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Downsizing boiler replacement
I have 200k/157k one pipe steam boiler from the 70s. After a couple remodels I’m only using 300 EDR as we’ve removed some radiators so we are really oversized. All things equal, if I swapped it out for say a 100k or appropriately sized boiler, what kind of gains would I be looking at? Or would the smaller boiler just have to run longer? Can it make the same amount of steam with the same run times but burning half the natural gas?