I am replacing an oil fired boiler with a natural gas fired unit. I live in southern New England in a 3500 sq ft house with cast iron radiators built in 1922.
I have a contractor selected who did a heat loss estimate. He is well recommended and has successfully installed Buderus units for discerning friends.
I need to choose between the Buderus units listed above. I have an odd chimney which needs to be lined for the G234x. By the time that is included, the units will be within $1000 dollars.
I'd like to go with the GB 142 but wonder a bit about the reliability of the aluminum/high tech unit vs cast iron.