Product review (5 stars): No more humidity issues.
I live on the coast in Texas. During the summer it is hot, humid and windy. I was having an issue with the humid air making its way back into the dryer because of the wind. The normal flapper type vent was simply not working. After putting this vent on, I have not had any issues with the humidity getting back into the dryer. If you live up north I'm positive that this would work just as well to keep out the cold.