Aside from my other post re. repairing existing boiler. I am tempted
by the higher efficiencies of the condensing boilers but are there
hidden problems in upgrading an existing installation.
I do not need a combined boiler - I have HW cylinder and pump /
valves.
Concerns I have are -:
Cleanliness of existing system - any prerequisites?
Will existing rads be ok - presuming that water temp is lower????
TIA.
Rob