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    kati.kado's Avatar
    kati.kado Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 25, 2011, 12:48 AM
    What is meant by 100% fresh air?
    Hi all, I would like to know what is meant by 100% fresh air and how this is achieved. Is this that the AHU is designed in such a way that the return air is not mixed back or is it something different. Please anyone clarify, thanks.
    smoothy's Avatar
    smoothy Posts: 25,490, Reputation: 2853
    Uber Member
    		  
    #2

    Jul 25, 2011, 07:30 AM

    There is likely a heat exchanger that allows the exiting stale air to heat or cool in incoming fresh air to near the same temperature as practical. That allows 100% fresh (outside) air with a minimal extra operating costs.
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