We live in Central Texas where temperatures stay in the 90's for half
the year and are mild for most of the winter. Our current 4 ton York
unit is 12 years old and starting to fail (freon leaks in the coil
among other things).

We have had several different estimates for a new installation from
local companies that vary considerably - all for units from different
manufacturers. Though Carrier seems to be the most recommended brand
online, none of these companies offer Carrier.

Instead we have been offered Trane, Amana and Fridgidaire. Amana is the
cheapest, Trane much more expensive. Has anyone had experience with new
installation of these brands in the past few years?

Is Trane worth the extra money for a similar SEER rating?

What other questions do you feel are most important to ask the
installers?

Thanks,

Murk