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  1. #1

    MATCHED UNITS ????

    I have a 10 seer Trane heatpump, 3 1/2 ton, built in 1992 and matched air handler. I live in SW Florida.
    I am interested in up-gradeing SEER.....
    Tell what would happen if I put in a 13 Seer condenser...How will it work with my older Air Handler ???? What seer would it come up too ???
    THANX

  2. #2
    Join Date
    Jun 2007
    Location
    The Twilight Zone
    Posts
    2,964
    Quote Originally Posted by SRNONI View Post
    I have a 10 seer Trane heatpump, 3 1/2 ton, built in 1992 and matched air handler. I live in SW Florida.
    I am interested in up-gradeing SEER.....
    Tell what would happen if I put in a 13 Seer condenser...How will it work with my older Air Handler ???? What seer would it come up too ???
    THANX
    There have been previous posts on this subject.

    You're asking for trouble with that set-up, especially because it is a heat pump condenser. The newer higher SEER systems have larger coils than the older 10 SEER systems.

    As I recall from previous discussions:
    - The refrigerant charge will not be correct and may have to be adjusted going from cooling to heating.
    - Your SEER will be less than 10.
    - The btu output will be less than the original 3.5 tons.
    - Your electric bill may go up.
    - The new condenser may not be warranted because it is installed on a mis-matched system.
    - The HVAC repairman will love you because of future repair work.

    You've gotten 17 years out of that original system. Maybe time to upgrade the whole system.

    Take care.

  3. #3
    Join Date
    May 2007
    Location
    DC Metro Area (MD)
    Posts
    3,371
    You won't help yourself one bit doing that. To increase SEER, you need to change out both indoor and outdoor sections.

  4. #4
    Join Date
    Jul 2006
    Posts
    6,537
    In a nut shell......................dont do it.
    You sure are cocky for a starving pilgrim.

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,120
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