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    gas pipe sizing (3 Posts)

  • zepfan zepfan December 4, 2011 @ 9:29 PM
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    gas pipe sizing

    as a rule of thumb what diversity factor should be used when sizing a 2 psi gas pipe system? say for example you have (5) 130,000 btu input gas fired rooftop units,with a design day in the winter of 12 degrees.it is highly unlikely that all of these units would be firing at the same time.is there a diversity factor that should be used when sizing the pipe?any feedback would be much appreciated.thank you
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  • Henry Henry December 5, 2011 @ 9:10 AM
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    Gas piping

    By code, one should always size for the maximum BTU input of all appliances regardless if they only work part time or in the off season.
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  • Tim McElwain Tim McElwain December 5, 2011 @ 7:01 PM
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    In other words with

    your application there is no diversity factor. Diversity factor would be having a pool heater for use in the summer time and a boiler for use in the winter.

    There actually is the possibilty at some time they all would be firing.
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