A system boiler - also referred to as a 'sealed system' - provides central heating and hot water via a storage cylinder housed in an airing cupboard meaning that there is no need for water tanks to be housed in the loft as there is with an open vent boiler.
A system boiler is most suited to a larger house where there are multiple bathrooms/ensuites and families.
Benefits
- High flow rate for domestic hot water
- No need for storage tank(s) in your loft - more loft space
- More than one hot tap - your shower can easily operate at the same time as your kitchen taps
Disadvantages
- Hot water is not instant
- Once the water in the storage cylinder runs out you have to wait for it to reheat
- You'll need to find space for the cylinder (usually an airing cupboard)
