Contractors....HVAC ductwork question

What the heck was the home owner thinking?? Up here our residential "window shakers" as we call them are 120v. BUT I gotta say that worker shoulda been checking both ends before pluggin into it. Bet he does that now! LOLCeiling in the basement is low, and we are restricted obviously with the ceiling joist height. The current rect duct(heat) hangs lower than the joists, so if I could once Im home be able to "raise" the ceiling if possible.ThanksSteve

go for it, I WOULDN`T BE AFRAID OF THAT AT ALL.-------bob:supz: