I just purchased a stove from a dealer very recently. It was preassembled (but not used) when I received it. After watching the DVD, I realize that I do not have the automatic shutoff that is installed in case the exhaust is blocked. I didn't get from the DVD whether this part was exclusive to the power vent or not. I do not need the power vent as we have an existing chimney that is a good application for our new stove.
I don't think this is a big deal, but figured maybe I had an older model that didn't include this piece.