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-   -   The net free area (https://www.askmehelpdesk.com/showthread.php?t=395702)

  • Sep 12, 2009, 07:31 AM
    Joywash01
    The net free area
    The net free area of an opening combustion air from an directly from outdoors she be 1 square inch per 4000 btuh of the fuel burning appliances input ratings, therefore, a 160,000 appliance obtaining combustion air directly from outdoors would require a minimum opening of -------?
  • Sep 12, 2009, 07:37 AM
    wmproop
    Is this a test? Are you testing us or are you taking a test

    Get out the books and re-read, is all I know, since I don`t understand the question
  • Sep 12, 2009, 08:15 AM
    Joywash01
    This is homework, and that is how the question was written.
  • Sep 12, 2009, 10:05 AM
    wmproop
    I would guess you would divide the total BTU`s (160,000) by the 1 sq inch per 4,000,, which would be 160,000 divided by 4,000,, total of 40 sq. inches

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