System boilers are still technically heat only boilers. They still require a cylinder for storing hot water. The main benefit of a system boiler over a heat only boiler is a system boiler has the major heating components built into the boiler itself, making it quicker and easier to install.

Gas System Boiler

In addition, because a system boiler is designed to work under pressure, or more commonly known as a sealed system, there is no need for a header tank in the loft. This helps again with space saving but sealing your heating system helps your heating system run more efficiently by preventing air from being drawn in, which is the primary cause of sludge.

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

  • Ideal for homes where Combi boilers run out of performance, such as two bathrooms or more.
  • No need for a header tank, freeing up space and eliminating worries about leaks or frost damage.
  • Economical to run.
  • Built-in components makes installation quicker and neater.
  • Automatically seals the system off, which prevents air ingress / cold tops to radiators or towel rails.