Product review (5 stars): Great product, once installed
My house doesnt have a protruding vent, so I had to buy a 4" vent extension and shove it in the vent, then I had to spray foam around the entire vent opening before installing this vent closure. Once that was set, I trimmed around to get it close to the wall. I then used double bubble adhesive to bond the vent extension to the inner lip of the vent closure. While it was drying I used a rock to prop it up (caveman, I know). After it was dry, it was VERY sturdy. but I noticed the rock I used looked very decorative, so I kept it there and added 2 more lol. Then I installed the top piece, loosely. It is sturdy enough not to come off, yet with steady pressure I can take the entire unit off to clean it instead of prying a vacuum wand down in there.