Thanks for any advice you can offer.
I am replacing an oil boiler with a natural gas boiler for heat and hot water.
A reliable installer did a heat loss and suggested the Buderus models listed above.
The install will be in the northeast US, cast iron radiator system in 90 yo home.
Should I be concerned about the durability of the aluminum exchanger in the GB142? I have read about water/contaminants in old systems fouling the aluminum.
I believe the installer plans the hot water to come real time off the boiler. We have 3 1/2 baths, with three teenagers. Should I install a hot water holding tank fed by the Buderus?
Thanks for any insight,