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  1. #1
    Join Date
    Mar 2006
    Posts
    20
    I appreciate advise on Infinity 80 size, whether to use 58CVA070-12 or 58CVA-090-16 on 1900 sq ft, 1st floor.

    1st floor split to be replaced is:
    - gas furn. 58PAV070-12, out_cap= 53K; in_BTU= 66K.
    - 2.5T A/C (builder grade: 38CK030).

    ---------Low Out Cap/In BTU-----Hi OutCap/In
    070------35K/43.5K (80.45%)----54K/66K (81.8%)
    090------47K/58K (81%)---------71K/88K (80.7%)

    Will set TSAT at 78 in summers; 68 in winters. We'll use Infinity control.

    090 has better SEER/EER/HSPF and less annual expense in ARI directory for the coil and Carrier Performace 2.5T heat pump.

    Note: I backed off 2-Infinity HP because not in till May, price, oversize concerns, and other. Hybrid split replacemt got pushed out till next wk.
    Thanks, AAR


    [Edited by aar on 03-17-2006 at 12:36 AM]

  2. #2
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    5,987
    Originally posted by aar
    I appreciate advise on Infinity 80 size, whether to use 58CVA070-12 or 58CVA-090-16 on 1900 sq ft, 1st floor.

    1st floor split to be replaced is:
    - gas furn. 58PAV070-12, out_cap= 53K; in_BTU= 66K.
    - 2.5T A/C (builder grade: 38CK030).

    ---------Low Out Cap/In BTU-----Hi OutCap/In
    070------35K/43.5K (80.45%)----54K/66K (81.8%)
    090------47K/58K (81%)---------71K/88K (80.7%)

    Will set TSAT at 78 in summers; 68 in winters. We'll use Infinity control.

    090 has better SEER/EER/HSPF and less annual expense in ARI directory for the coil and Carrier Performace 2.5T heat pump.

    Note: I backed off 2-Infinity HP because not in till May, price, oversize concerns, and other. Hybrid split replacement got pushed out till next wk.

    [Edited by aar on 03-17-2006 at 12:36 AM]
    What is the age of current system?
    What is the objective of the replacements ?

    1. More comfort
    2. < Operating cost
    3. Pay-back
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  3. #3
    Join Date
    Mar 2006
    Posts
    20
    12 yrs old. The fan in furnace broke but I think its not just the fan but more to it. I was told at this is age things turn downhill; fix, then something else emerges or breaks.

    THroughout the 12 yr old neighborhood, we are noticing same: HVAC replacements, regardless of HVAC brand.

    The carrier & power company spring rebates are influencing an iota.
    --AAR

  4. #4
    Join Date
    Mar 2006
    Posts
    20
    My apologies: 11 years old.

    And yes, upon deciding to go replacement route, then all three in your list are objectives.

    Re: comfort, we've been OK with 2.5T in 1st level for 11 yrs. If I bump up to 3Ton, it would be in 2nd level's system after I replacng the 1st level's split.

    re: op cost, yes, I would want to minimize but there are tradeoffs.

    re: recover cost, I assume you mean home value. The main thing towards that I see is R-410 . There is no realistic hope on recovering part of cost (like remodelling a kitchen or bath) but pls elaborate on whatever I'm missing.

    Thanks,AAR

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