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  1. Joe111222

    ASHRAE Duct Pressure Loss

    Each branch has approx 500mm of duct and then the grille. Branches will likely have VCD's or possibly stream splitter dampers.
  2. Joe111222

    ASHRAE Duct Pressure Loss

    I have a duct 600x600 by about 15m long with 6 branches each at 600x300. According to ASHRAE calculations, at 3200 l/s the main duct has a pressure loss of 1Pa and the branch itself (500 l/s) has a pressure loss of 63Pa. This is the first branch and the 63Pa is higher than the full index run...

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