So i was wondering if a centralised sump with a heap of heaters would work
Sump will not be pumping any water thru the tanks as all tanks are separate systems.
What i was hoping to do would be plumb pipes through all tanks in say a u shape, so im pumping hot water thru the pipes and back to the sump
if this seems like it will work let me know
If u have any other ideas i will be interested as i do not want to buy 20 heaters and run them all winter
i dont really have the space to build a new room and insulate it properly