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  1. #14
    Join Date
    Mar 2002
    Concord, CA
    If the Amana is nominally rated for 18 with a VS motor; and if we assume a loss of 1 point without the VS; and if we assume a loss of another point to lack of airflow due to improperly sized ducts, a smallish lineset or whatever (common problems); and if we assume a delivered SEER of 7 from the old system; then perhaps you'll save $350 a year.

  2. #15
    Join Date
    Feb 2008
    Good point. Your math looks more than reasonable. My current compressor is over 15 years old, it has to go sooner or later. Thanks for the links, very informative.

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