The technician showed up promptly but spent a long time doing the routine service. He spent about an hour just checking the unit in my attic, but did not change the filter because he said it was not necessary. I did not feel comfortable leaving him alone in my house, so even though I had chores to do I felt I had to stay home the whole time he was there; I believe it was over 2 hours in all. However, he was courteous and polite.
