Product review (5 stars): This is the best vent I have found yet
This is the best vent I have found yet!  Now I have no more drafts coming in through the window.  The fact that I can put this in a different window because of the different sizes I can fix it to, makes my life easier!  Last, I like that the vent door on the outside is closed and the moment my drying machine starts, it opens easily, blowing out the air!  Great Window vent!