A system boiler is a type of boiler that is commonly found in larger homes with greater demands for heating and hot water. By featuring a separate cylinder for storing water, system boilers are able to provide a constant supply of hot water throughout the home, unlike combi boilers which can only heat water on demand.

• No need for a tank, easier maintenance, and less worry about frost damage and leaks.
  
• Compatible with solar thermal systems, making them a very energy-efficient option
  
• You don’t have to worry about being in an area with low water pressure
  

• You still need space for a hot water cylinder.
  
• Once the hot water has run out from the hot water cylinder, you will need to wait for it to heat up again before you can use the hot tap.
  
• System boilers can cost more to install than a basic combi boiler
  
• You can lose heat from the stored hot water in the hot water cylinder.