Package boilers are used for heating and act as a steam generator for small power purposes such as self-powered industrial plants.” Just like any other boiler, they provide steam for different purposes. In this case, it’s used for producing a small amount of steam because of the size of this type. Although the structure of this boiler is complex, but the good news is that they are pre-packed in the factory and you don’t need to assemble the system in the destination.