New Furnace and AC
Background: I purchased a home built in the 1950's. the home was expanded with an addition on first floor. A second floor was added on top of first floor at that time. We put in some (5) new windows. The current system is a 100btu 95eff pulse 21v natty gas. The AC is also Lennox 4 ton. Both units are 22 years old and we need to replace. I live in South Dakota. The house is 2000 sq foot 1st, 500 2nd, and 1000 basement. I requested 3 bids. The products offered are trane, Lennox and American standard. I received my first bid. All bids include tax, rebates, credit, install. No thermostat since I had upgraded the same in a remodel a few years ago. Also note the install will require new outlet pipe which all said will cost some but isn't difficult because of easy access.
Thoughts? Price, size, benefits of different units?
Extra: the house did have a harmony zone system 3 zones with 2 or 3 more expandable. but the dampers r sketchy. We remodeled and opened the house up by removing walls and the need for zones was not a huge concern. We will not be putting a zone system back in. Thank you in advance