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  1. #1
    Join Date
    Mar 2008
    Posts
    4

    Confused Filter Clearance

    I'm looking at suspending my a/c air handler from the ceiling (vertically) in a conditioned space. In this way I won't need a return duct. The return air can enter the unit from the bottom, and I can use the factory mounted filter slot.

    How much clearance will I need below the unit for good air flow. Space is tight.

  2. #2
    Join Date
    Jul 2006
    Location
    west virginia
    Posts
    30
    is there not enough room to install the unit horizontally above the ceiling? most units are multi-position and are easily converted to horizontal left or right

  3. #3
    Join Date
    Jun 2001
    Location
    DFW
    Posts
    684
    For good airflow
    take the smaller dimenstion from the filter size and divide by two.

    for example, if the filter size is 20x24
    then, you need 20" / 2 = 10" minimum clearance between the floor and the filter.

    This assumes that there are NO other airflow restrictions to the filter.

  4. #4
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,744
    gonna be a noisy one..........

  5. #5
    Join Date
    Dec 2007
    Posts
    605
    Quote Originally Posted by t527ed View Post
    gonna be a noisy one..........
    definately
    do it right the first time!

  6. #6
    Join Date
    Jun 2003
    Location
    Florida
    Posts
    9,548
    Alot depends on how you're "hanging" it. Is it boxed in(airflow on one side only), is it hanging in the middle of your living room(4 sides free)? Each situation is different. Got pics?
    If everything was always done "by the book"....the book would never change.

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