The first unit was damaged in shipping. The second unit was missing the grease filters  The third unit, which I installed was missing several screws that fasten the blower housing to the metal housing. I fixed this with some odd screws I had on hand. Then when I went to mount the charcoal filter there were no mounting screws or even hole for screws. So, again I supplied my own screws and drilled holes in the plastic blower housing. This whole project was a disaster, GE Mexico has some serious quality control issues. I would not recommend this product. Severely over priced for the head aches you get. It does look nice now that it is installed. I think I will hold on to the old Kenmore unit for a while, I don’t get a secure feeling with this.