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Thread: register sizes

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  1. #1
    Join Date
    Dec 2007

    Talking register sizes

    i understand the diameter of the duct feed is important but how do you match the register size?Do you use the biggest size available for the diam. duct your using,i.e. 7" duct feed or return with a 6x12 register.How do you know when to go to a 4x10 register?

  2. #2
    Join Date
    Feb 2008
    Northern NJ

    Default Re: register sizes

    many factors will determine the register size. if its a return bigger is always better. supply can be differnt sizes depending on the desired effect. a smaller register will give you more velocity but a larger one will give you less air noise.


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