The Nicro's, new and old models, are on sale for $100 at WM this weekend. I looked at the old models at WM and was surprised that the 3" and 4" are the same size accept for the hole size. Doesn't make sense to go with the lower flowing 3" if you are still stuck with the 9" diameter exterior. I'm hesitant to mount this fairly large vent on my 27' boat, but I'll probably appreciate it in the long run and may reduce my reliance on the damp-rids.
Anyone have any information about the new Nicro solar vents? I know the motor is replaceable.