Nice looking job. Is that an expansion tank on the top?
Yes it is. The old tank was more than adequate in capacity due to removing a 1,400 pound cast iron monster and replacing it with a couple small modulating condensers. Probably 40-50 gallons less system capacity now. It was an interesting job because all the old boys in the church were simply dumbfounded that those two dinky wall hung boilers were capable of heating 8,500 sq ft. They literally hovered in the boiler room while we were working and loudly proclaimed their disbelief. After this winter with a nice warm church and a 40%+ reduction in their fuel use.........let’s just say that there was a conversion of a non-spiritual type going on there.
