I want to replace (2) 20 year-old Trane XE 900, 3-ton, split systems. One split system for upstairs and one for downstairs. Current sytems are 20 years old, remain operational and did a decent job of cooling/heating.
Home is two-story, 3400 sq ft, 15% larger downstairs, with large and open stair-well. Climate is northern CA., Sacramento area, with mild winters and warm/hot dry summers.
Replacement systems, one for upstairs and one for downstairs, are Am Std, 3-ton, variable speed, R-410A, 15 SEER, enhanced high efficient TXV Coils 3-ton 12.5 EER, split systems, 95% AFUE downstairs and 80% AFUE upstairs. Totaline digital Thermostats. Both duck systems will be checked and repaired where required (C.E.C certificate requirement). Return duck is 15 inches upstairs and downstairs. Prefer to avoid replacing duck system, if possible.
Comments or suggestions are appreciated. Thank you.