"I just returned from out of town and am catching up on e-mails. I was very happy with the way Hetter performed the installation - they were very considerate, and did a clean, neat job. Rick followed up with calls, and the furnace has been very efficient. I even noticed a decrease in my electric bill. As for the AC, Hetter came out over a week ago to test the system and make sure it was ready for the summer. It seemed quiet to me. If you choose Hetter, I hope you enjoy your experience with them, as well as their Trane product, as much as I do." Rose - Dublin