Is there an easy way to size gas pipe. I'm seriously spinning my wheels on this. I'm replumbing most of a 4500 square ft. home with two tankless units, furnace , two gas fireplaces and a gigantic professional type stove. Currently has a 1" B.I. line. I'm having trouble converting the BTU imput ratings of the appliances to a cubic feet rating for the pipe size. Anybody out there good at this?
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Gas pipe sizing