Can I get a backboiler connected to an indirect vented hot water cylinder through the existing small bore coil which was used previously for a pumped oil boiler, ie do I have to get a new tank with a wide bore gravity feed coil (and scrap the present hot tank?)
I understand the pump would have...
I'm hoping to have a back boiler woodburner installed, which can work to heat cylinder by gravity even when no power (still happens!). Looking at other threads, I fear that pumps MUST now be installed, so is this not now allowed?