Oh yeah, and you said guys as in plural? Usually it's one person, with two or more it's a breeze. I am amazed when I see these guys work, they are fast, do very clean work, and it's always flawless (at least 95% of the time) that is if they are any good. I had a furnace installed in my garage, and it went in like clockwork, just boom, and it was done. At least the first time, they did have to send one guy back after it was inspected, (it didn't pass) and the guy that came back had to redo a lot of the work, because the inspector was a picky SOB, but it passed the second time, and the same inspector came back, and he looked it over with a fine-tooth comb, and couldn't find anything wrong.