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  1. #1
    Join Date
    Apr 2007
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    Converting CFM to Energy Use

    Hi everyone, I don't know whether or not this question is fit for this forum. I'm doing a project for a class I'm taking at the Univ of Illinois, and I know very little about HVAC.
    I am wondering how I can convert a CFM figure to energy use. For instance, if my AHU was doing 35,000 cfm and I know some of the basics regarding the fan (HP, volts, Hz, 3 phase, etc). Is there any form of general equation to get from cfm to energy input to run the fan? Also, would the equation be different if a VFD is being used rather than a traditional drive?

    Thanks for any help you can provide!

  2. #2
    Join Date
    Jun 2005
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    You need to google fan curve it will help you a lot

  3. #3
    Join Date
    May 2004
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    "If I had my life to live over again, I'd be a KA." - Albert Einstein

    It's later than you think.

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