let us guide you through the type of boiler that’s right for you.



Deciding which boiler will make an efficient and practical fit in your home and lifestyle can be confusing. There are three main types of boilers:

  • combination or “combi” boilers
  • system boilers
  • regular boilers

Each type of boiler has its own set of advantages and homes to which they are best suited.

Should your new boiler be fitted into your existing system, then it’s really important to consider the cleanliness of your existing pipework and radiators, as this could cause damage to your new boiler.

We carry out new boiler installations in the Plymouth area, Saltash and across the South Hams area. Please don’t hesitate to contact us if you have any queries about which is the right boiler for your home.

Boiler types - boiler installation Plymouth
Boiler types - boiler installation Plymouth


A combination or ‘combi’ boiler is both a high efficiency water heater and a central heating boiler in one single, compact unit. Combi boilers heat water directly from the mains when you turn a tap on, so you won’t need a hot water storage cylinder or a cold water storage tank in the roof space.

This type of boiler is very cost effective and energy efficient as the water is heated instantly rather than being heated and then stored in a cylinder. An extra benefit is that hot water is delivered by mains pressure, meaning you can have a power shower with no need for a separate pump.

The benefits of combi boilers include: –
  • Compact in size, making combi boilers great for smaller properties
  • Ideal where there is little loft space
  • No need to have a hot water cylinder, meaning an increase in living space
  • No cold water tank storage meaning more loft space
  • No risk of pipework freezing
  • Less pipework in the home, meaning the installation cost is cheaper


This type of boiler needs a cylinder for storing hot water. However, the major heating and hot water system components are built into the boiler itself, making it quicker and easier to install. There is also no need for a tank in the loft, so it is an option in a home with little or no loft space, or where the space is earmarked for a conversion.

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

The benefits of system boilers include: –
  • Great for homes with more than one bathroom
  • Constant supply of hot water to a number of taps at the same time
  • No need for a loft tank, creating more space and a significantly reduced risk of leaks or frost damage
  • Economical to run
  • Built-in components make installation quicker and neater


Regular boilers may be the best option when it comes to replacing an existing boiler.

If the property has an older radiator system, it may not be able to cope with the higher water pressure that is delivered by system or combi boilers.

The benefits of system boilers include: –
  • Perfect for homes where a lot of hot water is used at the same time
  • Ideal for properties with more than one bathroom
  • A good choice when it comes to water pressure being low
  • Compatible with solar water heating systems for a lower carbon footprint and lower energy costs.


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