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  1. #14
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Yes the make 4" filter frames,pricey ,and you need enough space behind them unrestricted, them for the filter.


    Will handle,means they increase ESP,and your duct system may be on the small side,so the increase will raise the ESP,beyond what the VS can safely deliver the required cfms.This can be reduced by using a larger filter ,if possible,or adding a return duct and grille,anything to reduce the ESP(static).

  2. #15
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,072
    Originally posted by gmahler
    they didn't give me a model no. on the bid.
    That is always an important bit of info.that should have been on the bid.
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