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.