"Luca" wrote in message
news
Located in coastal SC, central air unit installed in 2000, no heat
pump (hair dryer type heating element I suspect).

I am considering soo replacing unit with a more efficient unit, and
heat pump, or....maybe get a few more years out of old unit.

Suggestions?

Congratulations! I hereby nominate you for the weekly "Least Info Given"
award on AHR....