It took a couple calls and callbacks to get my estimate from Don, but when he came in at $325 for this fairly complex and time consuming install, I decided that was a fair price and asked him to come take care of it. I am glad I did, he was great to work with. Don was flexible enough to work around my tough schedule schedule and got the job done on time. After he left I went under the house to inspect the job and am glad I did - the humidifier was leaking water into the crawl space. This was occruing because it was installed at too great an angle. If I hadn't crawled under the house, I probably would not have known about the problem until I got my water bill by which time I would have had a very damp crawlspace. Needless to say I was disappointed. When I called Don he was extremely apologetic and rushed back to correct the situation. He re-insallled the humidifier at the correct angle and it has been working great ever since. Because of the incorrect initial installation I can't give Don a perfect score, but his response when I reported the issue was great, he was great to work with and his price was fair, so I would use him again for HVAC services. One thing to note, he has moved shop to the suburbs and is no longer local to West Nashville. I may try someone more local next time.