Product review (3 stars): Only used two pieces of the shipment but might use the other parts later
I was not aware that this was like a microwave recirculating kit.  The idea of the kit is that you cut a hole in the back wall and redirect the ventilation into another room.  Needless to say I have kept all the parts just in case I decide the cut the hole.  Currently I have the vent directed upwards and I intend to put or something over the open vent to make sure smoke or oil does not hit the walls and ceiling.