Question about effiency of a 3 ton Armstrong Concept A/C built and installed in 1993 by subcontractor when building our house. I'm guessing 10 SEER but how much has it lost in those 15 years of heavy use (deep South).
It has gotten annual tuneups (except for last spring) and filter changes regularly. Basically, I'm crunchin' the numbers to see how long it'd take to break back even on a new, 4 ton, Amana 18 seer system with dual fuel heat
My tech examined ductwork, return, etc and said basically all had to redone. He wrote out a detailed quote of 10K and change.
This guy is a credit to your guys profession and honest about my needs.
So in a nutshell, (probably) is it STILL a 10 SEER unit or or we lookin' at single digits now
Thanx ahead for any/all help.