When my oil heating is on should it heat the water in my back boiler of open fire as well?

[Bomber74]

When my oil heating is on should it be heating the water in my back boiler of open fire as well?

 

[ShaunCorbs]

No as they shouldn’t be connected

 

[Bomber74]

When my fire is on its heats my radiators. Works off a separate pump from oil heating

 

[SimonG]

Systems can be combined but sounds like it's been done by bodgit and scarper.