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  1. 09-07-2009, 08:55 PM #1
    ColdInSeattle
    ColdInSeattle is offline New Guest
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    Minimum height for supply trunk line?

    Hello,
    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!
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  2. 09-07-2009, 09:16 PM #2
    beenthere's Avatar
    beenthere
    beenthere is offline Global Moderator
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    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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