Product review (5 stars): LOVE It!!!
No more cold laundry room or frosty dryer hose!!!! After 20 years in this home, I finally realized why the laundry room was so cold. We had several days of below zero weather here in Ohio.  The laundry room was frigid, opening the dryer was very cold, and the dryer hose was white with frost!!! OH MY!! I removed the hose and stuffed the hole. When the weather warmed up, we installed the vent closer.  Now the laundry room is not cold and no cold air comes into the dryer.  We have has days of below zero weather and everything stays toasty!