Replacement Furnace/Central Air Input Please
4 BR, 2.5 bath home. Finished Basement ~800 sq ft, Main level ~ 1000 sq ft, Upper level ~800 sq ft.
Existing system was installed circa 1995 by previous owners.
Furnace: Lennox G23Q3/4-125-1, 125k in, 100k out.
A/C on slab: Lennox HS29-461-1P (3.5 ton?) & C23-46-1
2-zone damper system: Honeywell Troll-A-Temp (one for basement/lower one for upper level)
Current system generally works OK. Basement is generally warmer than needed in the winter and rather cold in the summer, perhaps due to ductwork issues. Main level is generally fine. Upper level is fine in the MBR, where the thermostat is located, but the other bedrooms farther down the duct are progressively worse. The last one needs help with a small space heater and ceiling fan.
We seem to have an increasing number of repairs in the last few years, most recently the startup cap for the fan motor needed to be replaced as the fan would not start.
Will likely get a few quotes. The two companies we have used seem to suggest Trane and Carrier. I might be able to get a reasonable price for those brands and some others through a relative as well. Looking for reliable models and to improve to a high efficiency furnace and A/C. Perhaps a 3 .5 ton or 4 ton 16-18 SEER for AC (current is 10-11 SEER?) and 95-97% furnace (80% now I think?) This is in the Chicago area. Windows and doors were replaced 2 years ago with added insulation.
Any suggestions on brands or models we should consider for quotes? Should we bite the bullet and do both now, or perhaps put in the furnace and maybe the coil this fall before winter and new A/C condenser next spring? Thanks in advance!