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  1. 10-11-2005, 02:32 PM #1
    shifrbv
    shifrbv is offline Regular Guest
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    Unhappy

    I have return duct 20x25 with 1" opening at the top to insert/remove standard filter.

    Was thinking about upgrading to 5" media filter.

    Would you:
    a) Install AirBear/Honeywell/Carrier/TotalLine cabinet
    or
    b) Modify duct, cut additional 4" opening at the top, rivet 4L aluminum brackets for the filter to slide in/out, fab simple cover like.

    Thanks,
    Brian
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  2. 10-11-2005, 03:23 PM #2
    Jultzya
    Jultzya is offline Grumpy Old Man
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    A
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  3. 10-11-2005, 03:29 PM #3
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    Wild Leg
    Wild Leg is offline Professional Member
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    I lean toward the first choice, because there you increase chances of error with field fabrication.
    Just adding a couple of rails does not guarantee that the air will actually pass through the filter.
    RSES Certificate Member Specialist

    Southwest Regional Association of RSES Secretary, 2017
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  4. 10-11-2005, 04:08 PM #4
    dash
    dash is offline Banned
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    I like option b ,if that means you can use a 20X25 media filter,and you put some gaskets on the down stream rails to prevent bypass air.

    What size and cfm system?
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