Mike we have the same fan with the clip that Bill does. Works well, also hooked to the light. It is a tad noisy, nice thing is you can take it off the fins (no need to remove the hot wire) when it's cool enough that you don't need the fan running. In two years, ours has never fallen off either. I intend to put some felt pads on it on the back next trip out to quiet it a tad.
Karen