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    Basem104 Posts: 1, Reputation: 1
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    Jun 13, 2013, 10:44 AM
    What is the ESP for a ducted FCU with Supply, Return and Fresh air ducts?
    We have FCU connected to a supply duct from a side, from other side there is a return duct, to that return duct we have a connection to fresh air duct. The question, to calculate ESP of FCU we have to find the ESP for all the three ducts and add or only the longest path?

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