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Gas Pipe Sizing for Iron Pipe

Note: If using Trac Pipe use their specifier for sizing. (Located on APR/Citrix Desktop)

This chart will give you the cubic feet of gas required.  Use the formula below to get the proper sizing from chart.

Cubic Feet of Gas Required =
Gas Input of Unit (BTU/HR) / 1000 BTU/HR (Heating Value of Natural Gas)

Assume 60,000btu furnace and we have to go 40 feet. Take 60,000 / 1000 = 60 cubic ft of gas required;therefore 1/2 inch pipe will make it (See 63 in red on the chart)