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Thread: A bit choked

  1. #1
    Join Date
    Jan 2010
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    Cedar Rapids, IA
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    A bit choked

    I work in property maintenance. Got a new house, went to check furnace. Found this lovely return boot. It shrunk the duct enough that any filter I put in there implodes from the air velocity. Also note how it gets bigger after the elbow. (Know nothing of its history, but I suspect there was a side-by-side originally).

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  2. #2
    Join Date
    Sep 2002
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    How many BTU's is the furnace?
    How many tons is the AC ?
    How big is the small/new portion of the return duct?

    PHM
    -------------


    Quote Originally Posted by tjrobb View Post
    I work in property maintenance. Got a new house, went to check furnace. Found this lovely return boot. It shrunk the duct enough that any filter I put in there implodes from the air velocity. Also note how it gets bigger after the elbow. (Know nothing of its history, but I suspect there was a side-by-side originally).

    Sent from my SM-G930R4 using Tapatalk
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  3. #3
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    Aug 2015
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    Buffalo,NY
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    If I had to take a guess it looks like there was an old low boy furnace sitting there before.


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  4. #4
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    Jan 2010
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    Cedar Rapids, IA
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    Thread Starter
    Starts roughly 19x19, goes to 10x20 (yes, 20; the duct isn't kicked so there's an overhang), then to 16x20 for the filter. It's 2.5 tons, 60k. (Edit: tonnage is rough, there's only 3" between the house and condenser so it's hard to read.)

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  5. #5
    Join Date
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    I'd want to verify that blower speed / air flow rate you have there before I did anything else.

    PHM
    ---------




    Quote Originally Posted by tjrobb View Post
    Starts roughly 19x19, goes to 10x20 (yes, 20; the duct isn't kicked so there's an overhang), then to 16x20 for the filter. It's 2.5 tons, 60k. (Edit: tonnage is rough, there's only 3" between the house and condenser so it's hard to read.)

    Sent from my SM-G930R4 using Tapatalk
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  6. #6
    Join Date
    Nov 2006
    Location
    Athens, Ohio
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    Gas furnaces are about 28" deep. There should be at least a 16x25 filter rack on the outside of the furnace. That furnace appears to have no external filter.
    I don't recall ever seeing a GOOD internal filter arrangement, except for Lennox hammock filters which were a PIA.
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  7. #7
    Join Date
    May 2006
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    This is what i call an install by a hack

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