He is not quite right. After January 23, it is illegal to MANUFACTURE
anything less than 13 SEER. They can still be sold & installed till
they are out of stock.
Trane equipment normally lasts 12 to 15 years here in Myrtle Beach SC.
Trane uses aluminum tubing with aluminum fins in a very reliable coil
that has stood the test of time. The rest of the unit uses copper
tubing, hence the transitions.
If the leak has been found in the outdoor unit, why is he replacing the
line set? If the line is too small, that is the only reason that I can
When I must replace a line set in that manner, I normally run it inside
a downspout that matches the downspout on the house if there is any.
Normally, to get a true 12 SEER, the indoor coil or indoor unit must be
replaced also. Make sure you get an ARI certified match.
This guy sounds pushy to me. He is probably on commission. You may
want a second opinion. You may also want the indoor coil checked for
leaks as well.