I'm considering replacing my 24 year old Lennox Whisperheat and possibly my 18 year old A/C as well. I haven't really had problems with them, but the furnace is oversized and with current incentives it seems like a good time to proactively take care of business. I've received several quotes from dealers including Amana, Goodman, Bryant, Carrier, and Lennox. I threw out the Goodman quote and will likely do the same with Amana. That leaves me with the following options for the furnace:
Lennox EL296UH070XV36B, 70,000 btu, 10 year parts, 5 years labor (Actually dealer did recommend against variable speed and offered alternate model EL296E)
Carrier Performance 59TP5A060, 60K btu, 10 year parts, 1 year labor (2 stage, variable - very confident in sizing and offered to run heat loss calc if we move forward)
Bryant Preferred 925TA42060EIT, 60K btu, 10 year parts, 10 year labor, but requires service from them every year to maintain labor warranty (2 stage, variable - originally was convinced about 80K unit but ran quick calc (no measurements were taken except size of house)
(offered discount on A/C unit if I replace at this time)
(this dealer also recommended Payne as an alternative saying that they were identical with exception of cabinet aesthetics)
Carrier came in with the lowest bid. All three dealers are proposing the same things... re-working return, air cleaner, humidifier and chimney liners, etc.
My house is 85 years old, 1600 square feet, 2 story with newer windows throughout in southern Michigan. I blew about R50+ in the attic and it has had insulation blown in the walls (I verified a nice blanket of insulation in wall when I remodeled bathroom).
Anything I should be concerned about if I decide to keep my current A/C?
Should I be concerned about the variable speed fan not reaching second floor? All other dealers didn't see this as a concern and thought variable speed would be better.
All 3 dealers are reputable, so it's making this really tough.
Any feedback you can provide would be appreciated.