Product review (5 stars): It Really Works
I had a difficult time installing this but that's not the fault of the vent cover, just my own severe lack of skills. Anyways, after getting it installed, I've noticed a dramatic temperature difference in our laundry room  - in a positive way. Our dryer exhaust is located directly over our a/c compressors so, when the a/c kicked on, hot air from the fans lifted the flap of the old-style vent cover and blew through the dryer and heated the laundry room. The Lambro dryer vent closure has solved the issue and is a lot cheaper than relocating the a/c compressors. BTW - I ran a heavy bead of caulking around the backside of the plate that attached to the wall to ensure a good seal.