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all,

thanks for all the great advice. I had just assumed that the original HVAC system was properly sized for the house and that it was as simple as doing a 1 for 1 replacement for each unit.

I...

Guess I should have provided that detail up front -

from my past service reports I see: TTR060D100A0 and TTR048D199A1 on some reports and TUE100A960K2 and TUE080A948K2 on some other records so I'm...

Thanks for the quick reply on this and your insight on the Lennox system.

Any idea in how long my current trane system might last? Should
I do the suggested work on the units or wait until...

I live in south Texas (San Antonio) area and have some recent quotes to upgrade/replace my current 5 and 4 ton Trane units. Both units were installed in 1999 when the 3600 sq ft house was built.
...