Product review (1 stars): Doesn't include all the necessary pieces, no really, it says, "item not included" in the instructions....
this product only includes materials for rectangle horizontal venting. If you recirculate the air or vent to your attic you must buy a separate vent collar $20 (including shipping) from the company. OH forgot to mention how the plastic facing where controls are-it's crooked. SO.. I now have a brand new vent in my kitchen that looks crooked because of the careless manufacturer and non-existent quality control personnel at Air King! Thanks!