[JRTJH]

You can pretty much put the fan in any roof vent of your choice. As small as most trailers are, the air movement will exchange air in the entire trailer effectively. So, installing the "max-aire" or "Fan-tastic" in the bathroom serves a dual purpose. Plus, there are already 12VDC wires at that roof vent.

And, the benefit of not having it in the living room ceiling is reduced noise when you're trying to watch TV.