I really appreciate your help. Unfortunately, I do not live in an area where there are a lot of reputable contractors for this job. (actually, the way I hear it, who does?) Anyway, I may just go with him unless his price seems outrageous. I think your reaction to my original post cooled my heals some. I really felt that I had gotten ripped off by him. I thought that he should have told me that this system wouldn't help with the lousy duct work I had. Anyway, he does seem more than willing to help... which from my experience with any kind of contractor is unusual (they don't even return your calls most of the time). Or, they tell you they'll do the work but can't for another month because of other work. When that month is up... they never return your calls; not even to say no can do. Why is that?