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  1. #1

    Minimum height for supply trunk line?

    Is there a minimum height-width ratio for a supply trunkline? I need to run about 140 in^2 through my trunk line and I'd prefer to do something like 4x35 rather than 6x24. Will that have any negative impact on my system?

    Thanks in advance!

  2. #2
    Join Date
    Jan 2004
    Yes, it won't move the air like you think it will.

    Your contractor should know this. And know what ratio he can use.
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    How many times must one fix something before it is fixed?

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