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Rule of thumbs

j a_2
j a_2 Member Posts: 1,796
I am not a huge fan of rules of thumb to finalize a question...However just to confirm my understanding, can it be said in ONE pipe steam, counter or parell flow, if you have an existing 2 inch main then your replacement boiler should not be bigger than 387 sq. ft. of steam...Does that make sense?  thanks  J A


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