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    The best method for measuring airflow at the...

    The best method for measuring airflow at the grilles would be through the use of a flow hood.

    Was a load calc done to verify you need 800 CFM on the second floor.
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    I don't think I would trust any direct CFM...

    I don't think I would trust any direct CFM readings taken by it.

    Most pre-programmed grille correction factors in those meters are not even close.

    I would also have to ask the question are you...
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