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  1. mech7981

    New duct airflow

    The design ESP = 0.50" w.g. That's with the current as-built conditions. The fan is probably capable of a little higher ESP though.
  2. mech7981

    New duct airflow

    Hi. I have a question about a duct modification. I have an OAHU that serves existing AHU-1 with around 1500 cfm. I'm wanting to put a tap somewhere on that duct and run a round duct to serve AHU-2 with about 100 cfm of OA. My question is, what size of round duct do I need to get approximately...

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