What is a system boiler?
Unlike a combi, both a system boiler and a regular (conventional) boiler work on the principle of stored hot water -- but a system boiler differs from a regular boiler in some important respects.
Many of the major individual components of the heating and hot water system are built in, which means that installation is quicker, neater, easier and more efficient.
The boiler includes an expansion vessel so there is no requirement for a feed and expansion tank in the loft, which allows the installation to save space.
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