Derek,
I just replaced the 22 year old a/c system in my house, at the time I bought
the house I bought the best and highest effceient unit I could buy at the
time. It was a whopping 10.2 SEER.
The new unit I replaced it with was the highest effieciency I could find,
19.2 SEER. My electric bill went down over 34%. I also had a new furnace
and a/c condenser, plus new duct work. Not cheap but well worth the
expense. Plus the compressor is a whole lot quieter than the old unit.
Just my 2 cents woth.
Larry Zink
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