Thanks Tim for the reply.
Here's just about everything else related to the install bid:
-The zone system will be a new installation, there is not currently one in place
-A new return will be installed on the second floor
-Additional efficiency measures: new ductwork and duct sealing, and attic insulation are being performed as well. These services have been itemized to $2750, which seems high to me. I realize these parts of the job are very site specific, and may not be easy for you to approximate, but a rough guess is appreciated. The house is about 1350 square feet, and two stories, if that helps at all.
-I think those are all of the relevant bits and pieces , please let me know if I can provide any other information.
-Finally, I assume that the estimated numbers you are suggested are BEFORE any government rebates I will be eligible for.
Sorry I got called away.That seems a bit high for just the ductwork.I think I would get at least 2 more estimates. Just remember to get estimates for exact same system and brands, as this can change the entire scenario. Since the first estimate is using Lennox equipment, in fairness you would want to compare with other Lennox dealers. Here is a link where you can enter your zip code and find other Lennox dealers close to you.
Now if you are not set on the Lennox brand, you could also get estimates using Rheem equipment and save several hundred dollars and in my opinion,have as good of equipment.All will carry a 10 year warranty. Here is also a link to Rheem site where you can do same.
(Enter zip code).