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Thread: increse CFM ??

  1. #1
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    increse CFM ??

    If I had a 3 ton ac with an ahu that derlivered 1200cfm- would installing a fan that produces 1400-1600cfm improve the amount of cooling being delivered???

  2. #2
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    What symptoms do you have that you are trying to correct? The scenerio you suggest could just make it worse.
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  3. #3
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    Exclamation

    Quote Originally Posted by jmiles View Post
    ... Would installing a fan that produces 1400-1600cfm improve the amount of cooling being delivered ?
    NO !
    Designer Dan
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  4. #4
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    Quote Originally Posted by jmiles View Post
    If I had a 3 ton ac with an ahu that derlivered 1200cfm- would installing a fan that produces 1400-1600cfm improve the amount of cooling being delivered???
    It would remove less humidity.

    In short, NO.

    400 CFM/ton is about perfect here in Florida.
    If everything was always done "by the book"....the book would never change.

  5. #5
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    no!!! more cfm = air temp would be warmer, less air, air would be colder. The out-put is determined by the comp btu, moving more air will not change that, it will change moisture removal or run the risk of freezing the coil (if you slowed it down)

    matt

  6. #6
    Join Date
    Apr 2001
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    669
    Yes, more CFM would increase the suction pressure and in turn increase the capacity of the condensing unit. However, that increase in capacity will be an increase in sensible heat and less latent heat which will probably result in less comfort; depending on your geographical area.

    Jabs

  7. #7
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    Might, or it might not.

    Depends on the duct system, you might not get more then another 1000 CFM.

    You will lose humidity control if it does move more air.
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  8. #8
    Join Date
    Apr 2006
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    101
    400 cfm per ton of cooling, more airflow across the coil will cause the coil to freeze up, you must try to keep a load up on the coil for an efficient system..

  9. #9
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    more airflow across the coil will cause the coil to freeze up
    Huh?

    You'd better think about that one.....

  10. #10
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    burlington county n.j.
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    Quote Originally Posted by freeeze43 View Post
    400 cfm per ton of cooling, more airflow across the coil will cause the coil to freeze up, you must try to keep a load up on the coil for an efficient system..


    hows it do that??

  11. #11
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    *

    Quote Originally Posted by smokin68 View Post
    It would remove less humidity.

    delete, i need my reading glasses!



    .
    Last edited by Airmechanical; 07-23-2007 at 10:37 PM.

  12. #12
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    *

    Quote Originally Posted by freeeze43 View Post
    more airflow across the coil will cause the coil to freeze up

    can't agree with this either!



    .

  13. #13
    Join Date
    Nov 2000
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    Eastern PA
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    Less humidity control. Increased air pressure problems. Increased load problems. All around bad idea.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


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