Product review (1 stars): Not As Advertised
First let me start by saying, "this product is extremely poorly made."  Secondly, it was advertised as coming with: "Includes a 4-Inch by 8-Foot ProFlex UL 2158A dryer transition duct," which wasn't anywhere to be found.  This is made of very thin plastic and the parts do not fit together well so there are open seams which allow air (and lint) to escape into your room.  The damper is also poorly made and allows air to escape the unit into the "closed" duct so it isn't very effective.  Another negative aspect of this device is that there are no mounting brackets or fixtures for keeping this on or against your wall.  So please consider it's going to cost you more for mounting brackets, additional duct work, better clamps (comes with zip ties) and that this product doesn't work effectively.  I guess you've figured...I'm sending this back for a refund.