Dual A/C compressors ?

Discussion in 'General Real Estate and Real Estate Finance' started by Riick, Apr 24, 2009.

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  1. Riick

    Riick Elite Member

    11
    Aug 14, 2007
    Professional Status:
    Certified Residential Appraiser
    State:
    Delaware
    I've been in two recently built (large - over 3,500 sq.ft.) homes in the last two weeks
    - both for REO purposes - no owners there.
    Both homes had 2 A/C compressors in the rear, but only one furnace/air handler in basement.
    I also noted that one of the compressors was substantially smaller than the other - lower BTU rating?
    Neither home had a 2nd air handler evident on upper floor
    (( Did not investigate attic through scuttle: non-FHA appraisals)).

    I would ordinarily think that they had split-system heating & A/C,
    but, again, no 2nd system evident.

    Something new? ... What is the story here: ??

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  2. Mr Rex

    Mr Rex Elite Member

    14
    Jan 12, 2004
    Professional Status:
    Certified Residential Appraiser
    State:
    North Carolina
    Almost all 2 story homes should have 2 condensers, and 2 interior coils. The upstairs fan/coil unit is almost always in the attic, that's why the registers on the 2nd floor are typically on the ceiling.
     
  3. Ken B

    Ken B Elite Member

    5
    Feb 18, 2004
    Professional Status:
    Certified General Appraiser
    State:
    Florida
    Look in the attic. I bet if you look over the upper level windows, you will also see a condensation drain tube over one of them. That is from the upper level unit and is an overflow tube which, when dripping water, would indicate the primary drainline is clogged and needs service.

    Re: the smaller unit. I bet the house also has gas or propane heat for the lower level. If so, the smaller exterior unit you observed is just a compressor for the lower level A/C, while the larger unit is part of a heat pump system serving the upper level.
     
  4. Laughing Heir

    Laughing Heir Senior Member

    1
    Oct 16, 2007
    Professional Status:
    Certified General Appraiser
    State:
    Pennsylvania
    I'm with these guys.

    I'm having a similar system, to what Ken described, installed at my house over the summer.
     
  5. Mr Rex

    Mr Rex Elite Member

    14
    Jan 12, 2004
    Professional Status:
    Certified Residential Appraiser
    State:
    North Carolina
    Or the smaller unit is the upstairs Heat Pump, since the heat load in the winter upstairs is so much lower.
     
  6. Ken B

    Ken B Elite Member

    5
    Feb 18, 2004
    Professional Status:
    Certified General Appraiser
    State:
    Florida
    Depends entirely upon the seasonal temperature characteristics of the locale. One could look at it differently and say that the cooling load in the summer for the upper level is much higher and thus the need for the larger unit for the upstairs.

    But I's jus a prazur, nahn injuneer...so's take eh fo wha'z wurt. :)
     
  7. Mr Rex

    Mr Rex Elite Member

    14
    Jan 12, 2004
    Professional Status:
    Certified Residential Appraiser
    State:
    North Carolina
    Prolly so, and assuming that the upstairs and downstairs are the same size etc. BTW, wonder what genius decided that that was the optimum location for the dryer vent?
     
  8. Ken B

    Ken B Elite Member

    5
    Feb 18, 2004
    Professional Status:
    Certified General Appraiser
    State:
    Florida
    Hey, it increases the ambient air temp in the area of the heat pumps and allows them to be more efficient during the winter. Purty smart move, ifns ak me.
     
  9. Mr Rex

    Mr Rex Elite Member

    14
    Jan 12, 2004
    Professional Status:
    Certified Residential Appraiser
    State:
    North Carolina
    What about the summer time? Oh yeah and that neat lint covering on the coils really helps too.:rof:
     
  10. Ken B

    Ken B Elite Member

    5
    Feb 18, 2004
    Professional Status:
    Certified General Appraiser
    State:
    Florida
    Sorry, too busy jamming to some Allman Bros. I'll have to get back to you on that.
     
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