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  1. 05-02-2010, 07:01 PM #1
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    Brian_UK
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    Re: Free air calculation.

    Best/easiest way is to make up a cardboard air collection hood, calibrate it and then take all of your readings with the hood.

    edit: Just checked with Lindab catalogue, they don't give free areas (damn). Looks like you'll have to measure the slots yourself.
    Last edited by Brian_UK; 05-02-2010 at 07:08 PM.
    Brian - Newton Abbot, Devon, UK
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