As you know, it's very easy to find a contractor
that's willing to "sell by the ton".And with the more
being the better. Let someone say that they're distressed
with their current unit running 'most of the time', and they'll
quickly deliver one that's big enough to run an aircraft carrier.
The HVAC industry has done a dismal job of policing its
ranks, it is full of knuckle-dragging idiots that bring down the
profession, and insiders to the profession see it all the time.
Being licensed doesn't assure competance, but it certainly
helps narrow the field.

Steve@carolinabreezehvac wrote in
message ...
You get a licenced, competent contractor out there that will run what is
called a manual D, and J.
That will tell you the corrrect BTU rating (tons should be outlawed as a
form of description, since no two makes are the same) that you need for
the
home, and not some wild assed guess that will cost you more long term.
No legitimate contractor will come out and install what YOU say to
install....he will install what you NEED.