fantastic fan create-a-breeze

Easy way to install the fan: cut the roofing all around the existing vent, remove screws and it comes right up. Put eternabond all around, sealing the cut area. Using the included closed cell gasket, install the fan and the cover brackets and Dicor the screw heads.
I really feel that all vents should have a matching cover.
I got the reversible model because others have used it to do leak tests. I haven't yet, but intend to when we get home from this trip.