Product review (1 stars): Too many parts/bad designs.  Works but take a long time to reassemble if it's going through a wallZ
I've installed a few of these and this was the cheapest ive ever seen.  The design is cheap, instead of box it is 1/ 2 boxed which is hard to disassemble and reassemble in tight places.  The deflectors could use a way of staying in the corners too.  I we played with it for over an hour going trough a floor with it and finally went to lowes to get one this is just two boxes you just push together .  Much easier