i have been in talks with local geo contractors in the Tulsa area and have been given only ballpark figures for installing a system. Currently I am being told to install a 40+ eer system at my residence that it could cost anywhere from 50-60k. From the research I have done on this site this seems extremely excessive. My current home is 3,000 sq feet and has a 4 ton and a 2 ton unit installed. On top of that in the last month I had spray foam installed in my attic rafters as my units are installed there with all the ductwork. I was thinking of having one Waterfurnace series 7 installed with IntelliZone2 so that I could potentially get away with installing one unit instead of two. If anyone has any recommendations or knows anyone who could give me a resonable quote I would greatly appreciate it.