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  1. #1
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,472

    Trane xr15 with 4tee3f31

    this is a changeout we just did. i redesigned how the unit sits in the attic. it used to be up against the chimney wall with a service door on chimney side with a 10" supply plenum on it. that wall is behind my radio in the pic. should have took before and after but didnt.

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  2. #2
    Join Date
    Mar 2011
    Location
    Florida
    Posts
    43
    looks like neat work. if u carried tunes up i know u took your time. thanks for the pics. didnt cost any extra for the pride and quality

  3. #3
    Join Date
    Aug 2008
    Posts
    214
    Nice neat install, That is not an attic- That is an apartment! 2 things of concern... The Pan Drain tied into the Main Drain and the supply tie-in. A nice transition would give a smoother flow into those 90's. Still a good looking job!

  4. #4
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,472
    i put a float switch into the drainpan. that way if it ever did clog once i unclog it i can tilt the drainpan to the drain . i also put air scoops inside to catch the elbow that comes off the side of the plenum. the one that comes straight off should have plenty of flow. the old ductman was giving me hell because i wanted a scoop in the plenum. hes been doing sheetmetal 20 years and needs to goto ductwork school to figure out why i wanted a scoop.

  5. #5
    Join Date
    Jun 2003
    Location
    Jacksonville, FL.
    Posts
    4,313
    What's the point of plumbing the secondary drain into the primary? Why even drain it at all if you do that? The whole point of the secondary is to drain it over a window or door so that the HO knows there's an issue. Also, the kind of safety tee you used is a faulty design & the AHU seems to be leaning (could be a misconception).

    Other than that it looks good!
    WHY?

  6. #6
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
    You should consider a more fluid supply plenum. Very turbulent air flow in there. I think it looks great other than that. On a side note, the floor in the attic looks like its anything but level.
    Always here

  7. #7
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,472
    i agree. we 99% of the time put the emergency over a window. these customers have a historical stone house and wanted nothing showing on the outside. we had to cut open the inside of the house to run new tubing also.

  8. #8
    Join Date
    Jul 2001
    Location
    Anderson,SC
    Posts
    1,034
    What is your code for duct? If its R-8 how did your get it using bubble wrap?


    STUD

  9. #9
    Join Date
    Feb 2006
    Location
    Phoenix,AZ
    Posts
    2,895
    Nice! I like it!

  10. #10
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,472
    the codes are different per county. in howard and montgomery its r-6 in anne arundel its r-8. u can use a 1" spacing with bubblewrap and get r-8 i believe

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