Added 12” wall fan in small bedroom appx 8’ by 11’ in new fifth wheel trailer. Used existing wall mount for TV we didn’t want, surfacing the metal bracket with wood and painting to coordinate with interior. At first I thought the fan might be a little too much for the space, but it has been working very nicely for us.
https://www.amazon.com/Hurricane-Wall-Mount-Fan-Oscillation/dp/B06XQKKP22