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  1. #1
    Join Date
    Jan 2004
    Posts
    60

    3 way grille or 4 way grill in front of the window

    Can someone explain to me when to use 4 way grille and when 3 way? In this particular I case I need to replace old rectangular grille in the ceiling tile right above the window to the new 8 by 8 one, not sure what kind
    Thanks

  2. #2
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Norally;

    4 way is centered in the room,3 way is on/near a wall ,with one throw into the room,and the other two along the wall in opposite directions.

  3. #3
    Join Date
    Jan 2004
    Posts
    60
    Quote Originally Posted by dash View Post
    Norally;

    4 way is centered in the room,3 way is on/near a wall ,with one throw into the room,and the other two along the wall in opposite directions.

    Thanks,

    Is one way better then other or just depends on location of the outlet? In other words if 3 way moved away from the window and changed into 4 way would result be the same ?

  4. #4
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    IMHO,it depends on your climate.

    4way centered works well in Florida,with most of the summer heat gain is at the ceiling,in a colder climate the 3 way puts two thirds of the air along the outside walls in the winter,where most of the hest loss is.

  5. #5
    Join Date
    Mar 2002
    Posts
    327
    The true purpose of ductwork is to "WASH" the window with a thermal barrier and keep the outdoor temperature outdoors. Any other air is wasted.

  6. #6
    Join Date
    Jan 2007
    Location
    Minneapolis, MN
    Posts
    415
    Quote Originally Posted by classicrock4you
    The true purpose of ductwork is to "WASH" the window with a thermal barrier and keep the outdoor temperature outdoors. Any other air is wasted.
    Could you please explain this in greater detail.

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