... or reducers when you have foil tape?
Our company recently bought out a smaller one. I can't imagine why they went out of business. I went out to fix a leaky vent, this is what i found. First off no 2" x 2 1/2" reducers. They just shoved the 2" into the 2 1/2". Then I guess they must have kicked over their last can of glue and decided that foil tape would work just as well. I bet the installer slept just fine that night too.