am doing some retirement planning. I want to estimate the cost and lifetime of my HVAC system.
I have central gas heat and ac. The is 2 story and about 2300 feet. The house was built in 1991.
Also, I would like to do some planning for what to expect. How long do they last? I see from some other posts that they may want to replace all the duct work. What should I look at to prepare to replace these systems. Can I just replace the AC unit or gas furnace, only the part that fails? Should I do that?
The upstairs unit is rarely used, only when we have company.
The downstairs outside AC unit is a TRANE XE 800 TTJ730A100B0. Upstairs outside is TRANE XE 800 TTJ724A100B0. My web searchs have not even turned up the tonnage of these.