This chart is based upon a specific gravity of 0.60 and 1,000 Btu per cubic foot for natural gas. My old gas manuals call for sizing to begin at the end, so let’s back our way out of the home’s lines.

8. Proceed in a similar manner for each outlet and each section of gas piping. NATE: “And ACE, don’t forget that the chart is in cubic feet per hour of the gas and you will need to convert the ...